QADA

Line plots across dimensions of each concept
Line plots across concepts
Tables

Plots across concepts

IncomeStatement

Expenses

Balance Sheet

Assets

Current Assets

NonCurrent Assets

PropertyPlantAndEquipmentNet

Liabilities

Current Liabilities

Noncurrent Liabilities

Stockholders Equity

CashFlow

NetCashProvidedByUsedInOperatingActivities

NetCashProvidedByUsedInInvestingActivities

NonoperatingIncomeExpense

FiniteLivedIntangibleAssets

AccountsReceivable

Tables

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA	█████▆▆▆▆▆▆▆▆▆▆▆▆▆▆████▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁	0.017	0.017	0.017	0.017	0.017	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.017	0.017	0.017	0.017	0.016	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	NA	0.014	NA	NA
us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassA		NA	NA	17.113282	17.108846	17.029822	16.605215	16.605215	16.605215	16.605215	16.605215	16.605215	16.605215	16.605215	16.605215	16.605215	16.605215	16.605173	16.605173	16.603799	16.603729	16.603729	16.603729	16.602512	16.152405	14.152302	14.152287	14.150543	14.150089	14.149715	14.149675	14.148905	14.148217	14.148131	14.147996	14.146837	14.146418	14.146418	14.146416	NA	14.146416	NA	NA
us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassB		NA	NA	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.537366	3.537366	3.537326	3.537322	3.537298	3.537283	3.537283	3.537101	3.537029	3.536985	3.536985	3.536952	3.536822	3.536819	3.536816	3.536663	3.536609	3.536609	3.536604	NA	3.536604	NA	NA
us-gaap:PreferredStockSharesAuthorized		NA	NA	5.0	5.0	5.0	5.0	NA	5.0	5.0	0.0	NA	5.0	NA	5.0	5.0	5.0	NA	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	NA	5.0	NA	NA
us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassA,us-gaap:CommonStock		NA	NA	0.017113	0.017109	17.03	16.605	16.605	16.605	16.605	16.605	16.605	16.605	NA	NA	NA	16.605	NA	NA	NA	16.604	NA	NA	NA	16.152	NA	NA	NA	14.15	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassB,us-gaap:CommonStock		NA	NA	0.003537	0.003537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	NA	NA	NA	3.537	NA	NA	NA	3.537	NA	NA	NA	3.537	NA	NA	NA	3.537	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:TreasuryStock		NA	NA	-0.000216	-0.000216	-0.216	-0.332	-0.505	-0.515	-0.517	-0.529	-0.718	-0.892	NA	NA	NA	-1.125	NA	NA	NA	-1.366	NA	NA	NA	-1.61	NA	NA	NA	-1.93	NA	NA	NA	-2.097	NA	NA	NA	-1.804	NA	NA	NA	-1.722	NA	NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA	██▁	17.864	17.813	17.112	NA	17.795	16.465	16.367	NA	17.948	17.927	17.826	NA	16.011	15.914	15.809	NA	16.602	16.28	15.594	NA	16.308	16.261	16.048	NA	13.487	13.505	12.628	NA	12.99	12.903	12.429	NA	0.013016	13.082	13.212	NA	0.013382	13.297	NA	NA	NA	NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB	██▁	3.387	3.389	3.321	NA	3.398	3.264	3.264	NA	3.433	3.434	3.414	NA	3.214	3.212	3.21	NA	3.301	3.275	3.204	NA	3.286	3.284	3.279	NA	3.265	3.273	3.168	NA	3.235	3.231	3.145	NA	0.00326	3.264	3.287	NA	0.003301	3.294	NA	NA	NA	NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock us-gaap:CommonClassA	█▅▁	17.367	17.245	17.112	NA	16.918	16.465	16.367	NA	16.358	16.266	16.076	NA	16.011	15.914	15.809	NA	15.773	15.694	15.594	NA	15.559	15.467	15.262	NA	12.865	12.768	12.628	NA	12.526	12.473	12.429	NA	0.012561	12.649	12.693	NA	0.012975	12.9	NA	NA	NA	NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock us-gaap:CommonClassB	█▁▁	3.33	3.321	3.321	NA	3.308	3.264	3.264	NA	3.264	3.263	3.232	NA	3.214	3.212	3.21	NA	3.206	3.205	3.204	NA	3.203	3.201	3.196	NA	3.189	3.181	3.168	NA	3.149	3.145	3.145	NA	0.003157	3.164	3.168	NA	0.003203	3.195	NA	NA	NA	NA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:StatementClassOfStock us-gaap:CommonClassA	▁▁█	0.304	0.34	1.845	NA	0.368	2.897	2.899	NA	0.241	0.351	NA	NA	3.366	3.219	3.036	NA	1.135	1.027	2.807	NA	0.64	0.504	0.326	NA	0.33	0.312	2.778	NA	2.654	2.592	2.804	NA	2.484	2.3	2.086	NA	2.19	2.2	NA	NA	NA	NA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:StatementClassOfStock us-gaap:CommonClassB		NA	NA	0.15	NA	NA	0.278	0.278	NA	NA	NA	NA	NA	0.378	0.384	0.389	NA	0.18	0.151	0.349	NA	0.12	0.095	0.06	NA	0.067	0.04	0.371	NA	0.354	0.37	0.456	NA	0.384	0.3	0.377	NA	0.463	0.5	NA	NA	NA	NA
us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock us-gaap:CommonClassA		NA	0.0	-0.02	0.02	0.01	-0.69	-0.17	0.26	0.16	0.06	0.07	-0.28	-0.01	-0.06	-0.14	-0.82	0.08	0.03	-0.15	0.23	0.14	0.09	0.03	0.44	0.33	0.06	-0.01	0.29	0.14	0.08	-0.08	0.13	0.12	0.06	0.12	0.24	0.19	0.2	0.07	NA	NA	NA
us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock us-gaap:CommonClassB		NA	0.0	-0.02	0.02	0.01	-0.57	-0.14	0.22	0.13	0.05	0.06	-0.23	-0.01	-0.05	-0.12	-0.68	0.07	0.03	-0.13	0.22	0.12	0.08	0.03	0.37	0.27	0.05	0.0	0.24	0.11	0.07	-0.07	0.11	0.1	0.05	0.1	0.2	0.16	0.16	0.06	NA	NA	NA
us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassA		NA	0.0	-0.02	0.02	0.01	-0.69	-0.17	0.24	0.14	0.05	0.07	-0.28	-0.01	-0.06	-0.14	-0.82	0.08	0.03	-0.15	0.19	0.14	0.09	0.03	0.42	0.31	0.06	-0.01	0.27	0.13	0.08	-0.08	0.13	0.12	0.06	0.12	0.23	0.19	0.19	0.06	NA	NA	NA
us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassB		NA	0.0	-0.02	0.02	0.01	-0.57	-0.14	0.21	0.12	0.05	0.06	-0.23	-0.01	-0.05	-0.12	-0.68	0.07	0.03	-0.13	0.18	0.12	0.07	0.02	0.36	0.27	0.05	0.0	0.23	0.11	0.07	-0.07	0.11	0.1	0.05	0.1	0.19	0.15	0.16	0.05	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
COGS Ratio us-gaap:ProductOrService qada:ProfessionalServices	▁▁▂▂▃▃▄▄▅▇█▅▅▄▄	14.189	13.486	15.747	15.901	17.485	17.388	18.364	19.07	20.682	25.969	26.93	22.062	20.7	19.824	18.868	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
COGS Ratio us-gaap:ProductOrService us-gaap:License	▁▃▁▅▃▃▄█▄▅▅▆▆▆▅	1.682	3.043	1.221	5.293	3.295	3.516	4.466	9.11	4.631	5.561	6.266	7.171	6.628	6.743	5.265	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
COGS Ratio us-gaap:ProductOrService us-gaap:Maintenance	▂▁▁▄▅▅▅▆▆▆▇▇█▇▇	27.028	26.486	26.408	28.712	29.699	29.586	29.899	30.478	30.401	30.574	31.483	31.858	32.407	31.971	31.906	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
COGS Ratio us-gaap:ProductOrService us-gaap:SubscriptionAndCirculation	█▇▇▆▆▅▅▄▄▄▃▃▂▂▁	33.761	31.066	30.771	28.646	27.328	25.888	25.306	24.048	23.863	22.439	21.511	19.662	17.19	17.42	15.343	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
TTM Greenblatt ROC _ _	▆▅▃▄▄▁▂▆▅▄▅▂▄▄▃▆▅▃▂▆▅▅▄█▇▅▄▇▆▄▂▅▅▄▆▇▆▆▅	4.067	2.313	-0.933	0.351	1.396	-4.173	-3.262	3.564	2.474	1.726	1.809	-2.688	0.43	0.543	-1.359	4.136	2.259	-0.363	-2.939	3.621	3.467	2.323	0.76	7.734	5.889	2.064	0.298	5.833	3.801	1.49	-1.721	3.216	3.08	1.558	3.954	6.323	4.298	4.647	2.624	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax	▆▆▆▆▆▆▆▇▇██▇▆▆▅▅▅▅▄▅▄▅▅▇▆▅▄▅▄▄▃▄▃▃▃▄▃▃▃▃▂▁	76.66	74.081	74.147	78.552	77.807	76.378	78.035	82.706	79.577	84.543	86.19	80.753	76.925	75.958	71.382	73.264	69.534	69.778	65.397	69.259	68.037	71.291	69.265	79.562	74.004	73.05	68.485	73.53	65.66	65.194	61.927	65.786	61.709	60.969	63.708	65.165	60.733	61.957	59.403	62.457	55.409	51.305
us-gaap:CostOfGoodsAndServicesSold	▂▂▂▂▂▃▃█▃▃▃█▃▃▃▆▂▂▂▆▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁	30.655	30.823	32.425	33.226	33.717	36.032	36.934	79.142	37.361	40.436	41.067	83.441	38.046	36.694	34.866	69.128	33.057	32.905	32.11	65.638	31.005	32.628	32.098	33.909	33.071	33.219	31.431	30.699	28.905	28.777	28.625	27.424	26.531	27.019	26.619	26.278	26.155	26.812	26.094	26.887	22.921	21.488
us-gaap:GrossProfit	█▇▆█▇▆▆█▆▇█▆▅▅▄▆▄▄▃▅▄▅▄█▆▅▄▇▄▄▃▅▃▃▄▅▃▃▃▃▂▁	46.005	43.258	41.722	45.326	44.09	40.346	41.101	45.686	42.216	44.107	45.123	40.934	38.879	39.264	36.516	40.412	36.477	36.873	33.287	38.428	37.032	38.663	37.167	45.653	40.933	39.831	37.054	42.831	36.755	36.417	33.302	38.362	35.178	33.95	37.089	38.887	34.578	35.145	33.309	35.57	32.488	29.817
us-gaap:OperatingExpenses	▇▆▇█▇██▇▆▇▇▇▅▅▅▄▃▅▄▄▃▄▄▅▄▅▄▅▃▄▄▄▂▃▃▃▂▂▂▂▁▁	41.938	40.945	42.655	44.975	42.694	44.519	44.363	42.122	39.742	42.381	43.314	43.622	38.449	38.721	37.875	36.276	34.218	37.236	36.226	34.807	33.565	36.34	36.407	37.919	35.044	37.767	36.756	36.998	32.954	34.927	35.023	35.146	32.098	32.392	33.135	32.564	30.28	30.498	30.685	31.826	28.644	28.729
us-gaap:ResearchAndDevelopmentExpense	█▇█▇▇██▇▇▇█▆▆▅▅▄▄▄▄▃▃▄▄▃▃▄▅▃▃▄▄▃▃▂▃▂▂▂▁▁▁▂	14.177	13.161	14.017	13.247	13.622	13.87	13.987	13.319	13.155	13.513	14.006	12.329	12.111	11.689	11.532	10.568	10.807	11.149	11.134	9.797	10.193	10.59	10.657	10.066	10.152	10.902	11.195	10.106	9.817	10.469	10.845	9.891	9.697	9.21	9.534	9.177	8.811	9.237	8.483	8.295	8.134	8.819
us-gaap:GeneralAndAdministrativeExpense	██▇█▅█▆▃▃▆▆▄▄▅▄▂▂▄▂▂▂▄▃▃▃▅▅▂▂▃▂▂▂▃▃▁▁▁▂▂▁▂	10.281	10.299	10.017	10.398	9.234	10.392	9.418	8.425	8.095	9.366	9.362	8.849	8.556	9.224	8.593	7.895	7.934	8.521	8.005	7.97	7.676	8.602	8.441	8.216	8.295	9.265	8.904	7.793	7.776	8.431	7.946	7.758	7.654	8.435	8.105	7.364	7.495	7.397	7.713	7.983	7.486	7.727
us-gaap:SellingAndMarketingExpense	▅▅▅▇▆▆▇▇▅▆▆█▅▅▅▅▃▅▄▄▃▄▄▆▄▅▄▆▃▄▄▄▃▃▃▄▂▂▃▃▂▁	17.415	17.42	18.557	21.262	19.771	20.191	20.891	20.312	18.447	19.502	19.946	22.387	17.697	17.697	17.587	17.65	15.312	17.4	16.922	16.877	15.531	16.982	17.145	19.466	16.421	17.421	16.477	18.92	15.183	15.85	16.056	17.233	14.747	14.747	15.496	16.009	13.974	13.864	14.489	15.493	13.024	12.183
us-gaap:OperatingIncomeLoss	▆▅▃▄▄▁▂▆▅▄▅▂▄▄▃▆▅▃▂▆▅▅▄█▇▅▄▇▆▄▂▅▅▄▆▇▆▆▅▆▆▄	4.067	2.313	-0.933	0.351	1.396	-4.173	-3.262	3.564	2.474	1.726	1.809	-2.688	0.43	0.543	-1.359	4.136	2.259	-0.363	-2.939	3.621	3.467	2.323	0.76	7.734	5.889	2.064	0.298	5.833	3.801	1.49	-1.721	3.216	3.08	1.558	3.954	6.323	4.298	4.647	2.624	3.744	3.844	1.088
us-gaap:InterestExpense	▆▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▇▆▇▆▇▆▇▇▇▇▇▆█▁▁▁▁▂▁▁▁	0.142	0.155	0.15	0.153	0.176	0.148	0.153	0.155	0.177	0.154	0.157	0.161	0.195	0.157	0.156	0.167	0.168	0.161	0.174	0.168	0.171	0.19	0.183	0.213	0.185	0.232	0.181	0.199	0.218	0.209	0.203	0.215	0.159	0.33	-0.286	-0.312	-0.305	-0.287	-0.27	-0.324	-0.317	-0.309
us-gaap:InterestPaidNet	▁▃▂▂▅▂▃▃▃▃▃█▃▃▃	0.135	0.149	0.144	0.146	0.17	0.145	0.149	0.15	0.153	0.151	0.154	0.193	0.155	0.154	0.149	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherNonoperatingIncomeExpense	▅▁█▅▄▆▆▃▇▆▆▄▆▂▄▆▆▆▃▆▅▆▅	-0.194	-1.871	1.232	-0.008	-0.386	0.154	0.172	-0.922	0.636	0.269	0.404	-0.613	0.413	-1.208	-0.604	0.46	0.413	0.433	-0.87	0.286	-0.061	0.413	0.119	NA	NA	NA	NA	NA	NA	NA	NA	1.36	-0.376	-0.092	0.446	0.127	-0.041	-0.356	0.818	0.287	0.139	-0.099
us-gaap:AllocatedShareBasedCompensationExpense	██▄▆▆▆▄▅▄▇▄▄▄▅▃▃▃▅▃▃▃▅▂▂▂▃▁▁▂▃▁▁▂▂▁▁▂▂	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106	2.253	2.311	2.592	1.768	1.802	1.82	2.418	1.554	1.822	1.881	2.431	1.306	1.199	1.209	1.709	0.876	0.966	1.22	1.55	0.944	1.002	1.139	1.428	1.039	1.005	1.228	1.162	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	▆▄▄▄▄▁▂▅▅▅▅▁▄▃▂▆▅▃▁▆▅▅▄█▇▅▃▇▅▅▂▅▅▄▅▇▆▆▄▅▅▄	3.839	0.5	0.585	0.764	1.529	-3.378	-2.519	3.174	3.579	2.584	2.58	-3.016	1.088	-0.329	-1.951	4.61	2.688	0.068	-3.811	3.835	3.315	2.633	0.753	7.707	5.924	2.006	-0.052	6.114	3.429	2.163	-1.554	2.921	2.684	1.3	3.385	6.044	4.222	4.862	1.672	3.264	3.528	0.989
us-gaap:NonoperatingIncomeExpense	▄▁█▆▅▆▆▄▇▇▆▄▆▃▄▆▆▆▃▅▄▅▅▅▅▅▄▅▄▆▅▄▄▄▆▅▅▄▇▆▅▅	-0.228	-1.813	1.518	0.413	0.133	0.795	0.743	-0.39	1.105	0.858	0.771	-0.328	0.658	-0.872	-0.592	0.474	0.429	0.431	-0.872	0.214	-0.152	0.31	-0.007	-0.027	0.035	-0.058	-0.35	0.281	-0.372	0.673	0.167	-0.295	-0.396	-0.258	0.569	0.279	0.076	-0.215	0.952	0.48	0.316	0.099
us-gaap:IncomeTaxExpenseBenefit	▂▂▂▂▂▅▂▁▂▂▂▂▂▂▂█▂▁▁▁▂▂▂▂▂▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂	0.626	0.44	0.995	0.354	1.404	9.872	0.715	-1.762	0.597	1.471	1.183	2.156	1.249	0.832	0.62	19.769	1.155	-0.532	-1.069	-0.311	0.729	1.002	0.204	0.76	0.834	1.021	0.024	1.768	1.38	0.909	-0.291	0.91	0.859	0.341	1.541	2.36	1.212	1.792	0.652	1.321	1.855	0.674
us-gaap:IncomeTaxesPaidNet	▂▇▂▂▁█▂▃▃▃▂▅▃▇▁	0.741	1.445	0.758	0.705	0.606	1.577	0.791	0.917	0.926	0.833	0.799	1.096	0.835	1.374	0.656	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:NetIncomeLoss	▇▆▆▆▆▂▅▇▇▆▆▄▆▅▅▁▆▆▅▇▇▆▆█▇▆▆▇▆▆▅▆▆▆▆▇▇▇▆▆▆▆	3.213	0.06	-0.41	0.41	0.125	-13.25	-3.234	4.936	2.982	1.113	1.397	-5.172	-0.161	-1.161	-2.571	-15.159	1.533	0.6	-2.742	4.146	2.586	1.631	0.549	6.947	5.09	0.985	-0.076	4.346	2.049	1.254	-1.263	2.011	1.825	0.959	1.844	3.684	3.01	3.07	1.02	1.943	1.673	0.315
us-gaap:ComprehensiveIncomeNetOfTax	▇▇▅▆▆▂▅█▇▆▆▅▆▆▅▁▇▆▅▇▇▆▆██▆▆█▇▆▆▇▇▆▇▇▇▇▆	3.618	1.667	-3.065	0.004	-0.188	-12.952	-3.497	6.113	1.808	0.787	0.887	-4.398	-0.904	-0.029	-1.931	-15.402	1.513	0.354	-2.136	3.973	2.12	0.886	0.622	5.821	5.963	0.639	0.063	5.294	1.788	1.272	-0.89	3.403	2.381	0.884	1.989	2.734	2.75	3.113	0.45	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:Assets	▆▆▆█▅▆▇█▅▆▆▇▄▅▅▆▅▅▅▆▄▅▅▆▂▂▂▃▁▂▂▃▁▁▂▂▁▁	284.926	285.988	286.959	322.804	275.067	288.387	311.423	317.174	270.51	279.943	291.248	299.817	255.587	257.538	265.797	280.89	258.082	264.947	271.376	286.413	248.166	258.434	266.625	283.369	202.751	212.482	215.911	234.813	196.798	200.091	206.637	225.948	190.472	191.587	201.622	218.145	193.107	198.45	NA	213.094	NA	NA
us-gaap:Liabilities	▂▃▃█▁	166.81	173.786	173.088	206.739	157.993	NA	NA	183.927	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LiabilitiesAndStockholdersEquity	▆▆▆█▅▆▇█▅▆▆▇▄▅▅▆▅▅▅▆▄▅▅▆▂▂▂▃▁▂▂▃▁▁▂▂▁▁	284.926	285.988	286.959	322.804	275.067	288.387	311.423	317.174	270.51	279.943	291.248	299.817	255.587	257.538	265.797	280.89	258.082	264.947	271.376	286.413	248.166	258.434	266.625	283.369	202.751	212.482	215.911	234.813	196.798	200.091	206.637	225.948	190.472	191.587	201.622	218.145	193.107	198.45	NA	213.094	NA	NA
us-gaap:StockholdersEquity	▇▆▆▆▇▆██▇▇▇▅▆▆▆▆█▇▇▇▇▇▇▆▂▂▂▂▁▁▁▁▁▁▂▂▂▁	118.116	112.202	113.871	116.065	117.074	115.86	130.272	133.247	126.043	123.59	125.309	105.628	109.229	109.63	111.022	112.686	127.88	125.126	125.348	127.011	123.81	121.563	120.322	111.706	68.963	63.025	63.511	64.205	59.41	57.767	56.488	58.198	60.645	60.529	62.008	62.015	63.081	60.925	NA	56.091	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:AssetsCurrent	▆▆▆█▅▆▇█▆▆▇█▆▆▆▇▅▆▆▇▅▅▆▇▂▂▃▄▁▁▂▃▁▁▂▃▁▂	205.84	203.886	210.216	242.637	196.562	207.874	223.678	244.34	203.993	214.902	224.836	246.397	204.421	206.099	215.58	229.874	200.603	206.994	212.194	227.47	189.613	199.596	206.788	223.525	141.78	149.943	153.319	170.434	127.522	130.203	136.644	155.793	124.782	125.999	140.977	157.892	129.778	134.796	NA	149.403	NA	NA
us-gaap:CashAndCashEquivalentsAtCarryingValue	▇▇▇▇▇▇█▇▇▇▇█▇██▇▇▇▇▇▆▆▆▆▂▂▃▂▂▂▂▂▂▂▃▃▂▃▂▂▁▁	143.392	140.707	140.154	136.717	133.815	141.768	150.99	139.413	138.08	139.528	144.389	147.023	140.027	149.202	153.348	145.082	135.689	134.708	139.878	137.731	126.621	130.085	130.864	120.526	71.411	75.339	78.225	75.984	65.799	69.395	73.781	65.009	69.702	73.843	78.353	76.927	75.055	78.838	73.411	67.276	57.734	55.763
us-gaap:AccountsReceivableNetCurrent	▁▂▃█▂▂▃█▂▄▄█▃▂▂▆▁▂▂▅▂▂▃▇▂▃▃▆▂▂▂▆▂▁▂▅▂▂	39.187	42.27	46.572	80.968	39.748	41.495	49.019	81.577	46.42	54.258	56.909	83.518	50.753	42.397	46.381	69.441	39.1	45.468	44.829	65.512	41.233	45.957	51.222	78.887	46.432	52.662	51.398	71.337	44.522	42.733	43.264	72.564	40.259	36.343	45.103	64.757	40.922	41.666	NA	65.62	NA	NA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent	▇▅▇█▇▇▆▆▅▆▇▂▁▂▂▂	23.261	20.909	23.49	24.952	22.999	23.411	22.469	22.15	19.493	21.116	23.538	15.856	13.641	14.5	15.851	15.351	NA	NA	NA	16.024	13.162	14.617	15.436	14.799	15.904	13.667	15.414	14.98	12.914	13.786	15.184	13.806	NA	NA	NA	11.853	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	██▄▂▁▅	41.289	41.371	39.764	38.861	38.4	40.1	NA	39.173	NA	NA	NA	37.561	NA	NA	NA	33.77	NA	NA	NA	32.845	NA	NA	NA	31.507	NA	NA	NA	42.116	NA	NA	NA	43.583	NA	NA	NA	43.729	NA	NA	NA	NA	NA	NA
us-gaap:AmortizationOfIntangibleAssets	▇▇▇██▇█▇▁	0.065	0.065	0.064	0.068	0.067	0.066	0.067	0.066	0.045	NA	NA	0.057	0.085	0.111	0.163	0.163	0.165	0.166	0.165	0.163	0.165	0.166	0.164	0.171	0.176	0.179	0.18	0.179	0.178	0.177	0.176	0.119	0.088	0.057	0.0	0.0	0.0	0.0	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentNet	▁▃▃▃▃▄▄▄▄▄▄▅▅▅▅▅▅▆▆▆▇▇▇▇█▇▇▇█▇▇▇▇▇▇▇▇█	26.692	29.085	28.249	28.687	28.628	29.446	29.716	29.621	29.6	29.741	30.184	30.408	30.293	30.52	30.497	30.872	30.995	31.658	32.269	32.08	32.646	32.685	33.24	33.154	33.348	32.72	32.869	33.085	33.519	33.28	32.531	32.526	32.84	33.106	32.88	33.139	33.226	33.793	NA	33.795	NA	NA
us-gaap:Goodwill	█████████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇▇▄▄▁▁▁▁	12.348	12.351	12.056	12.388	12.391	12.379	12.333	12.423	12.284	11.095	10.974	11.023	10.82	10.872	10.646	10.558	10.657	10.68	10.771	10.645	10.706	10.722	10.857	10.911	11.214	11.39	11.459	11.377	11.385	11.302	11.372	11.412	8.911	8.739	6.426	6.412	6.432	6.536	NA	6.457	NA	NA
us-gaap:FiniteLivedIntangibleAssetsNet	▁▂▂▅▅▆▇█	0.728	0.798	0.832	0.985	1.03	1.099	1.154	1.233	NA	NA	NA	NA	0.056	0.142	0.253	0.415	0.581	0.748	0.919	1.073	1.239	1.401	1.574	1.75	1.992	2.217	2.424	2.585	2.779	2.917	3.079	3.302	1.647	1.643	NA	0.0	NA	NA	NA	NA	NA	NA
us-gaap:OtherAssetsNoncurrent	▇▇▇██▇██▇▇▇▂▁▁▁▁▁▁▁▂▂▂▂▂▂▃▃▃▃▃▃▃▂▂▂▂▂▁	11.799	11.887	11.928	13.007	12.646	12.202	12.824	13.02	11.784	10.931	11.147	3.055	1.938	1.961	1.978	2.688	2.135	2.332	2.56	2.746	2.953	3.16	3.44	3.614	3.954	4.386	4.681	4.814	5.042	5.325	5.224	5.606	4.111	3.982	2.791	2.834	2.992	2.62	NA	2.518	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:LiabilitiesCurrent	▄▄▄█▃▄▆▇▃▄▅█▃▃▄▅▂▃▃▅▁▂▃▆▂▃▄▅▂▃▃▅▁▁▂▄▁▂	131.247	137.396	139.375	173.027	126.54	140.064	152.225	165.99	126.737	138.335	147.862	175.437	128.114	129.696	136.084	149.523	111.675	120.794	127.559	140.679	105.537	118.202	126.964	151.764	113.801	128.966	134.366	149.79	116.288	121.154	127.806	145.517	108.065	109.304	118.619	135.015	108.745	115.551	NA	135.651	NA	NA
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	▃▁▂▄▁▃▃▄▅▅▄█▅▄▃▅▃▂▃▅▃▃▃▇▄▄▃▅▂▃▃▆	8.273	5.996	6.345	9.84	5.679	7.808	8.381	9.902	10.66	10.962	9.192	14.818	10.647	9.128	8.168	11.316	7.694	7.315	7.867	10.811	8.31	8.047	8.281	12.872	9.516	9.285	7.859	11.042	7.557	8.052	8.089	12.537	NA	NA	NA	9.724	NA	NA	NA	NA	NA	NA
us-gaap:OtherLiabilitiesCurrent	▄▄▂▇▄▄▅▇▅▅▅█▅▃▃▄▃▂▂▄▂▂▂▅▄▃▃▅▃▂▂▄▃▁▂▃▂▁	32.718	31.776	26.111	39.9	33.802	32.51	34.253	40.348	35.059	35.702	34.83	43.46	33.889	30.451	30.231	33.636	29.558	27.778	26.624	31.535	27.194	27.237	26.866	35.765	31.181	30.504	28.831	34.199	29.414	26.691	26.688	31.415	29.035	24.266	25.965	31.099	28.261	24.908	NA	30.891	NA	NA
us-gaap:ContractWithCustomerLiabilityCurrent	▂▄▅█▁▄▅▇▁▃▅█	85.842	95.049	102.302	118.413	81.893	94.399	104.471	115.253	80.537	91.195	103.369	116.693	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:LongTermDebt	▁▁▁▂▂▂▂▃▃▃▃▄▄▄▄▄▅▅▅▅▆▆▆▆▆▆▇▇▇▇▇███	12.493	12.619	12.745	12.868	12.991	13.111	13.231	13.358	13.476	13.591	13.708	13.825	13.936	14.047	14.158	14.269	14.377	14.47	14.574	14.68	14.781	14.882	14.984	15.086	15.183	15.28	15.377	15.474	15.567	15.659	15.752	15.846	15.944	16.047	NA	16.134	NA	NA	NA	NA	NA	NA
us-gaap:LongTermDebtNoncurrent	▁▁▁▂▂▂▂▃▃▃▃▃▄▄▄▄▄▅▅▅▅▅▆▆▆▆▆▆▇▇▇▇▇▇████	11.955	12.084	12.213	12.341	12.466	12.589	12.712	12.836	12.957	13.075	13.194	13.313	13.427	13.54	13.654	13.767	13.877	13.975	14.082	14.258	14.364	14.469	14.575	14.68	14.782	14.883	14.984	15.085	15.183	15.279	15.376	15.474	15.567	15.659	15.724	15.813	15.9	15.959	NA	16.138	NA	NA
us-gaap:OtherLiabilitiesNoncurrent	▇▇█▆▅▅▄▄▃▄▄▄▃▃▄▄▃▄▃▃▃▃▃▄▄▅▁▅▅▅▆▆▅▅▄▄▄▅	7.582	7.666	8.096	6.759	5.859	5.815	5.004	5.101	4.773	4.943	4.883	5.439	4.817	4.672	5.037	4.914	4.65	5.052	4.387	4.465	4.455	4.2	4.764	5.219	5.205	5.608	3.05	5.733	5.917	5.891	6.967	6.759	6.195	6.095	5.271	5.302	5.381	6.015	NA	5.214	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:StockholdersEquity	▇▆▆▆▇▆██▇▇▇▅▆▆▆▆█▇▇▇▇▇▇▆▂▂▂▂▁▁▁▁▁▁▂▂▂▁	118.116	112.202	113.871	116.065	117.074	115.86	130.272	133.247	126.043	123.59	125.309	105.628	109.229	109.63	111.022	112.686	127.88	125.126	125.348	127.011	123.81	121.563	120.322	111.706	68.963	63.025	63.511	64.205	59.41	57.767	56.488	58.198	60.645	60.529	62.008	62.015	63.081	60.925	NA	56.091	NA	NA
us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA	█████▆▆▆▆▆▆▆▆▆▆▆▆▆▆████▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁	0.017	0.017	0.017	0.017	0.017	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.017	0.017	0.017	0.017	0.016	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	0.014	NA	0.014	NA	NA
us-gaap:AdditionalPaidInCapital	███▇▇▇█▇▇▇▇██▇█▇▇▇▇▇▇▇▇▆▁▁▁▂▂▁▁▁▁▁▁▁▁▁	201.832	198.085	200.126	197.824	197.421	196.312	198.664	196.723	194.292	192.421	196.058	200.456	198.391	196.95	199.069	197.594	196.382	194.943	196.596	195.419	193.836	192.8	194.039	185.546	147.804	146.898	149.685	150.837	150.962	150.519	150.46	149.777	148.95	148.601	149.065	148.993	148.271	147.691	NA	146.898	NA	NA
us-gaap:RetainedEarningsAccumulatedDeficit	▂▁▂▂▂▃▆▆▆▅▅▁▂▃▃▄▇▇▇██▇▇▇▆▆▆▆▅▅▅▆▆▆▆▆▆▆	-71.676	-73.438	-72.05	-70.209	-69.204	-67.903	-53.266	-48.485	-52.047	-53.655	-53.396	-75.559	-69.041	-67.534	-65.029	-61.127	-44.637	-45.767	-45.041	-40.983	-42.675	-43.948	-44.215	-43.465	-49.294	-53.266	-52.661	-51.472	-54.718	-55.399	-54.978	-52.468	-48.989	-49.344	-48.568	-48.974	-51.482	-53.034	NA	-54.438	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax	▄▃▁▅▆▆▆▆▄▆▆▇▆▇▅▅▅▅▅▄▅▅▆▆█▇▇▇▆▆▆▅▃▃▃▂▄▄	-8.988	-9.393	-11.0	-8.345	-7.939	-7.626	-7.924	-7.661	-8.838	-7.664	-7.338	-6.828	-7.602	-6.859	-7.991	-8.631	-8.388	-8.369	-8.123	-8.729	-8.556	-8.09	-7.345	-7.418	-6.292	-7.165	-6.819	-6.958	-7.906	-7.645	-7.663	-8.036	-9.428	-9.984	-9.909	-10.054	-9.104	-8.844	NA	-8.317	NA	NA
us-gaap:TreasuryStockValue	▁▁▁▁▁▁▂▂▂▂▃▃▃▃▄▄▄▄▅▅▅▅▆▆▆▆▇▇▇████▇▇▇▆▆	3.073	3.073	3.226	3.226	3.225	4.943	7.222	7.35	7.384	7.532	10.035	12.461	12.539	12.947	15.047	15.17	15.497	15.701	18.104	18.717	18.816	19.22	22.178	22.977	23.273	23.46	26.712	28.22	28.946	29.726	31.349	31.093	29.906	28.762	28.598	27.968	24.622	24.906	NA	28.07	NA	NA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	▇█▂▄▄▅▂▃▁▆▁	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:NetCashProvidedByUsedInOperatingActivities	▄▅▇▆▁▃█▅▅▅▄▆▂▃▆█	3.202	5.112	10.912	9.296	-6.477	-0.017	14.195	3.89	5.971	5.361	3.785	7.574	-4.794	-0.244	7.882	13.209	NA	NA	NA	NA	NA	NA	NA	NA	-0.434	2.287	3.178	12.565	-1.474	0.776	12.273	5.316	-0.65	6.286	5.087	8.396	-0.255	7.796	5.511	9.845	2.364	NA
us-gaap:NetCashProvidedByUsedInInvestingActivities	█▆▅▄▇▂▅▃▁▄▅▅▅▅▆▅	0.643	-0.662	-1.289	-1.698	0.227	-2.941	-1.3	-2.6	-3.668	-1.718	-1.272	-1.273	-1.345	-1.256	-0.795	-1.131	NA	NA	NA	NA	NA	NA	NA	NA	-1.856	-0.97	-0.626	-0.929	-1.066	-1.937	-1.18	-3.76	-0.682	-6.15	-0.789	-1.301	-0.773	-1.295	-0.778	-0.614	-0.382	NA
us-gaap:NetCashProvidedByUsedInFinancingActivities	▇▁▇▄▇▂█▇▇▁▄▇▆▃█▇	-1.63	-7.444	-1.683	-4.127	-1.638	-6.153	-0.357	-1.531	-1.619	-7.346	-4.195	-1.568	-1.919	-5.379	-0.299	-1.792	NA	NA	NA	NA	NA	NA	NA	NA	-1.455	-3.993	-1.002	-1.59	-1.486	-2.691	-1.809	-6.696	-3.431	-3.408	-3.106	-4.881	-1.682	-0.715	-0.447	0.353	-0.894	NA
us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease		NA	NA	3.437	2.902	-7.953	-9.222	11.577	1.333	-1.448	-4.861	-2.634	6.996	-9.175	-4.146	8.266	9.393	0.981	-5.17	2.147	11.11	-3.464	-0.779	10.338	49.115	-3.928	-2.886	2.241	10.185	-3.596	-4.386	8.772	-4.693	-4.141	-4.51	1.426	1.872	-3.783	5.427	6.135	9.542	1.971	NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	▄	2.685	NA	NA	NA	-7.953	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:NetCashProvidedByUsedInOperatingActivities	▄▅▇▆▁▃█▅▅▅▄▆▂▃▆█	3.202	5.112	10.912	9.296	-6.477	-0.017	14.195	3.89	5.971	5.361	3.785	7.574	-4.794	-0.244	7.882	13.209	NA	NA	NA	NA	NA	NA	NA	NA	-0.434	2.287	3.178	12.565	-1.474	0.776	12.273	5.316	-0.65	6.286	5.087	8.396	-0.255	7.796	5.511	9.845	2.364	NA
us-gaap:NetIncomeLoss	▇▆▆▆▆▂▅▇▇▆▆▄▆▅▅▁▆▆▅▇▇▆▆█▇▆▆▇▆▆▅▆▆▆▆▇▇▇▆▆▆▆	3.213	0.06	-0.41	0.41	0.125	-13.25	-3.234	4.936	2.982	1.113	1.397	-5.172	-0.161	-1.161	-2.571	-15.159	1.533	0.6	-2.742	4.146	2.586	1.631	0.549	6.947	5.09	0.985	-0.076	4.346	2.049	1.254	-1.263	2.011	1.825	0.959	1.844	3.684	3.01	3.07	1.02	1.943	1.673	0.315
us-gaap:IncreaseDecreaseInAccountsReceivable	▅▄▂█▅▄▂█▄▅▃▇▅▄▃▇▄▅▃▇▄▄▃▇▄▅▃▇▅▅▃▇▅▁▆▃▅▅▆▃▅	-2.929	-5.068	-32.458	41.266	-1.154	-7.155	-32.033	35.438	-6.89	-1.49	-25.543	31.647	9.025	-4.86	-23.25	30.635	-6.082	1.018	-21.43	24.713	-4.234	-4.46	-26.823	34.54	-4.828	1.846	-20.322	27.756	1.762	0.102	-28.373	31.281	3.727	-47.885	19.644	-25.132	-0.14	7.064	17.78	-24.974	2.645	NA
us-gaap:IncreaseDecreaseInAccountsPayable	▆▄▃█▃▄▄▄▅▆▁▇▆▅▃▇▅▅▃▇▅▅▂▇▅▆▂▇▄▅▂█▅▅▃▇▅▄▃▇▅	2.313	-0.914	-3.157	4.199	-2.138	-0.532	-1.378	-0.866	-0.023	1.979	-5.459	3.802	1.599	0.699	-3.279	3.744	0.42	-0.367	-3.151	2.672	0.361	-0.018	-4.456	3.937	0.466	1.479	-3.314	3.58	-0.582	0.055	-4.313	4.694	-0.035	0.635	-3.152	3.603	-0.369	-0.647	-2.816	3.569	-0.38	NA
us-gaap:ShareBasedCompensation	██▄▆▆▆▄▅▄▇▄▄▄▅▃▃▃▅▃▃▃▅▂▂▂▃▁▁▂▃▁▁▂▂▁▁▂▂▂▂▂	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106	2.253	2.311	2.592	1.768	1.802	1.549	2.418	1.554	1.822	1.881	2.431	1.306	1.199	1.209	1.709	0.876	0.966	1.22	1.55	0.944	1.002	1.139	1.428	1.039	1.005	1.228	1.162	1.112	1.104	1.448	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:NetCashProvidedByUsedInInvestingActivities	█▆▅▄▇▂▅▃▁▄▅▅▅▅▆▅	0.643	-0.662	-1.289	-1.698	0.227	-2.941	-1.3	-2.6	-3.668	-1.718	-1.272	-1.273	-1.345	-1.256	-0.795	-1.131	NA	NA	NA	NA	NA	NA	NA	NA	-1.856	-0.97	-0.626	-0.929	-1.066	-1.937	-1.18	-3.76	-0.682	-6.15	-0.789	-1.301	-0.773	-1.295	-0.778	-0.614	-0.382	NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment	▁▁▃▄▂█▃▃▄▃▃▃▃▃▂▃▂▂▃▂▃▂▃▄▆▃▂▂▃▆▃▂▂▄▂▄▂▄▂▁▁	0.408	0.308	1.017	1.42	0.544	2.671	1.036	1.115	1.221	0.911	1.093	1.133	1.016	0.919	0.652	1.101	0.484	0.608	1.074	0.567	0.988	0.513	1.14	1.24	1.864	0.903	0.57	0.813	0.966	1.87	1.13	0.537	0.505	1.344	0.685	1.188	0.624	1.188	0.781	0.428	0.323	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
us-gaap:NetCashProvidedByUsedInFinancingActivities	▇▁▇▄▇▂█▇▇▁▄▇▆▃█▇	-1.63	-7.444	-1.683	-4.127	-1.638	-6.153	-0.357	-1.531	-1.619	-7.346	-4.195	-1.568	-1.919	-5.379	-0.299	-1.792	NA	NA	NA	NA	NA	NA	NA	NA	-1.455	-3.993	-1.002	-1.59	-1.486	-2.691	-1.809	-6.696	-3.431	-3.408	-3.106	-4.881	-1.682	-0.715	-0.447	0.353	-0.894	NA
us-gaap:PaymentsOfDividends	█▇▂▂▁	1.451	1.448	1.431	1.43	1.426	NA	NA	1.374	1.374	NA	NA	1.346	1.346	NA	NA	1.331	1.328	NA	NA	1.313	1.313	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	17000.0	17000.0	17000.0	17000.0	17000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	17000.0	17000.0	17000.0	17000.0	16000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0
Percentage of CommonStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:CommonClassA	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonClassA

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	17	17	17	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14
Percentage of CommonStockSharesIssued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.53738	3.537366	3.537366	3.537326	3.537322	3.537298	3.537283	3.537283	3.537101	3.537029	3.536985	3.536985	3.536952	3.536822	3.536819	3.536816	3.536663	3.536609	3.536609	3.536604	3.536604
Percentage of CommonStockSharesIssued	20.7	20.7	20.8	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.9	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0	25.0

Preferred Stock Shares Authorized

us-gaap:PreferredStockSharesAuthorized

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31	2018-10-31	2018-07-31	2018-01-31	2017-07-31	2017-04-30	2017-01-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0	5000000.0
Percentage of PreferredStockSharesAuthorized	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassA, us-gaap:CommonStock

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31
Value	0.017113	0.017109	17	16	16	16	16	16	16	16	16	16	16	14
Percentage of CommonStockSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB, us-gaap:CommonStock

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31
Value	0.003537	0.003537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	3.537	3.537
Percentage of CommonStockSharesOutstanding	20.7	20.7	20.8	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.3	21.9	25.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:TreasuryStock

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-0.000216	-0.000216	-0.216	-0.332	-0.505	-0.515	-0.517	-0.529	-0.718	-0.892	-1.125	-1.366	-1.61	-1.93	-2.097	-1.804	-1.722	-2.006	-2.298
Percentage of CommonStockSharesOutstanding	-1.3	-1.3	-1.3	-2.0	-3.0	-3.1	-3.1	-3.2	-4.3	-5.4	-6.8	-8.2	-10.0	-13.6	0.0	0.0	0.0	0.0	0.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2018-04-30	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	17	17	17	17	16	16	17	17	17	16	15	15	16	16	15	16	16	16	13	13	12	12	12	12	0.013016	13	13	0.013382	13
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2018-04-30	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	3.387	3.389	3.321	3.398	3.264	3.264	3.433	3.434	3.414	3.214	3.212	3.21	3.301	3.275	3.204	3.286	3.284	3.279	3.265	3.273	3.168	3.235	3.231	3.145	0.00326	3.264	3.287	0.003301	3.294
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding	19.0	19.0	19.4	19.1	19.8	19.9	19.1	19.2	19.2	20.1	20.2	20.3	19.9	20.1	20.5	20.1	20.2	20.4	24.2	24.2	25.1	24.9	25.0	25.3	25.0	25.0	24.9	24.7	24.8

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2018-04-30	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	17	17	17	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15	12	12	12	12	12	12	0.012561	12	12	0.012975	12
Percentage of WeightedAverageNumberOfSharesOutstandingBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2018-04-30	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	3.33	3.321	3.321	3.308	3.264	3.264	3.264	3.263	3.232	3.214	3.212	3.21	3.206	3.205	3.204	3.203	3.201	3.196	3.189	3.181	3.168	3.149	3.145	3.145	0.003157	3.164	3.168	0.003203	3.195
Percentage of WeightedAverageNumberOfSharesOutstandingBasic	19.2	19.3	19.4	19.6	19.8	19.9	20.0	20.1	20.1	20.1	20.2	20.3	20.3	20.4	20.5	20.6	20.7	20.9	24.8	24.9	25.1	25.1	25.2	25.3	25.1	25.0	25.0	24.7	24.8

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:StatementClassOfStock

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	304000.0	340000.0	1845000.0	368000.0	2897000.0	2899000.0	241000.0	351000.0	3366000.0	3219000.0	3036000.0	1135000.0	1027000.0	2807000.0	640000.0	504000.0	326000.0	330000.0	312000.0	2778000.0	2654000.0	2592000.0	2804000.0	2484000.0	2300000.0	2086000.0	2190000.0	2200000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-04-30	2019-07-31	2019-04-30	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	150000.0	278000.0	278000.0	378000.0	384000.0	389000.0	180000.0	151000.0	349000.0	120000.0	95000.0	60000.0	67000.0	40000.0	371000.0	354000.0	370000.0	456000.0	384000.0	300000.0	377000.0	463000.0	500000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8.1	9.6	9.6	11.2	11.9	12.8	15.9	14.7	12.4	18.8	18.8	18.4	20.3	12.8	13.4	13.3	14.3	16.3	15.5	13.0	18.1	21.1	22.7

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareBasic

us-gaap:CommonClassA

Period End	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30
Value	0	-0.02	0.02	0.01	-0.69	-0.17	0.26	0.16	0.06	0.07	-0.28	-0.01	-0.06	-0.14	-0.82	0.08	0.03	-0.15	0.23	0.14	0.09	0.03	0.44	0.33	0.06	-0.01	0.29	0.14	0.08	-0.08	0.13	0.12	0.06	0.12	0.24	0.19	0.2	0.07
Percentage of EarningsPerShareBasic	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30
Value	0	-0.02	0.02	0.01	-0.57	-0.14	0.22	0.13	0.05	0.06	-0.23	-0.01	-0.05	-0.12	-0.68	0.07	0.03	-0.13	0.22	0.12	0.08	0.03	0.37	0.27	0.05	0	0.24	0.11	0.07	-0.07	0.11	0.1	0.05	0.1	0.2	0.16	0.16	0.06
Percentage of EarningsPerShareBasic	0.0	100.0	100.0	100.0	82.6	82.4	84.6	81.2	83.3	85.7	82.1	100.0	83.3	85.7	82.9	87.5	100.0	86.7	95.7	85.7	88.9	100.0	84.1	81.8	83.3	-0.0	82.8	78.6	87.5	87.5	84.6	83.3	83.3	83.3	83.3	84.2	80.0	85.7

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareDiluted

us-gaap:CommonClassA

Period End	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30
Value	0	-0.02	0.02	0.01	-0.69	-0.17	0.24	0.14	0.05	0.07	-0.28	-0.01	-0.06	-0.14	-0.82	0.08	0.03	-0.15	0.19	0.14	0.09	0.03	0.42	0.31	0.06	-0.01	0.27	0.13	0.08	-0.08	0.13	0.12	0.06	0.12	0.23	0.19	0.19	0.06
Percentage of EarningsPerShareDiluted	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30
Value	0	-0.02	0.02	0.01	-0.57	-0.14	0.21	0.12	0.05	0.06	-0.23	-0.01	-0.05	-0.12	-0.68	0.07	0.03	-0.13	0.18	0.12	0.07	0.02	0.36	0.27	0.05	0	0.23	0.11	0.07	-0.07	0.11	0.1	0.05	0.1	0.19	0.15	0.16	0.05
Percentage of EarningsPerShareDiluted	0.0	100.0	100.0	100.0	82.6	82.4	87.5	85.7	100.0	85.7	82.1	100.0	83.3	85.7	82.9	87.5	100.0	86.7	94.7	85.7	77.8	66.7	85.7	87.1	83.3	-0.0	85.2	84.6	87.5	87.5	84.6	83.3	83.3	83.3	82.6	78.9	84.2	83.3

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	76	74	74	78	77	76	78	82	79	84	86	80	76	75	71	73	69	69	65	69	68	71	69	79	74	73	68	73	65	65	61	65	61	60	63	65	60	61	59	62	55	51
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementGeographical

srt:ReportableGeographicalComponents, srt:AsiaPacific

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	9.682	9.571	9.642	10	11	11	11	13	12	12	12	13	12	12	12
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	12.6	12.9	13.0	13.9	15.1	15.4	15.2	16.8	15.5	15.2	14.6	16.1	16.3	17.1	17.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	12.6	12.9	13.0	13.9	15.1	15.4	15.2	16.8	15.5	15.2	14.6	16.1	16.3	17.1	17.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ReportableGeographicalComponents srt:AsiaPacific	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

srt:ReportableGeographicalComponents, srt:LatinAmerica

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	4.265	4.133	4.935	5.278	5.496	5.672	5.981	3.28	4.81	5.483	8.519	6.832	5.617	5.608	4.965
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	5.6	5.6	6.7	6.7	7.1	7.4	7.7	4.0	6.0	6.5	9.9	8.5	7.3	7.4	7.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	5.6	5.6	6.7	6.7	7.1	7.4	7.7	4.0	6.0	6.5	9.9	8.5	7.3	7.4	7.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ReportableGeographicalComponents srt:LatinAmerica	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

srt:ReportableGeographicalComponents, srt:NorthAmerica

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	39	38	37	38	38	36	37	43	39	39	40	35	37	35	33
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	51.4	52.6	49.9	48.8	49.2	48.2	48.3	52.1	50.1	46.5	46.4	44.3	48.5	46.3	46.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	51.4	52.6	49.9	48.8	49.2	48.2	48.3	52.1	50.1	46.5	46.4	44.3	48.5	46.3	46.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ReportableGeographicalComponents srt:NorthAmerica	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

srt:ReportableGeographicalComponents, us-gaap:EMEA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	23	21	22	24	22	22	22	22	22	26	25	25	21	22	20
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	30.4	28.9	30.4	30.6	28.6	29.0	28.8	27.1	28.3	31.8	29.1	31.1	27.9	29.3	29.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	30.4	28.9	30.4	30.6	28.6	29.0	28.8	27.1	28.3	31.8	29.1	31.1	27.9	29.3	29.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ReportableGeographicalComponents us-gaap:EMEA	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

qada:Automotive

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	24	22	24	26	28	26	29	25	31	34	37	29	29	28	26
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	32.4	30.1	32.6	34.1	36.1	35.3	37.3	30.8	39.0	41.0	43.0	36.0	38.0	38.0	37.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	32.4	30.1	32.6	34.1	36.1	35.3	37.3	30.8	39.0	41.0	43.0	36.0	38.0	38.0	37.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:Automotive	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:ConsumerProductsAndFoodAndBeverage

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	12	13	11	11	11	12	11	13	12	13	13	12	11	11	11
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	16.3	18.2	15.9	14.7	14.5	15.9	15.3	16.4	16.0	16.0	16.0	16.0	15.0	15.0	16.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	16.3	18.2	15.9	14.7	14.5	15.9	15.3	16.4	16.0	16.0	16.0	16.0	15.0	15.0	16.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:ConsumerProductsAndFoodAndBeverage	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:HighTechnologyAndIndustrialProducts

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	26	26	26	28	26	26	25	32	23	25	24	27	25	24	22
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	35.2	36.0	36.2	36.0	34.2	34.6	32.7	39.2	30.0	30.0	29.0	34.0	33.0	32.0	32.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	35.2	36.0	36.2	36.0	34.2	34.6	32.7	39.2	30.0	30.0	29.0	34.0	33.0	32.0	32.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:HighTechnologyAndIndustrialProducts	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:LifeSciences

Period End	2020-10-31	2020-07-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	12	11	11	10	11	11	11	10	10	11	10	11	10
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	16.1	15.8	15.3	14.3	14.7	13.5	15.0	13.0	12.0	14.0	14.0	15.0	15.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	16.1	15.8	15.3	14.3	14.7	13.5	15.0	13.0	12.0	14.0	14.0	15.0	15.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:LifeSciences	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:LifeSciencesAndOther

Period End	2020-04-30	2020-01-31	2019-10-31	2019-04-30	2019-01-31	2018-10-31
Value	11	11	11	11	11	11
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	15.3	15.2	15.3	14.7	13.5	15.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	15.3	15.2	15.3	14.7	13.5	15.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:LifeSciencesAndOther	100.0	100.0	100.0	100.0	100.0	100.0

qada:ProfessionalServices

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	14	13	15	15	17	17	18	19	20	25	26	22	20	19	18
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	18.5	18.2	21.2	20.2	22.5	22.8	23.5	23.1	26.0	30.7	31.2	27.3	26.9	26.1	26.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	18.5	18.2	21.2	20.2	22.5	22.8	23.5	23.1	26.0	30.7	31.2	27.3	26.9	26.1	26.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:ProfessionalServices	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:License

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	1.682	3.043	1.221	5.293	3.295	3.516	4.466	9.11	4.631	5.561	6.266	7.171	6.628	6.743	5.265
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	2.2	4.1	1.6	6.7	4.2	4.6	5.7	11.0	5.8	6.6	7.3	8.9	8.6	8.9	7.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	2.2	4.1	1.6	6.7	4.2	4.6	5.7	11.0	5.8	6.6	7.3	8.9	8.6	8.9	7.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:License	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:Maintenance

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	27	26	26	28	29	29	29	30	30	30	31	31	32	31	31
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	35.3	35.8	35.6	36.6	38.2	38.7	38.3	36.9	38.2	36.2	36.5	39.5	42.1	42.1	44.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	35.3	35.8	35.6	36.6	38.2	38.7	38.3	36.9	38.2	36.2	36.5	39.5	42.1	42.1	44.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:Maintenance	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:SubscriptionAndCirculation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	33	31	30	28	27	25	25	24	23	22	21	19	17	17	15
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	44.0	41.9	41.5	36.5	35.1	33.9	32.4	29.1	30.0	26.5	25.0	24.3	22.3	22.9	21.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	44.0	41.9	41.5	36.5	35.1	33.9	32.4	29.1	30.0	26.5	25.0	24.3	22.3	22.9	21.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:SubscriptionAndCirculation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical

srt:AsiaPacific

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	9.682	9.571	9.642	10	11	11	5.981	13	12	12	12	13	12	12	12
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	12.6	12.9	13.0	13.9	15.1	15.4	7.7	16.8	15.5	15.2	14.6	16.1	16.3	17.1	17.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	12.6	12.9	13.0	13.9	15.1	15.4	7.7	16.8	15.5	15.2	14.6	16.1	16.3	17.1	17.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:AsiaPacific	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

srt:LatinAmerica

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	4.265	4.133	4.935	5.278	5.496	5.672	78	3.28	4.81	5.483	8.519	6.832	5.617	5.608	4.965
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	5.6	5.6	6.7	6.7	7.1	7.4	100.0	4.0	6.0	6.5	9.9	8.5	7.3	7.4	7.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	5.6	5.6	6.7	6.7	7.1	7.4	100.0	4.0	6.0	6.5	9.9	8.5	7.3	7.4	7.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:LatinAmerica	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

srt:NorthAmerica

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	39	38	37	38	38	36	22	43	39	39	40	35	37	35	33
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	51.4	52.6	49.9	48.8	49.2	48.2	28.8	52.1	50.1	46.5	46.4	44.3	48.5	46.3	46.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	51.4	52.6	49.9	48.8	49.2	48.2	28.8	52.1	50.1	46.5	46.4	44.3	48.5	46.3	46.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NorthAmerica	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:EMEA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	23	21	22	24	22	22	11	22	22	26	25	25	21	22	20
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	30.4	28.9	30.4	30.6	28.6	29.0	15.2	27.1	28.3	31.8	29.1	31.1	27.9	29.3	29.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	30.4	28.9	30.4	30.6	28.6	29.0	15.2	27.1	28.3	31.8	29.1	31.1	27.9	29.3	29.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:EMEA	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	30	30	32	33	33	36	36	79	37	40	41	83	38	36	34	69	33	32	32	65	31	32	32	33	33	33	31	30	28	28	28	27	26	27	26	26	26	26	26	26	22	21
Percentage of CostOfGoodsAndServicesSold	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	40.0	41.6	43.7	42.3	43.3	47.2	47.3	95.7	46.9	47.8	47.6	103.3	49.5	48.3	48.8	94.4	47.5	47.2	49.1	94.8	45.6	45.8	46.3	42.6	44.7	45.5	45.9	41.8	44.0	44.1	46.2	41.7	43.0	44.3	41.8	40.3	43.1	43.3	43.9	43.0	41.4	41.9

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

qada:ProfessionalServices

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	13	13	14	15	16	18	19	19	20	23	24	23	21	20	18
Percentage of CostOfGoodsAndServicesSold	43.2	42.5	46.1	47.1	48.6	50.3	52.3	24.3	54.7	58.7	59.2	28.0	57.6	56.1	53.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	17.3	17.7	20.1	19.9	21.0	23.7	24.8	23.3	25.7	28.1	28.2	29.0	28.5	27.1	26.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:ProfessionalServices	93.2	97.2	94.8	98.3	93.7	104.2	105.2	100.9	98.8	91.5	90.3	106.0	105.9	103.9	99.5

us-gaap:License

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	0.441	0.565	0.401	0.653	0.51	0.554	0.591	0.942	0.534	0.574	0.664	0.743	0.69	0.828	0.685
Percentage of CostOfGoodsAndServicesSold	1.4	1.8	1.2	2.0	1.5	1.5	1.6	1.2	1.4	1.4	1.6	0.9	1.8	2.3	2.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.6	0.8	0.5	0.8	0.7	0.7	0.8	1.1	0.7	0.7	0.8	0.9	0.9	1.1	1.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:License	26.2	18.6	32.8	12.3	15.5	15.8	13.2	10.3	11.5	10.3	10.6	10.4	10.4	12.3	13.0

us-gaap:Maintenance

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	6.267	6.413	6.744	7.349	7.291	7.459	7.603	7.952	7.716	7.774	7.865	7.872	7.84	7.84	7.694
Percentage of CostOfGoodsAndServicesSold	20.4	20.8	20.8	22.1	21.6	20.7	20.6	10.0	20.7	19.2	19.2	9.4	20.6	21.4	22.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	8.2	8.7	9.1	9.4	9.4	9.8	9.7	9.6	9.7	9.2	9.1	9.7	10.2	10.3	10.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:Maintenance	23.2	24.2	25.5	25.6	24.5	25.2	25.4	26.1	25.4	25.4	25.0	24.7	24.2	24.5	24.1

us-gaap:SubscriptionAndCirculation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	10	10	10	9.591	9.54	9.903	9.417	8.88	8.686	8.334	8.228	7.81	7.605	7.428	7.72
Percentage of CostOfGoodsAndServicesSold	35.0	34.8	31.9	28.9	28.3	27.5	25.5	11.2	23.2	20.6	20.0	9.4	20.0	20.2	22.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	14.0	14.5	14.0	12.2	12.3	13.0	12.1	10.7	10.9	9.9	9.5	9.7	9.9	9.8	10.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:SubscriptionAndCirculation	31.7	34.6	33.6	33.5	34.9	38.3	37.2	36.9	36.4	37.1	38.3	39.7	44.2	42.6	50.3

Gross Profit

us-gaap:GrossProfit

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	46	43	41	45	44	40	41	45	42	44	45	40	38	39	36	40	36	36	33	38	37	38	37	45	40	39	37	42	36	36	33	38	35	33	37	38	34	35	33	35	32	29
Percentage of GrossProfit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	60.0	58.4	56.3	57.7	56.7	52.8	52.7	55.2	53.1	52.2	52.4	50.7	50.5	51.7	51.2	55.2	52.5	52.8	50.9	55.5	54.4	54.2	53.7	57.4	55.3	54.5	54.1	58.2	56.0	55.9	53.8	58.3	57.0	55.7	58.2	59.7	56.9	56.7	56.1	57.0	58.6	58.1

Operating Expenses

us-gaap:OperatingExpenses

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	41	40	42	44	42	44	44	42	39	42	43	43	38	38	37	36	34	37	36	34	33	36	36	37	35	37	36	36	32	34	35	35	32	32	33	32	30	30	30	31	28	28
Percentage of OperatingExpenses	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	54.7	55.3	57.5	57.3	54.9	58.3	56.9	50.9	49.9	50.1	50.3	54.0	50.0	51.0	53.1	49.5	49.2	53.4	55.4	50.3	49.3	51.0	52.6	47.7	47.4	51.7	53.7	50.3	50.2	53.6	56.6	53.4	52.0	53.1	52.0	50.0	49.9	49.2	51.7	51.0	51.7	56.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	14	13	14	13	13	13	13	13	13	13	14	12	12	11	11	10	10	11	11	9.797	10	10	10	10	10	10	11	10	9.817	10	10	9.891	9.697	9.21	9.534	9.177	8.811	9.237	8.483	8.295	8.134	8.819
Percentage of ResearchAndDevelopmentExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	18.5	17.8	18.9	16.9	17.5	18.2	17.9	16.1	16.5	16.0	16.3	15.3	15.7	15.4	16.2	14.4	15.5	16.0	17.0	14.1	15.0	14.9	15.4	12.7	13.7	14.9	16.3	13.7	15.0	16.1	17.5	15.0	15.7	15.1	15.0	14.1	14.5	14.9	14.3	13.3	14.7	17.2

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	10	10	10	10	9.234	10	9.418	8.425	8.095	9.366	9.362	8.849	8.556	9.224	8.593	7.895	7.934	8.521	8.005	7.97	7.676	8.602	8.441	8.216	8.295	9.265	8.904	7.793	7.776	8.431	7.946	7.758	7.654	8.435	8.105	7.364	7.495	7.397	7.713	7.983	7.486	7.727
Percentage of GeneralAndAdministrativeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	13.4	13.9	13.5	13.2	11.9	13.6	12.1	10.2	10.2	11.1	10.9	11.0	11.1	12.1	12.0	10.8	11.4	12.2	12.2	11.5	11.3	12.1	12.2	10.3	11.2	12.7	13.0	10.6	11.8	12.9	12.8	11.8	12.4	13.8	12.7	11.3	12.3	11.9	13.0	12.8	13.5	15.1

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	17	17	18	21	19	20	20	20	18	19	19	22	17	17	17	17	15	17	16	16	15	16	17	19	16	17	16	18	15	15	16	17	14	14	15	16	13	13	14	15	13	12
Percentage of SellingAndMarketingExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	22.7	23.5	25.0	27.1	25.4	26.4	26.8	24.6	23.2	23.1	23.1	27.7	23.0	23.3	24.6	24.1	22.0	24.9	25.9	24.4	22.8	23.8	24.8	24.5	22.2	23.8	24.1	25.7	23.1	24.3	25.9	26.2	23.9	24.2	24.3	24.6	23.0	22.4	24.4	24.8	23.5	23.7

Operating Income Loss

us-gaap:OperatingIncomeLoss

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	4.067	2.313	-0.933	0.351	1.396	-4.173	-3.262	3.564	2.474	1.726	1.809	-2.688	0.43	0.543	-1.359	4.136	2.259	-0.363	-2.939	3.621	3.467	2.323	0.76	7.734	5.889	2.064	0.298	5.833	3.801	1.49	-1.721	3.216	3.08	1.558	3.954	6.323	4.298	4.647	2.624	3.744	3.844	1.088
Percentage of OperatingIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	5.3	3.1	-1.3	0.4	1.8	-5.5	-4.2	4.3	3.1	2.0	2.1	-3.3	0.6	0.7	-1.9	5.6	3.2	-0.5	-4.5	5.2	5.1	3.3	1.1	9.7	8.0	2.8	0.4	7.9	5.8	2.3	-2.8	4.9	5.0	2.6	6.2	9.7	7.1	7.5	4.4	6.0	6.9	2.1

Interest Expense

us-gaap:InterestExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	142000.0	155000.0	150000.0	153000.0	176000.0	148000.0	153000.0	155000.0	177000.0	154000.0	157000.0	161000.0	195000.0	157000.0	156000.0	167000.0	168000.0	161000.0	174000.0	168000.0	171000.0	190000.0	183000.0	213000.0	185000.0	232000.0	181000.0	199000.0	218000.0	209000.0	203000.0	215000.0	159000.0	330000.0	-286000.0	-312000.0	-305000.0	-287000.0	-270000.0	-324000.0	-317000.0	-309000.0
Percentage of InterestExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.2	0.2	0.2	0.2	0.2	0.3	0.2	0.3	0.3	0.3	0.3	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.5	-0.4	-0.5	-0.5	-0.5	-0.5	-0.5	-0.6	-0.6

Interest Paid Net

us-gaap:InterestPaidNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	135000.0	149000.0	144000.0	146000.0	170000.0	145000.0	149000.0	150000.0	153000.0	151000.0	154000.0	193000.0	155000.0	154000.0	149000.0
Percentage of InterestPaidNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	-194000.0	-1871000.0	1232000.0	-8000.0	-386000.0	154000.0	172000.0	-922000.0	636000.0	269000.0	404000.0	-613000.0	413000.0	-1208000.0	-604000.0	460000.0	413000.0	433000.0	-870000.0	286000.0	-61000.0	413000.0	119000.0	1360000.0	-376000.0	-92000.0	446000.0	127000.0	-41000.0	-356000.0	818000.0	287000.0	139000.0	-99000.0
Percentage of OtherNonoperatingIncomeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	-0.3	-2.5	1.7	-0.0	-0.5	0.2	0.2	-1.1	0.8	0.3	0.5	-0.8	0.5	-1.6	-0.8	0.6	0.6	0.6	-1.3	0.4	-0.1	0.6	0.2	2.1	-0.6	-0.2	0.7	0.2	-0.1	-0.6	1.4	0.5	0.3	-0.2

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106	2.253	2.311	2.592	1.768	1.802	1.82	2.418	1.554	1.822	1.881	2.431	1.306	1.199	1.209	1.709	0.876	0.966	1.22	1.55	0.944	1.002	1.139	1.428	1.039	1.005	1.228	1.162
Percentage of AllocatedShareBasedCompensationExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.9	5.3	3.2	3.8	3.7	4.2	3.0	3.0	2.7	4.0	2.4	2.8	3.0	3.4	2.5	2.5	2.6	3.5	2.4	2.6	2.8	3.4	1.9	1.5	1.6	2.3	1.3	1.3	1.9	2.4	1.5	1.5	1.8	2.3	1.6	1.5	2.0	1.9

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

qada:CostOfMaintenanceAndOtherRevenue

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30
Value	0.125	0.12	0.109	0.144	0.143	0.132	0.121	0.139	0.148	0.118	0.092	0.105	0.107	0.095	0.077	0.08	0.08	0.099	0.061	0.069	0.069	0.087	0.046	0.037	0.038	0.048	0.029
Percentage of AllocatedShareBasedCompensationExpense	3.3	3.0	4.5	4.9	4.9	4.1	5.3	5.6	6.9	3.5	4.4	4.7	4.6	3.7	4.4	4.4	4.4	4.1	3.9	3.8	3.7	3.6	3.5	3.1	3.1	2.8	3.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.2	0.2	0.1	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.0	0.1	0.1	0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:CostOfMaintenanceAndOtherRevenue	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

qada:CostOfProfessionalServices

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31
Value	0.449	0.412	0.337	0.371	0.404	0.359	0.322	0.313	0.353	0.327	0.226	0.282	0.309	0.274	0.22	0.23	0.232	0.278	0.173	0.197	0.189	0.234
Percentage of AllocatedShareBasedCompensationExpense	11.9	10.4	14.0	12.5	13.9	11.3	14.0	12.5	16.4	9.7	10.7	12.5	13.4	10.6	12.4	12.8	12.7	11.5	11.1	10.8	10.0	9.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.6	0.6	0.5	0.5	0.5	0.5	0.4	0.4	0.4	0.4	0.3	0.3	0.4	0.4	0.3	0.3	0.3	0.4	0.3	0.3	0.3	0.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:CostOfProfessionalServices	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

qada:CostOfSubscription

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30
Value	0.156	0.139	0.107	0.089	0.084	0.072	0.07	0.07	0.065	0.068	0.049	0.063	0.037	0.036	0.025	0.032	0.032	0.035	0.019	0.021	0.021	0.022	0.012	0.01	0.013	0.014	0.008
Percentage of AllocatedShareBasedCompensationExpense	4.1	3.5	4.4	3.0	2.9	2.3	3.0	2.8	3.0	2.0	2.3	2.8	1.6	1.4	1.4	1.8	1.8	1.4	1.2	1.2	1.1	0.9	0.9	0.8	1.1	0.8	0.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.2	0.2	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax qada:CostOfSubscription	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:GeneralAndAdministrativeExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31
Value	1.641	2.0	0.893	1.356	1.174	1.609	0.984	0.968	0.529	1.904	1.022	1.068	1.099	1.515	0.876	0.903	0.908	1.249	0.831	0.963	1.025	1.369	0.72	0.703	0.702	1.058	0.533	0.551	0.642	0.822
Percentage of AllocatedShareBasedCompensationExpense	43.5	50.6	37.1	45.8	40.4	50.5	42.7	38.7	24.6	56.6	48.5	47.4	47.6	58.4	49.5	50.1	49.9	51.7	53.5	52.9	54.5	56.3	55.1	58.6	58.1	61.9	60.8	57.0	52.6	53.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	2.1	2.7	1.2	1.7	1.5	2.1	1.3	1.2	0.7	2.3	1.2	1.3	1.4	2.0	1.2	1.2	1.3	1.8	1.3	1.4	1.5	1.9	1.0	0.9	0.9	1.4	0.8	0.7	1.0	1.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:GeneralAndAdministrativeExpense	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ResearchAndDevelopmentExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31
Value	0.607	0.56	0.451	0.503	0.492	0.441	0.427	0.45	0.442	0.413	0.315	0.331	0.338	0.304	0.253	0.261	0.262	0.33	0.227	0.235	0.227	0.29	0.148	0.118	0.132	0.176	0.092	0.116	0.16	0.214
Percentage of AllocatedShareBasedCompensationExpense	16.1	14.2	18.8	17.0	16.9	13.8	18.5	18.0	20.6	12.3	15.0	14.7	14.6	11.7	14.3	14.5	14.4	13.6	14.6	12.9	12.1	11.9	11.3	9.8	10.9	10.3	10.5	12.0	13.1	13.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.8	0.8	0.6	0.6	0.6	0.6	0.5	0.5	0.6	0.5	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.5	0.3	0.3	0.3	0.4	0.2	0.1	0.2	0.2	0.1	0.2	0.2	0.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ResearchAndDevelopmentExpense	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:SellingAndMarketingExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31
Value	0.792	0.72	0.508	0.495	0.607	0.575	0.38	0.564	0.611	0.534	0.402	0.404	0.421	0.368	0.317	0.296	0.306	0.427	0.261	0.337	0.35	0.429	0.261	0.203	0.203	0.257	0.127	0.171	0.236	0.283
Percentage of AllocatedShareBasedCompensationExpense	21.0	18.2	21.1	16.7	20.9	18.0	16.5	22.5	28.4	15.9	19.1	17.9	18.2	14.2	17.9	16.4	16.8	17.7	16.8	18.5	18.6	17.6	20.0	16.9	16.8	15.0	14.5	17.7	19.3	18.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	1.0	1.0	0.7	0.6	0.8	0.8	0.5	0.7	0.8	0.6	0.5	0.5	0.5	0.5	0.4	0.4	0.4	0.6	0.4	0.5	0.5	0.6	0.4	0.3	0.3	0.4	0.2	0.2	0.4	0.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:SellingAndMarketingExpense	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	3.839	0.5	0.585	0.764	1.529	-3.378	-2.519	3.174	3.579	2.584	2.58	-3.016	1.088	-0.329	-1.951	4.61	2.688	0.068	-3.811	3.835	3.315	2.633	0.753	7.707	5.924	2.006	-0.052	6.114	3.429	2.163	-1.554	2.921	2.684	1.3	3.385	6.044	4.222	4.862	1.672	3.264	3.528	0.989
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	5.0	0.7	0.8	1.0	2.0	-4.4	-3.2	3.8	4.5	3.1	3.0	-3.7	1.4	-0.4	-2.7	6.3	3.9	0.1	-5.8	5.5	4.9	3.7	1.1	9.7	8.0	2.7	-0.1	8.3	5.2	3.3	-2.5	4.4	4.3	2.1	5.3	9.3	7.0	7.8	2.8	5.2	6.4	1.9

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	-228000.0	-1813000.0	1518000.0	413000.0	133000.0	795000.0	743000.0	-390000.0	1105000.0	858000.0	771000.0	-328000.0	658000.0	-872000.0	-592000.0	474000.0	429000.0	431000.0	-872000.0	214000.0	-152000.0	310000.0	-7000.0	-27000.0	35000.0	-58000.0	-350000.0	281000.0	-372000.0	673000.0	167000.0	-295000.0	-396000.0	-258000.0	569000.0	279000.0	76000.0	-215000.0	952000.0	480000.0	316000.0	99000.0
Percentage of NonoperatingIncomeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	-0.3	-2.4	2.0	0.5	0.2	1.0	1.0	-0.5	1.4	1.0	0.9	-0.4	0.9	-1.1	-0.8	0.6	0.6	0.6	-1.3	0.3	-0.2	0.4	-0.0	-0.0	0.0	-0.1	-0.5	0.4	-0.6	1.0	0.3	-0.4	-0.6	-0.4	0.9	0.4	0.1	-0.3	1.6	0.8	0.6	0.2

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	0.626	0.44	0.995	0.354	1.404	9.872	0.715	-1.762	0.597	1.471	1.183	2.156	1.249	0.832	0.62	19	1.155	-0.532	-1.069	-0.311	0.729	1.002	0.204	0.76	0.834	1.021	0.024	1.768	1.38	0.909	-0.291	0.91	0.859	0.341	1.541	2.36	1.212	1.792	0.652	1.321	1.855	0.674
Percentage of IncomeTaxExpenseBenefit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.8	0.6	1.3	0.5	1.8	12.9	0.9	-2.1	0.8	1.7	1.4	2.7	1.6	1.1	0.9	27.0	1.7	-0.8	-1.6	-0.4	1.1	1.4	0.3	1.0	1.1	1.4	0.0	2.4	2.1	1.4	-0.5	1.4	1.4	0.6	2.4	3.6	2.0	2.9	1.1	2.1	3.3	1.3

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	741000.0	1445000.0	758000.0	705000.0	606000.0	1577000.0	791000.0	917000.0	926000.0	833000.0	799000.0	1096000.0	835000.0	1374000.0	656000.0
Percentage of IncomeTaxesPaidNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	1.0	2.0	1.0	0.9	0.8	2.1	1.0	1.1	1.2	1.0	0.9	1.4	1.1	1.8	0.9

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	3.213	0.06	-0.41	0.41	0.125	-13.25	-3.234	4.936	2.982	1.113	1.397	-5.172	-0.161	-1.161	-2.571	-15.159	1.533	0.6	-2.742	4.146	2.586	1.631	0.549	6.947	5.09	0.985	-0.076	4.346	2.049	1.254	-1.263	2.011	1.825	0.959	1.844	3.684	3.01	3.07	1.02	1.943	1.673	0.315
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.2	0.1	-0.6	0.5	0.2	-17.3	-4.1	6.0	3.7	1.3	1.6	-6.4	-0.2	-1.5	-3.6	-20.7	2.2	0.9	-4.2	6.0	3.8	2.3	0.8	8.7	6.9	1.3	-0.1	5.9	3.1	1.9	-2.0	3.1	3.0	1.6	2.9	5.7	5.0	5.0	1.7	3.1	3.0	0.6

us-gaap:NetIncomeLoss us-gaap:StatementClassOfStock

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	2.77	0.052	-0.353	0.353	0.107	-11.379	-2.774	4.232	2.557	0.954	1.196	-4.43	-0.139	-0.994	-2.199	-12.966	1.311	0.513	-2.341	3.539	2.208	1.392	0.468	5.758	4.218	0.816	-0.064	3.594	1.694	1.036	-1.043	1.661	1.503	0.795	1.524	3.047	2.499	2.544
Percentage of NetIncomeLoss	86.2	86.7	86.1	86.1	85.6	85.9	85.8	85.7	85.7	85.7	85.6	85.7	86.3	85.6	85.5	85.5	85.5	85.5	85.4	85.4	85.4	85.3	85.2	82.9	82.9	82.8	84.2	82.7	82.7	82.6	82.6	82.6	82.4	82.9	82.6	82.7	83.0	82.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	3.6	0.1	-0.5	0.4	0.1	-14.9	-3.6	5.1	3.2	1.1	1.4	-5.5	-0.2	-1.3	-3.1	-17.7	1.9	0.7	-3.6	5.1	3.2	2.0	0.7	7.2	5.7	1.1	-0.1	4.9	2.6	1.6	-1.7	2.5	2.4	1.3	2.4	4.7	4.1	4.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CommonClassA	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	0.443	0.008	-0.057	0.057	0.018	-1.871	-0.46	0.704	0.425	0.159	0.201	-0.742	-0.022	-0.167	-0.372	-2.193	0.222	0.087	-0.401	0.607	0.378	0.239	0.081	1.189	0.872	0.169	-0.012	0.752	0.355	0.218	-0.22	0.35	0.322	0.164	0.32	0.637	0.511	0.526
Percentage of NetIncomeLoss	13.8	13.3	13.9	13.9	14.4	14.1	14.2	14.3	14.3	14.3	14.4	14.3	13.7	14.4	14.5	14.5	14.5	14.5	14.6	14.6	14.6	14.7	14.8	17.1	17.1	17.2	15.8	17.3	17.3	17.4	17.4	17.4	17.6	17.1	17.4	17.3	17.0	17.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.6	0.0	-0.1	0.1	0.0	-2.4	-0.6	0.9	0.5	0.2	0.2	-0.9	-0.0	-0.2	-0.5	-3.0	0.3	0.1	-0.6	0.9	0.6	0.3	0.1	1.5	1.2	0.2	-0.0	1.0	0.5	0.3	-0.4	0.5	0.5	0.3	0.5	1.0	0.8	0.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CommonClassB	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	3.213	0.06	-0.41	0.41	0.125	-13.25	-3.234	4.936	2.982	1.113	1.397
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.2	0.1	-0.6	0.5	0.2	-17.3	-4.1	6.0	3.7	1.3	1.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30
Value	3.618	1.667	-3.065	0.004	-0.188	-12.952	-3.497	6.113	1.808	0.787	0.887	-4.398	-0.904	-0.029	-1.931	-15.402	1.513	0.354	-2.136	3.973	2.12	0.886	0.622	5.821	5.963	0.639	0.063	5.294	1.788	1.272	-0.89	3.403	2.381	0.884	1.989	2.734	2.75	3.113	0.45
Percentage of ComprehensiveIncomeNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.7	2.3	-4.1	0.0	-0.2	-17.0	-4.5	7.4	2.3	0.9	1.0	-5.4	-1.2	-0.0	-2.7	-21.0	2.2	0.5	-3.3	5.7	3.1	1.2	0.9	7.3	8.1	0.9	0.1	7.2	2.7	2.0	-1.4	5.2	3.9	1.4	3.1	4.2	4.5	5.0	0.8

Assets

us-gaap:Assets

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	284	285	286	322	275	288	311	317	270	279	291	299	255	257	265	280	258	264	271	286	248	258	266	283	202	212	215	234	196	200	206	225	190	191	201	218	193	198	213
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Liabilities

us-gaap:Liabilities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-01-31
Value	166	173	173	206	157	183
Percentage of Liabilities	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	58.5	60.8	60.3	64.0	57.4	58.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	284	285	286	322	275	288	311	317	270	279	291	299	255	257	265	280	258	264	271	286	248	258	266	283	202	212	215	234	196	200	206	225	190	191	201	218	193	198	213
Percentage of LiabilitiesAndStockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31	2010-01-31	2009-01-31
Value	118	112	113	116	117	115	130	133	126	123	125	105	109	109	111	112	127	125	125	127	123	121	120	111	68	63	63	64	59	57	56	58	60	60	62	62	63	60	56	49	47
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	41.5	39.2	39.7	36.0	42.6	40.2	41.8	42.0	46.6	44.1	43.0	35.2	42.7	42.6	41.8	40.1	49.6	47.2	46.2	44.3	49.9	47.0	45.1	39.4	34.0	29.7	29.4	27.3	30.2	28.9	27.3	25.8	31.8	31.6	30.8	28.4	32.7	30.7	26.3	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31
Value	0.017	0.017	0.017	0.017	0.017	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.014
Percentage of StockholdersEquity	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-8.988	-9.393	-11.0	-8.345	-7.939	-7.626	-7.924	-7.661	-8.838	-7.664	-7.338	-6.828	-8.631	-8.729	-7.418	-6.958	-8.036	-10.054	-8.317	-8.85	-6.777
Percentage of StockholdersEquity	-7.6	-8.4	-9.7	-7.2	-6.8	-6.6	-6.1	-5.7	-7.0	-6.2	-5.9	-6.5	-7.7	-6.9	-6.6	-10.8	-13.8	-16.2	-14.8	-17.9	-14.3
Percentage of Assets	-3.2	-3.3	-3.8	-2.6	-2.9	-2.6	-2.5	-2.4	-3.3	-2.7	-2.5	-2.3	-3.1	-3.0	-2.6	-3.0	-3.6	-4.6	-3.9	0.0	0.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-01-31	2016-01-31
Value	-8.988	-9.393	-11.0	-8.345	-7.939	-7.626	-7.661	-8.838	-7.664	-7.338	-6.828	-7.602	-6.859	-8.631	-8.729
Percentage of StockholdersEquity	-7.6	-8.4	-9.7	-7.2	-6.8	-6.6	-5.7	-7.0	-6.2	-5.9	-6.5	-7.0	-6.3	-7.7	-6.9
Percentage of Assets	-3.2	-3.3	-3.8	-2.6	-2.9	-2.6	-2.4	-3.3	-2.7	-2.5	-2.3	-3.0	-2.7	-3.1	-3.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	201	198	200	197	197	196	198	196	194	192	196	200	197	195	185	150	149	148	146	143	139
Percentage of StockholdersEquity	170.9	176.5	175.7	170.4	168.6	169.4	152.5	147.6	154.1	155.7	156.5	189.8	175.3	153.9	166.1	234.9	257.4	240.3	261.9	288.9	294.8
Percentage of Assets	70.8	69.3	69.7	61.3	71.8	68.1	63.8	62.0	71.8	68.7	67.3	66.9	70.3	68.2	65.5	64.2	66.3	68.3	68.9	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-71.676	-73.438	-72.05	-70.209	-69.204	-67.903	-53.266	-48.485	-52.047	-53.655	-53.396	-75.559	-61.127	-40.983	-43.465	-51.472	-52.468	-48.974	-54.438	-52.48	-49.103
Percentage of StockholdersEquity	-60.7	-65.5	-63.3	-60.5	-59.1	-58.6	-40.9	-36.4	-41.3	-43.4	-42.6	-71.5	-54.2	-32.3	-38.9	-80.2	-90.2	-79.0	-97.1	-105.9	-103.4
Percentage of Assets	-25.2	-25.7	-25.1	-21.7	-25.2	-23.5	-17.1	-15.3	-19.2	-19.2	-18.3	-25.2	-21.8	-14.3	-15.3	-21.9	-23.2	-22.5	-25.5	0.0	0.0
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:TreasuryStock

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-3.073	-3.073	-3.226	-3.226	-3.225	-4.943	-7.222	-7.35	-7.384	-7.532	-10.035	-12.461	-15.17	-18.717	-22.977	-28.22	-31.093	-27.968	-28.07	-32.275	-36.614
Percentage of StockholdersEquity	-2.6	-2.7	-2.8	-2.8	-2.8	-4.3	-5.5	-5.5	-5.9	-6.1	-8.0	-11.8	-13.5	-14.7	-20.6	-44.0	-53.4	-45.1	-50.0	-65.1	-77.1
Percentage of Assets	-1.1	-1.1	-1.1	-1.0	-1.2	-1.7	-2.3	-2.3	-2.7	-2.7	-3.4	-4.2	-5.4	-6.5	-8.1	-12.0	-13.8	-12.8	-13.2	0.0	0.0
Percentage of Assets us-gaap:TreasuryStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Assets Current

us-gaap:AssetsCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	205	203	210	242	196	207	223	244	203	214	224	246	204	206	215	229	200	206	212	227	189	199	206	223	141	149	153	170	127	130	136	155	124	125	140	157	129	134	149
Percentage of AssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	72.2	71.3	73.3	75.2	71.5	72.1	71.8	77.0	75.4	76.8	77.2	82.2	80.0	80.0	81.1	81.8	77.7	78.1	78.2	79.4	76.4	77.2	77.6	78.9	69.9	70.6	71.0	72.6	64.8	65.1	66.1	69.0	65.5	65.8	69.9	72.4	67.2	67.9	70.1

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31	2010-01-31	2009-01-31
Value	143	140	140	136	133	141	150	139	138	139	144	147	140	149	153	145	135	134	139	137	126	130	130	120	71	75	78	75	65	69	73	65	69	73	78	76	75	78	73	67	57	55	44	31
Percentage of CashAndCashEquivalentsAtCarryingValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	50.3	49.2	48.8	42.4	48.6	49.2	48.5	44.0	51.0	49.8	49.6	49.0	54.8	57.9	57.7	51.7	52.6	50.8	51.5	48.1	51.0	50.3	49.1	42.5	35.2	35.5	36.2	32.4	33.4	34.7	35.7	28.8	36.6	38.5	38.9	35.3	38.9	39.7	0.0	31.6	0.0	0.0	0.0	0.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31
Value	18	18	17	14	25	35	31	31	32	35	32	25	28	31	29	25	23	27	24
Percentage of CashAndCashEquivalentsAtCarryingValue	12.8	13.1	12.6	10.6	19.4	24.7	21.0	22.7	22.9	24.2	21.8	17.9	18.8	20.2	20.0	18.4	17.1	19.3	17.4
Percentage of Assets	6.5	6.5	6.2	4.5	9.4	12.1	10.2	10.0	11.4	12.0	10.7	9.8	10.9	11.7	10.3	9.7	8.7	9.9	8.4
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	39	42	46	80	39	41	49	81	46	54	56	83	50	42	46	69	39	45	44	65	41	45	51	78	46	52	51	71	44	42	43	72	40	36	45	64	40	41	65
Percentage of AccountsReceivableNetCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	13.8	14.8	16.2	25.1	14.5	14.4	15.7	25.7	17.2	19.4	19.5	27.9	19.9	16.5	17.4	24.7	15.2	17.2	16.5	22.9	16.6	17.8	19.2	27.8	22.9	24.8	23.8	30.4	22.6	21.4	20.9	32.1	21.1	19.0	22.4	29.7	21.2	21.0	30.8

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-01-31
Value	23	20	23	24	22	23	22	22	19	21	23	15	13	14	15	15	16	13	14	15	14	15	13	15	14	12	13	15	13	11
Percentage of PrepaidExpenseAndOtherAssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	8.2	7.3	8.2	7.7	8.4	8.1	7.2	7.0	7.2	7.5	8.1	5.3	5.3	5.6	6.0	5.5	5.6	5.3	5.7	5.8	5.2	7.8	6.4	7.1	6.4	6.6	6.9	7.3	6.1	5.4

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31
Value	41	41	39	38	38	40	39	37	33	32	31	42	43	43
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	14.5	14.5	13.9	12.0	14.0	13.9	12.4	12.5	12.0	11.5	11.1	17.9	19.3	20.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	65000.0	65000.0	64000.0	68000.0	67000.0	66000.0	67000.0	66000.0	45000.0	57000.0	85000.0	111000.0	163000.0	163000.0	165000.0	166000.0	165000.0	163000.0	165000.0	166000.0	164000.0	171000.0	176000.0	179000.0	180000.0	179000.0	178000.0	177000.0	176000.0	119000.0	88000.0	57000.0	0	0	0	0
Percentage of AmortizationOfIntangibleAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	26	29	28	28	28	29	29	29	29	29	30	30	30	30	30	30	30	31	32	32	32	32	33	33	33	32	32	33	33	33	32	32	32	33	32	33	33	33	33
Percentage of PropertyPlantAndEquipmentNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	9.4	10.2	9.8	8.9	10.4	10.2	9.5	9.3	10.9	10.6	10.4	10.1	11.9	11.9	11.5	11.0	12.0	11.9	11.9	11.2	13.2	12.6	12.5	11.7	16.4	15.4	15.2	14.1	17.0	16.6	15.7	14.4	17.2	17.3	16.3	15.2	17.2	17.0	15.9

Goodwill

us-gaap:Goodwill

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	12	12	12	12	12	12	12	12	12	11	10	11	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	8.911	8.739	6.426	6.412	6.432	6.536	6.457
Percentage of Goodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.3	4.3	4.2	3.8	4.5	4.3	4.0	3.9	4.5	4.0	3.8	3.7	4.2	4.2	4.0	3.8	4.1	4.0	4.0	3.7	4.3	4.1	4.1	3.9	5.5	5.4	5.3	4.8	5.8	5.6	5.5	5.1	4.7	4.6	3.2	2.9	3.3	3.3	3.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31
Value	728000.0	798000.0	832000.0	985000.0	1030000.0	1099000.0	1154000.0	1233000.0	56000.0	142000.0	253000.0	415000.0	581000.0	748000.0	919000.0	1073000.0	1239000.0	1401000.0	1574000.0	1750000.0	1992000.0	2217000.0	2424000.0	2585000.0	2779000.0	2917000.0	3079000.0	3302000.0	1647000.0	1643000.0	0
Percentage of FiniteLivedIntangibleAssetsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0
Percentage of Assets	0.3	0.3	0.3	0.3	0.4	0.4	0.4	0.4	0.0	0.1	0.1	0.1	0.2	0.3	0.3	0.4	0.5	0.5	0.6	0.6	1.0	1.0	1.1	1.1	1.4	1.5	1.5	1.5	0.9	0.9	0.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	11	11	11	13	12	12	12	13	11	10	11	3.055	1.938	1.961	1.978	2.688	2.135	2.332	2.56	2.746	2.953	3.16	3.44	3.614	3.954	4.386	4.681	4.814	5.042	5.325	5.224	5.606	4.111	3.982	2.791	2.834	2.992	2.62	2.518
Percentage of OtherAssetsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.1	4.2	4.2	4.0	4.6	4.2	4.1	4.1	4.4	3.9	3.8	1.0	0.8	0.8	0.7	1.0	0.8	0.9	0.9	1.0	1.2	1.2	1.3	1.3	2.0	2.1	2.2	2.1	2.6	2.7	2.5	2.5	2.2	2.1	1.4	1.3	1.5	1.3	1.2

Liabilities Current

us-gaap:LiabilitiesCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	131	137	139	173	126	140	152	165	126	138	147	175	128	129	136	149	111	120	127	140	105	118	126	151	113	128	134	149	116	121	127	145	108	109	118	135	108	115	135
Percentage of LiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	46.1	48.0	48.6	53.6	46.0	48.6	48.9	52.3	46.9	49.4	50.8	58.5	50.1	50.4	51.2	53.2	43.3	45.6	47.0	49.1	42.5	45.7	47.6	53.6	56.1	60.7	62.2	63.8	59.1	60.5	61.9	64.4	56.7	57.1	58.8	61.9	56.3	58.2	63.7

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-01-31
Value	8.273	5.996	6.345	9.84	5.679	7.808	8.381	9.902	10	10	9.192	14	10	9.128	8.168	11	7.694	7.315	7.867	10	8.31	8.047	8.281	12	9.516	9.285	7.859	11	7.557	8.052	8.089	12	9.724
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.9	2.1	2.2	3.0	2.1	2.7	2.7	3.1	3.9	3.9	3.2	4.9	4.2	3.5	3.1	4.0	3.0	2.8	2.9	3.8	3.3	3.1	3.1	4.5	4.7	4.4	3.6	4.7	3.8	4.0	3.9	5.5	4.5

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	32	31	26	39	33	32	34	40	35	35	34	43	33	30	30	33	29	27	26	31	27	27	26	35	31	30	28	34	29	26	26	31	29	24	25	31	28	24	30
Percentage of OtherLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	11.5	11.1	9.1	12.4	12.3	11.3	11.0	12.7	13.0	12.8	12.0	14.5	13.3	11.8	11.4	12.0	11.5	10.5	9.8	11.0	11.0	10.5	10.1	12.6	15.4	14.4	13.4	14.6	14.9	13.3	12.9	13.9	15.2	12.7	12.9	14.3	14.6	12.6	14.5

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	85	95	102	118	81	94	104	115	80	91	103	116
Percentage of ContractWithCustomerLiabilityCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	30.1	33.2	35.7	36.7	29.8	32.7	33.5	36.3	29.8	32.6	35.5	38.9

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService

qada:LicenseAndOther

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-01-31
Value	0.085	0.047	0.137	0.356	2.05
Percentage of ContractWithCustomerLiabilityCurrent	0.1	0.0	0.1	0.3	1.8
Percentage of Assets	0.0	0.0	0.0	0.1	0.6
Percentage of Assets qada:LicenseAndOther	0.0	0.0	0.0	0.0	0.0

qada:ProfessionalServices

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	2.393	2.096	2.483	2.705	1.73	1.849	2.02	2.146	1.811	1.589	2.297	3.523
Percentage of ContractWithCustomerLiabilityCurrent	2.8	2.2	2.4	2.3	2.1	2.0	1.9	1.9	2.2	1.7	2.2	3.0
Percentage of Assets	0.8	0.7	0.9	0.8	0.6	0.6	0.6	0.7	0.7	0.6	0.8	1.2
Percentage of Assets qada:ProfessionalServices	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Maintenance

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	42	51	58	69	47	59	68	77	50	61	72	80
Percentage of ContractWithCustomerLiabilityCurrent	49.2	54.5	57.1	58.8	57.5	63.2	65.5	66.8	63.0	67.6	69.8	69.3
Percentage of Assets	14.8	18.1	20.4	21.6	17.1	20.7	22.0	24.3	18.7	22.0	24.8	27.0
Percentage of Assets us-gaap:Maintenance	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:SubscriptionAndCirculation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	41	41	41	45	32	32	33	34	27	27	28	31
Percentage of ContractWithCustomerLiabilityCurrent	47.9	43.3	40.3	38.6	40.0	34.7	31.8	29.5	34.5	30.5	27.6	26.6
Percentage of Assets	14.4	14.4	14.4	14.2	11.9	11.4	10.7	10.7	10.3	9.9	9.8	10.4
Percentage of Assets us-gaap:SubscriptionAndCirculation	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Long Term Debt

us-gaap:LongTermDebt

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31
Value	12	12	12	12	12	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	16	16
Percentage of LongTermDebt	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.4	4.4	4.4	4.0	4.7	4.5	4.2	4.2	5.0	4.9	4.7	4.6	5.5	5.5	5.3	5.1	5.6	5.5	5.4	5.1	6.0	5.8	5.6	5.3	7.5	7.2	7.1	6.6	7.9	7.8	7.6	7.0	8.4	8.4	7.4

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	11	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	16
Percentage of LongTermDebtNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.2	4.2	4.3	3.8	4.5	4.4	4.1	4.0	4.8	4.7	4.5	4.4	5.3	5.3	5.1	4.9	5.4	5.3	5.2	5.0	5.8	5.6	5.5	5.2	7.3	7.0	6.9	6.4	7.7	7.6	7.4	6.8	8.2	8.2	7.8	7.2	8.2	8.0	7.6

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	7582000.0	7666000.0	8096000.0	6759000.0	5859000.0	5815000.0	5004000.0	5101000.0	4773000.0	4943000.0	4883000.0	5439000.0	4817000.0	4672000.0	5037000.0	4914000.0	4650000.0	5052000.0	4387000.0	4465000.0	4455000.0	4200000.0	4764000.0	5219000.0	5205000.0	5608000.0	3050000.0	5733000.0	5917000.0	5891000.0	6967000.0	6759000.0	6195000.0	6095000.0	5271000.0	5302000.0	5381000.0	6015000.0	5214000.0
Percentage of OtherLiabilitiesNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.7	2.7	2.8	2.1	2.1	2.0	1.6	1.6	1.8	1.8	1.7	1.8	1.9	1.8	1.9	1.7	1.8	1.9	1.6	1.6	1.8	1.6	1.8	1.8	2.6	2.6	1.4	2.4	3.0	2.9	3.4	3.0	3.3	3.2	2.6	2.4	2.8	3.0	2.4

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31	2010-01-31	2009-01-31
Value	118	112	113	116	117	115	130	133	126	123	125	105	109	109	111	112	127	125	125	127	123	121	120	111	68	63	63	64	59	57	56	58	60	60	62	62	63	60	56	49	47
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	41.5	39.2	39.7	36.0	42.6	40.2	41.8	42.0	46.6	44.1	43.0	35.2	42.7	42.6	41.8	40.1	49.6	47.2	46.2	44.3	49.9	47.0	45.1	39.4	34.0	29.7	29.4	27.3	30.2	28.9	27.3	25.8	31.8	31.6	30.8	28.4	32.7	30.7	26.3	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31
Value	0.017	0.017	0.017	0.017	0.017	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.016	0.014
Percentage of StockholdersEquity	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-8.988	-9.393	-11.0	-8.345	-7.939	-7.626	-7.924	-7.661	-8.838	-7.664	-7.338	-6.828	-8.631	-8.729	-7.418	-6.958	-8.036	-10.054	-8.317	-8.85	-6.777
Percentage of StockholdersEquity	-7.6	-8.4	-9.7	-7.2	-6.8	-6.6	-6.1	-5.7	-7.0	-6.2	-5.9	-6.5	-7.7	-6.9	-6.6	-10.8	-13.8	-16.2	-14.8	-17.9	-14.3
Percentage of Assets	-3.2	-3.3	-3.8	-2.6	-2.9	-2.6	-2.5	-2.4	-3.3	-2.7	-2.5	-2.3	-3.1	-3.0	-2.6	-3.0	-3.6	-4.6	-3.9	0.0	0.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-01-31	2016-01-31
Value	-8.988	-9.393	-11.0	-8.345	-7.939	-7.626	-7.661	-8.838	-7.664	-7.338	-6.828	-7.602	-6.859	-8.631	-8.729
Percentage of StockholdersEquity	-7.6	-8.4	-9.7	-7.2	-6.8	-6.6	-5.7	-7.0	-6.2	-5.9	-6.5	-7.0	-6.3	-7.7	-6.9
Percentage of Assets	-3.2	-3.3	-3.8	-2.6	-2.9	-2.6	-2.4	-3.3	-2.7	-2.5	-2.3	-3.0	-2.7	-3.1	-3.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	201	198	200	197	197	196	198	196	194	192	196	200	197	195	185	150	149	148	146	143	139
Percentage of StockholdersEquity	170.9	176.5	175.7	170.4	168.6	169.4	152.5	147.6	154.1	155.7	156.5	189.8	175.3	153.9	166.1	234.9	257.4	240.3	261.9	288.9	294.8
Percentage of Assets	70.8	69.3	69.7	61.3	71.8	68.1	63.8	62.0	71.8	68.7	67.3	66.9	70.3	68.2	65.5	64.2	66.3	68.3	68.9	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-71.676	-73.438	-72.05	-70.209	-69.204	-67.903	-53.266	-48.485	-52.047	-53.655	-53.396	-75.559	-61.127	-40.983	-43.465	-51.472	-52.468	-48.974	-54.438	-52.48	-49.103
Percentage of StockholdersEquity	-60.7	-65.5	-63.3	-60.5	-59.1	-58.6	-40.9	-36.4	-41.3	-43.4	-42.6	-71.5	-54.2	-32.3	-38.9	-80.2	-90.2	-79.0	-97.1	-105.9	-103.4
Percentage of Assets	-25.2	-25.7	-25.1	-21.7	-25.2	-23.5	-17.1	-15.3	-19.2	-19.2	-18.3	-25.2	-21.8	-14.3	-15.3	-21.9	-23.2	-22.5	-25.5	0.0	0.0
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:TreasuryStock

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31	2010-01-31	2009-01-31
Value	-3.073	-3.073	-3.226	-3.226	-3.225	-4.943	-7.222	-7.35	-7.384	-7.532	-10.035	-12.461	-15.17	-18.717	-22.977	-28.22	-31.093	-27.968	-28.07	-32.275	-36.614
Percentage of StockholdersEquity	-2.6	-2.7	-2.8	-2.8	-2.8	-4.3	-5.5	-5.5	-5.9	-6.1	-8.0	-11.8	-13.5	-14.7	-20.6	-44.0	-53.4	-45.1	-50.0	-65.1	-77.1
Percentage of Assets	-1.1	-1.1	-1.1	-1.0	-1.2	-1.7	-2.3	-2.3	-2.7	-2.7	-3.4	-4.2	-5.4	-6.5	-8.1	-12.0	-13.8	-12.8	-13.2	0.0	0.0
Percentage of Assets us-gaap:TreasuryStock	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	17000.0	17000.0	17000.0	17000.0	17000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	16000.0	17000.0	17000.0	17000.0	17000.0	16000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0	14000.0
Percentage of CommonStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:CommonClassA	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	201	198	200	197	197	196	198	196	194	192	196	200	198	196	199	197	196	194	196	195	193	192	194	185	147	146	149	150	150	150	150	149	148	148	149	148	148	147	146
Percentage of AdditionalPaidInCapital	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	70.8	69.3	69.7	61.3	71.8	68.1	63.8	62.0	71.8	68.7	67.3	66.9	77.6	76.5	74.9	70.3	76.1	73.6	72.4	68.2	78.1	74.6	72.8	65.5	72.9	69.1	69.3	64.2	76.7	75.2	72.8	66.3	78.2	77.6	73.9	68.3	76.8	74.4	68.9

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	-71.676	-73.438	-72.05	-70.209	-69.204	-67.903	-53.266	-48.485	-52.047	-53.655	-53.396	-75.559	-69.041	-67.534	-65.029	-61.127	-44.637	-45.767	-45.041	-40.983	-42.675	-43.948	-44.215	-43.465	-49.294	-53.266	-52.661	-51.472	-54.718	-55.399	-54.978	-52.468	-48.989	-49.344	-48.568	-48.974	-51.482	-53.034	-54.438
Percentage of RetainedEarningsAccumulatedDeficit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-25.2	-25.7	-25.1	-21.7	-25.2	-23.5	-17.1	-15.3	-19.2	-19.2	-18.3	-25.2	-27.0	-26.2	-24.5	-21.8	-17.3	-17.3	-16.6	-14.3	-17.2	-17.0	-16.6	-15.3	-24.3	-25.1	-24.4	-21.9	-27.8	-27.7	-26.6	-23.2	-25.7	-25.8	-24.1	-22.5	-26.7	-26.7	-25.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	-8988000.0	-9393000.0	-11000000.0	-8345000.0	-7939000.0	-7626000.0	-7924000.0	-7661000.0	-8838000.0	-7664000.0	-7338000.0	-6828000.0	-7602000.0	-6859000.0	-7991000.0	-8631000.0	-8388000.0	-8369000.0	-8123000.0	-8729000.0	-8556000.0	-8090000.0	-7345000.0	-7418000.0	-6292000.0	-7165000.0	-6819000.0	-6958000.0	-7906000.0	-7645000.0	-7663000.0	-8036000.0	-9428000.0	-9984000.0	-9909000.0	-10054000.0	-9104000.0	-8844000.0	-8317000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-3.2	-3.3	-3.8	-2.6	-2.9	-2.6	-2.5	-2.4	-3.3	-2.7	-2.5	-2.3	-3.0	-2.7	-3.0	-3.1	-3.3	-3.2	-3.0	-3.0	-3.4	-3.1	-2.8	-2.6	-3.1	-3.4	-3.2	-3.0	-4.0	-3.8	-3.7	-3.6	-4.9	-5.2	-4.9	-4.6	-4.7	-4.5	-3.9

Treasury Stock Value

us-gaap:TreasuryStockValue

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	3.073	3.073	3.226	3.226	3.225	4.943	7.222	7.35	7.384	7.532	10	12	12	12	15	15	15	15	18	18	18	19	22	22	23	23	26	28	28	29	31	31	29	28	28	27	24	24	28
Percentage of TreasuryStockValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.1	1.1	1.1	1.0	1.2	1.7	2.3	2.3	2.7	2.7	3.4	4.2	4.9	5.0	5.7	5.4	6.0	5.9	6.7	6.5	7.6	7.4	8.3	8.1	11.5	11.0	12.4	12.0	14.7	14.9	15.2	13.8	15.7	15.0	14.2	12.8	12.8	12.6	13.2

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	3.202	5.112	10	9.296	-6.477	-0.017	14	3.89	5.971	5.361	3.785	7.574	-4.794	-0.244	7.882	13	-0.434	2.287	3.178	12	-1.474	0.776	12	5.316	-0.65	6.286	5.087	8.396	-0.255	7.796	5.511	9.845	2.364
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.2	6.9	14.7	11.8	-8.3	-0.0	18.2	4.7	7.5	6.3	4.4	9.4	-6.2	-0.3	11.0	18.0	-0.6	3.1	4.6	17.1	-2.2	1.2	19.8	8.1	-1.1	10.3	8.0	12.9	-0.4	12.6	9.3	15.8	4.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	643000.0	-662000.0	-1289000.0	-1698000.0	227000.0	-2941000.0	-1300000.0	-2600000.0	-3668000.0	-1718000.0	-1272000.0	-1273000.0	-1345000.0	-1256000.0	-795000.0	-1131000.0	-1856000.0	-970000.0	-626000.0	-929000.0	-1066000.0	-1937000.0	-1180000.0	-3760000.0	-682000.0	-6150000.0	-789000.0	-1301000.0	-773000.0	-1295000.0	-778000.0	-614000.0	-382000.0
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.8	-0.9	-1.7	-2.2	0.3	-3.9	-1.7	-3.1	-4.6	-2.0	-1.5	-1.6	-1.7	-1.7	-1.1	-1.5	-2.5	-1.3	-0.9	-1.3	-1.6	-3.0	-1.9	-5.7	-1.1	-10.1	-1.2	-2.0	-1.3	-2.1	-1.3	-1.0	-0.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	-1630000.0	-7444000.0	-1683000.0	-4127000.0	-1638000.0	-6153000.0	-357000.0	-1531000.0	-1619000.0	-7346000.0	-4195000.0	-1568000.0	-1919000.0	-5379000.0	-299000.0	-1792000.0	-1455000.0	-3993000.0	-1002000.0	-1590000.0	-1486000.0	-2691000.0	-1809000.0	-6696000.0	-3431000.0	-3408000.0	-3106000.0	-4881000.0	-1682000.0	-715000.0	-447000.0	353000.0	-894000.0
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	-2.1	-10.0	-2.3	-5.3	-2.1	-8.1	-0.5	-1.9	-2.0	-8.7	-4.9	-1.9	-2.5	-7.1	-0.4	-2.4	-2.0	-5.5	-1.5	-2.2	-2.3	-4.1	-2.9	-10.2	-5.6	-5.6	-4.9	-7.5	-2.8	-1.2	-0.8	0.6	-1.6

Cash And Cash Equivalents Period Increase Decrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	3.437	2.902	-7.953	-9.222	11	1.333	-1.448	-4.861	-2.634	6.996	-9.175	-4.146	8.266	9.393	0.981	-5.17	2.147	11	-3.464	-0.779	10	49	-3.928	-2.886	2.241	10	-3.596	-4.386	8.772	-4.693	-4.141	-4.51	1.426	1.872	-3.783	5.427	6.135	9.542	1.971
Percentage of CashAndCashEquivalentsPeriodIncreaseDecrease	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.6	3.7	-10.2	-12.1	14.8	1.6	-1.8	-5.7	-3.1	8.7	-11.9	-5.5	11.6	12.8	1.4	-7.4	3.3	16.0	-5.1	-1.1	14.9	61.7	-5.3	-4.0	3.3	13.9	-5.5	-6.7	14.2	-7.1	-6.7	-7.4	2.2	2.9	-6.2	8.8	10.3	15.3	3.6

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

Period End	2020-10-31	2019-10-31
Value	2685000.0	-7953000.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	3.5	-10.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	3.202	5.112	10	9.296	-6.477	-0.017	14	3.89	5.971	5.361	3.785	7.574	-4.794	-0.244	7.882	13	-0.434	2.287	3.178	12	-1.474	0.776	12	5.316	-0.65	6.286	5.087	8.396	-0.255	7.796	5.511	9.845	2.364
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.2	6.9	14.7	11.8	-8.3	-0.0	18.2	4.7	7.5	6.3	4.4	9.4	-6.2	-0.3	11.0	18.0	-0.6	3.1	4.6	17.1	-2.2	1.2	19.8	8.1	-1.1	10.3	8.0	12.9	-0.4	12.6	9.3	15.8	4.3

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	3.213	0.06	-0.41	0.41	0.125	-13.25	-3.234	4.936	2.982	1.113	1.397	-5.172	-0.161	-1.161	-2.571	-15.159	1.533	0.6	-2.742	4.146	2.586	1.631	0.549	6.947	5.09	0.985	-0.076	4.346	2.049	1.254	-1.263	2.011	1.825	0.959	1.844	3.684	3.01	3.07	1.02	1.943	1.673	0.315
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.2	0.1	-0.6	0.5	0.2	-17.3	-4.1	6.0	3.7	1.3	1.6	-6.4	-0.2	-1.5	-3.6	-20.7	2.2	0.9	-4.2	6.0	3.8	2.3	0.8	8.7	6.9	1.3	-0.1	5.9	3.1	1.9	-2.0	3.1	3.0	1.6	2.9	5.7	5.0	5.0	1.7	3.1	3.0	0.6

us-gaap:NetIncomeLoss us-gaap:StatementClassOfStock

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	2.77	0.052	-0.353	0.353	0.107	-11.379	-2.774	4.232	2.557	0.954	1.196	-4.43	-0.139	-0.994	-2.199	-12.966	1.311	0.513	-2.341	3.539	2.208	1.392	0.468	5.758	4.218	0.816	-0.064	3.594	1.694	1.036	-1.043	1.661	1.503	0.795	1.524	3.047	2.499	2.544
Percentage of NetIncomeLoss	86.2	86.7	86.1	86.1	85.6	85.9	85.8	85.7	85.7	85.7	85.6	85.7	86.3	85.6	85.5	85.5	85.5	85.5	85.4	85.4	85.4	85.3	85.2	82.9	82.9	82.8	84.2	82.7	82.7	82.6	82.6	82.6	82.4	82.9	82.6	82.7	83.0	82.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	3.6	0.1	-0.5	0.4	0.1	-14.9	-3.6	5.1	3.2	1.1	1.4	-5.5	-0.2	-1.3	-3.1	-17.7	1.9	0.7	-3.6	5.1	3.2	2.0	0.7	7.2	5.7	1.1	-0.1	4.9	2.6	1.6	-1.7	2.5	2.4	1.3	2.4	4.7	4.1	4.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CommonClassA	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	0.443	0.008	-0.057	0.057	0.018	-1.871	-0.46	0.704	0.425	0.159	0.201	-0.742	-0.022	-0.167	-0.372	-2.193	0.222	0.087	-0.401	0.607	0.378	0.239	0.081	1.189	0.872	0.169	-0.012	0.752	0.355	0.218	-0.22	0.35	0.322	0.164	0.32	0.637	0.511	0.526
Percentage of NetIncomeLoss	13.8	13.3	13.9	13.9	14.4	14.1	14.2	14.3	14.3	14.3	14.4	14.3	13.7	14.4	14.5	14.5	14.5	14.5	14.6	14.6	14.6	14.7	14.8	17.1	17.1	17.2	15.8	17.3	17.3	17.4	17.4	17.4	17.6	17.1	17.4	17.3	17.0	17.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.6	0.0	-0.1	0.1	0.0	-2.4	-0.6	0.9	0.5	0.2	0.2	-0.9	-0.0	-0.2	-0.5	-3.0	0.3	0.1	-0.6	0.9	0.6	0.3	0.1	1.5	1.2	0.2	-0.0	1.0	0.5	0.3	-0.4	0.5	0.5	0.3	0.5	1.0	0.8	0.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CommonClassB	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	3.213	0.06	-0.41	0.41	0.125	-13.25	-3.234	4.936	2.982	1.113	1.397
Percentage of NetIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	4.2	0.1	-0.6	0.5	0.2	-17.3	-4.1	6.0	3.7	1.3	1.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	-2.929	-5.068	-32.458	41	-1.154	-7.155	-32.033	35	-6.89	-1.49	-25.543	31	9.025	-4.86	-23.25	30	-6.082	1.018	-21.43	24	-4.234	-4.46	-26.823	34	-4.828	1.846	-20.322	27	1.762	0.102	-28.373	31	3.727	-47.885	19	-25.132	-0.14	7.064	17	-24.974	2.645
Percentage of IncreaseDecreaseInAccountsReceivable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	2313000.0	-914000.0	-3157000.0	4199000.0	-2138000.0	-532000.0	-1378000.0	-866000.0	-23000.0	1979000.0	-5459000.0	3802000.0	1599000.0	699000.0	-3279000.0	3744000.0	420000.0	-367000.0	-3151000.0	2672000.0	361000.0	-18000.0	-4456000.0	3937000.0	466000.0	1479000.0	-3314000.0	3580000.0	-582000.0	55000.0	-4313000.0	4694000.0	-35000.0	635000.0	-3152000.0	3603000.0	-369000.0	-647000.0	-2816000.0	3569000.0	-380000.0
Percentage of IncreaseDecreaseInAccountsPayable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation

us-gaap:ShareBasedCompensation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	3.77	3.951	2.405	2.958	2.904	3.188	2.304	2.504	2.148	3.364	2.106	2.253	2.311	2.592	1.768	1.802	1.549	2.418	1.554	1.822	1.881	2.431	1.306	1.199	1.209	1.709	0.876	0.966	1.22	1.55	0.944	1.002	1.139	1.428	1.039	1.005	1.228	1.162	1.112	1.104	1.448
Percentage of ShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	643000.0	-662000.0	-1289000.0	-1698000.0	227000.0	-2941000.0	-1300000.0	-2600000.0	-3668000.0	-1718000.0	-1272000.0	-1273000.0	-1345000.0	-1256000.0	-795000.0	-1131000.0	-1856000.0	-970000.0	-626000.0	-929000.0	-1066000.0	-1937000.0	-1180000.0	-3760000.0	-682000.0	-6150000.0	-789000.0	-1301000.0	-773000.0	-1295000.0	-778000.0	-614000.0	-382000.0
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.8	-0.9	-1.7	-2.2	0.3	-3.9	-1.7	-3.1	-4.6	-2.0	-1.5	-1.6	-1.7	-1.7	-1.1	-1.5	-2.5	-1.3	-0.9	-1.3	-1.6	-3.0	-1.9	-5.7	-1.1	-10.1	-1.2	-2.0	-1.3	-2.1	-1.3	-1.0	-0.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	408000.0	308000.0	1017000.0	1420000.0	544000.0	2671000.0	1036000.0	1115000.0	1221000.0	911000.0	1093000.0	1133000.0	1016000.0	919000.0	652000.0	1101000.0	484000.0	608000.0	1074000.0	567000.0	988000.0	513000.0	1140000.0	1240000.0	1864000.0	903000.0	570000.0	813000.0	966000.0	1870000.0	1130000.0	537000.0	505000.0	1344000.0	685000.0	1188000.0	624000.0	1188000.0	781000.0	428000.0	323000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	-1630000.0	-7444000.0	-1683000.0	-4127000.0	-1638000.0	-6153000.0	-357000.0	-1531000.0	-1619000.0	-7346000.0	-4195000.0	-1568000.0	-1919000.0	-5379000.0	-299000.0	-1792000.0	-1455000.0	-3993000.0	-1002000.0	-1590000.0	-1486000.0	-2691000.0	-1809000.0	-6696000.0	-3431000.0	-3408000.0	-3106000.0	-4881000.0	-1682000.0	-715000.0	-447000.0	353000.0	-894000.0
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	-2.1	-10.0	-2.3	-5.3	-2.1	-8.1	-0.5	-1.9	-2.0	-8.7	-4.9	-1.9	-2.5	-7.1	-0.4	-2.4	-2.0	-5.5	-1.5	-2.2	-2.3	-4.1	-2.9	-10.2	-5.6	-5.6	-4.9	-7.5	-2.8	-1.2	-0.8	0.6	-1.6

Payments Of Dividends

us-gaap:PaymentsOfDividends

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-01-31	2018-10-31	2018-01-31	2017-10-31	2017-01-31	2016-10-31	2016-01-31	2015-10-31
Value	1451000.0	1448000.0	1431000.0	1430000.0	1426000.0	1374000.0	1374000.0	1346000.0	1346000.0	1331000.0	1328000.0	1313000.0	1313000.0
Percentage of PaymentsOfDividends	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2018-04-30	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30
Value	16.0	88.0	1.7	0.92	-2.92	0.28	0.17	0.57	0.46	1.15	-2.53	0.32	0.43	-7.82	0.28	0.01	0.22	0.38	0.27	0.4	0.42	0.19	0.32	0.26	0.46
Percentage of EffectiveIncomeTaxRateContinuingOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2012-10-31	2012-07-31	2012-01-31	2011-01-31
Value	1147000.0	1148000.0	1348000.0	1349000.0	1505000.0	2516000.0	2533000.0	2893000.0	2570000.0	2596000.0	2611000.0	2655000.0	2371000.0	2499000.0	2973000.0	3004000.0	2871000.0	2653000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:StockAppreciationRightsSARS

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2012-07-31	2012-01-31	2011-01-31
Value	24.87	24.86	23.39	20.87	20.81	15.36	14.78	14.74	14.72	14.64	12.76	12.69	11.04	11.34	11.33
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:RestrictedStockUnitsRSU

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2013-01-31	2012-10-31
Value	1000.0	331000.0	11000.0	20000.0	0	-1000.0	3000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	100.0	100.0	100.0	100.0	0.0	100.0	100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-04-30	2019-01-31	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31	2011-01-31
Value	1300000.0	1300000.0	1200000.0	1171000.0	1300000.0	1168000.0	1662000.0	1743000.0	1545000.0	1924000.0	2626000.0	2581000.0	2649000.0	2502000.0
Percentage of UnrecognizedTaxBenefits	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-01-31	2016-01-31	2015-01-31	2014-01-31	2013-01-31	2012-01-31
Value	52	53	51	50	49	46	35	34	35	36	33	33	29	13	10	10	10	11
Percentage of DeferredTaxAssetsValuationAllowance	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:IncomeTaxAuthority

qada:FederalAndStateTaxAuthority

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31
Value	31	32	30	30	29	26	24
Percentage of DeferredTaxAssetsValuationAllowance	59.2	59.7	60.1	59.4	59.1	58.0	70.8

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

us-gaap:ForeignCountry, qada:IncomeTaxAuthoritySouthAfrica

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	0.2	0.2	0.1	0.2	0.2	0.2
Percentage of DeferredTaxAssetsValuationAllowance	0.4	0.4	0.2	0.4	0.4	0.4

us-gaap:ForeignCountry, us-gaap:FederalMinistryOfFinanceGermany

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31
Value	2.7	2.8	2.5	2.6	2.7	2.7	2.9
Percentage of DeferredTaxAssetsValuationAllowance	5.1	5.2	4.9	5.1	5.5	5.8	8.3

us-gaap:ForeignCountry, us-gaap:InlandRevenueHongKong

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31
Value	0.6	0.6	0.6	0.6	0.6	1.2	1.2
Percentage of DeferredTaxAssetsValuationAllowance	1.1	1.1	1.2	1.2	1.2	2.6	3.4

us-gaap:ForeignCountry, us-gaap:RevenueCommissionersIreland

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	11	11	11	11	11	9.9
Percentage of DeferredTaxAssetsValuationAllowance	21.9	22.1	21.4	22.8	22.8	21.4

us-gaap:ForeignCountry, us-gaap:SecretariatOfTheFederalRevenueBureauOfBrazil

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-01-31
Value	6.5	6.2	6.3	5.7	5.4	5.4	5.2
Percentage of DeferredTaxAssetsValuationAllowance	12.3	11.5	12.3	11.2	11.0	11.7	14.9

qada:CapitalizedComputerSoftwareWriteDowns

Period End	2020-10-31
Value	500000.0
Percentage of CapitalizedComputerSoftwareWriteDowns	100.0

qada:IncreaseDecreaseInCostsCapitalizedToObtainRevenueFromContractsNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	1412000.0	1347000.0	899000.0	2303000.0	1331000.0	1231000.0	927000.0	1620000.0	818000.0	927000.0	765000.0
Percentage of IncreaseDecreaseInCostsCapitalizedToObtainRevenueFromContractsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:IncreaseDecreaseInOperatingLeaseLiabilities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30
Value	1297000.0	1379000.0	1342000.0	1500000.0	1482000.0	1511000.0	1584000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:NoncashLeaseExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30
Value	1471000.0	1453000.0	1457000.0	1504000.0	1495000.0	1509000.0	1456000.0
Percentage of NoncashLeaseExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:PaymentsToDevelopSoftwareToBeSoldLeasedOrOtherwiseMarketed

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	445000.0	354000.0	272000.0	280000.0	429000.0	270000.0	264000.0	289000.0	242000.0	357000.0	179000.0	210000.0	329000.0	337000.0	143000.0	37000.0	47000.0	50000.0	12000.0	83000.0	31000.0	11000.0	28000.0	196000.0	-8000.0	67000.0	56000.0	149000.0	69000.0	94000.0	54000.0	118000.0	175000.0	94000.0	105000.0	118000.0	50000.0	104000.0	13000.0	187000.0	50000.0
Percentage of PaymentsToDevelopSoftwareToBeSoldLeasedOrOtherwiseMarketed	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod us-gaap:AwardType

qada:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod

us-gaap:PerformanceShares

Period End	2020-10-31
Value	0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod	0.0

us-gaap:RestrictedStockUnitsRSU

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31
Value	2000.0	240000.0	6000.0	11000.0	2000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod	0.0	0.0	0.0	0.0	0.0

qada:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

qada:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU

Period End	2020-04-30	2020-01-31	2019-10-31
Value	28.17	0.4	-0.02
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue	100.0	100.0	100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:AwardType

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PerformanceShares

Period End	2020-10-31	2020-07-31
Value	0	300000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	0.0	100.0

us-gaap:RestrictedStockUnitsRSU

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31
Value	0	3100000.0	93000.0	100000.0	11000.0	3200000.0	200000.0	0	100000.0	4000000.0	200000.0	0	62000.0	2200000.0	61000.0	1454000.0	-1354000.0	1100000.0	300000.0	0	65000.0	1300000.0	14000.0	0	12000.0	900000.0	45000.0	24000.0	138000.0	359000.0	79000.0	-10000.0	276000.0	359000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	0.0	1033.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2013-04-30	2012-07-31
Value	0	2400000.0	11000.0	2500000.0	66000.0	98000.0	57000.0	0	44000.0	500000.0	3900000.0	100000.0	400000.0	400000.0	100000.0	504000.0	-74000.0	101000.0	69000.0	100000.0	200000.0	500000.0	400000.0	54000.0	90000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	0.0	800.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:CapitalizedComputerSoftwareAmortization1

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31
Value	300000.0	300000.0	300000.0	200000.0	200000.0	200000.0	200000.0	200000.0	200000.0	100000.0	100000.0	200000.0	200000.0	200000.0	200000.0	300000.0	200000.0	300000.0	200000.0	300000.0	300000.0
Percentage of CapitalizedComputerSoftwareAmortization1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CapitalizedContractCostAmortization

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	1242000.0	1216000.0	1175000.0	1154000.0	1140000.0	1088000.0	1073000.0	1069000.0	1056000.0	1047000.0	1004000.0
Percentage of CapitalizedContractCostAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CapitalizedContractCostAmortization us-gaap:CapitalizedContractCost, us-gaap:IncomeStatementLocation

qada:CostsToFulfillContract, us-gaap:CostOfSales

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	200000.0	200000.0	100000.0	200000.0	100000.0	100000.0	100000.0	100000.0	100000.0	100000.0	100000.0
Percentage of CapitalizedContractCostAmortization	16.1	16.4	8.5	17.3	8.8	9.2	9.3	9.4	9.5	9.6	10.0

qada:DirectCostsOfObtainingContract, us-gaap:SellingAndMarketingExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	1100000.0	1100000.0	1000000.0	1000000.0	1000000.0	900000.0	900000.0	900000.0	900000.0	900000.0	900000.0
Percentage of CapitalizedContractCostAmortization	88.6	90.5	85.1	86.7	87.7	82.7	83.9	84.2	85.2	86.0	89.6

us-gaap:ConcentrationRiskPercentage1 us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

country:CA, qada:NorthAmericaRevenue, us-gaap:GeographicConcentrationRisk

Period End	2020-10-31	2020-07-31	2020-04-30	2019-10-31	2019-07-31	2019-04-30	2018-10-31	2018-07-31	2018-04-30	2017-07-31	2017-04-30
Value	3.0	2.0	0.02	0.02	0.02	0.03	0.02	0.01	0.02	0.01	0.01
Percentage of ConcentrationRiskPercentage1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

Period End	2020-10-31	2018-10-31	2018-07-31	2017-10-31
Value	24	50	49	150
Percentage of ContractWithCustomerLiabilityRevenueRecognized	100.0	100.0	100.0	100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

qada:QuadOrtegaHillLlc, qada:Mortgage2012, qada:RabobankNa, us-gaap:LondonInterbankOfferedRateLIBOR

Period End	2020-07-31	2020-04-30	2020-01-31	2019-04-30	2018-04-30	2012-05-30
Value	0.17	0.007	0.0167	0.0248	0.019	0.0225
Percentage of DebtInstrumentBasisSpreadOnVariableRate1	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredOtherTaxExpenseBenefit

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30
Value	65000.0	-1934000.0	-70000.0	-6495000.0	-21000.0	-18000.0	37000.0
Percentage of DeferredOtherTaxExpenseBenefit	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:InterestRateSwap

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31
Value	-251000.0	720000.0	-101000.0	-160000.0	-91000.0	-147000.0	46000.0	35000.0	117000.0	480000.0	106000.0	-16000.0	13000.0	454000.0	243000.0	-181000.0	-31000.0	-212000.0	-187000.0	596000.0	-245000.0	-1200000.0	200000.0	54000.0	46000.0	1100000.0	200000.0	-987000.0	287000.0	300000.0	100000.0
Percentage of DerivativeGainLossOnDerivativeNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31
Value	70000.0	32000.0	-251000.0	-16000.0	-101000.0	-160000.0	-91000.0	-249000.0	46000.0	35000.0	117000.0	274000.0	106000.0	-16000.0	13000.0	454000.0	243000.0	-181000.0	-31000.0	-212000.0	-187000.0	106000.0	245000.0	-556000.0	-214000.0	-61000.0	-46000.0	85000.0	-159000.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DividendsCommonStock

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	1451000.0	1448000.0	1431000.0	1430000.0	1426000.0	1387000.0	1374000.0	1374000.0	1374000.0	1372000.0	1359000.0	1346000.0	1345000.0	1344000.0	1331000.0	1331000.0	1328000.0	1326000.0	1316000.0	1313000.0	1313000.0	1310000.0	1299000.0	1118000.0	1118000.0	1113000.0	1103000.0	1095000.0	1090000.0	1089000.0	1088000.0	5430000.0	1060000.0	1110000.0	1078000.0	1094000.0	1120000.0	947000.0
Percentage of DividendsCommonStock	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DividendsCommonStock us-gaap:StatementClassOfStock

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	1251000.0	1249000.0	1232000.0	1231000.0	1226000.0	1191000.0	1178000.0	1178000.0	1178000.0	1176000.0	1164000.0	1154000.0	1152000.0	1151000.0	1138000.0	1138000.0	1136000.0	1134000.0	1124000.0	1120000.0	1121000.0	1118000.0	1107000.0	927000.0	926000.0	922000.0	912000.0	906000.0	901000.0	900000.0	899000.0	4483000.0	873000.0	920000.0	890000.0	904000.0	930000.0	785000.0
Percentage of DividendsCommonStock	86.2	86.3	86.1	86.1	86.0	85.9	85.7	85.7	85.7	85.7	85.7	85.7	85.7	85.6	85.5	85.5	85.5	85.5	85.4	85.3	85.4	85.3	85.2	82.9	82.8	82.8	82.7	82.7	82.7	82.6	82.6	82.6	82.4	82.9	82.6	82.6	83.0	82.9

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	200000.0	199000.0	199000.0	199000.0	200000.0	196000.0	196000.0	196000.0	196000.0	196000.0	195000.0	192000.0	193000.0	193000.0	193000.0	193000.0	192000.0	192000.0	192000.0	193000.0	192000.0	192000.0	192000.0	191000.0	192000.0	191000.0	191000.0	189000.0	189000.0	189000.0	189000.0	947000.0	187000.0	190000.0	188000.0	190000.0	190000.0	162000.0
Percentage of DividendsCommonStock	13.8	13.7	13.9	13.9	14.0	14.1	14.3	14.3	14.3	14.3	14.3	14.3	14.3	14.4	14.5	14.5	14.5	14.5	14.6	14.7	14.6	14.7	14.8	17.1	17.2	17.2	17.3	17.3	17.3	17.4	17.4	17.4	17.6	17.1	17.4	17.4	17.0	17.1

us-gaap:DividendsCommonStockCash

Period End	2020-10-31	2020-06-11	2020-07-31	2020-04-07	2020-04-30	2020-01-31	2019-09-04	2019-10-31	2019-06-24	2019-07-31	2019-04-09	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	1451000.0	1448000.0	1448000.0	1431.0	1431000.0	1430000.0	1426.0	1426000.0	1387000.0	1387000.0	1374000.0	1374000.0	1374000.0	1374000.0	1372000.0	1359000.0
Percentage of DividendsCommonStockCash	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	1451000.0	1448000.0	1431000.0	1430000.0	1426000.0	1387000.0	1374000.0	1374000.0	1374000.0	1372000.0	1359000.0
Percentage of DividendsCommonStockCash	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	470000.0	3547000.0	-4503000.0	-569000.0	-65000.0	-111000.0	-961000.0	1574000.0	-2132000.0	-1158000.0	-952000.0	2263000.0	-1117000.0	2733000.0	1478000.0	-893000.0	-376000.0	-1191000.0	2351000.0	-689000.0	-707000.0	-1518000.0	-103000.0	-4018000.0	-183000.0	-210000.0	691000.0	139000.0	430000.0	-534000.0	-512000.0	447000.0	622000.0	-1238000.0	234000.0	-342000.0	-1073000.0	-359000.0	1849000.0	-42000.0	883000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:GainLossOnDispositionOfAssets

Period End	2020-10-31	2020-01-31	2019-10-31	2019-01-31	2018-10-31	2018-01-31	2017-10-31	2017-01-31	2016-10-31
Value	-12000.0	-27000.0	-35000.0	-8000.0	-22000.0	-33000.0	-40000.0	-31000.0	-6000.0
Percentage of GainLossOnDispositionOfAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

Period End	2020-10-31
Value	-3000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss	100.0

us-gaap:IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

Period End	2020-10-31	2020-01-31	2019-10-31	2019-07-31	2018-10-31
Value	0.8	5.379	0.8	10.0	0.8
Percentage of IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	-9285000.0	-10459000.0	-13381000.0	37496000.0	-12715000.0	-9281000.0	-9426000.0	34008000.0	-9294000.0	-10663000.0	-11020000.0	30840000.0	-5852000.0	-10364000.0	-7623000.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	1096000.0	4372000.0	-12033000.0	6455000.0	1285000.0	126000.0	-6796000.0	4764000.0	-389000.0	3194000.0	-9316000.0	9342000.0	3737000.0	573000.0	-5174000.0	4868000.0	1659000.0	2805000.0	-6850000.0	4528000.0	234000.0	1953000.0	-8976000.0	6469000.0	1162000.0	2902000.0	-6957000.0	5405000.0	2519000.0	1283000.0	-4943000.0	1777000.0	4740000.0	-1993000.0	-4996000.0	3679000.0	3146000.0	1402000.0	-6653000.0	4774000.0	2207000.0
Percentage of IncreaseDecreaseInOtherOperatingLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31
Value	1323000.0	-1337000.0	-1279000.0	-3354000.0	2084000.0	-70000.0	1753000.0	3578000.0	-1582000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InvestmentIncomeInterest

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31	2010-07-31
Value	108000.0	213000.0	436000.0	574000.0	695000.0	789000.0	724000.0	687000.0	646000.0	743000.0	524000.0	446000.0	440000.0	493000.0	168000.0	181000.0	184000.0	159000.0	172000.0	96000.0	80000.0	87000.0	57000.0	73000.0	56000.0	56000.0	57000.0	59000.0	55000.0	73000.0	97000.0	124000.0	139000.0	164000.0	-163000.0	-160000.0	-188000.0	-146000.0	-136000.0	-131000.0	-140000.0	-111000.0
Percentage of InvestmentIncomeInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:AccumulatedTranslationAdjustment

Period End	2020-10-31
Value	405000.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent	100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30
Value	405000.0	1607000.0	-2655000.0	-406000.0	-313000.0	298000.0	-263000.0	1177000.0	-1174000.0	-326000.0	-510000.0	774000.0	-743000.0	1132000.0	640000.0	-243000.0	-20000.0	-246000.0	606000.0	-173000.0	-466000.0	-745000.0	73000.0	-1126000.0	873000.0	-346000.0	139000.0	948000.0	-261000.0	18000.0	373000.0	1392000.0	556000.0	-75000.0	145000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	405000.0	1607000.0	-2655000.0	-406000.0	-313000.0	298000.0	-263000.0	1177000.0	-1174000.0	-326000.0	-510000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:AccumulatedTranslationAdjustment

Period End	2020-10-31
Value	405000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	100.0

us-gaap:OtherDepreciationAndAmortization

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30
Value	1644000.0	1843000.0	1652000.0	1667000.0	1675000.0	1577000.0	1493000.0
Percentage of OtherDepreciationAndAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherNoncashIncomeExpense

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2018-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31
Value	-46000.0	58000.0	-70000.0	12000.0	-2000.0	-5000.0	-64000.0	-3000.0	-10000.0	0	0	-22000.0	-8000.0	-12000.0	1000.0	-1000.0	12000.0	-12000.0	2000.0
Percentage of OtherNoncashIncomeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	23000.0	5839000.0	103000.0	2556000.0	76000.0	3261000.0	235000.0	39000.0	129000.0	4498000.0	4078000.0	110000.0	462000.0	2611000.0	170000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

Period End	2020-10-31
Value	1500000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment	100.0

us-gaap:ProvisionForDoubtfulAccounts

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-04-30	2011-01-31	2010-10-31
Value	-45000.0	273000.0	939000.0	-171000.0	529000.0	194000.0	-67000.0	826000.0	428000.0	228000.0	270000.0	346000.0	488000.0	74000.0	113000.0	80000.0	49000.0	151000.0	191000.0	121000.0	311000.0	319000.0	331000.0	45000.0	159000.0	337000.0	386000.0	150000.0	181000.0	413000.0	260000.0	100000.0	-36000.0	574000.0	436000.0	77000.0	73000.0	271000.0	-242000.0
Percentage of ProvisionForDoubtfulAccounts	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RepaymentsOfDebt

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30
Value	149000.0	122000.0	117000.0	129000.0	106000.0	102000.0	97000.0	94000.0	80000.0	96000.0
Percentage of RepaymentsOfDebt	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings

us-gaap:CommonClassA, us-gaap:CommonStock

Period End	2020-04-30	2020-01-31
Value	4.0	-3988.0
Percentage of RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings	100.0	100.0

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	-9000.0	-3427000.0	-92000.0	-105000.0	-11000.0	-3163000.0	-178000.0	-9000.0	-84000.0	-4021000.0	-182000.0
Percentage of RestrictedStockValueSharesIssuedNetOfTaxWithholdings	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedStockValueSharesIssuedNetOfTaxWithholdings us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	-9000.0	-3427000.0	-92000.0	-104000.0	12000.0	-5327000.0	-219000.0	-14000.0	-180000.0	-5670000.0	-113000.0
Percentage of RestrictedStockValueSharesIssuedNetOfTaxWithholdings	100.0	100.0	100.0	99.0	-109.1	168.4	123.0	155.6	214.3	141.0	62.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:PerformanceShares

Period End	2020-10-31
Value	0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0.0

us-gaap:RestrictedStockUnitsRSU

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2013-01-31	2012-10-31
Value	9000.0	5000.0	5000.0	15000.0	9000.0	1000.0	2000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU

Period End	2020-04-30	2020-01-31	2019-10-31
Value	38.92	0.61	0.34
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU

Period End	2020-04-30	2020-01-31	2019-10-31
Value	39.92	0.69	0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	100.0	100.0	0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2012-07-31	2011-07-31
Value	0.0	0.3	0.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0.0	100.0	100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:AwardType

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:RestrictedStockUnitsRSU

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31
Value	2000.0	2000.0	300.0	76000.0	4000.0	1000.0	2000.0	75000.0	4000.0	0	2000.0	70000.0	2000.0	72800.0	-70300.0	56700.0	16000.0	0	2600.0	48800.0	600.0	0	1000.0	42000.0	3000.0	1000.0	10000.0	30000.0	6000.0	0	22000.0	30000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0

us-gaap:StockAppreciationRightsSARS

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2013-04-30	2012-07-31
Value	200.0	51000.0	1000.0	2000.0	1000.0	1000.0	700.0	10000.0	93000.0	3000.0	12000.0	12000.0	4000.0	20800.0	-4600.0	5400.0	3400.0	2100.0	7800.0	18400.0	15600.0	4000.0	7000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation	10.0	2550.0	333.3	2.6	25.0	100.0	35.0	13.3	2325.0	0.0	600.0	17.1	200.0	28.6	6.5	9.5	21.2	0.0	300.0	37.7	2600.0	66.7	23.3

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap:AwardType

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2012-10-31
Value	1000.0	30000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	-14000.0	-2412000.0	-11000.0	-2451000.0	-65000.0	-98000.0	-57000.0	-30000.0	-45000.0	-477000.0	-3896000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	-14000.0	-2565000.0	-11000.0	-2451000.0	-1807000.0	-213000.0	-144000.0	-59000.0	-97000.0	-1331000.0	-6391000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	100.0	106.3	100.0	100.0	2780.0	217.3	252.6	196.7	215.6	279.0	164.0

us-gaap:UndistributedEarnings

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	1762000.0	-1388000.0	-1841000.0	-1020000.0	-1301000.0	-14637000.0	-4608000.0	3562000.0	1608000.0	-259000.0	38000.0	-6518000.0	-1506000.0	-2505000.0	-3902000.0	-16490000.0	205000.0	-726000.0	-4058000.0	2833000.0	1273000.0	321000.0	-750000.0	5829000.0	3972000.0	-128000.0	-1179000.0	3251000.0	959000.0	165000.0	-2351000.0	-3419000.0	765000.0	-151000.0	766000.0	2590000.0	1890000.0	2123000.0
Percentage of UndistributedEarnings	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:UndistributedEarnings us-gaap:StatementClassOfStock

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	1519000.0	-1197000.0	-1585000.0	-878000.0	-1119000.0	-12570000.0	-3952000.0	3054000.0	1379000.0	-222000.0	32000.0	-5584000.0	-1291000.0	-2145000.0	-3337000.0	-14104000.0	175000.0	-621000.0	-3465000.0	2419000.0	1087000.0	274000.0	-639000.0	4831000.0	3292000.0	-106000.0	-976000.0	2688000.0	793000.0	136000.0	-1942000.0	-2822000.0	630000.0	-125000.0	634000.0	2143000.0	1569000.0	1759000.0
Percentage of UndistributedEarnings	86.2	86.2	86.1	86.1	86.0	85.9	85.8	85.7	85.8	85.7	84.2	85.7	85.7	85.6	85.5	85.5	85.4	85.5	85.4	85.4	85.4	85.4	85.2	82.9	82.9	82.8	82.8	82.7	82.7	82.4	82.6	82.5	82.4	82.8	82.8	82.7	83.0	82.9

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31
Value	243000.0	-191000.0	-256000.0	-142000.0	-182000.0	-2067000.0	-656000.0	508000.0	229000.0	-37000.0	6000.0	-934000.0	-215000.0	-360000.0	-565000.0	-2386000.0	30000.0	-105000.0	-593000.0	414000.0	186000.0	47000.0	-111000.0	998000.0	680000.0	-22000.0	-203000.0	563000.0	166000.0	29000.0	-409000.0	-597000.0	135000.0	-26000.0	132000.0	447000.0	321000.0	364000.0
Percentage of UndistributedEarnings	13.8	13.8	13.9	13.9	14.0	14.1	14.2	14.3	14.2	14.3	15.8	14.3	14.3	14.4	14.5	14.5	14.6	14.5	14.6	14.6	14.6	14.6	14.8	17.1	17.1	17.2	17.2	17.3	17.3	17.6	17.4	17.5	17.6	17.2	17.2	17.3	17.0	17.1

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

Period End	2020-10-31	2020-07-31	2020-04-30	2019-04-30
Value	0	0	1000000.0	1000000.0
Percentage of UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0.0	0.0	100.0	100.0

us-gaap:ValuationAllowanceDeferredTaxAssetChangeInAmount

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30
Value	1167000.0	-1594000.0	-518000.0	-1803000.0	-2849000.0	-10718000.0	-809000.0	536000.0	793000.0	-3137000.0	-1416000.0	2487000.0	-1225000.0	-1850000.0	-1107000.0
Percentage of ValuationAllowanceDeferredTaxAssetChangeInAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:CommonClassA

Period End	2020-10-31	2020-07-31	2019-10-31	2018-10-31	2018-07-31	2018-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	497000.0	568000.0	877000.0	1590000.0	1661000.0	1750000.0	829000.0	586000.0	0	749000.0	794000.0	786000.0	622000.0	737000.0	0	464000.0	430000.0	0	455.0	433000.0	519000.0	407.0	397000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-10-31	2020-07-31	2019-10-31	2018-10-31	2018-07-31	2018-04-30	2016-10-31	2016-07-31	2016-04-30	2015-10-31	2015-07-31	2015-04-30	2014-10-31	2014-07-31	2014-04-30	2013-10-31	2013-07-31	2013-04-30	2012-10-31	2012-07-31	2012-04-30	2011-10-31	2011-07-31
Value	57000.0	68000.0	90000.0	169000.0	171000.0	182000.0	95000.0	70000.0	0	83000.0	83000.0	83000.0	76000.0	92000.0	0	86000.0	86000.0	0	103.0	100000.0	119000.0	98.0	99000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment	11.5	12.0	10.3	10.6	10.3	10.4	11.5	11.9	0.0	11.1	10.5	10.6	12.2	12.5	0.0	18.5	20.0	0.0	22.6	23.1	22.9	24.1	24.9

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA

Period End	2020-05-31	2020-03-31	2019-11-30	2019-08-31	2019-05-31	2019-03-31	2018-11-30	2018-08-31	2018-05-31	2018-03-31	2017-11-30	2017-08-31	2017-05-31	2017-03-31	2016-11-30	2016-08-31	2016-05-31	2016-03-31	2015-11-30	2015-08-31	2015-05-31	2015-03-31	2014-12-01	2014-08-31	2014-05-31	2014-03-31	2013-11-30	2013-08-31	2013-05-31	2013-03-31	2012-11-30	2012-08-31	2012-05-31	2012-03-30	2011-11-30	2011-08-31
Value	17	17	17	17	16	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15	15	15	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Percentage of EntityCommonStockSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CommonClassB

Period End	2020-05-31	2020-03-31	2019-11-30	2019-08-31	2019-05-31	2019-03-31	2018-11-30	2018-08-31	2018-05-31	2018-03-31	2017-11-30	2017-08-31	2017-05-31	2017-03-31	2016-11-30	2016-08-31	2016-05-31	2016-03-31	2015-11-30	2015-08-31	2015-05-31	2015-03-31	2014-12-01	2014-08-31	2014-05-31	2014-03-31	2013-11-30	2013-08-31	2013-05-31	2013-03-31	2012-11-30	2012-08-31	2012-05-31	2012-03-30	2011-11-30	2011-08-31
Value	3.321002	3.321002	3.321002	3.321002	3.263906	3.263906	3.263906	3.263906	3.263231	3.218246	3.217111	3.213126	3.211691	3.210285	3.207849	3.205865	3.205362	3.204217	3.203384	3.202526	3.199954	3.199065	3.190606	3.188353	3.17641	3.169902	3.156318	3.146641	3.142825	3.142287	3.154935	3.158678	3.160379	3.165664	3.198899	3.202239
Percentage of EntityCommonStockSharesOutstanding	19.4	19.4	19.5	19.5	19.9	19.9	19.9	20.0	20.2	20.1	20.1	20.1	20.3	20.3	20.3	20.3	20.5	20.5	20.6	20.6	20.8	20.8	24.8	24.8	25.1	25.1	25.1	25.1	25.3	25.3	25.3	25.1	25.0	25.0	24.9	24.7

qada:AcquiredSoftwareTechnology

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-01-31
Value	135000.0	135000.0	135000.0	135000.0	135000.0	135000.0	135000.0	135000.0	135000.0	135000.0	1466000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3458000.0	3577000.0	3577000.0	3577000.0
Percentage of AcquiredSoftwareTechnology	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:CapitalizedComputerSoftwareAmortizationExpenseRemainderOfFiscalYear

Period End	2020-10-31	2020-07-31
Value	298000.0	543000.0
Percentage of CapitalizedComputerSoftwareAmortizationExpenseRemainderOfFiscalYear	100.0	100.0

qada:CapitalizedComputerSoftwareAmortizationExpenseYearThree

Period End	2020-10-31	2020-07-31
Value	195000.0	92000.0
Percentage of CapitalizedComputerSoftwareAmortizationExpenseYearThree	100.0	100.0

qada:CapitalizedComputerSoftwareAmortizationExpenseYearTwo

Period End	2020-10-31	2020-07-31
Value	636000.0	488000.0
Percentage of CapitalizedComputerSoftwareAmortizationExpenseYearTwo	100.0	100.0

qada:CapitalizedSoftwareCostAmortizationExpenseNewTwelveMonths

Period End	2020-10-31	2020-07-31
Value	1000000.0	851000.0
Percentage of CapitalizedSoftwareCostAmortizationExpenseNewTwelveMonths	100.0	100.0

qada:CapitalizedSoftwareDevelopmentCosts

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-01-31
Value	3618000.0	3680000.0	3496000.0	3356000.0	3108000.0	2737000.0	2486000.0	2314000.0	2026000.0	1787000.0	1480000.0	1516000.0	1324000.0	1069000.0	732000.0	748000.0	772000.0	809000.0	788000.0	1029000.0	987000.0	1067000.0	1099000.0	1206000.0	1044000.0	1208000.0	1183000.0
Percentage of CapitalizedSoftwareDevelopmentCosts	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:LoanOriginationCosts

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31
Value	17000.0	19000.0	22000.0	24000.0	27000.0	30000.0	32000.0	35000.0	38000.0	40000.0	43000.0	46000.0	48000.0	51000.0	54000.0	56000.0	59000.0	62000.0	-64000.0	-67000.0
Percentage of LoanOriginationCosts	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:OperatingAndFinanceLeaseLiabilityCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	3893000.0	4059000.0	4107000.0	4371000.0	4668000.0	4855000.0
Percentage of OperatingAndFinanceLeaseLiabilityCurrent	100.0	100.0	100.0	100.0	100.0	100.0

qada:OperatingAndFinanceLeaseLiabilityNoncurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	16	16	13	14	13	14
Percentage of OperatingAndFinanceLeaseLiabilityNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0

qada:OperatingAndFinanceLeaseRightofuseAsset

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	18	19	16	18	17	18
Percentage of OperatingAndFinanceLeaseRightofuseAsset	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-01-31	2011-01-31
Value	3884000.0	4026000.0	3685000.0	2940000.0	3169000.0	2837000.0	2753000.0	2901000.0	2161000.0	1949000.0	1902000.0	1763000.0	1793000.0	2207000.0	2221000.0	2205000.0	2298000.0	2311000.0	2518000.0	2642000.0	2661000.0	2708000.0	2720000.0	2524000.0	2581000.0	2381000.0	2458000.0	2450000.0	2365000.0	2298000.0	2505000.0	2510000.0	2467000.0	2661000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CapitalizedComputerSoftwareAccumulatedAmortization

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31
Value	1624000.0	1841000.0	1719000.0	1569000.0	1334000.0	1152000.0	957000.0	851000.0	675000.0	517000.0	430000.0	526000.0	1834000.0	3727000.0	3549000.0	3474000.0	3296000.0	3140000.0	2925000.0	2934000.0	2712000.0	2552000.0	2320000.0	2179000.0	2050000.0	1912000.0	1624000.0	1445000.0	1246000.0	1165000.0	1059000.0	814000.0	710000.0	547000.0	611000.0
Percentage of CapitalizedComputerSoftwareAccumulatedAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CapitalizedComputerSoftwareGross

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31
Value	3753000.0	3815000.0	3631000.0	3491000.0	3243000.0	2872000.0	2621000.0	2449000.0	2161000.0	1922000.0	1516000.0	2790000.0	4527000.0	4190000.0	4206000.0	4230000.0	4267000.0	4246000.0	4487000.0	4445000.0	4525000.0	4557000.0	4664000.0	4621000.0	4785000.0	1142000.0	1183000.0	1144000.0	1114000.0	1246000.0	1253000.0	1242000.0	1081000.0	1194000.0
Percentage of CapitalizedComputerSoftwareGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CapitalizedComputerSoftwareNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	2129000.0	1974000.0	1912000.0	1922000.0	1909000.0	1720000.0	1664000.0	1598000.0	1486000.0	1405000.0	1050000.0	990000.0	956000.0	800000.0	641000.0	732000.0	934000.0	1127000.0	1321000.0	1553000.0	1733000.0	1973000.0	2237000.0	2485000.0	2571000.0	2873000.0	3095000.0	3315000.0	3475000.0	3690000.0	3929000.0	4180000.0	2435000.0	2334000.0	589000.0	583000.0	558000.0	625000.0	841000.0
Percentage of CapitalizedComputerSoftwareNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CapitalizedContractCostNet us-gaap:CapitalizedContractCost

us-gaap:CapitalizedContractCostNet

qada:CostsToFulfillContract

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.5	1.5	1.6	1.5	1.5
Percentage of CapitalizedContractCostNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

qada:DirectCostsOfObtainingContract

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	12	12	12	12	11	11	10	11	10	10	10	10
Percentage of CapitalizedContractCostNet	885.7	871.4	857.1	878.6	800.0	785.7	778.6	733.3	693.3	662.5	713.3	673.3

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CertificatesOfDeposit, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-01-31
Value	8.06	8.882	10	14	11
Percentage of CashAndCashEquivalentsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-01-31
Value	116	113	112	107	105
Percentage of CashAndCashEquivalentsFairValueDisclosure	1451.2	1276.3	1110.3	719.4	908.7

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

Period End	2020-10-31	2020-07-31	2020-01-31	2019-10-31	2019-07-31	2019-01-31
Value	143	140	136	133	141	139
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerAssetNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-02-01
Value	4049000.0	2195000.0	2116000.0	1809000.0	3804000.0	2458000.0	2715000.0	2058000.0	1452000.0	1372000.0	1345000.0	1000000.0
Percentage of ContractWithCustomerAssetNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerAssetNetCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-02-01
Value	3958000.0	2040000.0	1952000.0	1595000.0	3215000.0	2391000.0	2370000.0	2058000.0	1452000.0	1372000.0	1345000.0	890000.0
Percentage of ContractWithCustomerAssetNetCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerAssetNetNoncurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2018-02-01
Value	91000.0	155000.0	164000.0	214000.0	589000.0	67000.0	345000.0	110000.0
Percentage of ContractWithCustomerAssetNetNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerLiability

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	88	97	105	121	83	96	106	116	81	92	104	118
Percentage of ContractWithCustomerLiability	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31
Value	2304000.0	2424000.0	2846000.0	2811000.0	1929000.0	1893000.0	1713000.0	1465000.0	1071000.0	1054000.0	1366000.0	2156000.0
Percentage of ContractWithCustomerLiabilityNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeTaxAssetsNet

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-01-31
Value	7.354	7.095	5.838	5.834	16
Percentage of DeferredIncomeTaxAssetsNet	100.0	100.0	100.0	100.0	100.0

us-gaap:DerivativeLiabilities us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilities

us-gaap:OtherNoncurrentLiabilities, us-gaap:InterestRateSwap, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31
Value	381000.0	451000.0	483000.0	232000.0
Percentage of DerivativeLiabilities	100.0	100.0	100.0	100.0

us-gaap:DerivativeLiabilities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31
Value	381000.0	451000.0	483000.0	232000.0	216000.0	115000.0	87000.0	193000.0	177000.0	190000.0	644000.0	887000.0	705000.0	675000.0
Percentage of DerivativeLiabilities	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:PerformanceShares

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	2.8	3.4	0.1	1.3	1.9	3.5
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedStockUnitsRSU

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31
Value	24	27	17	19	21	24	16	19	20	22	10	12	14	15	9.4	9.9	11	11	8.2	9.2	10.0	10	6.7	6.2	6.7	6.8	3.2	3.5	3.9	4.1	2.7	3.0	3.2	3.6
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	885.7	817.6	17800.0	1507.7	1136.8	688.6	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-01-31	2013-04-30	2013-01-31	2012-07-31
Value	1.6	1.9	2.2	2.6	3.0	3.4	3.8	4.3	4.8	10	4.9000000000000005e-06	5.7	6.4	7.2	4.3	5.0	5.6	6.3	5.0	5.7	6.5	7.3	4.8	5.4	4.9	4.7	5.3	6.6
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	57.1	55.9	2200.0	200.0	157.9	97.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31
Value	563000.0	501000.0	420000.0	394000.0	318000.0	250000.0	181000.0	115000.0	1627000.0	1707000.0	3004000.0	2821000.0	2688000.0	2532000.0	2392000.0	2191000.0	2030000.0	1863000.0	1712000.0	1558000.0	1463000.0	1328000.0	1168000.0	978000.0	805000.0	629000.0	449000.0	279000.0	150000.0	-57000.0	0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

Period End	2020-10-31	2020-07-31	2014-01-31	2013-01-31
Value	258000.0	260000.0	716000.0	716000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

Period End	2020-10-31	2020-07-31	2017-10-31	2017-07-31	2017-04-30	2016-10-31	2016-07-31	2016-04-30
Value	65000.0	130000.0	56000.0	142000.0	253000.0	164000.0	330000.0	499000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

Period End	2020-10-31	2020-07-31
Value	147000.0	148000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

Period End	2020-10-31	2020-07-31	2016-10-31	2016-07-31	2016-04-30
Value	258000.0	260000.0	417000.0	418000.0	420000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	100.0	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsGross

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31
Value	1291000.0	1299000.0	1252000.0	1379000.0	1348000.0	1349000.0	1335000.0	1348000.0	1683000.0	1849000.0	3257000.0	3236000.0	3269000.0	3280000.0	3311000.0	3264000.0	3269000.0	3264000.0	3286000.0	3308000.0	3455000.0	3545000.0	3592000.0	3563000.0	3584000.0	3546000.0	3528000.0	3581000.0	1797000.0	1700000.0	0
Percentage of FiniteLivedIntangibleAssetsGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0

us-gaap:GoodwillGross

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31	2011-01-31
Value	27	27	27	27	27	27	27	28	27	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	27	26	26	26	26	27	24	24	22	22
Percentage of GoodwillGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31	2011-01-31
Value	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	-15.608	-15.608	-15.608	15	-15.608	-15.608	-15.608	15	15	15	15	15	15	15	15
Percentage of GoodwillImpairedAccumulatedImpairmentLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LoansPayableToBank us-gaap:DebtInstrument, us-gaap:LineOfCreditFacility

us-gaap:LoansPayableToBank

qada:Mortgage2012, qada:RabobankNa

Period End	2020-10-31	2020-07-31
Value	12	12
Percentage of LoansPayableToBank	100.0	100.0

us-gaap:NotesAndLoansPayableCurrent

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-10-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-04-30	2012-01-31	2011-10-31	2011-07-31	2011-01-31
Value	521000.0	516000.0	510000.0	503000.0	498000.0	492000.0	487000.0	487000.0	481000.0	476000.0	471000.0	466000.0	461000.0	456000.0	450000.0	446000.0	441000.0	433000.0	428000.0	422000.0	417000.0	413000.0	409000.0	406000.0	401000.0	397000.0	393000.0	389000.0	384000.0	380000.0	376000.0	372000.0	377000.0	388000.0	330000.0	321000.0	316000.0	311000.0	304000.0
Percentage of NotesAndLoansPayableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RevenueRemainingPerformanceObligation

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30
Value	269	282	270	293	232	250	254	262	214	238	237
Percentage of RevenueRemainingPerformanceObligation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:PerformanceShares

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31
Value	153000.0	153000.0	90000.0	90.0	93000.0	93000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RestrictedStockUnitsRSU

Period End	2020-10-31	2020-07-31	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-10-31	2012-07-31	2012-01-31	2011-01-31	2010-01-31
Value	703000.0	713000.0	627000.0	627000.0	633000.0	644000.0	637000.0	663000.0	647000.0	658000.0	631000.0	653000.0	662000.0	673000.0	638000.0	623.0	648000.0	556000.0	617000.0	619000.0	630000.0	556000.0	503000.0	506000.0	488000.0	413000.0	430000.0	434000.0	471000.0	367000.0	385000.0	387000.0	448000.0	414000.0	435000.0	475000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	459.5	466.0	696.7	696666.7	680.6	692.5	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-31	2017-10-31	2017-07-31	2017-04-30	2017-01-31	2016-07-31	2016-04-30	2016-01-31	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-10-31	2014-07-31	2014-04-30	2014-01-31	2013-10-31	2013-07-31	2013-04-30	2013-01-31	2012-07-31	2012-01-31	2011-01-31	2010-01-31
Value	39.98	39.86	39.61	39.55	36.83	36.64	36.47	36.22	25.16	25.1	25.07	24.98	20.78	20.56	20.51	20.94	20.91	20.89	20.84	16.88	16.27	16.27	16.09	11.1	11.02	11.02	10.88	10.6	10.49	10.34	9.32	10.02	10.74
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2020-07-31
Value	1004000.0	1005000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2020-07-31
Value	17	15
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	100.0	100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:StockAppreciationRightsSARS

Period End	2020-10-31	2020-07-31
Value	17	15
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	100.0	100.0

us-gaap:TreasuryStockShares us-gaap:StatementClassOfStock

us-gaap:TreasuryStockShares

us-gaap:CommonClassB

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-01-31
Value	216380.0	216380.0	216380.0	273470.0	273470.0	273470.0	319720.0
Percentage of TreasuryStockShares	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Line plots across dimensions of each concept

us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
(None,)

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:StatementClassOfStock
(None,)

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:StatementClassOfStock
(None,)

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:StatementClassOfStock
(None,)

us-gaap:EarningsPerShareBasic
us-gaap:StatementClassOfStock
(None,)

us-gaap:EarningsPerShareDiluted
us-gaap:StatementClassOfStock
(None,)

COGS Ratio
us-gaap:ProductOrService
(None,)

TTM Greenblatt ROC
_
(None,)

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
(None,)

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementGeographical
(None,)

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementGeographical
('srt:ReportableGeographicalComponents', None)

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
(None,)

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)

us-gaap:NetIncomeLoss
us-gaap:StatementClassOfStock
(None,)

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)

us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:ProductOrService
(None,)

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)

us-gaap:NetIncomeLoss
us-gaap:StatementClassOfStock
(None,)

QADA

Table of contents

Plots across concepts

Tables

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonClassA

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonClassA

us-gaap:CommonClassB

Preferred Stock Shares Authorized

us-gaap:PreferredStockSharesAuthorized

us-gaap:PreferredStockSharesAuthorized

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassA, us-gaap:CommonStock

us-gaap:CommonClassB, us-gaap:CommonStock

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:TreasuryStock

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:CommonClassA

us-gaap:CommonClassB

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:CommonClassA

us-gaap:CommonClassB

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:StatementClassOfStock

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CommonClassA

us-gaap:CommonClassB

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareBasic

us-gaap:CommonClassA

us-gaap:CommonClassB

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareDiluted

us-gaap:CommonClassA

us-gaap:CommonClassB

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementGeographical

srt:ReportableGeographicalComponents, srt:AsiaPacific

srt:ReportableGeographicalComponents, srt:LatinAmerica

srt:ReportableGeographicalComponents, srt:NorthAmerica

srt:ReportableGeographicalComponents, us-gaap:EMEA

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

qada:Automotive

qada:ConsumerProductsAndFoodAndBeverage

qada:HighTechnologyAndIndustrialProducts

qada:LifeSciences

qada:LifeSciencesAndOther

qada:ProfessionalServices

us-gaap:License

us-gaap:Maintenance

us-gaap:SubscriptionAndCirculation

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical

srt:AsiaPacific

srt:LatinAmerica

srt:NorthAmerica

us-gaap:EMEA

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

qada:ProfessionalServices

us-gaap:License

us-gaap:Maintenance

us-gaap:SubscriptionAndCirculation

Gross Profit