ANSS

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

NetCashProvidedByUsedInFinancingActivities

OperatingLeaseLiability

LesseeOperatingLeaseLiabilityPaymentsDue

FiniteLivedIntangibleAssets

AccountsReceivable

Tables

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:CommonStockValue	███▇▇▇▇▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▂▂▂▁	0.953	0.953	0.953	0.946	0.946	0.946	0.946	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.931	0.927	0.923	0.922	0.92	0.916	NA	NA	NA
us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock	███▆▆▆▆▁▁▁▁▁▁▁▁	95.267	95.266	95.266	94.628	94.628	94.628	94.628	93.236	93.236	93.236	93.236	93.236	93.236	93.236	93.236	NA	NA	NA	93.236	NA	NA	NA	93.236	NA	NA	NA	93.236	NA	NA	NA	93.236	NA	NA	NA	93.202	NA	NA	NA	92.652	NA	NA	NA	91.647	NA	NA	NA
us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:TreasuryStock	▁▁▄▄▅▅▅▆▆▇█▆▅▇▅	8.066	8.129	8.694	8.774	8.89	9.042	8.893	9.072	9.197	9.358	9.602	9.214	8.989	9.302	9.044	NA	NA	NA	7.548	NA	NA	NA	5.097	NA	NA	NA	2.471	NA	NA	NA	0.918	NA	NA	NA	0.536	NA	NA	NA	0.0	NA	NA	NA	0.0	NA	NA	NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding	█▁	88.053	87.986	NA	87.224	86.934	87.369	NA	85.733	85.483	85.493	NA	86.043	85.986	86.152	NA	86.588	86.895	87.224	NA	88.676	89.305	90.084	NA	91.593	91.726	92.14	NA	93.905	94.338	94.949	NA	95.265	95.04	95.166	NA	94.755	94.928	95.19	NA	94.445	94.188	94.171	NA	93.212	93.146	92.774
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic	█▁	87.168	86.808	NA	85.798	85.651	85.798	NA	84.109	83.978	83.764	NA	84.158	84.105	83.931	NA	84.774	85.167	85.456	NA	86.959	87.638	88.114	NA	89.694	89.866	90.059	NA	91.875	92.314	92.483	NA	92.541	92.86	92.908	NA	92.448	92.626	92.817	NA	92.277	91.94	91.767	NA	90.88	90.614	89.964
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	█▁	0.031	0.027	NA	0.03	0.026	0.028	NA	0.025	0.0	0.0	NA	0.0	0.0	0.0	NA	0.027	0.0	0.309	NA	0.269	0.169	0.287	NA	0.204	0.223	0.237	NA	0.237	1.191	1.205	NA	1.148	1.17	1.118	NA	1.216	1.128	1.53	NA	1.185	1.168	1.176	NA	1.748	1.735	NA
us-gaap:EarningsPerShareBasic	▃▃█▃▄▂▆▃▄▃▆▃▃▃▂▃▃▂▃▂▂▂▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂▁▁▁▁▁▂▁▁▁	1.08	0.83	2.5	0.88	1.13	0.54	1.9600000000000004	1.06	1.31	1.03	1.8200000000000003	1.06	1.1	1.0	0.6199999999999997	0.87	0.82	0.74	0.8199999999999998	0.8	0.79	0.64	0.77	0.74	0.69	0.62	0.7600000000000002	0.71	0.68	0.61	0.8199999999999998	0.67	0.6	0.55	0.6100000000000001	0.56	0.54	0.49	0.51	0.49	0.49	0.46	0.54	0.4	0.39	0.36
us-gaap:EarningsPerShareDiluted	▃▃█▃▄▂▆▃▄▃▆▃▃▃▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▂▁▁▁	1.06	0.82	2.4699999999999998	0.87	1.11	0.53	1.9100000000000001	1.04	1.28	1.01	1.79	1.04	1.08	0.98	0.6000000000000001	0.85	0.8	0.73	0.8000000000000003	0.78	0.78	0.63	0.75	0.72	0.68	0.61	0.7400000000000002	0.7	0.67	0.6	0.8	0.66	0.59	0.54	0.5900000000000001	0.54	0.53	0.48	0.5	0.48	0.48	0.45	0.5199999999999998	0.39	0.38	0.35

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
COGS Ratio us-gaap:ProductOrService us-gaap:License	▄▂█▂▃▁▅▂▃▂▄▂▂▂▃▃▂	214.822	132.604	382.057	141.622	169.341	87.83	268.943	137.144	170.499	123.044	226.421	109.103	131.147	110.046	176.596	156.58	149.88	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
COGS Ratio us-gaap:ProductOrService us-gaap:Service	▇▇█▇▇▇▇▆▆▅▅▅▄▄▂▁▁	231.832	230.622	241.629	225.343	216.32	217.155	217.285	206.755	198.136	194.086	189.011	180.315	174.766	172.827	125.74	119.005	114.044	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

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
TTM Greenblatt ROC _ _	▄▁█▃▃▁▆▃▄▃▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▂▃▂▂▂▂▂▂▂▂▂▂▂▂	116.773	50.022	259.391	90.085	112.807	34.073	185.716	105.047	128.628	95.649	179.936	93.024	108.553	95.061	100.679	106.183	98.394	85.472	96.966	100.099	94.155	85.022	96.943	90.183	86.495	80.058	94.048	90.808	83.532	79.062	92.252	81.637	78.425	69.549	81.639	73.652	71.134	67.828	73.143	65.329	64.813	62.274	65.385	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:AllocatedShareBasedCompensationExpense	█▆█▇▅▄▄▅▄▂▂▂▁	42.885	35.119	42.359	38.185	34.13	30.941	31.406	31.862	29.122	23.8	24.459	22.983	20.635	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:ComprehensiveIncomeNetOfTax	▃▂█▄▄▁▆▂▄▃▅▃▂▃▂▃▃▃▂▃▃▂▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▁▂▂	97.933	53.134	249.194	103.675	106.852	21.772	190.612	68.701	110.308	78.672	151.675	84.234	66.408	92.523	54.168	77.779	76.237	70.875	50.228	71.601	70.78	67.539	62.223	64.179	67.207	38.502	56.413	46.131	65.563	57.473	73.459	67.907	50.568	42.098	50.341	58.668	45.782	45.467	43.856	37.693	48.66	45.38	NA	NA	NA	NA
us-gaap:CostOfGoodsAndServicesSold	▇▇█▆▆▅▅▄▄▃▄▃▄▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▁▁▁▁▁	64.158	62.103	67.903	53.385	53.86	50.116	49.596	41.365	40.497	34.815	40.089	36.308	40.45	39.038	40.812	35.983	36.338	37.031	38.978	35.586	37.011	35.285	36.992	36.581	37.785	35.888	39.769	37.194	38.678	37.745	38.609	35.169	36.68	36.234	36.681	33.756	34.737	34.342	33.342	31.027	28.063	26.582	26.807	25.279	24.14	24.653
us-gaap:GrossProfit	▅▄█▄▄▃▆▄▄▄▅▃▃▃▃▃▃▃▃▃▃▂▃▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁	382.496	301.123	555.783	313.58	331.801	254.869	436.632	302.534	328.138	282.315	375.343	253.11	265.463	243.835	261.524	239.602	227.586	216.374	231.65	210.276	209.058	190.621	214.655	201.259	197.7	181.893	214.606	196.806	193.697	177.526	197.411	177.489	178.17	161.498	184.067	163.153	160.279	151.003	164.867	141.908	134.195	131.465	139.766	114.564	113.627	111.4
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	▄▁█▃▃▁▆▃▄▃▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▂▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▁	128.86	47.623	257.872	90.144	112.585	33.324	185.147	108.829	129.941	98.666	185.062	95.263	109.722	97.038	102.33	107.925	99.872	85.567	98.066	100.993	95.478	85.778	97.8	90.379	87.259	81.327	93.881	90.919	83.882	79.457	92.565	81.71	78.625	69.589	81.554	73.439	71.259	67.295	73.12	65.443	64.643	61.652	65.868	50.892	51.699	47.935
us-gaap:IncomeTaxExpenseBenefit	▇▁▇▅▅▂▅▅▅▄▆▄▅▅█▇▆▅▆▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▆▅▅▅▆▅▅▅▅▅▅▅	35.144	-24.775	42.24	14.517	16.021	-12.74	19.295	19.366	20.191	12.436	31.899	5.927	17.126	12.758	49.745	34.295	30.142	22.261	28.083	31.436	25.85	29.31	29.779	24.346	24.924	25.195	24.248	25.44	20.846	22.915	16.636	19.28	22.68	18.566	25.491	21.82	20.997	21.756	25.663	19.897	19.212	19.411	16.728	14.762	16.206	15.566
us-gaap:IncomeTaxesPaid	▂▃▂▃▁▁▂▂▅▁▂▃▄▁▃▃▅▁▃▃▆▁▃▃▅▁▃▃▅▂▃▃▄▁▃▃▄▂▂▂▃▂█▂▃▂	18.684	20.641	18.598	22.093	6.726	6.757	13.209	17.861	50.868	4.832	13.158	27.424	43.26	3.402	31.629	28.865	53.519	2.376	23.389	29.193	59.836	6.037	29.351	22.849	51.745	3.273	27.398	27.268	53.336	10.002	25.546	31.423	35.826	4.911	24.213	26.954	39.006	13.023	14.226	19.375	22.361	8.769	85.897	10.293	26.726	8.945
us-gaap:InterestExpense	▇▇▆▄▇█▇▁▁▁	3.336	3.315	2.444	1.853	3.04	3.651	2.9	0.239	0.231	0.091	NA	NA	NA	NA	NA	NA	NA	NA	0.046	0.03	0.059	0.086	-0.046	0.095	0.122	0.154	0.201	0.149	0.181	0.248	0.202	0.226	0.37	0.371	0.488	0.632	0.723	0.818	1.002	0.753	0.774	0.803	0.792	0.902	1.245	1.549
us-gaap:NetIncomeLoss	▃▃█▃▃▂▆▃▄▃▆▃▃▃▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▁▁▂▁▁▁	93.716	72.398	215.632	75.627	96.564	46.064	165.852	89.463	109.75	86.23	153.163	89.336	92.596	84.28	52.585	73.63	69.73	63.306	69.983	69.557	69.628	56.468	68.021	66.033	62.335	56.132	69.633	65.479	63.036	56.542	75.929	62.43	55.945	51.023	56.063	51.619	50.262	45.539	47.457	45.546	45.431	42.241	49.14	36.13	35.493	32.369
us-gaap:OperatingExpenses	▇▇█▆▆▆▇▅▅▅▅▄▄▄▄▃▃▃▃▂▃▂▃▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁	265.723	251.101	296.392	223.495	218.994	220.796	250.916	197.487	199.51	186.666	195.407	160.086	156.91	148.774	160.845	133.419	129.192	130.902	134.684	110.177	114.903	105.599	117.712	111.076	111.205	101.835	120.558	105.998	110.165	98.464	105.159	95.852	99.745	91.949	102.428	89.501	89.145	83.175	91.724	76.579	69.382	69.191	74.381	62.687	61.244	61.777
us-gaap:OperatingIncomeLoss	▄▁█▃▃▁▆▃▄▃▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁	116.773	50.022	259.391	90.085	112.807	34.073	185.716	105.047	128.628	95.649	179.936	93.024	108.553	95.061	100.679	106.183	98.394	85.472	96.966	100.099	94.155	85.022	96.943	90.183	86.495	80.058	94.048	90.808	83.532	79.062	92.252	81.637	78.425	69.549	81.639	73.652	71.134	67.828	73.143	65.329	64.813	62.274	65.385	51.877	52.383	49.623
us-gaap:OtherNonoperatingIncomeExpense	█▂▂▂▂▂▂▂▁▂▂▁▁▂▁▂▂▁▂▂▂▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▁▂▂▂▁▂▁▂▁	14.937	0.399	0.315	1.158	1.884	0.127	-0.294	0.594	-1.667	-0.425	1.381	-0.974	-1.007	-0.308	-0.484	-0.168	-0.19	-1.154	0.047	-0.159	0.305	-0.108	0.107	-0.383	0.091	0.767	-0.762	-0.395	-0.179	-0.198	-0.195	-0.357	-0.173	-0.321	-0.395	-0.355	-0.039	-0.616	0.175	0.078	-0.108	-0.514	0.645	-0.574	0.139	-0.507
us-gaap:ResearchAndDevelopmentExpense	███▇▇▇▆▆▆▅▄▄▄▄▃▄▃▄▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁	100.879	100.479	96.51	86.616	86.133	86.112	79.152	73.018	75.302	70.738	58.896	59.019	58.357	57.53	49.222	50.144	49.002	54.378	45.56	45.418	47.443	44.672	41.392	44.784	42.646	40.009	42.17	41.033	42.098	40.12	37.88	38.882	38.67	36.007	34.206	33.506	33.415	31.501	29.751	28.899	25.182	24.698	23.317	21.696	21.39	22.587
us-gaap:Revenues	▅▄█▄▅▃▆▄▄▄▅▃▃▃▃▃▃▃▃▃▃▂▃▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁	446.654	363.226	623.686	366.965	385.661	304.985	486.228	343.899	368.635	317.13	415.432	289.418	305.913	282.873	302.336	275.585	263.924	253.405	270.628	245.862	246.069	225.906	251.647	237.84	235.485	217.781	254.375	234.0	232.375	215.271	236.02	212.658	214.85	197.732	220.748	196.909	195.016	185.345	198.209	172.935	162.258	158.047	166.573	139.843	137.767	136.053
us-gaap:SellingGeneralAndAdministrativeExpense	▆▆█▅▅▅▇▅▅▄▅▄▄▃▄▃▃▃▃▂▂▂▃▂▂▂▃▂▂▂▂▂▂▂▂▂▂▁▂▁▁▁▂▁▁▁	160.41	146.215	195.845	132.642	128.698	130.522	167.937	120.682	120.412	112.169	133.137	97.576	95.058	87.809	108.157	80.015	77.051	73.417	85.95	61.537	64.259	57.769	71.963	61.367	63.524	56.749	72.374	58.172	62.28	53.55	62.287	51.345	55.262	50.013	61.754	49.195	48.98	45.249	56.571	43.18	40.13	40.476	46.935	36.954	35.979	35.228

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:Assets	███▆▆▅▆▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁	5890.772	5818.028	5940.59	4846.295	4671.866	4526.085	4838.887	3582.012	3512.842	3372.263	3265.964	3056.111	3058.25	2959.166	2941.623	2846.013	2760.965	2794.693	2800.526	2730.357	2747.661	2758.828	2729.904	2701.566	2746.03	2681.094	2774.103	2789.038	2799.196	2793.229	2722.382	2618.279	2576.036	2599.7	2607.417	2558.304	2513.222	2517.058	2448.47	2347.905	2237.975	2178.36	2126.876	NA	NA	NA
us-gaap:LiabilitiesAndStockholdersEquity	███▆▆▅▆▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁	5890.772	5818.028	5940.59	4846.295	4671.866	4526.085	4838.887	3582.012	3512.842	3372.263	3265.964	3056.111	3058.25	2959.166	2941.623	2846.013	2760.965	2794.693	2800.526	2730.357	2747.661	2758.828	2729.904	2701.566	2746.03	2681.094	2774.103	2789.038	2799.196	2793.229	2722.382	2618.279	2576.036	2599.7	2607.417	2558.304	2513.222	2517.058	2448.47	2347.905	2237.975	2178.36	2126.876	NA	NA	NA
us-gaap:StockholdersEquity	███▆▆▆▆▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁	4250.218	4111.969	4097.872	3589.613	3438.048	3292.35	3453.379	2923.324	2817.286	2684.381	2649.547	2548.546	2507.479	2407.36	2245.831	2287.254	2189.415	2211.445	2208.405	2229.765	2235.86	2233.903	2194.427	2211.596	2241.305	2151.265	2217.501	2255.8	2219.816	2208.12	2136.246	2088.298	1997.835	2005.888	1940.291	1896.49	1820.849	1820.893	1754.473	1693.017	1640.294	1576.633	1529.929	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:AssetsCurrent	▇██▆▅▅▇▅▄▄▅▄▄▅▅▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁▂▂▂	1622.364	1660.952	1719.237	1458.721	1294.264	1290.7	1555.48	1206.226	1133.345	1062.811	1311.177	1127.567	1142.985	1327.329	1270.266	1201.674	1145.68	1182.069	1169.401	1100.151	1109.742	1118.679	1076.426	1045.264	1110.355	1029.288	1110.493	1075.02	1064.657	1132.262	1067.596	959.956	915.484	931.608	913.359	825.831	841.153	830.802	740.033	626.427	854.251	784.745	714.633	NA	NA	NA
us-gaap:Cash	▇▇▇▇▆█▇▅▄▄▃▃▂▇▇▇▆▆▆▆▆▆▅▅▅▄▆▅▅▆▅▄▄▄▃▂▂▂▂▁▁	556.074	548.833	571.587	536.778	518.734	599.137	549.639	431.624	381.218	379.831	331.084	332.097	305.154	560.67	568.587	528.134	487.424	511.2	488.504	503.107	488.6	521.033	427.244	423.132	431.664	421.023	506.731	447.892	442.11	472.734	439.348	400.468	391.906	396.816	369.724	284.339	288.54	279.961	289.298	242.912	243.305	NA	170.765	NA	NA	NA
us-gaap:CashAndCashEquivalentsAtCarryingValue	██▇▆▅▅▇▅▄▄▆▅▅▇▇▇▆▇▆▆▆▇▆▆▆▅▆▆▆▆▅▅▄▄▃▃▃▃▂▁▄▃▂▂▁▁	957.704	987.427	912.672	844.741	744.546	717.748	872.094	732.684	631.455	607.391	777.139	729.18	695.894	885.493	881.501	919.571	857.996	866.188	822.479	837.916	843.355	863.435	784.168	776.239	840.354	760.394	788.064	816.805	782.915	857.684	742.486	707.334	659.403	650.993	576.703	554.887	551.484	557.846	471.828	406.298	629.712	549.934	472.479	494.716	415.488	389.24
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	▇█▇▅▄▃▆▃▁▁▄▃▃	957.704	987.427	912.672	844.741	744.546	717.748	872.094	732.684	631.455	607.391	777.139	729.18	695.894	NA	881.501	NA	NA	NA	822.479	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:ShortTermInvestments	▁▁▁▁▁▁▁▁▁▁▁▁▁▅▁█▆▁▁▁▁▁▁▁▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁	0.504	0.516	0.479	0.468	0.433	0.282	0.288	0.218	0.241	0.237	0.225	0.211	0.269	4.275	0.286	7.064	5.486	0.368	0.381	0.356	0.41	0.442	0.446	0.684	0.816	0.789	0.714	0.665	0.644	0.559	0.5	0.44	0.461	0.488	0.452	0.454	0.468	0.599	0.576	0.582	0.548	0.535	0.455	NA	NA	NA
us-gaap:AccountsReceivableNetCurrent	▇▆█▆▅▅▆▄▄▄▅▄▄▄▂▁▁▁▂▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁	449.664	394.289	537.564	371.352	343.247	337.105	433.479	295.59	297.798	268.526	317.7	235.547	258.28	256.56	124.659	91.356	83.223	92.332	107.192	85.273	85.506	82.498	91.579	91.47	87.96	80.949	101.229	83.253	88.544	83.418	97.845	79.912	84.101	80.291	96.598	77.861	83.935	79.506	84.602	65.084	68.807	71.049	76.604	NA	NA	NA
us-gaap:OtherAssetsCurrent	▅██▆▄▆▇▃▄▄▅▂▄▃▇▃▄▅▆▃▃▃▄▂▂▃▄▂▃▃▄▂▂▃▅▃▄▃▂▁▁▂▂	214.492	278.72	268.522	242.16	206.038	235.565	249.619	177.734	203.851	186.657	216.113	162.629	188.542	181.001	263.82	183.683	198.975	223.181	239.349	176.606	180.471	172.304	200.233	148.16	158.94	167.856	192.308	148.069	168.221	169.133	200.734	148.652	151.046	183.806	216.268	171.237	187.24	175.656	163.296	134.191	134.561	146.447	147.402	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:AssetsNoncurrent	███▅▅▅▅▂▂▂▁	4268.408	4157.076	4221.353	3387.574	3377.602	3235.385	3283.407	2375.786	2379.497	2309.452	1954.787	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
us-gaap:PropertyPlantAndEquipmentGross		NA	NA	238.775	NA	NA	NA	212.739	NA	NA	NA	183.201	NA	NA	NA	173.92	NA	NA	NA	156.901	NA	NA	NA	160.664	NA	NA	NA	151.016	NA	NA	NA	136.218	NA	NA	NA	115.535	NA	NA	NA	106.549	NA	NA	NA	90.326	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovements		NA	NA	38.332	NA	NA	NA	38.095	NA	NA	NA	27.352	NA	NA	NA	26.423	NA	NA	NA	25.472	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:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:Equipment		NA	NA	123.139	NA	NA	NA	105.428	NA	NA	NA	92.409	NA	NA	NA	88.189	NA	NA	NA	78.614	NA	NA	NA	78.932	NA	NA	NA	75.5	NA	NA	NA	68.97	NA	NA	NA	59.58	NA	NA	NA	55.221	NA	NA	NA	41.998	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixtures		NA	NA	14.902	NA	NA	NA	12.766	NA	NA	NA	10.846	NA	NA	NA	9.239	NA	NA	NA	8.618	NA	NA	NA	8.601	NA	NA	NA	8.475	NA	NA	NA	4.973	NA	NA	NA	4.457	NA	NA	NA	5.007	NA	NA	NA	4.577	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:Land		NA	NA	2.696	NA	NA	NA	2.696	NA	NA	NA	1.759	NA	NA	NA	1.759	NA	NA	NA	1.759	NA	NA	NA	1.759	NA	NA	NA	2.14	NA	NA	NA	2.178	NA	NA	NA	2.178	NA	NA	NA	1.749	NA	NA	NA	1.368	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovements		NA	NA	25.237	NA	NA	NA	19.876	NA	NA	NA	15.782	NA	NA	NA	13.316	NA	NA	NA	11.571	NA	NA	NA	12.621	NA	NA	NA	10.368	NA	NA	NA	8.125	NA	NA	NA	7.334	NA	NA	NA	7.394	NA	NA	NA	6.566	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareAndSoftwareDevelopmentCosts		NA	NA	34.469	NA	NA	NA	33.878	NA	NA	NA	35.053	NA	NA	NA	34.994	NA	NA	NA	30.867	NA	NA	NA	33.71	NA	NA	NA	30.007	NA	NA	NA	27.647	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment		NA	NA	142.272	NA	NA	NA	129.103	NA	NA	NA	121.546	NA	NA	NA	116.824	NA	NA	NA	102.224	NA	NA	NA	98.74	NA	NA	NA	86.373	NA	NA	NA	75.68	NA	NA	NA	63.282	NA	NA	NA	60.911	NA	NA	NA	53.405	NA	NA	NA
us-gaap:AmortizationOfIntangibleAssets	▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▃▄▅▅▇█▆▄▅▆▆▆▇██▇▅▄▃▃▃▃▂▃	4.434	4.407	4.037	4.237	4.163	4.162	3.827	3.787	3.796	3.759	3.374	3.491	3.495	3.435	3.466	3.26	3.139	3.107	3.174	3.222	3.201	3.158	4.357	4.925	5.035	5.077	6.014	6.793	5.787	4.794	4.992	5.625	5.813	5.929	6.468	6.8	6.75	6.425	5.402	4.5	4.07	4.017	4.129	4.037	3.875	3.962
us-gaap:PropertyPlantAndEquipmentNet	▇██▇▇▆▆▅▅▄▄▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▁▁▁▁	91.872	93.207	96.503	90.299	88.792	82.471	83.636	70.295	68.294	63.301	61.655	57.902	56.501	55.806	57.096	57.16	53.93	54.513	54.677	55.628	58.095	60.151	61.924	58.59	60.664	62.496	64.643	65.099	62.487	59.631	60.538	54.952	50.279	50.822	52.253	51.178	51.659	46.809	45.638	40.251	38.529	37.436	36.921	NA	NA	NA
us-gaap:Goodwill	███▆▆▆▆▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁	3110.736	3036.783	3038.306	2491.59	2474.299	2398.684	2413.28	1771.862	1775.734	1748.228	1572.455	1575.567	1575.276	1379.458	1378.553	1353.444	1342.968	1340.391	1337.215	1333.531	1333.397	1334.129	1332.348	1334.509	1312.121	1315.045	1312.182	1313.754	1317.189	1262.965	1255.704	1255.275	1253.971	1250.038	1251.247	1252.706	1228.068	1229.629	1225.375	1229.872	1035.583	1035.342	1035.083	NA	NA	NA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill	▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	14.157	NA	NA	14.157	24.667	24.62	24.506	25.064	25.147	25.073	22.257	22.257	22.257	19.857	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill	███▅▅▅▅▃▃▃▂▂▂▁▁▁▁▁▁▁▂▂▂▂▂▂▂▃▃▃▃▃▃▃▄▄▄▄▄▄▂▃▃	689.398	677.357	694.865	474.785	481.694	458.136	476.711	267.378	282.07	278.327	211.272	219.564	229.654	146.396	157.625	154.996	153.639	164.112	172.619	184.768	196.933	209.677	220.553	233.262	232.849	244.777	259.312	277.514	298.205	286.803	291.39	305.833	318.294	331.938	351.173	368.98	348.723	365.622	383.42	396.645	257.388	267.392	278.32	NA	NA	NA
us-gaap:FiniteLivedIntangibleAssetsNet	█▇█▁	689.041	677.0	694.508	474.428	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	NA	NA	NA	NA	NA
us-gaap:OperatingLeaseRightOfUseAsset	▇▇█▇▇▇▆▆▆▆▁	125.323	125.635	137.73	115.705	117.242	120.831	105.671	104.16	104.509	99.991	0.0	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
us-gaap:OtherAssetsNoncurrent	█▇█▇▇▆▆▅▅▄▃▃▂▂▂▂▂▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▃	228.207	201.675	225.119	189.227	191.326	152.521	180.032	134.757	124.384	97.699	82.775	53.226	39.101	34.731	35.972	33.633	25.639	19.122	24.287	17.271	16.926	5.966	5.757	5.665	6.079	6.346	6.187	4.074	5.703	8.19	10.586	13.206	15.851	19.594	24.393	45.813	31.942	34.863	46.942	48.858	49.265	51.485	56.123	NA	NA	NA
us-gaap:EquitySecuritiesFvNi	▄	3.078	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	NA	NA	NA	NA	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:AccountsPayableCurrent	▄▇█▅▅▅▆▄▄▅▃▃▃▃▃▂▂▂▃▂▂▂▂▁▂▂▂▁▂▂▃▁▁▁▂▂▂▂▃▂▂▂▁	9.608	16.97	18.691	10.578	10.505	12.571	14.298	8.172	9.865	11.502	7.953	6.767	7.598	7.259	6.042	4.257	5.245	4.839	7.395	3.996	4.218	4.302	4.865	3.22	4.786	3.689	3.421	3.225	4.551	5.272	7.939	3.349	3.384	3.387	4.924	4.054	3.892	5.572	6.987	4.423	4.537	4.321	2.241	NA	NA	NA
us-gaap:AccruedIncomeTaxesCurrent	▃▂▇██▃▃▂▃▄▃▂▂▂▂▁▁▂▂▁▁▅▂▁▁▄▂▂▂▅▃▂▂▂▂▂▂▂▂▂▁▁▂	8.98	6.26	26.116	29.57	28.291	9.689	9.996	7.278	9.264	15.694	8.726	5.911	5.7	4.87	5.76	4.436	4.129	6.688	5.263	3.299	3.124	16.79	4.695	3.0	3.875	14.576	7.127	6.094	5.737	16.916	9.333	7.444	5.909	6.674	8.182	7.875	7.874	7.669	6.213	6.575	2.568	3.427	6.179	NA	NA	NA
us-gaap:AccruedLiabilitiesCurrent	▅▄█▃▃▁▄	119.568	95.665	154.31	86.176	89.415	61.254	106.549	NA	97.048	NA	79.075	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
us-gaap:ContractWithCustomerLiabilityCurrent	▆██▅▅▇▇▂▄▅▅▁▃	338.396	366.596	372.061	326.491	325.098	352.964	351.353	291.385	321.06	330.89	328.584	272.872	306.879	NA	440.491	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:LiabilitiesCurrent	▆▆█▅▅▅▇▄▄▄▅▃▃▃▆▄▄▅▅▃▄▄▄▃▃▃▄▃▃▃▃▂▃▃▄▃▄▃▃▂▂▁▁	595.385	624.047	728.825	561.847	543.806	537.142	695.14	473.83	505.666	503.41	524.767	415.439	435.001	442.092	608.553	496.352	514.787	528.726	539.1	454.437	467.71	474.824	484.146	411.957	430.31	444.111	465.099	407.28	447.037	441.747	440.431	386.956	425.666	419.306	477.387	453.107	463.917	457.016	438.751	371.479	347.457	330.526	311.369	NA	NA	NA
us-gaap:LongTermDebtCurrent		NA	4.688	NA	NA	0.0	0.0	75.0	NA	NA	NA	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.0	26.574	26.574	53.149	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OperatingLeaseLiabilityCurrent	█▆▇▁	24.0	23.0	23.6	20.2	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	NA	NA	NA	NA	NA
us-gaap:OtherAccruedLiabilitiesCurrent	▇██▅▅▅▅▄▅▅▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁	186.545	204.622	199.466	142.856	142.27	139.497	142.947	111.633	123.23	124.818	99.559	83.169	82.304	95.053	86.335	65.557	65.839	81.486	73.676	56.305	60.637	60.952	63.801	53.85	62.328	65.879	74.862	63.939	74.279	69.66	69.343	60.102	61.863	59.159	61.329	54.376	54.671	55.053	55.809	46.05	43.901	44.878	41.247	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:LiabilitiesNoncurrent	███▅▅▅▅▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▃▂▂▃	1045.169	1082.012	1113.893	694.835	690.012	696.593	690.368	184.858	189.89	184.472	91.65	92.126	115.77	109.714	87.239	62.407	56.763	54.522	53.021	46.155	44.091	50.101	51.331	78.013	74.415	85.718	91.503	126.041	132.387	142.769	145.705	143.025	152.535	174.506	189.739	208.707	228.456	239.149	255.246	283.409	250.224	271.201	285.578	NA	NA	NA
us-gaap:LongTermDebtNoncurrent	▇██▁▁▁▁	753.327	793.515	798.118	423.759	423.683	423.607	423.531	NA	NA	NA	0.0	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
us-gaap:DeferredIncomeTaxLiabilitiesNet	▇▇█▄▄▄▅▁▁	103.649	102.221	110.321	63.729	66.661	69.778	78.643	31.201	36.482	NA	30.077	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
us-gaap:OtherLiabilitiesNoncurrent	▅▅▅▇▆▆▆▃▃▃▃▃▅▅▅▃▂▂▂▁▁▁▂▂▁▂▂▂▂▃▃▃▄▆▇███▇▆▄▅▅	79.986	76.822	84.514	105.406	96.083	96.173	96.426	62.484	62.988	58.843	61.573	62.171	76.998	80.865	85.778	60.614	54.487	52.295	50.762	44.494	41.931	43.53	49.24	48.617	45.294	50.81	54.113	52.861	54.306	60.819	60.67	60.688	67.319	90.854	96.917	111.538	106.923	107.533	100.479	93.995	74.224	83.797	82.989	NA	NA	NA
us-gaap:OperatingLeaseLiabilityNoncurrent	▅▅█▃▄▅▁	108.207	109.454	120.94	101.941	103.585	107.035	91.768	NA	NA	87.259	0.0	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
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	▂▁█▃	20.018	19.027	24.712	20.424	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	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree	▅▄█▁	18.734	17.956	21.522	15.516	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	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour	▅▄█▁	17.708	16.877	20.264	14.661	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	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive		NA	NA	17.076	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	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive		NA	NA	50.438	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	NA	NA	NA	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:StockholdersEquity	███▆▆▆▆▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁	4250.218	4111.969	4097.872	3589.613	3438.048	3292.35	3453.379	2923.324	2817.286	2684.381	2649.547	2548.546	2507.479	2407.36	2245.831	2287.254	2189.415	2211.445	2208.405	2229.765	2235.86	2233.903	2194.427	2211.596	2241.305	2151.265	2217.501	2255.8	2219.816	2208.12	2136.246	2088.298	1997.835	2005.888	1940.291	1896.49	1820.849	1820.893	1754.473	1693.017	1640.294	1576.633	1529.929	NA	NA	NA
us-gaap:CommonStockValue	███▇▇▇▇▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▂▂▂▁	0.953	0.953	0.953	0.946	0.946	0.946	0.946	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.931	0.927	0.923	0.922	0.92	0.916	NA	NA	NA
us-gaap:AdditionalPaidInCapital	▇▇█▅▅▄▅▁▁▁▁▁▁▁▂▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁	1381.59	1346.601	1434.203	1182.127	1144.193	1118.17	1188.939	865.634	839.696	824.997	867.462	850.616	837.324	833.414	873.357	865.43	855.782	853.478	883.01	884.461	884.675	882.438	894.469	891.92	888.537	891.079	904.825	911.377	916.988	915.997	926.031	921.78	921.623	916.336	927.368	935.375	934.976	926.611	905.662	888.066	873.037	869.136	856.718	NA	NA	NA
us-gaap:RetainedEarningsAccumulatedDeficit	███▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁	3970.707	3876.991	3804.593	3588.961	3513.334	3416.77	3370.706	3204.854	3115.391	3005.641	2919.411	2766.259	2676.924	2584.328	2316.916	2264.331	2190.701	2120.971	2057.665	1987.682	1918.125	1848.497	1792.029	1724.008	1657.975	1595.64	1539.508	1469.875	1404.396	1341.36	1284.818	1208.889	1146.459	1090.514	1039.491	983.428	931.809	881.547	836.008	788.551	743.005	697.574	655.333	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax	▅▄▅▃▂▁▃▁▂▂▃▃▃▅▄▄▄▃▃▄▄▄▃▄▄▄▅▅▇▆▆▇▆▇▇▇▇▇▇████	-32.822	-37.039	-17.775	-51.337	-79.385	-89.673	-65.381	-90.141	-69.379	-69.937	-62.379	-60.891	-55.789	-29.601	-37.844	-39.427	-43.576	-50.083	-57.652	-37.897	-39.941	-41.093	-52.164	-46.366	-44.512	-49.384	-31.754	-18.534	0.814	-1.713	-2.644	-0.174	-5.651	-0.274	8.651	14.373	7.324	11.804	11.876	15.477	23.33	20.101	16.962	NA	NA	NA
us-gaap:TreasuryStockValue	▇█████▇▇▇██▇▇▇▇▆▆▅▅▅▄▄▄▃▃▃▂▂▂▁▁▁▁▁▁▁▁	1070.21	1075.537	1124.102	1131.084	1141.04	1153.863	1041.831	1057.955	1069.354	1077.252	1075.879	1008.37	951.912	981.713	907.53	804.012	814.424	713.853	675.55	605.413	527.931	456.871	440.839	358.898	261.627	287.002	196.01	107.85	103.314	48.456	72.891	43.129	65.528	1.62	36.151	37.618	54.192	NA	0.0	NA	NA	11.098	0.0	NA	NA	NA

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities	▆██▅▇▇▇▆▅▇▇▆▆▇▆▅▆▆▅▅▄▆▆▅▄▆▅▅▅▇▅▄▅▅▄▄▅▅▅▄▅▅▁▄▄▄	118.877	171.107	173.767	94.539	131.592	147.412	139.451	120.368	88.539	151.578	132.934	109.961	111.121	132.421	103.478	88.885	112.182	125.893	96.234	81.989	70.029	108.575	109.196	77.795	66.412	114.12	92.273	81.562	79.833	131.639	84.961	65.44	87.148	95.434	69.588	70.361	74.869	83.597	77.614	66.278	78.91	84.859	-25.265	72.263	60.155	59.731
us-gaap:NetCashProvidedByUsedInInvestingActivities	▇█▁█▆█▁█▇▄██▄█▇▇███████▇████▇██████▇███▄██████	-100.461	-15.863	-483.663	-11.024	-109.967	-9.599	-500.1	-22.171	-59.594	-251.683	-12.067	-6.36	-288.017	-7.236	-35.82	-36.373	-14.365	-10.885	-12.599	-3.25	-13.633	-2.691	-10.373	-33.49	-4.003	-14.166	-5.956	-8.746	-92.035	-22.533	-14.756	-5.469	-8.835	-4.117	-4.791	-49.911	-9.51	-4.744	-9.311	-274.634	-4.28	-3.418	-4.439	-4.714	-2.474	4.979
us-gaap:NetCashProvidedByUsedInFinancingActivities	▃▃▇▄▄▁█▄▄▃▃▃▄▂▃▄▃▃▃▃▃▃▃▃▄▃▃▃▃▄▃▃▃▃▃▃▃▄▄▄▄▃▄▄▃▃	-47.895	-74.208	372.443	9.705	3.187	-288.738	499.445	5.522	-6.467	-69.091	-75.392	-66.074	8.196	-129.405	-109.277	5.328	-112.368	-78.334	-79.621	-86.23	-77.425	-36.201	-86.313	-106.535	12.62	-111.523	-103.673	-23.271	-64.199	5.501	-34.069	-16.294	-67.513	-11.883	-41.762	-20.972	-64.514	2.402	0.332	-5.017	4.238	-9.229	8.452	-1.34	-28.384	-8.367
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	▄▇▆▇▅▁█▇▅▁▆▆	-29.723	74.755	67.931	100.195	26.798	-154.346	139.41	101.229	24.064	-169.748	47.959	33.286	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

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit	▄▄▃▄▃▄▅▄▄▅▄▁▃▅▆▃▄█▃▄▄█▃▃▄▇▄▃▄▆▄▂▄▅▄▄▃▆▅▄▅▆▄▃▃▄	-5.546	-3.564	-8.305	-6.943	-10.242	-5.442	-1.29	-6.983	-4.851	-1.387	-5.5	-16.232	-8.698	-3.245	1.524	-8.908	-4.6	9.291	-7.819	-6.484	-5.294	8.676	-7.895	-10.576	-3.841	7.116	-5.161	-7.729	-6.325	0.356	-5.841	-10.826	-6.473	-0.885	-6.217	-6.783	-7.685	1.789	0.014	-3.896	-2.177	3.038	-6.068	-8.756	-7.864	-4.031
us-gaap:IncreaseDecreaseInAccountsReceivable	▅▁█▄▅▂▇▄▅▃▆▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄	66.868	-159.038	222.503	17.26	38.386	-117.83	141.793	9.661	46.932	-43.983	106.811	-4.832	-5.017	-22.507	32.305	6.996	-9.835	-15.06	23.989	-0.48	3.739	-9.86	0.663	4.545	7.155	-18.407	19.647	-2.753	3.998	-15.338	18.165	-4.506	4.464	-15.14	22.985	-10.229	5.277	-5.632	20.158	-2.444	-2.824	-6.804	23.114	-11.719	-2.069	1.823
us-gaap:NetCashProvidedByUsedInOperatingActivities	▆██▅▇▇▇▆▅▇▇▆▆▇▆▅▆▆▅▅▄▆▆▅▄▆▅▅▅▇▅▄▅▅▄▄▅▅▅▄▅▅▁▄▄▄	118.877	171.107	173.767	94.539	131.592	147.412	139.451	120.368	88.539	151.578	132.934	109.961	111.121	132.421	103.478	88.885	112.182	125.893	96.234	81.989	70.029	108.575	109.196	77.795	66.412	114.12	92.273	81.562	79.833	131.639	84.961	65.44	87.148	95.434	69.588	70.361	74.869	83.597	77.614	66.278	78.91	84.859	-25.265	72.263	60.155	59.731
us-gaap:NetIncomeLoss	▃▃█▃▃▂▆▃▄▃▆▃▃▃▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▁▁▂▁▁▁	93.716	72.398	215.632	75.627	96.564	46.064	165.852	89.463	109.75	86.23	153.163	89.336	92.596	84.28	52.585	73.63	69.73	63.306	69.983	69.557	69.628	56.468	68.021	66.033	62.335	56.132	69.633	65.479	63.036	56.542	75.929	62.43	55.945	51.023	56.063	51.619	50.262	45.539	47.457	45.546	45.431	42.241	49.14	36.13	35.493	32.369
us-gaap:ShareBasedCompensation	█▇█▇▆▆▆▆▅▅▅▄▄▃▃▃▃▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁	42.885	35.119	42.359	38.185	34.13	30.941	31.406	31.862	29.122	23.8	24.459	22.983	20.635	15.269	13.746	14.773	14.122	10.513	8.783	8.952	8.534	7.078	8.22	8.87	9.03	7.831	9.278	9.953	10.165	7.465	8.556	9.081	8.874	8.787	8.485	8.104	8.024	7.802	6.514	6.108	5.319	5.147	5.116	4.743	4.656	4.504

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities	▇█▁█▆█▁█▇▄██▄█▇▇███████▇████▇██████▇███▄██████	-100.461	-15.863	-483.663	-11.024	-109.967	-9.599	-500.1	-22.171	-59.594	-251.683	-12.067	-6.36	-288.017	-7.236	-35.82	-36.373	-14.365	-10.885	-12.599	-3.25	-13.633	-2.691	-10.373	-33.49	-4.003	-14.166	-5.956	-8.746	-92.035	-22.533	-14.756	-5.469	-8.835	-4.117	-4.791	-49.911	-9.51	-4.744	-9.311	-274.634	-4.28	-3.418	-4.439	-4.714	-2.474	4.979
us-gaap:PaymentsToAcquireProductiveAssets	▃▂▅▃▄▃█▄▄▃▄▃▂▁▂▃▂▂▂▁▂▁▂▁▂▂▂▄▃▂▆▂▂▂▃▂▄▂▄▂▂▂▂▂▁▁	5.79	5.045	11.175	7.228	9.98	6.987	19.159	8.835	10.046	6.9	8.685	6.326	3.818	2.933	4.334	7.313	3.445	4.057	4.224	2.151	3.373	2.695	5.38	3.083	4.06	3.622	5.395	8.705	7.831	4.092	14.701	5.467	4.593	4.087	6.095	3.552	9.587	4.743	9.539	4.919	4.264	3.341	5.105	4.736	2.549	1.87

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities	▃▃▇▄▄▁█▄▄▃▃▃▄▂▃▄▃▃▃▃▃▃▃▃▄▃▃▃▃▄▃▃▃▃▃▃▃▄▄▄▄▃▄▄▃▃	-47.895	-74.208	372.443	9.705	3.187	-288.738	499.445	5.522	-6.467	-69.091	-75.392	-66.074	8.196	-129.405	-109.277	5.328	-112.368	-78.334	-79.621	-86.23	-77.425	-36.201	-86.313	-106.535	12.62	-111.523	-103.673	-23.271	-64.199	5.501	-34.069	-16.294	-67.513	-11.883	-41.762	-20.972	-64.514	2.402	0.332	-5.017	4.238	-9.229	8.452	-1.34	-28.384	-8.367
us-gaap:PaymentsForRepurchaseOfCommonStock		NA	NA	0.0	0.0	0.0	161.029	0.0	0.0	14.26	44.856	77.014	74.956	0.0	117.831	112.751	0.0	122.939	100.352	93.047	114.528	86.076	42.684	95.162	114.032	3.089	125.627	125.18	36.517	72.096	0.0	42.675	0.0	NA	NA	33.886	0.0	61.591	0.0	0.0	0.0	0.0	12.704	0.0	0.0	0.0	0.0

		2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31

Common Stock Value

us-gaap:CommonStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	953000.0	953000.0	953000.0	946000.0	946000.0	946000.0	946000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	931000.0	927000.0	923000.0	922000.0	920000.0	916000.0	897000.0
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	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	0.0	0.0	0.0	0.0	0.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31
Value	95	95	95	94	94	94	94	93	93	93	93	93	93	93	93	93	93	93	93	93	92	91	89	89
Percentage of SharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31
Value	8.066	8.129	8.694	8.774	8.89	9.042	8.893	9.072	9.197	9.358	9.602	9.214	8.989	9.302	9.044	7.548	5.097	2.471	0.918	0.536	0.0	0.0	0.041	0.337
Percentage of SharesOutstanding	8.5	8.5	9.1	9.3	9.4	9.6	9.4	9.7	9.9	10.0	10.3	9.9	9.6	10.0	9.7	8.1	5.5	2.7	1.0	0.6	0.0	0.0	0.0	0.4

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30	2015-03-31	2014-09-30	2014-06-30	2014-03-31	2013-09-30	2013-06-30	2013-03-31	2012-09-30	2012-06-30	2012-03-31	2011-09-30	2011-06-30	2011-03-31	2010-09-30	2010-06-30	2010-03-31
Value	88	87	87	86	87	85	85	85	86	85	86	86	86	87	88	89	90	91	91	92	93	94	94	95	95	95	94	94	95	94	94	94	93	93	92
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	100.0	100.0	100.0	100.0	100.0	100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30	2015-03-31	2014-09-30	2014-06-30	2014-03-31	2013-09-30	2013-06-30	2013-03-31	2012-09-30	2012-06-30	2012-03-31	2011-09-30	2011-06-30	2011-03-31	2010-09-30	2010-06-30	2010-03-31
Value	87	86	85	85	85	84	83	83	84	84	83	84	85	85	86	87	88	89	89	90	91	92	92	92	92	92	92	92	92	92	91	91	90	90	89
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	100.0	100.0	100.0	100.0	100.0	100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-09-30	2016-06-30	2016-03-31	2015-09-30	2015-06-30	2015-03-31	2014-09-30	2014-06-30	2014-03-31	2013-09-30	2013-06-30	2013-03-31	2012-09-30	2012-06-30	2012-03-31	2011-09-30	2011-06-30	2011-03-31	2010-09-30	2010-06-30
Value	31000.0	27000.0	30000.0	26000.0	28000.0	25000.0	0	0	0	0	0	27000.0	0	309000.0	269000.0	169000.0	287000.0	204000.0	223000.0	237000.0	237000.0	1191000.0	1205000.0	1148000.0	1170000.0	1118000.0	1216000.0	1128000.0	1530000.0	1185000.0	1168000.0	1176000.0	1748000.0	1735000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	0.0	0.0	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

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	1.08	0.83	2.5	0.88	1.13	0.54	1.96	1.06	1.31	1.03	1.82	1.06	1.1	1.0	0.62	0.87	0.82	0.74	0.82	0.8	0.79	0.64	0.77	0.74	0.69	0.62	0.76	0.71	0.68	0.61	0.82	0.67	0.6	0.55	0.61	0.56	0.54	0.49	0.51	0.49	0.49	0.46	0.54	0.4	0.39	0.36
Percentage of EarningsPerShareBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	1.06	0.82	2.47	0.87	1.11	0.53	1.91	1.04	1.28	1.01	1.79	1.04	1.08	0.98	0.6	0.85	0.8	0.73	0.8	0.78	0.78	0.63	0.75	0.72	0.68	0.61	0.74	0.7	0.67	0.6	0.8	0.66	0.59	0.54	0.59	0.54	0.53	0.48	0.5	0.48	0.48	0.45	0.52	0.39	0.38	0.35
Percentage of EarningsPerShareDiluted	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	42	35	42	38	34	30	31	31	29	23	24	22	20
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
Percentage of Revenues	9.6	9.7	6.8	10.4	8.8	10.1	6.5	9.3	7.9	7.5	5.9	7.9	6.7

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:GeneralAndAdministrativeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	23	17	23	18	16	15	16	16	14	13	13	13	11	8.278
Percentage of AllocatedShareBasedCompensationExpense	54.8	49.0	54.5	49.6	47.8	48.9	51.7	52.6	49.8	55.2	56.5	58.7	55.9	0.0
Percentage of Revenues	5.3	4.7	3.7	5.2	4.2	5.0	3.3	4.9	3.9	4.1	3.3	4.7	3.8	2.9
Percentage of Revenues 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

us-gaap:ResearchAndDevelopmentExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	15	14	15	15	14	12	12	12	12	9.441	9.304	8.061	7.677	5.981
Percentage of AllocatedShareBasedCompensationExpense	37.0	40.8	36.9	40.9	42.0	41.8	40.5	39.8	42.0	39.7	38.0	35.1	37.2	0.0
Percentage of Revenues	3.5	3.9	2.5	4.3	3.7	4.2	2.6	3.7	3.3	3.0	2.2	2.8	2.5	2.1
Percentage of Revenues 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

us-gaap:Service

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	3.519	3.562	3.67	3.626	3.464	2.866	2.47	2.422	2.374	1.228	1.344	1.438	1.432
Percentage of AllocatedShareBasedCompensationExpense	8.2	10.1	8.7	9.5	10.1	9.3	7.9	7.6	8.2	5.2	5.5	6.3	6.9
Percentage of Revenues	0.8	1.0	0.6	1.0	0.9	0.9	0.5	0.7	0.6	0.4	0.3	0.5	0.5
Percentage of Revenues us-gaap:Service	0.0	0.0	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	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31
Value	97	53	249	103	106	21	190	68	110	78	151	84	66	92	54	77	76	70	50	71	70	67	62	64	67	38	56	46	65	57	73	67	50	42	50	58	45	45	43	37	48	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	100.0	100.0	100.0
Percentage of Revenues	21.9	14.6	40.0	28.3	27.7	7.1	39.2	20.0	29.9	24.8	36.5	29.1	21.7	32.7	17.9	28.2	28.9	28.0	18.6	29.1	28.8	29.9	24.7	27.0	28.5	17.7	22.2	19.7	28.2	26.7	31.1	31.9	23.5	21.3	22.8	29.8	23.5	24.5	22.1	21.8	30.0	28.7

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	64	62	67	53	53	50	49	41	40	34	40	36	40	39	40	35	36	37	38	35	37	35	36	36	37	35	39	37	38	37	38	35	36	36	36	33	34	34	33	31	28	26	26	25	24	24
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	100.0	100.0	100.0	100.0
Percentage of Revenues	14.4	17.1	10.9	14.5	14.0	16.4	10.2	12.0	11.0	11.0	9.6	12.5	13.2	13.8	13.5	13.1	13.8	14.6	14.4	14.5	15.0	15.6	14.7	15.4	16.0	16.5	15.6	15.9	16.6	17.5	16.4	16.5	17.1	18.3	16.6	17.1	17.8	18.5	16.8	17.9	17.3	16.8	16.1	18.1	17.5	18.1

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:License

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	8.065	7.606	9.93	7.251	8.511	4.926	7.324	5.708	6.204	4.708	6.318	4.291	4.099	3.911	10	7.395	7.525
Percentage of CostOfGoodsAndServicesSold	12.6	12.2	14.6	13.6	15.8	9.8	14.8	13.8	15.3	13.5	15.8	11.8	10.1	10.0	25.1	20.6	20.7
Percentage of Revenues	1.8	2.1	1.6	2.0	2.2	1.6	1.5	1.7	1.7	1.5	1.5	1.5	1.3	1.4	3.4	2.7	2.9
Percentage of Revenues us-gaap:License	3.8	5.7	0.0	5.1	5.0	5.6	0.0	4.2	3.6	3.8	0.0	3.9	3.1	3.6	0.0	4.7	5.0

us-gaap:Service

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	41	39	46	36	35	35	34	30	29	25	30	26	27	26	20	19	19
Percentage of CostOfGoodsAndServicesSold	64.0	63.7	68.6	67.9	66.1	71.1	69.8	74.7	72.9	73.4	75.2	73.0	67.4	67.5	50.7	54.4	54.7
Percentage of Revenues	9.2	10.9	7.5	9.9	9.2	11.7	7.1	9.0	8.0	8.1	7.3	9.2	8.9	9.3	6.8	7.1	7.5
Percentage of Revenues us-gaap:Service	17.7	17.1	0.0	16.1	16.5	16.4	0.0	14.9	14.9	13.2	0.0	14.7	15.6	15.2	0.0	16.5	17.4

Gross Profit

us-gaap:GrossProfit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	382	301	555	313	331	254	436	302	328	282	375	253	265	243	261	239	227	216	231	210	209	190	214	201	197	181	214	196	193	177	197	177	178	161	184	163	160	151	164	141	134	131	139	114	113	111
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	100.0	100.0	100.0	100.0
Percentage of Revenues	85.6	82.9	89.1	85.5	86.0	83.6	89.8	88.0	89.0	89.0	90.4	87.5	86.8	86.2	86.5	86.9	86.2	85.4	85.6	85.5	85.0	84.4	85.3	84.6	84.0	83.5	84.4	84.1	83.4	82.5	83.6	83.5	82.9	81.7	83.4	82.9	82.2	81.5	83.2	82.1	82.7	83.2	83.9	81.9	82.5	81.9

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	128	47	257	90	112	33	185	108	129	98	185	95	109	97	102	107	99	85	98	100	95	85	97	90	87	81	93	90	83	79	92	81	78	69	81	73	71	67	73	65	64	61	65	50	51	47
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	100.0	100.0	100.0	100.0
Percentage of Revenues	28.9	13.1	41.3	24.6	29.2	10.9	38.1	31.6	35.2	31.1	44.5	32.9	35.9	34.3	33.8	39.2	37.8	33.8	36.2	41.1	38.8	38.0	38.9	38.0	37.1	37.3	36.9	38.9	36.1	36.9	39.2	38.4	36.6	35.2	36.9	37.3	36.5	36.3	36.9	37.8	39.8	39.0	39.5	36.4	37.5	35.2

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	35	-24.775	42	14	16	-12.74	19	19	20	12	31	5.927	17	12	49	34	30	22	28	31	25	29	29	24	24	25	24	25	20	22	16	19	22	18	25	21	20	21	25	19	19	19	16	14	16	15
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	100.0	100.0	100.0	100.0
Percentage of Revenues	7.9	-6.8	6.8	4.0	4.2	-4.2	4.0	5.6	5.5	3.9	7.7	2.0	5.6	4.5	16.5	12.4	11.4	8.8	10.4	12.8	10.5	13.0	11.8	10.2	10.6	11.6	9.5	10.9	9.0	10.6	7.0	9.1	10.6	9.4	11.5	11.1	10.8	11.7	12.9	11.5	11.8	12.3	10.0	10.6	11.8	11.4

Income Taxes Paid

us-gaap:IncomeTaxesPaid

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	18	20	18	22	6.726	6.757	13	17	50	4.832	13	27	43	3.402	31	28	53	2.376	23	29	59	6.037	29	22	51	3.273	27	27	53	10	25	31	35	4.911	24	26	39	13	14	19	22	8.769	85	10	26	8.945
Percentage of IncomeTaxesPaid	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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 Revenues	4.2	5.7	3.0	6.0	1.7	2.2	2.7	5.2	13.8	1.5	3.2	9.5	14.1	1.2	10.5	10.5	20.3	0.9	8.6	11.9	24.3	2.7	11.7	9.6	22.0	1.5	10.8	11.7	23.0	4.6	10.8	14.8	16.7	2.5	11.0	13.7	20.0	7.0	7.2	11.2	13.8	5.5	51.6	7.4	19.4	6.6

Interest Expense

us-gaap:InterestExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	3.336	3.315	2.444	1.853	3.04	3.651	2.9	0.239	0.231	0.091	0.046	0.03	0.059	0.086	-0.046	0.095	0.122	0.154	0.201	0.149	0.181	0.248	0.202	0.226	0.37	0.371	0.488	0.632	0.723	0.818	1.002	0.753	0.774	0.803	0.792	0.902	1.245	1.549
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
Percentage of Revenues	0.7	0.9	0.4	0.5	0.8	1.2	0.6	0.1	0.1	0.0	0.0	0.0	0.0	0.0	-0.0	0.0	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.2	0.3	0.4	0.4	0.5	0.4	0.5	0.5	0.5	0.6	0.9	1.1

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	93	72	215	75	96	46	165	89	109	86	153	89	92	84	52	73	69	63	69	69	69	56	68	66	62	56	69	65	63	56	75	62	55	51	56	51	50	45	47	45	45	42	49	36	35	32
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	100.0	100.0	100.0	100.0
Percentage of Revenues	21.0	19.9	34.6	20.6	25.0	15.1	34.1	26.0	29.8	27.2	36.9	30.9	30.3	29.8	17.4	26.7	26.4	25.0	25.9	28.3	28.3	25.0	27.0	27.8	26.5	25.8	27.4	28.0	27.1	26.3	32.2	29.4	26.0	25.8	25.4	26.2	25.8	24.6	23.9	26.3	28.0	26.7	29.5	25.8	25.8	23.8

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	93	72	75	96	46	89	109	86	89	92	84
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 Revenues	21.0	19.9	20.6	25.0	15.1	26.0	29.8	27.2	30.9	30.3	29.8
Percentage of Revenues 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

Operating Expenses

us-gaap:OperatingExpenses

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	265	251	296	223	218	220	250	197	199	186	195	160	156	148	160	133	129	130	134	110	114	105	117	111	111	101	120	105	110	98	105	95	99	91	102	89	89	83	91	76	69	69	74	62	61	61
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	100.0	100.0	100.0	100.0
Percentage of Revenues	59.5	69.1	47.5	60.9	56.8	72.4	51.6	57.4	54.1	58.9	47.0	55.3	51.3	52.6	53.2	48.4	49.0	51.7	49.8	44.8	46.7	46.7	46.8	46.7	47.2	46.8	47.4	45.3	47.4	45.7	44.6	45.1	46.4	46.5	46.4	45.5	45.7	44.9	46.3	44.3	42.8	43.8	44.7	44.8	44.5	45.4

Operating Income Loss

us-gaap:OperatingIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	116	50	259	90	112	34	185	105	128	95	179	93	108	95	100	106	98	85	96	100	94	85	96	90	86	80	94	90	83	79	92	81	78	69	81	73	71	67	73	65	64	62	65	51	52	49
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	100.0	100.0	100.0	100.0
Percentage of Revenues	26.1	13.8	41.6	24.5	29.3	11.2	38.2	30.5	34.9	30.2	43.3	32.1	35.5	33.6	33.3	38.5	37.3	33.7	35.8	40.7	38.3	37.6	38.5	37.9	36.7	36.8	37.0	38.8	35.9	36.7	39.1	38.4	36.5	35.2	37.0	37.4	36.5	36.6	36.9	37.8	39.9	39.4	39.3	37.1	38.0	36.5

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	14	0.399	0.315	1.158	1.884	0.127	-0.294	0.594	-1.667	-0.425	1.381	-0.974	-1.007	-0.308	-0.484	-0.168	-0.19	-1.154	0.047	-0.159	0.305	-0.108	0.107	-0.383	0.091	0.767	-0.762	-0.395	-0.179	-0.198	-0.195	-0.357	-0.173	-0.321	-0.395	-0.355	-0.039	-0.616	0.175	0.078	-0.108	-0.514	0.645	-0.574	0.139	-0.507
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	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 Revenues	3.3	0.1	0.1	0.3	0.5	0.0	-0.1	0.2	-0.5	-0.1	0.3	-0.3	-0.3	-0.1	-0.2	-0.1	-0.1	-0.5	0.0	-0.1	0.1	-0.0	0.0	-0.2	0.0	0.4	-0.3	-0.2	-0.1	-0.1	-0.1	-0.2	-0.1	-0.2	-0.2	-0.2	-0.0	-0.3	0.1	0.0	-0.1	-0.3	0.4	-0.4	0.1	-0.4

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	100	100	96	86	86	86	79	73	75	70	58	59	58	57	49	50	49	54	45	45	47	44	41	44	42	40	42	41	42	40	37	38	38	36	34	33	33	31	29	28	25	24	23	21	21	22
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	100.0	100.0	100.0	100.0
Percentage of Revenues	22.6	27.7	15.5	23.6	22.3	28.2	16.3	21.2	20.4	22.3	14.2	20.4	19.1	20.3	16.3	18.2	18.6	21.5	16.8	18.5	19.3	19.8	16.4	18.8	18.1	18.4	16.6	17.5	18.1	18.6	16.0	18.3	18.0	18.2	15.5	17.0	17.1	17.0	15.0	16.7	15.5	15.6	14.0	15.5	15.5	16.6

Revenues

us-gaap:Revenues

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	446	363	623	366	385	304	486	343	368	317	415	289	305	282	302	275	263	253	270	245	246	225	251	237	235	217	254	234	232	215	236	212	214	197	220	196	195	185	198	172	162	158	166	139	137	136
Percentage of Revenues	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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 Revenues	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:Revenues us-gaap:ProductOrService

anss:LeaseLicenseRevenue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	129	65	263	78	113	44	166	70	100	69	126	43	56	48	97	93	92
Percentage of Revenues	29.1	17.9	42.2	21.5	29.4	14.7	34.2	20.6	27.1	21.8	30.5	14.9	18.6	17.2	32.1	34.1	35.0
Percentage of Revenues	29.1	17.9	42.2	21.5	29.4	14.7	34.2	20.6	27.1	21.8	30.5	14.9	18.6	17.2	32.1	34.1	35.0
Percentage of Revenues anss:LeaseLicenseRevenue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:PerpetualLicenseRevenue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	85	67	118	62	56	42	102	66	70	53	99	65	74	61	79	62	57
Percentage of Revenues	19.0	18.6	19.1	17.1	14.6	14.1	21.2	19.3	19.1	17.0	24.0	22.8	24.3	21.7	26.3	22.7	21.8
Percentage of Revenues	19.0	18.6	19.1	17.1	14.6	14.1	21.2	19.3	19.1	17.0	24.0	22.8	24.3	21.7	26.3	22.7	21.8
Percentage of Revenues anss:PerpetualLicenseRevenue	100.0	100.0	100.0	100.0	100.0	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	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	214	132	382	141	169	87	268	137	170	123	226	109	131	110	176	156	149
Percentage of Revenues	48.1	36.5	61.3	38.6	43.9	28.8	55.3	39.9	46.3	38.8	54.5	37.7	42.9	38.9	58.4	56.8	56.8
Percentage of Revenues	48.1	36.5	61.3	38.6	43.9	28.8	55.3	39.9	46.3	38.8	54.5	37.7	42.9	38.9	58.4	56.8	56.8
Percentage of Revenues 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	100.0	100.0

us-gaap:Maintenance

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	218	213	224	211	203	200	200	193	185	181	175	171	165	163	116	112	107
Percentage of Revenues	48.9	58.8	36.1	57.8	52.7	65.7	41.3	56.2	50.2	57.2	42.3	59.2	54.1	57.9	38.4	40.7	40.8
Percentage of Revenues	48.9	58.8	36.1	57.8	52.7	65.7	41.3	56.2	50.2	57.2	42.3	59.2	54.1	57.9	38.4	40.7	40.8
Percentage of Revenues 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	100.0	100.0

us-gaap:Service

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	231	230	241	225	216	217	217	206	198	194	189	180	174	172	125	119	114
Percentage of Revenues	51.9	63.5	38.7	61.4	56.1	71.2	44.7	60.1	53.7	61.2	45.5	62.3	57.1	61.1	41.6	43.2	43.2
Percentage of Revenues	51.9	63.5	38.7	61.4	56.1	71.2	44.7	60.1	53.7	61.2	45.5	62.3	57.1	61.1	41.6	43.2	43.2
Percentage of Revenues us-gaap:Service	100.0	100.0	100.0	100.0	100.0	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:TechnologyService

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	13	16	16	13	13	16	16	13	13	12	13	8.852	9.163	8.931	9.65	6.705	6.412
Percentage of Revenues	3.0	4.7	2.7	3.7	3.4	5.5	3.4	3.9	3.5	4.0	3.2	3.1	3.0	3.2	3.2	2.4	2.4
Percentage of Revenues	3.0	4.7	2.7	3.7	3.4	5.5	3.4	3.9	3.5	4.0	3.2	3.1	3.0	3.2	3.2	2.4	2.4
Percentage of Revenues us-gaap:TechnologyService	100.0	100.0	100.0	100.0	100.0	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:Revenues us-gaap:StatementGeographical

anss:OtherInternational

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	50	42	99	24	40	37	34	26	49	37	30	31	37	33	89	23	22	34	44	35	33	28	35	32	30	26	50	46	43	34	43	38	37	31	42	36	33	26	33	28	27	22	25	22	21
Percentage of Revenues	11.2	11.8	15.9	6.7	10.6	12.3	7.0	7.8	13.5	11.8	7.4	11.0	12.2	11.8	29.7	8.7	8.6	13.6	16.6	14.3	13.5	12.5	14.2	13.5	13.1	12.3	20.0	19.8	18.8	15.9	18.6	18.1	17.5	15.9	19.1	18.4	17.2	14.4	16.9	16.2	17.2	14.5	15.5	16.3	15.7
Percentage of Revenues	11.2	11.8	15.9	6.7	10.6	12.3	7.0	7.8	13.5	11.8	7.4	11.0	12.2	11.8	29.7	8.7	8.6	13.6	16.6	14.3	13.5	12.5	14.2	13.5	13.1	12.3	20.0	19.8	18.8	15.9	18.6	18.1	17.5	15.9	19.1	18.4	17.2	14.4	16.9	16.2	17.2	14.5	15.5	16.3	15.7
Percentage of Revenues anss:OtherInternational	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

country:CN

Period End	2020-09-30	2019-12-31	2019-09-30	2018-12-31	2018-09-30	2017-12-31	2017-09-30	2017-06-30	2016-12-31	2016-09-30	2016-06-30
Value	17	20	18	18	14	11	16	14	13	11	10
Percentage of Revenues	4.7	4.3	5.3	4.6	5.0	3.8	6.0	5.5	4.9	4.6	4.4
Percentage of Revenues	4.7	4.3	5.3	4.6	5.0	3.8	6.0	5.5	4.9	4.6	4.4
Percentage of Revenues country:CN	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

country:DE

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	30	31	75	27	27	30	64	37	25	30	43	27	23	45	37	25	23	22	26	25	24	23	25	23	22	23	26	23	24	25	24	23	22	22	21	20	19	20	19	18	17	16	15	14	14
Percentage of Revenues	6.9	8.6	12.1	7.5	7.1	9.9	13.4	10.9	7.0	9.6	10.4	9.6	7.8	16.1	12.3	9.2	8.7	9.0	9.7	10.3	10.0	10.3	10.1	9.9	9.5	10.7	10.4	10.2	10.5	11.7	10.4	11.2	10.4	11.4	9.7	10.3	10.2	11.1	10.0	10.7	10.5	10.7	9.6	10.6	10.4
Percentage of Revenues	6.9	8.6	12.1	7.5	7.1	9.9	13.4	10.9	7.0	9.6	10.4	9.6	7.8	16.1	12.3	9.2	8.7	9.0	9.7	10.3	10.0	10.3	10.1	9.9	9.5	10.7	10.4	10.2	10.5	11.7	10.4	11.2	10.4	11.4	9.7	10.3	10.2	11.1	10.0	10.7	10.5	10.7	9.6	10.6	10.4
Percentage of Revenues country:DE	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

country:FR

Period End	2021-03-31	2020-12-31	2020-09-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31
Value	15	27	14	15	21	17	13	15	23	14	14	16	11	15	13	13	13	12	12	11	13	11	12	11	15	13	15	14
Percentage of Revenues	4.2	4.3	4.1	5.1	4.5	5.0	3.8	4.9	5.5	4.8	4.6	5.9	3.7	5.5	5.3	5.3	4.9	4.9	5.0	5.2	5.4	4.9	5.4	5.3	6.0	5.9	6.7	6.6
Percentage of Revenues	4.2	4.3	4.1	5.1	4.5	5.0	3.8	4.9	5.5	4.8	4.6	5.9	3.7	5.5	5.3	5.3	4.9	4.9	5.0	5.2	5.4	4.9	5.4	5.3	6.0	5.9	6.7	6.6
Percentage of Revenues country:FR	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

country:GB

Period End	2020-09-30	2019-09-30
Value	26	9.619
Percentage of Revenues	7.2	2.8
Percentage of Revenues	7.2	2.8
Percentage of Revenues country:GB	100.0	100.0

country:JP

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	60	42	49	40	55	37	45	35	47	33	36	36	42	30	31	30	32	31	29	31	31	27	26	24	25	26	26	25	27	28	26	25	27	28	31	31	29	29	29	29	25	26	27	23	21
Percentage of Revenues	13.5	11.6	7.9	11.1	14.5	12.2	9.4	10.4	12.8	10.6	8.9	12.5	13.8	10.8	10.5	11.2	12.3	12.4	10.9	12.8	12.7	12.3	10.6	10.5	11.0	12.3	10.3	11.0	12.0	13.4	11.2	12.1	12.6	14.5	14.3	16.1	15.2	15.9	15.1	17.2	15.7	17.0	16.3	16.5	15.7
Percentage of Revenues	13.5	11.6	7.9	11.1	14.5	12.2	9.4	10.4	12.8	10.6	8.9	12.5	13.8	10.8	10.5	11.2	12.3	12.4	10.9	12.8	12.7	12.3	10.6	10.5	11.0	12.3	10.3	11.0	12.0	13.4	11.2	12.1	12.6	14.5	14.3	16.1	15.2	15.9	15.1	17.2	15.7	17.0	16.3	16.5	15.7
Percentage of Revenues country:JP	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

country:KR

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31
Value	23	22	20	21	17	15	17	16	40	15	27	12	17	15	17	15	16	13	15	13	16	11	15	12	16	11	15	14	14	10
Percentage of Revenues	5.2	6.2	3.3	5.7	4.5	5.1	3.5	4.9	11.1	4.8	6.6	4.5	5.7	5.3	5.7	5.6	6.3	5.4	5.6	5.4	6.6	5.3	6.1	5.4	6.8	5.1	6.3	6.1	6.3	5.1
Percentage of Revenues	5.2	6.2	3.3	5.7	4.5	5.1	3.5	4.9	11.1	4.8	6.6	4.5	5.7	5.3	5.7	5.6	6.3	5.4	5.6	5.4	6.6	5.3	6.1	5.4	6.8	5.1	6.3	6.1	6.3	5.1
Percentage of Revenues country:KR	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

country:US

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	208	152	310	156	184	125	212	146	137	140	178	106	122	98	107	107	101	100	101	91	89	85	92	93	87	81	86	81	78	73	77	72	74	67	70	65	66	63	64	53	48	49	54	44	45
Percentage of Revenues	46.7	42.0	49.8	42.7	47.7	41.0	43.7	42.7	37.4	44.4	43.0	36.7	40.1	34.9	35.7	38.9	38.5	39.8	37.7	37.1	36.3	37.8	36.6	39.3	37.1	37.4	34.1	35.0	33.7	34.1	33.0	34.2	34.7	33.9	31.7	33.2	34.1	34.3	32.7	31.0	29.8	31.1	32.6	31.9	33.1
Percentage of Revenues	46.7	42.0	49.8	42.7	47.7	41.0	43.7	42.7	37.4	44.4	43.0	36.7	40.1	34.9	35.7	38.9	38.5	39.8	37.7	37.1	36.3	37.8	36.6	39.3	37.1	37.4	34.1	35.0	33.7	34.1	33.0	34.2	34.7	33.9	31.7	33.2	34.1	34.3	32.7	31.0	29.8	31.1	32.6	31.9	33.1
Percentage of Revenues country:US	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-03-31	2017-03-31
Value	74	56	129	37	60	43	68	44	67	44	56	45	43	36
Percentage of Revenues	16.6	15.6	20.7	10.2	15.6	14.4	14.2	13.0	18.2	14.0	13.6	15.8	15.2	14.4
Percentage of Revenues	16.6	15.6	20.7	10.2	15.6	14.4	14.2	13.0	18.2	14.0	13.6	15.8	15.2	14.4
Percentage of Revenues 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

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	160	146	195	132	128	130	167	120	120	112	133	97	95	87	108	80	77	73	85	61	64	57	71	61	63	56	72	58	62	53	62	51	55	50	61	49	48	45	56	43	40	40	46	36	35	35
Percentage of SellingGeneralAndAdministrativeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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 Revenues	35.9	40.3	31.4	36.1	33.4	42.8	34.5	35.1	32.7	35.4	32.0	33.7	31.1	31.0	35.8	29.0	29.2	29.0	31.8	25.0	26.1	25.6	28.6	25.8	27.0	26.1	28.5	24.9	26.8	24.9	26.4	24.1	25.7	25.3	28.0	25.0	25.1	24.4	28.5	25.0	24.7	25.6	28.2	26.4	26.1	25.9

Assets

us-gaap:Assets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	5890	5818	5940	4846	4671	4526	4838	3582	3512	3372	3265	3056	3058	2959	2941	2846	2760	2794	2800	2730	2747	2758	2729	2701	2746	2681	2774	2789	2799	2793	2722	2618	2576	2599	2607	2558	2513	2517	2448	2347	2237	2178	2126	1920
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	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	100.0	100.0	100.0	100.0	100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	5890	5818	5940	4846	4671	4526	4838	3582	3512	3372	3265	3056	3058	2959	2941	2846	2760	2794	2800	2730	2747	2758	2729	2701	2746	2681	2774	2789	2799	2793	2722	2618	2576	2599	2607	2558	2513	2517	2448	2347	2237	2178	2126	1920
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	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	100.0	100.0	100.0	100.0	100.0

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	4250	4111	4097	3589	3438	3292	3453	2923	2817	2684	2649	2548	2507	2407	2245	2287	2189	2211	2208	2229	2235	2233	2194	2211	2241	2151	2217	2255	2219	2208	2136	2088	1997	2005	1940	1896	1820	1820	1754	1693	1640	1576	1529	1312	1182	641
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	72.2	70.7	69.0	74.1	73.6	72.7	71.4	81.6	80.2	79.6	81.1	83.4	82.0	81.4	76.3	80.4	79.3	79.1	78.9	81.7	81.4	81.0	80.4	81.9	81.6	80.2	79.9	80.9	79.3	79.1	78.5	79.8	77.6	77.2	74.4	74.1	72.5	72.3	71.7	72.1	73.3	72.4	71.9	68.4	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	-32.822	-37.039	-17.775	-51.337	-79.385	-89.673	-65.381	-90.141	-69.379	-69.937	-62.379	-60.891	-55.789	-29.601	-37.844	-57.652	-52.164	-31.754	-2.644	8.651	11	16	8.812	-1.484	16
Percentage of StockholdersEquity	-0.8	-0.9	-0.4	-1.4	-2.3	-2.7	-1.9	-3.1	-2.5	-2.6	-2.4	-2.4	-2.2	-1.2	-1.7	-2.6	-2.4	-1.4	-0.1	0.4	0.7	1.1	0.7	-0.1	2.5
Percentage of Assets	-0.6	-0.6	-0.3	-1.1	-1.7	-2.0	-1.4	-2.5	-2.0	-2.1	-1.9	-2.0	-1.8	-1.0	-1.3	-2.1	-1.9	-1.1	-0.1	0.3	0.5	0.8	0.5	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	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	1381	1346	1434	1182	1144	1118	1188	865	839	824	867	850	837	833	873	883	894	904	926	927	905	856	801	806	355
Percentage of StockholdersEquity	32.5	32.7	35.0	32.9	33.3	34.0	34.4	29.6	29.8	30.7	32.7	33.4	33.4	34.6	38.9	40.0	40.8	40.8	43.3	47.8	51.6	56.0	61.1	68.2	55.4
Percentage of Assets	23.5	23.1	24.1	24.4	24.5	24.7	24.6	24.2	23.9	24.5	26.6	27.8	27.4	28.2	29.7	31.5	32.8	32.6	34.0	35.6	37.0	40.3	41.7	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	0.0	0.0	0.0	0.0

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	0.953	0.953	0.953	0.946	0.946	0.946	0.946	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.927	0.916	0.897	0.897	0.783
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	0.0	0.0	0.0	0.0	0.1	0.1	0.1	0.1	0.1
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
Percentage of Assets 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	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	3970	3876	3804	3588	3513	3416	3370	3204	3115	3005	2919	2766	2676	2584	2316	2057	1792	1539	1284	1039	836	655	502	385	274
Percentage of StockholdersEquity	93.4	94.3	92.8	100.0	102.2	103.8	97.6	109.6	110.6	112.0	110.2	108.5	106.8	107.4	103.2	93.2	81.7	69.4	60.1	53.6	47.7	42.8	38.3	32.6	42.8
Percentage of Assets	67.4	66.6	64.0	74.1	75.2	75.5	69.7	89.5	88.7	89.1	89.4	90.5	87.5	87.3	78.8	73.5	65.6	55.5	47.2	39.9	34.1	30.8	26.2	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	0.0	0.0	0.0	0.0

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	-1070.21	-1075.537	-1124.102	-1131.084	-1141.04	-1153.863	-1041.831	-1057.955	-1069.354	-1077.252	-1075.879	-1008.37	-951.912	-981.713	-907.53	-675.55	-440.839	-196.01	-72.891	-36.151	0.0	0.0	-0.853	-9.079	-5.182
Percentage of StockholdersEquity	-25.2	-26.2	-27.4	-31.5	-33.2	-35.0	-30.2	-36.2	-38.0	-40.1	-40.6	-39.6	-38.0	-40.8	-40.4	-30.6	-20.1	-8.8	-3.4	-1.9	0.0	0.0	-0.1	-0.8	-0.8
Percentage of Assets	-18.2	-18.5	-18.9	-23.3	-24.4	-25.5	-21.5	-29.5	-30.4	-31.9	-32.9	-33.0	-31.1	-33.2	-30.9	-24.1	-16.1	-7.1	-2.7	-1.4	0.0	0.0	-0.0	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	0.0	0.0	0.0	0.0

Assets Current

us-gaap:AssetsCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	1622	1660	1719	1458	1294	1290	1555	1206	1133	1062	1311	1127	1142	1327	1270	1201	1145	1182	1169	1100	1109	1118	1076	1045	1110	1029	1110	1075	1064	1132	1067	959	915	931	913	825	841	830	740	626	854	784	714	515
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	27.5	28.5	28.9	30.1	27.7	28.5	32.1	33.7	32.3	31.5	40.1	36.9	37.4	44.9	43.2	42.2	41.5	42.3	41.8	40.3	40.4	40.5	39.4	38.7	40.4	38.4	40.0	38.5	38.0	40.5	39.2	36.7	35.5	35.8	35.0	32.3	33.5	33.0	30.2	26.7	38.2	36.0	33.6	26.8

Cash

us-gaap:Cash

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	556	548	571	536	518	599	549	431	381	379	331	332	305	560	568	528	487	511	488	503	488	521	427	423	431	421	506	447	442	472	439	400	391	396	369	284	288	279	289	242	243	170
Percentage of Cash	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	9.4	9.6	11.1	11.1	13.2	11.4	12.0	10.9	11.3	10.1	10.9	10.0	18.9	19.3	18.6	17.7	18.3	17.4	18.4	17.8	18.9	15.7	15.7	15.7	15.7	18.3	16.1	15.8	16.9	16.1	15.3	15.2	15.3	14.2	11.1	11.5	11.1	11.8	10.3	10.9	8.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31	2009-12-31	2008-12-31	2007-12-31
Value	957	987	912	844	744	717	872	732	631	607	777	729	695	885	881	919	857	866	822	837	843	863	784	776	840	760	788	816	782	857	742	707	659	650	576	554	551	557	471	406	629	549	472	494	415	389	335	228	167
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	16.3	17.0	15.4	17.4	15.9	15.9	18.0	20.5	18.0	18.0	23.8	23.9	22.8	29.9	30.0	32.3	31.1	31.0	29.4	30.7	30.7	31.3	28.7	28.7	30.6	28.4	28.4	29.3	28.0	30.7	27.3	27.0	25.6	25.0	22.1	21.7	21.9	22.2	19.3	17.3	28.1	25.2	22.2	0.0	0.0	0.0	17.5	0.0	0.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:CashAndCashEquivalents, us-gaap:ConcentrationRiskByType

country:US, us-gaap:CreditConcentrationRisk

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31
Value	582	626	616	561	593	539	556	530
Percentage of CashAndCashEquivalentsAtCarryingValue	63.9	71.8	79.3	63.7	72.1	68.7	70.6	71.5
Percentage of Assets	9.8	12.9	18.9	19.1	21.2	19.7	20.1	19.5
Percentage of Assets country:US us-gaap:CreditConcentrationRisk	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:GeographicDistributionForeign, us-gaap:CreditConcentrationRisk

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	329	245	160	320	229	245	231
Percentage of CashAndCashEquivalentsAtCarryingValue	36.1	28.2	20.7	36.3	27.9	31.3	29.4
Percentage of Assets	5.6	5.1	4.9	10.9	8.2	9.0	8.4
Percentage of Assets us-gaap:GeographicDistributionForeign us-gaap:CreditConcentrationRisk	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2017-12-31	2016-12-31
Value	957	987	912	844	744	717	872	732	631	607	777	729	695	881	822
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100.0	100.0	100.0	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	16.3	17.0	15.4	17.4	15.9	15.9	18.0	20.5	18.0	18.0	23.8	23.9	22.8	30.0	29.4

Short Term Investments

us-gaap:ShortTermInvestments

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	504000.0	516000.0	479000.0	468000.0	433000.0	282000.0	288000.0	218000.0	241000.0	237000.0	225000.0	211000.0	269000.0	4275000.0	286000.0	7064000.0	5486000.0	368000.0	381000.0	356000.0	410000.0	442000.0	446000.0	684000.0	816000.0	789000.0	714000.0	665000.0	644000.0	559000.0	500000.0	440000.0	461000.0	488000.0	452000.0	454000.0	468000.0	599000.0	576000.0	582000.0	548000.0	535000.0	455000.0	7966000.0
Percentage of ShortTermInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	0.1	0.0	0.2	0.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.4

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	449	394	537	371	343	337	433	295	297	268	317	235	258	256	124	91	83	92	107	85	85	82	91	91	87	80	101	83	88	83	97	79	84	80	96	77	83	79	84	65	68	71	76	67
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	7.6	6.8	9.0	7.7	7.3	7.4	9.0	8.3	8.5	8.0	9.7	7.7	8.4	8.7	4.2	3.2	3.0	3.3	3.8	3.1	3.1	3.0	3.4	3.4	3.2	3.0	3.6	3.0	3.2	3.0	3.6	3.1	3.3	3.1	3.7	3.0	3.3	3.2	3.5	2.8	3.1	3.3	3.6	3.5

Other Assets Current

us-gaap:OtherAssetsCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	214	278	268	242	206	235	249	177	203	186	216	162	188	181	263	183	198	223	239	176	180	172	200	148	158	167	192	148	168	169	200	148	151	183	216	171	187	175	163	134	134	146	147	86
Percentage of OtherAssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	3.6	4.8	4.5	5.0	4.4	5.2	5.2	5.0	5.8	5.5	6.6	5.3	6.2	6.1	9.0	6.5	7.2	8.0	8.5	6.5	6.6	6.2	7.3	5.5	5.8	6.3	6.9	5.3	6.0	6.1	7.4	5.7	5.9	7.1	8.3	6.7	7.5	7.0	6.7	5.7	6.0	6.7	6.9	4.5

Assets Noncurrent

us-gaap:AssetsNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	4268	4157	4221	3387	3377	3235	3283	2375	2379	2309	1954
Percentage of AssetsNoncurrent	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	72.5	71.5	71.1	69.9	72.3	71.5	67.9	66.3	67.7	68.5	59.9

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	238	212	183	173	156	160	151	136	115	106	90
Percentage of PropertyPlantAndEquipmentGross	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	4.0	4.4	5.6	5.9	5.6	5.9	5.4	5.0	4.4	4.4	4.2

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	38	38	27	26	25
Percentage of PropertyPlantAndEquipmentGross	16.1	17.9	14.9	15.2	16.2
Percentage of Assets	0.6	0.8	0.8	0.9	0.9
Percentage of Assets us-gaap:BuildingAndBuildingImprovements	0.0	0.0	0.0	0.0	0.0

us-gaap:Equipment

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	123	105	92	88	78	78	75	68	59	55	41
Percentage of PropertyPlantAndEquipmentGross	51.6	49.6	50.4	50.7	50.1	49.1	50.0	50.6	51.6	51.8	46.5
Percentage of Assets	2.1	2.2	2.8	3.0	2.8	2.9	2.7	2.5	2.3	2.3	2.0
Percentage of Assets us-gaap:Equipment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:FurnitureAndFixtures

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	14	12	10	9.239	8.618	8.601	8.475	4.973	4.457	5.007	4.577
Percentage of PropertyPlantAndEquipmentGross	6.2	6.0	5.9	5.3	5.5	5.4	5.6	3.7	3.9	4.7	5.1
Percentage of Assets	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.2	0.2	0.2	0.2
Percentage of Assets us-gaap:FurnitureAndFixtures	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Land

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	2.696	2.696	1.759	1.759	1.759	1.759	2.14	2.178	2.178	1.749	1.368
Percentage of PropertyPlantAndEquipmentGross	1.1	1.3	1.0	1.0	1.1	1.1	1.4	1.6	1.9	1.6	1.5
Percentage of Assets	0.0	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Percentage of Assets us-gaap:Land	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:LeaseholdImprovements

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	25	19	15	13	11	12	10	8.125	7.334	7.394	6.566
Percentage of PropertyPlantAndEquipmentGross	10.6	9.3	8.6	7.7	7.4	7.9	6.9	6.0	6.3	6.9	7.3
Percentage of Assets	0.4	0.4	0.5	0.5	0.4	0.5	0.4	0.3	0.3	0.3	0.3
Percentage of Assets us-gaap:LeaseholdImprovements	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31
Value	34	33	35	34	30	33	30	27
Percentage of PropertyPlantAndEquipmentGross	14.4	15.9	19.1	20.1	19.7	21.0	19.9	20.3
Percentage of Assets	0.6	0.7	1.1	1.2	1.1	1.2	1.1	1.0
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	142	129	121	116	102	98	86	75	63	60	53
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
Percentage of Assets	2.4	2.7	3.7	4.0	3.7	3.6	3.1	2.8	2.4	2.5	2.5

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	4.434	4.407	4.037	4.237	4.163	4.162	3.827	3.787	3.796	3.759	3.374	3.491	3.495	3.435	3.466	3.26	3.139	3.107	3.174	3.222	3.201	3.158	4.357	4.925	5.035	5.077	6.014	6.793	5.787	4.794	4.992	5.625	5.813	5.929	6.468	6.8	6.75	6.425	5.402	4.5	4.07	4.017	4.129	4.037	3.875	3.962
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	100.0	100.0	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	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	91	93	96	90	88	82	83	70	68	63	61	57	56	55	57	57	53	54	54	55	58	60	61	58	60	62	64	65	62	59	60	54	50	50	52	51	51	46	45	40	38	37	36	35
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.6	1.6	1.6	1.9	1.9	1.8	1.7	2.0	1.9	1.9	1.9	1.9	1.8	1.9	1.9	2.0	2.0	2.0	2.0	2.0	2.1	2.2	2.3	2.2	2.2	2.3	2.3	2.3	2.2	2.1	2.2	2.1	2.0	2.0	2.0	2.0	2.1	1.9	1.9	1.7	1.7	1.7	1.7	1.8

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

anss:OtherInternational

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	6.317	6.772	6.589	5.76	5.181	4.183	4.54	4.378	3.628	3.717	3.754	3.751	3.331	2.678	2.835	2.761	2.696	2.78	3.081	3.463	3.776	3.685	3.859	4.245	4.188	3.813	3.723	4.101	1.561	1.02	1.1	1.08	0.911	0.969	0.974	0.991	0.873	0.979	0.968	0.623	0.428
Percentage of PropertyPlantAndEquipmentNet	6.9	7.3	6.8	6.4	5.8	5.1	5.4	6.2	5.3	5.9	6.1	6.5	5.9	4.8	5.0	4.8	5.0	5.1	5.6	6.2	6.5	6.1	6.2	7.2	6.9	6.1	5.8	6.3	2.5	1.7	1.8	2.0	1.8	1.9	1.9	1.9	1.9	2.1	2.4	1.6	1.2
Percentage of Assets	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	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.1	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets anss:OtherInternational	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

country:DE

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	5.369	5.541	5.277	4.802	4.879	4.025	4.237	2.158	2.92	2.701	2.328	2.109	2.107	2.087	2.034	2.087	2.386	1.843	1.777	1.893	1.709
Percentage of PropertyPlantAndEquipmentNet	5.8	5.9	5.5	5.3	5.5	4.9	5.1	3.5	4.7	4.5	3.8	3.8	4.1	4.0	4.0	4.0	5.1	4.0	4.4	4.9	4.6
Percentage of Assets	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	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Percentage of Assets country:DE	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

country:FR

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-06-30	2018-12-31	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2010-12-31
Value	5.003	5.239	5.749	5.647	5.593	5.469	3.657	3.616	2.887	2.286	2.268	2.275	2.182	2.189	2.378	2.266	2.136	2.237	2.388	1.139
Percentage of PropertyPlantAndEquipmentNet	5.4	5.6	6.0	6.3	6.3	6.6	4.4	5.3	4.7	3.7	3.8	3.8	4.0	4.3	4.6	4.4	4.1	4.8	5.2	3.1
Percentage of Assets	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	0.1	0.1	0.1	0.1	0.1	0.1
Percentage of Assets country:FR	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

country:GB

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	3.765	3.589	3.6	3.842	4.194	3.696	3.664	1.238	2.657	2.746	3.016	3.011	3.214	3.532	2.884	2.928	3.153	3.077	2.68	2.766	2.316
Percentage of PropertyPlantAndEquipmentNet	3.9	4.0	4.1	4.7	5.0	5.3	5.4	2.0	4.3	4.6	5.0	5.5	6.3	6.8	5.6	5.7	6.7	6.7	6.7	7.2	6.3
Percentage of Assets	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.0	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
Percentage of Assets country:GB	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

country:IN

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	6.437	7.077	7.408	6.67	5.479	4.998	5.66	5.641	5.016	4.217	4.176	3.708	3.32	3.497	3.704	3.685	3.991	3.112	3.033	3.253	3.376	2.977	3.286	2.963	2.937	2.962	3.123	3.259	3.337	3.22	3.226	2.892	3.352	3.392	3.203	2.887	3.051	3.092	3.073	2.813	2.846
Percentage of PropertyPlantAndEquipmentNet	7.0	7.6	7.7	7.4	6.2	6.1	6.8	8.0	7.3	6.7	6.8	6.4	5.9	6.3	6.5	6.4	7.4	5.7	5.5	5.8	5.8	4.9	5.3	5.1	4.8	4.7	4.8	5.0	5.3	5.4	5.3	5.3	6.6	6.5	6.3	5.6	6.5	6.8	7.6	7.3	7.7
Percentage of Assets	0.1	0.1	0.1	0.1	0.1	0.1	0.1	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	0.1	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	0.1	0.1	0.1	0.1	0.1
Percentage of Assets country:IN	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

country:US

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	63	62	65	61	62	57	59	48	47	47	46	44	43	44	45	45	42	43	43	43	45	47	47	44	46	48	49	49	46	44	45	40	36	36	36	37	32	30	27	25	25
Percentage of PropertyPlantAndEquipmentNet	69.1	67.5	68.0	68.5	70.0	70.3	71.1	69.5	70.2	74.6	75.6	76.2	77.0	79.7	79.7	79.6	79.0	80.6	80.1	78.8	78.2	78.4	77.5	76.3	76.4	78.0	77.3	75.6	73.7	74.1	74.5	74.1	71.5	70.3	71.3	71.9	68.5	67.7	67.5	66.8	68.1
Percentage of Assets	1.1	1.1	1.1	1.3	1.3	1.3	1.2	1.4	1.4	1.4	1.4	1.4	1.4	1.5	1.5	1.6	1.5	1.6	1.6	1.6	1.7	1.7	1.8	1.7	1.7	1.8	1.8	1.8	1.6	1.6	1.7	1.6	1.4	1.4	1.4	1.5	1.3	1.3	1.2	1.1	1.2
Percentage of Assets country:US	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	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:EMEA

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	5.252	5.688	2.082	1.932	1.947	2.0	5.532	7.694	4.443	8.148	7.12	6.326	6.363	5.162	5.114
Percentage of PropertyPlantAndEquipmentNet	5.7	6.1	2.2	2.1	2.2	2.4	6.6	10.9	6.5	12.9	11.5	10.9	11.3	9.2	9.0
Percentage of Assets	0.1	0.1	0.0	0.0	0.0	0.0	0.1	0.2	0.1	0.2	0.2	0.2	0.2	0.2	0.2
Percentage of Assets us-gaap:EMEA	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Goodwill

us-gaap:Goodwill

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2019-02-01	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	3110	3036	3038	2491	2474	2398	2413	1771	1775	1748	180	1572	1575	1575	1379	1378	1353	1342	1340	1337	1333	1333	1334	1332	1334	1312	1315	1312	1313	1317	1262	1255	1255	1253	1250	1251	1252	1228	1229	1225	1229	1035	1035	1035	1038
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	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	52.8	52.2	51.1	51.4	53.0	53.0	49.9	49.5	50.5	51.8	0.0	48.1	51.6	51.5	46.6	46.9	47.6	48.6	48.0	47.7	48.8	48.5	48.4	48.8	49.4	47.8	49.0	47.3	47.1	47.1	45.2	46.1	47.9	48.7	48.1	48.0	49.0	48.9	48.9	50.0	52.4	46.3	47.5	48.7	54.1

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30
Value	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	14	14	24	24	24	25	25	25	22	22	22	19
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	0.5	0.5	0.9	0.9	1.0	1.0	1.0	1.0	0.9	0.9	0.9	0.8

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:TradeNames

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2011-12-31
Value	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	0.357	14	14	14	14	24	24	24	25	25	22
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	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	0.5	0.5	0.5	0.5	0.9	0.9	1.0	1.0	1.0	0.9
Percentage of Assets us-gaap:TradeNames	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	689	677	694	474	481	458	476	267	282	278	211	219	229	146	157	154	153	164	172	184	196	209	220	233	232	244	259	277	298	286	291	305	318	331	351	368	348	365	383	396	257	267	278	322
Percentage of IntangibleAssetsNetExcludingGoodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	11.7	11.6	11.7	9.8	10.3	10.1	9.9	7.5	8.0	8.3	6.5	7.2	7.5	4.9	5.4	5.4	5.6	5.9	6.2	6.8	7.2	7.6	8.1	8.6	8.5	9.1	9.3	10.0	10.7	10.3	10.7	11.7	12.4	12.8	13.5	14.4	13.9	14.5	15.7	16.9	11.5	12.3	13.1	16.8

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	689	677	694	474
Percentage of FiniteLivedIntangibleAssetsNet	100.0	100.0	100.0	100.0
Percentage of Assets	11.7	11.6	11.7	9.8

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31
Value	125	125	137	115	117	120	105	104	104	99	0.0
Percentage of OperatingLeaseRightOfUseAsset	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	2.1	2.2	2.3	2.4	2.5	2.7	2.2	2.9	3.0	3.0	0.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	228	201	225	189	191	152	180	134	124	97	82	53	39	34	35	33	25	19	24	17	16	5.966	5.757	5.665	6.079	6.346	6.187	4.074	5.703	8.19	10	13	15	19	24	45	31	34	46	48	49	51	56	5.848
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.9	3.5	3.8	3.9	4.1	3.4	3.7	3.8	3.5	2.9	2.5	1.7	1.3	1.2	1.2	1.2	0.9	0.7	0.9	0.6	0.6	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.2	0.3	0.4	0.5	0.6	0.8	0.9	1.8	1.3	1.4	1.9	2.1	2.2	2.4	2.6	0.3

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

Period End	2021-06-30
Value	3078000.0
Percentage of EquitySecuritiesFvNi	100.0
Percentage of Assets	0.1

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1

Period End	2021-06-30
Value	3078000.0
Percentage of EquitySecuritiesFvNi	100.0
Percentage of Assets	0.1
Percentage of Assets us-gaap:FairValueInputsLevel1	0.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	9.608	16	18	10	10	12	14	8.172	9.865	11	7.953	6.767	7.598	7.259	6.042	4.257	5.245	4.839	7.395	3.996	4.218	4.302	4.865	3.22	4.786	3.689	3.421	3.225	4.551	5.272	7.939	3.349	3.384	3.387	4.924	4.054	3.892	5.572	6.987	4.423	4.537	4.321	2.241	2.426
Percentage of AccountsPayableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	0.2	0.3	0.3	0.2	0.2	0.3	0.3	0.2	0.3	0.3	0.2	0.2	0.2	0.2	0.2	0.1	0.2	0.2	0.3	0.1	0.2	0.2	0.2	0.1	0.2	0.1	0.1	0.1	0.2	0.2	0.3	0.1	0.1	0.1	0.2	0.2	0.2	0.2	0.3	0.2	0.2	0.2	0.1	0.1

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	8.98	6.26	26	29	28	9.689	9.996	7.278	9.264	15	8.726	5.911	5.7	4.87	5.76	4.436	4.129	6.688	5.263	3.299	3.124	16	4.695	3.0	3.875	14	7.127	6.094	5.737	16	9.333	7.444	5.909	6.674	8.182	7.875	7.874	7.669	6.213	6.575	2.568	3.427	6.179	12
Percentage of AccruedIncomeTaxesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	0.2	0.1	0.4	0.6	0.6	0.2	0.2	0.2	0.3	0.5	0.3	0.2	0.2	0.2	0.2	0.2	0.1	0.2	0.2	0.1	0.1	0.6	0.2	0.1	0.1	0.5	0.3	0.2	0.2	0.6	0.3	0.3	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.1	0.2	0.3	0.6

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-06-30	2018-12-31
Value	119	95	154	86	89	61	106	97	79
Percentage of AccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.0	1.6	2.6	1.8	1.9	1.4	2.2	2.8	2.4

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2017-12-31
Value	338	366	372	326	325	352	351	291	321	330	328	272	306	440
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	100.0	100.0
Percentage of Assets	5.7	6.3	6.3	6.7	7.0	7.8	7.3	8.1	9.1	9.8	10.1	8.9	10.0	15.0

Liabilities Current

us-gaap:LiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	595	624	728	561	543	537	695	473	505	503	524	415	435	442	608	496	514	528	539	454	467	474	484	411	430	444	465	407	447	441	440	386	425	419	477	453	463	457	438	371	347	330	311	266
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	10.1	10.7	12.3	11.6	11.6	11.9	14.4	13.2	14.4	14.9	16.1	13.6	14.2	14.9	20.7	17.4	18.6	18.9	19.2	16.6	17.0	17.2	17.7	15.2	15.7	16.6	16.8	14.6	16.0	15.8	16.2	14.8	16.5	16.1	18.3	17.7	18.5	18.2	17.9	15.8	15.5	15.2	14.6	13.9

Long Term Debt Current

us-gaap:LongTermDebtCurrent

Period End	2021-03-31	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31
Value	4.688	0.0	0.0	75	0.0	0.0	26	26	53
Percentage of LongTermDebtCurrent	100.0	0.0	0.0	100.0	0.0	0.0	100.0	100.0	100.0
Percentage of Assets	0.1	0.0	0.0	1.5	0.0	0.0	1.0	1.0	2.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	24	23	23	20
Percentage of OperatingLeaseLiabilityCurrent	100.0	100.0	100.0	100.0
Percentage of Assets	0.4	0.4	0.4	0.4

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	186	204	199	142	142	139	142	111	123	124	99	83	82	95	86	65	65	81	73	56	60	60	63	53	62	65	74	63	74	69	69	60	61	59	61	54	54	55	55	46	43	44	41	32
Percentage of OtherAccruedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	3.5	3.4	2.9	3.0	3.1	3.0	3.1	3.5	3.7	3.0	2.7	2.7	3.2	2.9	2.3	2.4	2.9	2.6	2.1	2.2	2.2	2.3	2.0	2.3	2.5	2.7	2.3	2.7	2.5	2.5	2.3	2.4	2.3	2.4	2.1	2.2	2.2	2.3	2.0	2.0	2.1	1.9	1.7

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	1045	1082	1113	694	690	696	690	184	189	184	91	92	115	109	87	62	56	54	53	46	44	50	51	78	74	85	91	126	132	142	145	143	152	174	189	208	228	239	255	283	250	271	285	340
Percentage of LiabilitiesNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	17.7	18.6	18.8	14.3	14.8	15.4	14.3	5.2	5.4	5.5	2.8	3.0	3.8	3.7	3.0	2.2	2.1	2.0	1.9	1.7	1.6	1.8	1.9	2.9	2.7	3.2	3.3	4.5	4.7	5.1	5.4	5.5	5.9	6.7	7.3	8.2	9.1	9.5	10.4	12.1	11.2	12.4	13.4	17.7

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	753	793	798	423	423	423	423	0.0
Percentage of LongTermDebtNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0
Percentage of Assets	12.8	13.6	13.4	8.7	9.1	9.4	8.8	0.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	103	102	110	63	66	69	78	31	36	30
Percentage of DeferredIncomeTaxLiabilitiesNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.8	1.8	1.9	1.3	1.4	1.5	1.6	0.9	1.0	0.9

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	79	76	84	105	96	96	96	62	62	58	61	62	76	80	85	60	54	52	50	44	41	43	49	48	45	50	54	52	54	60	60	60	67	90	96	111	106	107	100	93	74	83	82	34
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.4	1.3	1.4	2.2	2.1	2.1	2.0	1.7	1.8	1.7	1.9	2.0	2.5	2.7	2.9	2.1	2.0	1.9	1.8	1.6	1.5	1.6	1.8	1.8	1.6	1.9	2.0	1.9	1.9	2.2	2.2	2.3	2.6	3.5	3.7	4.4	4.3	4.3	4.1	4.0	3.3	3.8	3.9	1.8

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-03-31	2018-12-31
Value	108	109	120	101	103	107	91	87	0.0
Percentage of OperatingLeaseLiabilityNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0
Percentage of Assets	1.8	1.9	2.0	2.1	2.2	2.4	1.9	2.6	0.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	20	19	24	20
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	100.0	100.0	100.0	100.0
Percentage of Assets	0.3	0.3	0.4	0.4

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	18	17	21	15
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree	100.0	100.0	100.0	100.0
Percentage of Assets	0.3	0.3	0.4	0.3

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	17	16	20	14
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour	100.0	100.0	100.0	100.0
Percentage of Assets	0.3	0.3	0.3	0.3

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

Period End	2020-12-31
Value	17
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive	100.0
Percentage of Assets	0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

Period End	2020-12-31
Value	50
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	100.0
Percentage of Assets	0.8

Operating Lease Liability

us-gaap:OperatingLeaseLiability

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2019-01-01
Value	132	132	144	122	109	107	107	102	92
Percentage of OperatingLeaseLiability	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.2	2.3	2.4	2.5	2.3	3.0	3.1	3.0	0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	147	148	161	139
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue	100.0	100.0	100.0	100.0
Percentage of Assets	2.5	2.5	2.7	2.9

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	14	15	16	17
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	100.0	100.0	100.0	100.0
Percentage of Assets	0.3	0.3	0.3	0.4

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	4250	4111	4097	3589	3438	3292	3453	2923	2817	2684	2649	2548	2507	2407	2245	2287	2189	2211	2208	2229	2235	2233	2194	2211	2241	2151	2217	2255	2219	2208	2136	2088	1997	2005	1940	1896	1820	1820	1754	1693	1640	1576	1529	1312	1182	641
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	72.2	70.7	69.0	74.1	73.6	72.7	71.4	81.6	80.2	79.6	81.1	83.4	82.0	81.4	76.3	80.4	79.3	79.1	78.9	81.7	81.4	81.0	80.4	81.9	81.6	80.2	79.9	80.9	79.3	79.1	78.5	79.8	77.6	77.2	74.4	74.1	72.5	72.3	71.7	72.1	73.3	72.4	71.9	68.4	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	-32.822	-37.039	-17.775	-51.337	-79.385	-89.673	-65.381	-90.141	-69.379	-69.937	-62.379	-60.891	-55.789	-29.601	-37.844	-57.652	-52.164	-31.754	-2.644	8.651	11	16	8.812	-1.484	16
Percentage of StockholdersEquity	-0.8	-0.9	-0.4	-1.4	-2.3	-2.7	-1.9	-3.1	-2.5	-2.6	-2.4	-2.4	-2.2	-1.2	-1.7	-2.6	-2.4	-1.4	-0.1	0.4	0.7	1.1	0.7	-0.1	2.5
Percentage of Assets	-0.6	-0.6	-0.3	-1.1	-1.7	-2.0	-1.4	-2.5	-2.0	-2.1	-1.9	-2.0	-1.8	-1.0	-1.3	-2.1	-1.9	-1.1	-0.1	0.3	0.5	0.8	0.5	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	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	1381	1346	1434	1182	1144	1118	1188	865	839	824	867	850	837	833	873	883	894	904	926	927	905	856	801	806	355
Percentage of StockholdersEquity	32.5	32.7	35.0	32.9	33.3	34.0	34.4	29.6	29.8	30.7	32.7	33.4	33.4	34.6	38.9	40.0	40.8	40.8	43.3	47.8	51.6	56.0	61.1	68.2	55.4
Percentage of Assets	23.5	23.1	24.1	24.4	24.5	24.7	24.6	24.2	23.9	24.5	26.6	27.8	27.4	28.2	29.7	31.5	32.8	32.6	34.0	35.6	37.0	40.3	41.7	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	0.0	0.0	0.0	0.0

us-gaap:CommonStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	0.953	0.953	0.953	0.946	0.946	0.946	0.946	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.932	0.927	0.916	0.897	0.897	0.783
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	0.0	0.0	0.0	0.0	0.1	0.1	0.1	0.1	0.1
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
Percentage of Assets 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	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	3970	3876	3804	3588	3513	3416	3370	3204	3115	3005	2919	2766	2676	2584	2316	2057	1792	1539	1284	1039	836	655	502	385	274
Percentage of StockholdersEquity	93.4	94.3	92.8	100.0	102.2	103.8	97.6	109.6	110.6	112.0	110.2	108.5	106.8	107.4	103.2	93.2	81.7	69.4	60.1	53.6	47.7	42.8	38.3	32.6	42.8
Percentage of Assets	67.4	66.6	64.0	74.1	75.2	75.5	69.7	89.5	88.7	89.1	89.4	90.5	87.5	87.3	78.8	73.5	65.6	55.5	47.2	39.9	34.1	30.8	26.2	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	0.0	0.0	0.0	0.0

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31	2007-12-31
Value	-1070.21	-1075.537	-1124.102	-1131.084	-1141.04	-1153.863	-1041.831	-1057.955	-1069.354	-1077.252	-1075.879	-1008.37	-951.912	-981.713	-907.53	-675.55	-440.839	-196.01	-72.891	-36.151	0.0	0.0	-0.853	-9.079	-5.182
Percentage of StockholdersEquity	-25.2	-26.2	-27.4	-31.5	-33.2	-35.0	-30.2	-36.2	-38.0	-40.1	-40.6	-39.6	-38.0	-40.8	-40.4	-30.6	-20.1	-8.8	-3.4	-1.9	0.0	0.0	-0.1	-0.8	-0.8
Percentage of Assets	-18.2	-18.5	-18.9	-23.3	-24.4	-25.5	-21.5	-29.5	-30.4	-31.9	-32.9	-33.0	-31.1	-33.2	-30.9	-24.1	-16.1	-7.1	-2.7	-1.4	0.0	0.0	-0.0	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	0.0	0.0	0.0	0.0

Common Stock Value

us-gaap:CommonStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	953000.0	953000.0	953000.0	946000.0	946000.0	946000.0	946000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	932000.0	931000.0	927000.0	923000.0	922000.0	920000.0	916000.0	897000.0
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	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	0.0	0.0	0.0	0.0	0.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	1381	1346	1434	1182	1144	1118	1188	865	839	824	867	850	837	833	873	865	855	853	883	884	884	882	894	891	888	891	904	911	916	915	926	921	921	916	927	935	934	926	905	888	873	869	856	801
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	23.5	23.1	24.1	24.4	24.5	24.7	24.6	24.2	23.9	24.5	26.6	27.8	27.4	28.2	29.7	30.4	31.0	30.5	31.5	32.4	32.2	32.0	32.8	33.0	32.4	33.2	32.6	32.7	32.8	32.8	34.0	35.2	35.8	35.2	35.6	36.6	37.2	36.8	37.0	37.8	39.0	39.9	40.3	41.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	3970	3876	3804	3588	3513	3416	3370	3204	3115	3005	2919	2766	2676	2584	2316	2264	2190	2120	2057	1987	1918	1848	1792	1724	1657	1595	1539	1469	1404	1341	1284	1208	1146	1090	1039	983	931	881	836	788	743	697	655	502
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	67.4	66.6	64.0	74.1	75.2	75.5	69.7	89.5	88.7	89.1	89.4	90.5	87.5	87.3	78.8	79.6	79.3	75.9	73.5	72.8	69.8	67.0	65.6	63.8	60.4	59.5	55.5	52.7	50.2	48.0	47.2	46.2	44.5	41.9	39.9	38.4	37.1	35.0	34.1	33.6	33.2	32.0	30.8	26.2

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	-32.822	-37.039	-17.775	-51.337	-79.385	-89.673	-65.381	-90.141	-69.379	-69.937	-62.379	-60.891	-55.789	-29.601	-37.844	-39.427	-43.576	-50.083	-57.652	-37.897	-39.941	-41.093	-52.164	-46.366	-44.512	-49.384	-31.754	-18.534	0.814	-1.713	-2.644	-0.174	-5.651	-0.274	8.651	14	7.324	11	11	15	23	20	16	8.812
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	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-0.6	-0.6	-0.3	-1.1	-1.7	-2.0	-1.4	-2.5	-2.0	-2.1	-1.9	-2.0	-1.8	-1.0	-1.3	-1.4	-1.6	-1.8	-2.1	-1.4	-1.5	-1.5	-1.9	-1.7	-1.6	-1.8	-1.1	-0.7	0.0	-0.1	-0.1	-0.0	-0.2	-0.0	0.3	0.6	0.3	0.5	0.5	0.7	1.0	0.9	0.8	0.5

Treasury Stock Value

us-gaap:TreasuryStockValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2011-12-31	2011-03-31	2010-12-31	2009-12-31
Value	1070	1075	1124	1131	1141	1153	1041	1057	1069	1077	1075	1008	951	981	907	804	814	713	675	605	527	456	440	358	261	287	196	107	103	48	72	43	65	1.62	36	37	54	0.0	11	0.0	0.853
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	0.0	100.0	0.0	100.0
Percentage of Assets	18.2	18.5	18.9	23.3	24.4	25.5	21.5	29.5	30.4	31.9	32.9	33.0	31.1	33.2	30.9	28.3	29.5	25.5	24.1	22.2	19.2	16.6	16.1	13.3	9.5	10.7	7.1	3.9	3.7	1.7	2.7	1.6	2.5	0.1	1.4	1.5	2.2	0.0	0.5	0.0	0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	118	171	173	94	131	147	139	120	88	151	132	109	111	132	103	88	112	125	96	81	70	108	109	77	66	114	92	81	79	131	84	65	87	95	69	70	74	83	77	66	78	84	-25.265	72	60	59
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	100.0	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 Revenues	26.6	47.1	27.9	25.8	34.1	48.3	28.7	35.0	24.0	47.8	32.0	38.0	36.3	46.8	34.2	32.3	42.5	49.7	35.6	33.3	28.5	48.1	43.4	32.7	28.2	52.4	36.3	34.9	34.4	61.2	36.0	30.8	40.6	48.3	31.5	35.7	38.4	45.1	39.2	38.3	48.6	53.7	-15.2	51.7	43.7	43.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-100460000.0	-15863000.0	-483660000.0	-11024000.0	-109970000.0	-9599000.0	-500100000.0	-22171000.0	-59594000.0	-251680000.0	-12067000.0	-6360000.0	-288020000.0	-7236000.0	-35820000.0	-36373000.0	-14365000.0	-10885000.0	-12599000.0	-3250000.0	-13633000.0	-2691000.0	-10373000.0	-33490000.0	-4003000.0	-14166000.0	-5956000.0	-8746000.0	-92035000.0	-22533000.0	-14756000.0	-5469000.0	-8835000.0	-4117000.0	-4791000.0	-49911000.0	-9510000.0	-4744000.0	-9311000.0	-274630000.0	-4280000.0	-3418000.0	-4439000.0	-4714000.0	-2474000.0	4979000.0
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	100.0	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 Revenues	-22.5	-4.4	-77.5	-3.0	-28.5	-3.1	-102.9	-6.4	-16.2	-79.4	-2.9	-2.2	-94.1	-2.6	-11.8	-13.2	-5.4	-4.3	-4.7	-1.3	-5.5	-1.2	-4.1	-14.1	-1.7	-6.5	-2.3	-3.7	-39.6	-10.5	-6.3	-2.6	-4.1	-2.1	-2.2	-25.3	-4.9	-2.6	-4.7	-158.8	-2.6	-2.2	-2.7	-3.4	-1.8	3.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-47.895	-74.208	372	9.705	3.187	-288.738	499	5.522	-6.467	-69.091	-75.392	-66.074	8.196	-129.405	-109.277	5.328	-112.368	-78.334	-79.621	-86.23	-77.425	-36.201	-86.313	-106.535	12	-111.523	-103.673	-23.271	-64.199	5.501	-34.069	-16.294	-67.513	-11.883	-41.762	-20.972	-64.514	2.402	0.332	-5.017	4.238	-9.229	8.452	-1.34	-28.384	-8.367
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	100.0	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 Revenues	-10.7	-20.4	59.7	2.6	0.8	-94.7	102.7	1.6	-1.8	-21.8	-18.1	-22.8	2.7	-45.7	-36.1	1.9	-42.6	-30.9	-29.4	-35.1	-31.5	-16.0	-34.3	-44.8	5.4	-51.2	-40.8	-9.9	-27.6	2.6	-14.4	-7.7	-31.4	-6.0	-18.9	-10.7	-33.1	1.3	0.2	-2.9	2.6	-5.8	5.1	-1.0	-20.6	-6.1

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-29.723	74	67	100	26	-154.346	139	101	24	-169.748	47	33
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	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 Revenues	-6.7	20.6	10.9	27.3	6.9	-50.6	28.7	29.4	6.5	-53.5	11.5	11.5

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-5546000.0	-3564000.0	-8305000.0	-6943000.0	-10242000.0	-5442000.0	-1290000.0	-6983000.0	-4851000.0	-1387000.0	-5500000.0	-16232000.0	-8698000.0	-3245000.0	1524000.0	-8908000.0	-4600000.0	9291000.0	-7819000.0	-6484000.0	-5294000.0	8676000.0	-7895000.0	-10576000.0	-3841000.0	7116000.0	-5161000.0	-7729000.0	-6325000.0	356000.0	-5841000.0	-10826000.0	-6473000.0	-885000.0	-6217000.0	-6783000.0	-7685000.0	1789000.0	14000.0	-3896000.0	-2177000.0	3038000.0	-6068000.0	-8756000.0	-7864000.0	-4031000.0
Percentage of DeferredIncomeTaxExpenseBenefit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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 Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	66	-159.038	222	17	38	-117.83	141	9.661	46	-43.983	106	-4.832	-5.017	-22.507	32	6.996	-9.835	-15.06	23	-0.48	3.739	-9.86	0.663	4.545	7.155	-18.407	19	-2.753	3.998	-15.338	18	-4.506	4.464	-15.14	22	-10.229	5.277	-5.632	20	-2.444	-2.824	-6.804	23	-11.719	-2.069	1.823
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	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	118	171	173	94	131	147	139	120	88	151	132	109	111	132	103	88	112	125	96	81	70	108	109	77	66	114	92	81	79	131	84	65	87	95	69	70	74	83	77	66	78	84	-25.265	72	60	59
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	100.0	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 Revenues	26.6	47.1	27.9	25.8	34.1	48.3	28.7	35.0	24.0	47.8	32.0	38.0	36.3	46.8	34.2	32.3	42.5	49.7	35.6	33.3	28.5	48.1	43.4	32.7	28.2	52.4	36.3	34.9	34.4	61.2	36.0	30.8	40.6	48.3	31.5	35.7	38.4	45.1	39.2	38.3	48.6	53.7	-15.2	51.7	43.7	43.9

Net Income Loss

us-gaap:NetIncomeLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	93	72	215	75	96	46	165	89	109	86	153	89	92	84	52	73	69	63	69	69	69	56	68	66	62	56	69	65	63	56	75	62	55	51	56	51	50	45	47	45	45	42	49	36	35	32
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	100.0	100.0	100.0	100.0
Percentage of Revenues	21.0	19.9	34.6	20.6	25.0	15.1	34.1	26.0	29.8	27.2	36.9	30.9	30.3	29.8	17.4	26.7	26.4	25.0	25.9	28.3	28.3	25.0	27.0	27.8	26.5	25.8	27.4	28.0	27.1	26.3	32.2	29.4	26.0	25.8	25.4	26.2	25.8	24.6	23.9	26.3	28.0	26.7	29.5	25.8	25.8	23.8

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	93	72	75	96	46	89	109	86	89	92	84
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 Revenues	21.0	19.9	20.6	25.0	15.1	26.0	29.8	27.2	30.9	30.3	29.8
Percentage of Revenues 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

Share Based Compensation

us-gaap:ShareBasedCompensation

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	42	35	42	38	34	30	31	31	29	23	24	22	20	15	13	14	14	10	8.783	8.952	8.534	7.078	8.22	8.87	9.03	7.831	9.278	9.953	10	7.465	8.556	9.081	8.874	8.787	8.485	8.104	8.024	7.802	6.514	6.108	5.319	5.147	5.116	4.743	4.656	4.504
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	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-100460000.0	-15863000.0	-483660000.0	-11024000.0	-109970000.0	-9599000.0	-500100000.0	-22171000.0	-59594000.0	-251680000.0	-12067000.0	-6360000.0	-288020000.0	-7236000.0	-35820000.0	-36373000.0	-14365000.0	-10885000.0	-12599000.0	-3250000.0	-13633000.0	-2691000.0	-10373000.0	-33490000.0	-4003000.0	-14166000.0	-5956000.0	-8746000.0	-92035000.0	-22533000.0	-14756000.0	-5469000.0	-8835000.0	-4117000.0	-4791000.0	-49911000.0	-9510000.0	-4744000.0	-9311000.0	-274630000.0	-4280000.0	-3418000.0	-4439000.0	-4714000.0	-2474000.0	4979000.0
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	100.0	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 Revenues	-22.5	-4.4	-77.5	-3.0	-28.5	-3.1	-102.9	-6.4	-16.2	-79.4	-2.9	-2.2	-94.1	-2.6	-11.8	-13.2	-5.4	-4.3	-4.7	-1.3	-5.5	-1.2	-4.1	-14.1	-1.7	-6.5	-2.3	-3.7	-39.6	-10.5	-6.3	-2.6	-4.1	-2.1	-2.2	-25.3	-4.9	-2.6	-4.7	-158.8	-2.6	-2.2	-2.7	-3.4	-1.8	3.7

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	5.79	5.045	11	7.228	9.98	6.987	19	8.835	10	6.9	8.685	6.326	3.818	2.933	4.334	7.313	3.445	4.057	4.224	2.151	3.373	2.695	5.38	3.083	4.06	3.622	5.395	8.705	7.831	4.092	14	5.467	4.593	4.087	6.095	3.552	9.587	4.743	9.539	4.919	4.264	3.341	5.105	4.736	2.549	1.87
Percentage of PaymentsToAcquireProductiveAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-47.895	-74.208	372	9.705	3.187	-288.738	499	5.522	-6.467	-69.091	-75.392	-66.074	8.196	-129.405	-109.277	5.328	-112.368	-78.334	-79.621	-86.23	-77.425	-36.201	-86.313	-106.535	12	-111.523	-103.673	-23.271	-64.199	5.501	-34.069	-16.294	-67.513	-11.883	-41.762	-20.972	-64.514	2.402	0.332	-5.017	4.238	-9.229	8.452	-1.34	-28.384	-8.367
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	100.0	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 Revenues	-10.7	-20.4	59.7	2.6	0.8	-94.7	102.7	1.6	-1.8	-21.8	-18.1	-22.8	2.7	-45.7	-36.1	1.9	-42.6	-30.9	-29.4	-35.1	-31.5	-16.0	-34.3	-44.8	5.4	-51.2	-40.8	-9.9	-27.6	2.6	-14.4	-7.7	-31.4	-6.0	-18.9	-10.7	-33.1	1.3	0.2	-2.9	2.6	-5.8	5.1	-1.0	-20.6	-6.1

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	0.0	0.0	0.0	161	0.0	0.0	14	44	77	74	0.0	117	112	0.0	122	100	93	114	86	42	95	114	3.089	125	125	36	72	0.0	42	0.0	33	0.0	61	0.0	0.0	0.0	0.0	12	0.0	0.0	0.0	0.0
Percentage of PaymentsForRepurchaseOfCommonStock	0.0	0.0	0.0	100.0	0.0	0.0	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	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	0.0	100.0	0.0	100.0	0.0	0.0	0.0	0.0	100.0	0.0	0.0	0.0	0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	27.3	-52.0	4.7	16.1	0.142	-0.382	-15.264	17.8	0.155	0.126
Percentage of EffectiveIncomeTaxRateContinuingOperations	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

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31
Value	648000.0	984000.0	1484000.0	2170000.0	3136000.0	3986000.0	4932000.0	6166000.0	7122000.0	7545000.0	7319000.0	8110000.0	9216000.0
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

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31
Value	74.26	67.49	62.8	59.17	56.37	51.07	48.76	44.77	42.85	35.1	29.92	22.94	16.91
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

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	81	54	3.447	29	38	28	1.461	1.793	2.276	2.227	2.259	22	55	148	111
Percentage of DeferredTaxLiabilities	100.0	100.0	100.0	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 Net

us-gaap:DeferredTaxAssetsNet

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	143	109	81	73	45	39	34	99	108	109	88	80	73	59
Percentage of DeferredTaxAssetsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31	2008-12-31
Value	24	49	22	19	15	16	16	19	37	31	19	10	12
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

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	15	17	2.127	1.906	1.625	0.603	0.13	0.392	0.014	0.008	0.977
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

anss:AllocatedShareBasedCompensationExpenseNetofTaxPerBasicShare

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	-0.39	0.09	-0.38	-0.33	-0.27	-0.06	-1.47	0.26	0.24	-0.15	-0.92	0.17	0.12
Percentage of AllocatedShareBasedCompensationExpenseNetofTaxPerBasicShare	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:AllocatedShareBasedCompensationExpenseNetofTaxPerDilutedShare

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	-0.39	0.09	-0.37	-0.32	-0.27	-0.06	-1.44	0.26	0.23	-0.15	-0.9	0.17	0.12
Percentage of AllocatedShareBasedCompensationExpenseNetofTaxPerDilutedShare	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:ContractWithCustomerLiabilityAdditions

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	415	362	662	363	352	308	541	316	356	318	471	254
Percentage of ContractWithCustomerLiabilityAdditions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:ContractWithCustomerLiabilityRevenueRecognizedIncludingAmountsNotPreviouslyIncluded

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	446	363	623	366	385	304	486	343	368	317	415	289
Percentage of ContractWithCustomerLiabilityRevenueRecognizedIncludingAmountsNotPreviouslyIncluded	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:ContractWithCustomerLiabilityTranslationGainLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	1.106	-6.898	5.747	5.942	1.72	-3.355	3.548	-4.485	1.896	-2.396	0.711	-2.124
Percentage of ContractWithCustomerLiabilityTranslationGainLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:DebtInstrumentBasisSpeadonFederalFundsRate us-gaap:VariableRate

anss:DebtInstrumentBasisSpeadonFederalFundsRate

us-gaap:BaseRate

Period End	2021-06-30	2021-03-31
Value	0	0.5
Percentage of DebtInstrumentBasisSpeadonFederalFundsRate	0.0	100.0

anss:DebtInstrumentBasisSpreadonEurodollarRate us-gaap:VariableRate

anss:DebtInstrumentBasisSpreadonEurodollarRate

us-gaap:BaseRate

Period End	2021-06-30	2021-03-31
Value	0	1.0
Percentage of DebtInstrumentBasisSpreadonEurodollarRate	0.0	100.0

us-gaap:AdjustmentForAmortization

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30
Value	19	19	15	14	13	13	11	8.5	8.6	8.3	7.005	9.021	12	12	13	12	12	12	12	12	12	12	14	14	14	14	15	16	15	14	14	14	15	15	16	17	16	16	15	13	11
Percentage of AdjustmentForAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:AllocatedShareBasedCompensationExpenseNetOfTax

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	34	-7.506	32	28	23	5.035	14	22	19	12	20	14	10	3.965	17	8.693	6.643	0.092	6.173	5.959	5.642	5.035	5.018	6.145	6.119	5.013	6.054	7.11	7.361	5.409	5.95	6.458	6.403	5.391	6.306	6.042	6.001	5.557	4.759	4.815	3.986	3.976	3.845	3.72	3.648
Percentage of AllocatedShareBasedCompensationExpenseNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:AmortizationOfLeasedAsset

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	5.401	5.699	5.635	5.12	5.141	5.075	4.547	4.942	4.487	4.483
Percentage of AmortizationOfLeasedAsset	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	722
Percentage of BusinessCombinationConsiderationTransferred1	100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

anss:AnalyticalGraphicsInc, us-gaap:SubsequentEvent

Period End	2020-10-23
Value	700
Percentage of BusinessCombinationConsiderationTransferred1	0.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	218
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	100.0

us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	14
Percentage of BusinessCombinationConsiderationTransferredLiabilitiesIncurred	100.0

us-gaap:BusinessCombinationConsiderationTransferredOther1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredOther1

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	489
Percentage of BusinessCombinationConsiderationTransferredOther1	100.0

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

us-gaap:ConcentrationRiskPercentage1

us-gaap:SalesRevenueNet, anss:SalesChannelConcentrationRisk, us-gaap:SalesChannelDirectlyToConsumer

Period End	2021-06-30	2020-06-30
Value	75.4	78.1
Percentage of ConcentrationRiskPercentage1	100.0	100.0

us-gaap:SalesRevenueNet, anss:SalesChannelConcentrationRisk, us-gaap:SalesChannelThroughIntermediary

Period End	2021-06-30	2020-06-30
Value	24.6	21.9
Percentage of ConcentrationRiskPercentage1	32.6	28.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:ContractWithCustomerSalesChannel

us-gaap:SalesChannelDirectlyToConsumer

Period End	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30
Value	71.8	74.9	0.781	0.736	0.768	0.797	0.705	0.755	0.763
Percentage of ConcentrationRiskPercentage1	0.0	0.0	1.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:SalesChannelThroughIntermediary

Period End	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30
Value	28.2	25.1	0.219	0.264	0.232	0.203	0.295	0.245	0.237
Percentage of ConcentrationRiskPercentage1	0.0	0.0	0.3	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	5.467	0.0	1.405	0.0	3.614	0.0	0.917	2.349	-3.73	3.5	2.8
Percentage of ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	100.0	0.0	100.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	164	209	121	152	191	66	103	132	172	52	83	105	145
Percentage of ContractWithCustomerLiabilityRevenueRecognized	100.0	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:CostOfGoodsAndServicesSoldAmortization

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30
Value	15	14	11	9.911	9.764	9.552	7.646	4.762	4.755	4.547	3.631	5.53	9.087	8.786	9.902	9.004	8.952
Percentage of CostOfGoodsAndServicesSoldAmortization	100.0	100.0	100.0	100.0	100.0	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:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:Range, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

srt:Maximum, us-gaap:BaseRate

Period End	2021-03-31	2020-03-31	2019-03-31
Value	0.75	0.0075	0.0075
Percentage of DebtInstrumentBasisSpreadOnVariableRate1	100.0	100.0	100.0

srt:Maximum, us-gaap:Eurodollar

Period End	2021-03-31	2020-03-31
Value	1.75	0.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate1	233.3	233.3

srt:Minimum, us-gaap:BaseRate

Period End	2021-03-31	2020-03-31	2019-03-31
Value	0.125	0.00125	0.00125
Percentage of DebtInstrumentBasisSpreadOnVariableRate1	16.7	16.7	16.7

srt:Minimum, us-gaap:Eurodollar

Period End	2021-03-31	2020-03-31
Value	1.125	0.01125
Percentage of DebtInstrumentBasisSpreadOnVariableRate1	150.0	150.0

us-gaap:DepreciationAndAmortization

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	27	27	23	20	20	20	18	14	9.62	17	11	13	17	16	17	16	16	16	17	17	17	17	18	19	19	19	20	21	20	19	19	19	20	20	21	21	21	20	19	17	14	14	15	15	15	15
Percentage of DepreciationAndAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-0.244	-6.281	5.384	6.975	1.986	-3.421	0.614	-2.49	1.586	-0.552	2.484	-4.241
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	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:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	8.783	42	9.636	10	10	25	17	9.847	9.152	11	4.207	8.611	10	11	-3.477	6.08	7.479	10	2.61	2.993	2.892	2.043	3.202	2.725	2.911	2.818	3.224	2.843	2.804	2.056	2.606	2.623	2.471	3.396	2.179	2.062	2.023	2.245	1.755	1.293	1.333	1.171	9.039	1.023	1.008
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:GoodwillForeignCurrencyTranslationGainLoss

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30
Value	3.558	-9.738	20	17	5.949	-14.26	17	-13.788	-0.386	-5.428	-3.222	-1.247	-6.915	0.905	0.385	1.343	2.577	0.59	-2.5	0.134	-0.731	1.781	-1.189	-0.762
Percentage of GoodwillForeignCurrencyTranslationGainLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:GoodwillOtherIncreaseDecrease

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	70	8.215	526	0.268	69	-0.336	623	9.916	27	181
Percentage of GoodwillOtherIncreaseDecrease	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	-6.226	-80.05	97	11	11	-99.112	75	0.927	15	-54.05	51	14	-5.967	-40.009	49	10	-9.795	-23.335	40	2.005	6.631	-32.258	26	0.471	3.245	-36.971	27	-1.145	11	-28.837	30	4.175	9.262	-28.408	19	6.187	6.073	-22.054	18	3.994	6.619	-10.596	8.934	12	3.022	-7.554
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:IncreaseDecreaseInAccruedIncomeTaxesPayable

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	3.007	-20.954	-2.297	2.434	18	1.006	3.122	-2.368	-6.178	5.999	3.667	0.536	-1.31	-1.807	1.436	0.567	-2.091	1.303	4.378	2.236	-12.164	14	3.381	0.126	-7.371	9.634	6.246	4.114	-9.281	11	3.016	3.876	1.566	3.418	6.095	1.398	0.168	6.955	3.192	4.741	2.41	-0.675	-70.257	74	-1.397	7.815
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:IncreaseDecreaseInContractWithCustomerLiability

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30
Value	-29.996	1.204	35	-4.3	-30.462	4.784	53	-25.466	-12.576	2.235	55	-31.963	1.434	31	56	-33.792
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	100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-66.625	12	15	31	-32.364	-12.013	63	-25.993	16	-28.363	53	-24.963
Percentage of IncreaseDecreaseInOtherCurrentAssets	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:IncreaseDecreaseInOtherNoncurrentAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	-0.166	1.909	2.477	3.061	5.854	3.426	3.334	0.814	-1.042	2.516	0.619	-0.144
Percentage of IncreaseDecreaseInOtherNoncurrentAssets	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:IncreaseDecreaseInOtherNoncurrentLiabilities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30
Value	2.909	-11.878	3.862	3.634	-5.002	12	-2.875	-3.798	-0.742	-0.46	-0.1	-14.78
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities	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:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Value	885000.0	1178000.0	21000.0	1426000.0	1283000.0	1571000.0	47000.0	1624000.0	1505000.0	1729000.0	-55000.0	1885000.0	1881000.0	2221000.0	96000.0	1814000.0	1728000.0	1768000.0	-43000.0	1717000.0	1667000.0	1970000.0	-6000.0	1899000.0	1860000.0	2081000.0	-46000.0	2030000.0	2024000.0	2466000.0	61000.0	2724000.0	2180000.0	2258000.0	5000.0	2307000.0	2302000.0	2373000.0	-12000.0	2168000.0	2248000.0	2404000.0	-33000.0	2332000.0	2532000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:InterestPaidCapitalized

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	3.068	2.956	1.956	1.573	2.784	5.628	0.431	0.212	0.138	0.006
Percentage of InterestPaidCapitalized	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InvestmentIncomeInterest

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	0.486	0.517	0.61	0.754	0.934	2.775	3.186	3.188	2.98	3.442	3.745	3.213	2.176	2.285	2.135	1.91	1.668	1.249	1.099	1.083	1.077	0.95	0.704	0.674	0.795	0.656	0.796	0.655	0.71	0.841	0.71	0.656	0.743	0.732	0.798	0.774	0.887	0.901	0.804	0.789	0.712	0.695	0.63	0.491	0.422	0.368
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	100.0	100.0	100.0	100.0

us-gaap:LeaseCost

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	8.042	8.283	7.827	7.239	7.504	7.315	6.835	6.81	6.534	6.082	5.0	6.1	5.3	4.9
Percentage of LeaseCost	100.0	100.0	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:LongTermDebtWeightedAverageInterestRateOverTime

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31
Value	1.45	1.45	-0.24	1.43	0.02575	3.03
Percentage of LongTermDebtWeightedAverageInterestRateOverTime	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLeaseCost

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	7.138	7.001	6.114	6.206	6.28	6.218	5.928	5.684	5.61	5.285
Percentage of OperatingLeaseCost	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLeasePayments

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	7.139	6.827	5.148	5.921	5.668	5.733	5.48	5.242	4.977	4.332
Percentage of OperatingLeasePayments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30
Value	4.217	-19.264	33	28	10	-24.292	24	-20.762	0.558	-7.558	-1.488	-5.102	-26.188
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

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	4.217	-19.264	28	10	-24.292	-20.762	0.558	-7.558	-5.102	-26.188	8.243
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	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:AccumulatedOtherComprehensiveIncome

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	4.217	-19.264	28	10	-24.292	-20.762	0.558	-7.558	-5.102	-26.188	8.243
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherNoncashIncomeExpense

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30
Value	-237000.0	-975000.0	114000.0	-195000.0	-546000.0	-1553000.0	-218000.0	-1024000.0	-443000.0	-1093000.0	1629000.0	-902000.0	-865000.0	-272000.0	220000.0	-215000.0	-389000.0	363000.0	-1501000.0	70000.0	-84000.0	225000.0	60000.0	-1607000.0	100000.0	34000.0	-848000.0	222000.0	-244000.0	2000.0	-24000.0	-2000.0	-8000.0	-39000.0	-64000.0	6000.0	-24000.0	13000.0	31000.0	36000.0	112000.0	1000.0	-122000.0	104000.0
Percentage of OtherNoncashIncomeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:PaymentsForProceedsFromOtherInvestingActivities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31
Value	0.262	0.035	0.354	3.796	2.141	0.264	-11.268	3.672	8.548	0.46	3.382	0.034	1.173	4.303	-6.401	8.926	10	0.964	0.484	1.099	10	-0.004	-0.232	-0.109	0.044	0.067	0.062	0.041	0.085	0.043
Percentage of PaymentsForProceedsFromOtherInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31
Value	4.648	86	4.245	1.378	2.971	62	4.495	2.331	2.611	32	1.924	1.914	0.708	24	1.037	1.038	0.557	8.48	0.013	0.04	0.252	4.752	0.015	0.049	0.139	4.243	0.0	0.0	0.0	5.108	0.0	0.0	0.0	4.269	0.0	0.0	0.0	0.0
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	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	100.0	0.0	0.0	0.0	100.0	0.0	0.0	0.0	0.0

us-gaap:PaymentsToAcquireBusinessesGross

Period End	2021-03-31
Value	10
Percentage of PaymentsToAcquireBusinessesGross	100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	722
Percentage of PaymentsToAcquireBusinessesGross	0.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2011-12-31	2010-12-31
Value	94	10	472	0.0	97	2.348	492	9.664	41	244	0.0	0.0	283	0.0	37	20	0.0	5.864	7.891	0.0	0.0	0.0	5.225	30	-0.101	10	0.499	0.0	84	18	0.0	0.0	4.224	0.0	-1.32	46	-0.267	0.0
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	0.0	100.0	100.0	0.0	100.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	0.0	0.0	100.0	0.0	100.0	100.0	100.0	0.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31
Value	1.752	11	2.603	11	6.158	9.716	5.46	7.853	10	10	3.621	10	13	12	4.511	6.366	11	30	10	25	7.283	10	7.06	6.888	13	15	16	12	5.588	8.572
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:ProceedsFromPaymentsForOtherFinancingActivities

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30
Value	1000.0	-51000.0	0	0	-1520000.0	0	0	-1617000.0	-75000.0	0	-4939000.0	0	0	0	0	0	0	0	0	-1000.0	-6000.0	-5000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities	100.0	100.0	0.0	0.0	100.0	0.0	0.0	100.0	100.0	0.0	100.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	100.0	100.0	100.0

us-gaap:ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities

Period End	2020-09-30	2020-06-30	2020-03-31	2019-06-30	2019-03-31
Value	0	0	-75000000.0	0	0
Percentage of ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities	0.0	0.0	100.0	0.0	0.0

us-gaap:ProvisionForDoubtfulAccounts

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31
Value	642000.0	18000.0	639000.0	127000.0	2556000.0	3116000.0	369000.0	549000.0	1620000.0	390000.0	188000.0	904000.0	421000.0	64000.0	92000.0	201000.0	141000.0	1040000.0	1003000.0	311000.0	568000.0	127000.0	18000.0	453000.0	517000.0	316000.0	459000.0	715000.0	812000.0	118000.0	336000.0	471000.0	368000.0	290000.0	768000.0	140000.0	27000.0	3000.0	126000.0	137000.0	47000.0	94000.0	830000.0	3000.0	504000.0	420000.0
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	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProvisionForDoubtfulAccounts us-gaap:ValuationAllowancesAndReservesType

us-gaap:AllowanceForCreditLoss

Period End	2020-09-30	2020-06-30	2020-03-31
Value	127000.0	2556000.0	3116000.0
Percentage of ProvisionForDoubtfulAccounts	100.0	100.0	100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	5.007	0.587	26	1.076	0.642	19	5.929	6.155	9.272	13
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodSharesAcquisitions us-gaap:BusinessAcquisition, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesAcquisitions

anss:AnalyticalGraphicsInc, us-gaap:CommonStock

Period End	2021-06-30	2020-12-01
Value	1000.0	600000.0
Percentage of StockIssuedDuringPeriodSharesAcquisitions	100.0	100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	63000.0	565000.0	116000.0	146000.0	541000.0	125000.0	241000.0	494000.0	199000.0	313000.0	492000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:BusinessAcquisition

us-gaap:StockIssuedDuringPeriodValueAcquisitions

anss:AnalyticalGraphicsInc

Period End	2021-06-30
Value	0.328
Percentage of StockIssuedDuringPeriodValueAcquisitions	100.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:BusinessAcquisition, us-gaap:StatementEquityComponents

anss:AnalyticalGraphicsInc, us-gaap:AdditionalPaidInCapital

Period End	2021-06-30
Value	0.328
Percentage of StockIssuedDuringPeriodValueAcquisitions	100.0

anss:AnalyticalGraphicsInc, us-gaap:CommonStock

Period End	2020-12-01
Value	217
Percentage of StockIssuedDuringPeriodValueAcquisitions	0.0

anss:AnalyticalGraphicsInc, us-gaap:TreasuryStock

Period End	2020-12-01
Value	0.9
Percentage of StockIssuedDuringPeriodValueAcquisitions	0.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

Period End	2021-06-30	2021-03-31	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	39	-39.037	37	-21.772	37	36	1.018	31	33	3.705
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	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	2021-06-30	2021-03-31	2020-06-30	2020-03-31
Value	34	-87.602	24	-70.769
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	86.7	224.4	67.0	325.0

us-gaap:TreasuryStock

Period End	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	5.327	48	9.956	12	48	11	22	43	18	29	43
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation	13.3	-124.4	0.0	33.0	-225.0	30.5	60.1	4271.4	58.2	88.4	1178.1

us-gaap:StockholdersEquityOther

Period End	2021-03-31	2020-09-30	2020-06-30	2020-03-31
Value	-39.037	47	37	-21.772
Percentage of StockholdersEquityOther	100.0	100.0	100.0	100.0

us-gaap:StockholdersEquityOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31
Value	-87.602	37	24	-70.769	25	14	-42.465	13	3.91	-39.943
Percentage of StockholdersEquityOther	224.4	79.2	67.0	325.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2013-12-31	2013-09-30	2012-12-31	2012-09-30	2011-12-31	2011-09-30
Value	0	0	0	233.48	0	0	-0.01	179.42	-3.02	7.03	0	157.11	10.55	0	11.3	100.35	0.79	4.27	0.47	85.37	1.24	3.5	0.04	83.38	2.67	1.56	3.38	0	2.059	0.001	-0.0011169	0.0011169
Percentage of TreasuryStockAcquiredAverageCostPerShare	0.0	0.0	0.0	100.0	0.0	0.0	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	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

us-gaap:TreasuryStockSharesAcquired

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2013-12-31	2013-09-30	2012-12-31	2012-09-30	2011-12-31	2011-09-30	2011-06-30
Value	0	0	0	690000.0	0	0	80000.0	250000.0	500000.0	424000.0	0	750000.0	750000.0	0	1000000.0	1000000.0	1000000.0	1200000.0	1000000.0	500000.0	1040100.0	1250000.0	35911.0	1507000.0	1545400.0	461300.0	500000.0	0	500000.0	0	0	0	0
Percentage of TreasuryStockSharesAcquired	0.0	0.0	0.0	100.0	0.0	0.0	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	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	0.0	0.0	0.0	0.0

us-gaap:TreasuryStockValueAcquiredCostMethod

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	0.0	0.0	0.0	161	0.0	0.0	14	44	77	74	0.0	117
Percentage of TreasuryStockValueAcquiredCostMethod	0.0	0.0	0.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	0.0	100.0

us-gaap:ValuationAllowancesAndReservesDeductions us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesDeductions

us-gaap:AllowanceForCreditLoss

Period End	2020-12-31
Value	39000.0
Percentage of ValuationAllowancesAndReservesDeductions	100.0

us-gaap:VariableLeaseCost

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	904000.0	1282000.0	1713000.0	1033000.0	1224000.0	1097000.0	907000.0	1126000.0	924000.0	797000.0
Percentage of VariableLeaseCost	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:DeferredTaxAssetsOperatingLeaseLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31
Value	34	26	0.0
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities	100.0	100.0	0.0

anss:DeferredTaxAssetsUncertainTaxPositions

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	18	19	17	15	11	10	8.545	7.977	7.79	3.145	3.084
Percentage of DeferredTaxAssetsUncertainTaxPositions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:DeferredTaxLiabilitiesOperatingLeaseRightofUseAssets

Period End	2020-12-31	2019-12-31	2018-12-31
Value	33	25	0.0
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightofUseAssets	100.0	100.0	0.0

anss:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

Period End	2021-06-30	2021-03-31	2020-09-30
Value	50	49	58
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	100.0	100.0	100.0

anss:PercentOfCashAndCashEquivalents us-gaap:CashAndCashEquivalents

anss:PercentOfCashAndCashEquivalents

us-gaap:Cash

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	58.1	55.6	62.6	63.5	0.697	0.835	0.63	0.589	0.604	0.426
Percentage of PercentOfCashAndCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:MoneyMarketFunds

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	41.9	44.4	37.4	36.5	0.303	0.165	0.37	0.411	0.396	0.574
Percentage of PercentOfCashAndCashEquivalents	72.1	79.9	59.7	57.5	43.5	19.8	58.7	69.8	65.6	134.7

anss:ShareBasedCompensationArrangementByShareBasedPaymentAwardEligibilityOwnershipPercentage us-gaap:Range, us-gaap:AwardType, us-gaap:PlanName

anss:ShareBasedCompensationArrangementByShareBasedPaymentAwardEligibilityOwnershipPercentage

srt:Maximum, us-gaap:EmployeeStock, anss:Ansys1996EmployeeStockPurchasePlan

Period End	2020-12-31
Value	5.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEligibilityOwnershipPercentage	100.0

anss:SharebasedCompensationArrangementbySharebasedPaymentAwardSharesIssuedasofDate us-gaap:AwardType, us-gaap:PlanName

anss:SharebasedCompensationArrangementbySharebasedPaymentAwardSharesIssuedasofDate

us-gaap:EmployeeStock, anss:Ansys1996EmployeeStockPurchasePlan

Period End	2020-12-31
Value	1700000.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardSharesIssuedasofDate	100.0

dei:EntityCommonStockSharesOutstanding

Period End	2021-07-31	2021-04-30	2021-02-17	2020-10-31	2020-07-31
Value	87	87	86	85	85
Percentage of EntityCommonStockSharesOutstanding	100.0	100.0	100.0	100.0	100.0

us-gaap:AccruedBonusesCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	51	24	112	52	37	22	101	55	42	20	79	46	32	23	69	40	27	21	49	30	23	17	46	32	21	16	47	32	27	17	43	30	23	15	42	31	24	16	36	30	22	14	29	23
Percentage of AccruedBonusesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:AccruedVacationCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-06-30	2018-12-31	2018-06-30	2017-12-31
Value	41	39	34	32	34	27	24	26	20	22	17
Percentage of AccruedVacationCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

Period End	2020-12-31	2019-12-31
Value	14	8.7
Percentage of AllowanceForDoubtfulAccountsReceivable	100.0	100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2009-12-31
Value	14	14	14	13	13	11	8.7	8.7	9.0	8.6	8.0	8.1	7.3	6.8	6.8	6.8	6.7	6.7	5.7	5.3	5.1	5.2	5.2	5.4	5.2	5.0	5.5	5.4	5.5	5.6	5.7	5.4	5.1	4.8	4.8	4.05	4.05	4.0	4.101	4.4	4.4	4.4	4.503	4.418
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	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	100.0
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired	100.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

Period End	2021-03-31	2020-12-31	2019-12-31	2019-09-30	2019-06-30
Value	6.2	593	841	218	208
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	526
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	79	93	69	69
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	0.0	11.1	31.9	33.5

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01
Value	29	28	16	16	16
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	17
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	4.32	6.231	2.842	2.842
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	0.0	21.9	17.2	17.2

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01
Value	33	38	15	15	12
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	29
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	2.854	10	8.653	8.653
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	0.0	28.1	55.2	55.2

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2019-02-01	2018-05-02	2018-03-31
Value	6.872	6.88	3.266	3.266	2.349	2.349	2.47	0.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	5.467
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	0.746	1.889	1.84	1.84
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue	0.0	27.5	56.3	56.3

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01
Value	24	16	11	10	9.653
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	23
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	2.834	6.425	4.704	4.715
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	0.0	38.1	42.4	43.4

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30
Value	57	65	14	14
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	50
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	7.311	8.294	5.049	5.049
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities	0.0	12.6	34.0	34.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

Period End	2021-03-31
Value	5.6
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

anss:AnalyticalGraphicsInc, us-gaap:ComputerSoftwareIntangibleAsset

Period End	2020-12-01
Value	184
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0

anss:AnalyticalGraphicsInc, us-gaap:CustomerRelatedIntangibleAssets

Period End	2020-12-01
Value	25
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0

anss:AnalyticalGraphicsInc, us-gaap:TradeNames

Period End	2020-12-01
Value	18
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions, us-gaap:ComputerSoftwareIntangibleAsset

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	32	25	17	17
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0	0.0	0.0	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions, us-gaap:CustomerRelatedIntangibleAssets

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	2.3	15	14	14
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0	0.0	0.0	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions, us-gaap:TradeNames

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	1.0	2.051	1.381	1.381
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0	0.0	0.0	0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ComputerSoftwareIntangibleAsset

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01	2018-05-02
Value	215	225	50	50	41	47
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:CustomerRelatedIntangibleAssets

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01	2018-05-02
Value	27	61	34	34	31	41
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:TradeNames

Period End	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01	2018-05-02
Value	19	17	5.96	5.96	5.469	10
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet

Period End	2021-03-31	2020-12-31	2019-12-31	2019-09-30	2019-06-30	2019-02-01
Value	1.0	236	280	93	93	80
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

anss:AnalyticalGraphicsInc

Period End	2020-12-01
Value	195
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	0.0

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions

Period End	2021-06-30	2019-12-31	2019-09-30	2019-06-30
Value	31	42	33	33
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	0.0	15.3	35.6	35.5

us-gaap:CashAndCashEquivalentsFairValueDisclosure

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2013-12-31
Value	401	438	341	307	225	118	322	301	250	227	446	397	390	324	312	391	370	354	333	334	354	342	356	353	408	339	281	368	303
Percentage of CashAndCashEquivalentsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2013-12-31
Value	401	438	341	307	225	118	322	301	250	227	446	397	390	324	312	391	370	354	333	334	354	342	356	353	408	339	281	368	303
Percentage of CashAndCashEquivalentsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:CashUninsuredAmount us-gaap:ConcentrationRiskByType

us-gaap:CashUninsuredAmount

us-gaap:CreditConcentrationRisk

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31
Value	887	855	754	852	805	763	747	717
Percentage of CashUninsuredAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerAssetNetCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	113	135	192	145	112	141	177	101	119	167
Percentage of ContractWithCustomerAssetNetCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ContractWithCustomerLiability

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31
Value	351	380	388	338	336	365	365	303	335	344	343	286	323	329	299
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	100.0	100.0	100.0

us-gaap:DebtInstrumentFaceAmount

Period End	2020-12-31
Value	800
Percentage of DebtInstrumentFaceAmount	100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-06-30	2020-03-31	2019-12-31
Value	1700000.0	1800000.0	1900000.0	1300000.0	1400000.0	1500000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeTaxAssetsNet

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	22	22	28	25	24	22	24	27	24	26
Percentage of DeferredIncomeTaxAssetsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeTaxLiabilities

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	224	163	84	32	59	77	97	110	136	148
Percentage of DeferredIncomeTaxLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	47	35	19	21	32	40	42	26	26	18	12
Percentage of DeferredTaxAssetsOperatingLossCarryforwards	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

Period End	2020-12-31
Value	1900000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	100.0

us-gaap:DeferredTaxAssetsOther

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	6856000.0	6309000.0	2505000.0	2003000.0	3163000.0	3240000.0	2892000.0	1953000.0	2227000.0	1241000.0	588000.0
Percentage of DeferredTaxAssetsOther	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	9847000.0	5865000.0	5951000.0	3699000.0	3889000.0	3562000.0	4349000.0	2331000.0	2254000.0	4542000.0	1429000.0
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	13	9.392	15	8.603	17	17	20	18	17	16	14
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	24	24	20	17	23	23	23	20	16	11	8.916
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	3193000.0	1841000.0	1616000.0	1462000.0	2078000.0	1888000.0	1806000.0	2014000.0	1661000.0	1259000.0	1587000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	147	99	38	29	56	73	92	106	128	141	108
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesOther

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	10	21	31	0.0
Percentage of DeferredTaxLiabilitiesOther	100.0	100.0	100.0	0.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	6052000.0	3780000.0	2034000.0	1557000.0	2994000.0	3426000.0	4652000.0	4556000.0	5838000.0	6529000.0	3430000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	26	13	12	0.0
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome	100.0	100.0	100.0	0.0

us-gaap:DefinedBenefitPlanBenefitObligation

Period End	2020-12-31	2019-12-31
Value	13	11
Percentage of DefinedBenefitPlanBenefitObligation	100.0	100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

Period End	2020-12-31
Value	160
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	100.0

us-gaap:FairValueConcentrationOfRiskCashAndCashEquivalents us-gaap:ConcentrationRiskByType

us-gaap:FairValueConcentrationOfRiskCashAndCashEquivalents

us-gaap:CreditConcentrationRisk

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31
Value	396	330	452	328	377	440	350	378
Percentage of FairValueConcentrationOfRiskCashAndCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	664	644	628	615	598	595	582	569	562	553	546	538	530	520	506	493	480	467	453	444	431	418	403	452	438	422	411	413	404	388	373	360	343	329	317	302	284	267	251	238	226	201
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	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:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ComputerSoftwareIntangibleAsset

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	396	382	370	359	349	340	332	325	322	318	314	311	308	303	297	291	286	280	275	269	263	257	251	245	239	232	227	221	216	209	203	196	189	182	175	-168.563	160	152	144	137	131	120
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization	59.7	59.4	58.9	58.4	58.4	57.3	57.1	57.2	57.3	57.5	57.6	57.9	58.1	58.3	58.8	59.2	59.6	60.0	60.6	60.6	61.0	61.6	62.2	54.2	54.6	55.0	55.2	53.5	53.4	54.0	54.4	54.6	55.2	55.5	55.5	-55.7	56.4	57.1	57.5	57.7	58.1	59.8

us-gaap:CustomerRelatedIntangibleAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2013-12-31
Value	142	137	136	135	129	136	132	127	125	120	117	113	110	109	104	100	96	92	88	88	84	80	76	133	129	123	121	132	119
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization	21.4	21.4	21.6	22.0	21.6	22.9	22.8	22.4	22.2	21.8	21.5	21.1	20.9	21.0	20.6	20.3	20.1	19.9	19.5	19.9	19.6	19.3	18.9	29.6	29.5	29.3	29.5	32.0	32.0

us-gaap:TradeNames

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2011-12-31
Value	125	123	122	120	119	118	117	116	115	114	113	112	111	107	104	101	97	93	90	86	83	79	76	73	69	66	63	60	57	54	50	48	45	43	40	-37.926	35	30
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization	18.9	19.2	19.5	19.6	20.0	19.9	20.1	20.4	20.5	20.7	20.8	21.0	21.0	20.7	20.6	20.5	20.3	20.1	19.9	19.5	19.3	19.1	18.9	16.2	15.9	15.7	15.3	14.5	14.1	13.9	13.6	13.4	13.3	13.1	12.8	-12.5	12.5	12.1

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

Period End	2020-12-31
Value	311
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	78	77	74	55
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

Period End	2021-06-30	2021-03-31	2020-09-30
Value	36	55	13
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive

Period End	2021-06-30	2021-03-31	2020-09-30
Value	259	241	184
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	75	72	74	51
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	77	74	77	55
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	80	77	78	56
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	80	78	77	56
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsGross

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	1353	1321	1323	1089	1079	1053	1058	836	844	831	756	757	759	666	663	648	633	631	626	629	628	627	624	685	670	666	656	677	688	660	640	641	637	636	643	646	610	611	613	614	483	479
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	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:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ComputerSoftwareIntangibleAsset

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	890	862	859	670	665	632	635	455	459	450	410	411	411	365	365	355	342	341	338	336	336	336	336	339	324	322	321	322	323	308	300	300	299	297	298	298	287	287	287	286	205	205
Percentage of FiniteLivedIntangibleAssetsGross	65.8	65.3	65.0	61.5	61.7	60.1	60.0	54.5	54.4	54.2	54.3	54.3	54.2	54.9	55.1	54.8	54.0	54.1	54.1	53.5	53.6	53.7	53.9	49.6	48.5	48.3	48.9	47.6	47.1	46.7	46.9	46.8	47.0	46.8	46.5	46.2	47.1	47.1	46.9	46.6	42.6	42.8

us-gaap:CustomerRelatedIntangibleAssets

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2013-12-31
Value	286	283	288	262	258	266	269	238	242	238	209	209	210	173	171	164	163	161	159	164	163	162	159	217	217	216	221	240	237
Percentage of FiniteLivedIntangibleAssetsGross	21.2	21.5	21.8	24.1	23.9	25.3	25.5	28.5	28.7	28.7	27.6	27.6	27.7	26.0	25.8	25.4	25.8	25.6	25.5	26.2	26.1	25.9	25.6	31.7	32.4	32.4	33.7	35.5	37.0

us-gaap:TradeNames

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2011-12-31
Value	176	175	175	156	155	153	154	142	142	142	137	137	137	127	127	128	128	128	127	127	127	127	127	127	128	127	114	114	114	113	102	102	102	102	102	102	102	102
Percentage of FiniteLivedIntangibleAssetsGross	13.0	13.3	13.3	14.4	14.4	14.6	14.6	17.0	16.9	17.1	18.1	18.1	18.1	19.1	19.2	19.8	20.2	20.3	20.4	20.3	20.4	20.4	20.5	18.7	19.1	19.2	17.4	16.9	16.7	17.2	16.0	16.0	16.1	16.1	16.0	15.9	16.8	16.7

us-gaap:IncomeTaxesReceivable

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	45	59	31	53	47	46	26	32	38	13
Percentage of IncomeTaxesReceivable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InvestmentsFairValueDisclosure

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	504000.0	516000.0	479000.0	468000.0	433000.0	282000.0	288000.0	218000.0	241000.0	237000.0	225000.0	211000.0	269000.0	4275000.0	286000.0	7064000.0	5486000.0	368000.0	381000.0	356000.0	410000.0	442000.0	446000.0	684000.0	816000.0	789000.0	714000.0	665000.0	644000.0	559000.0	500000.0	440000.0	461000.0	488000.0	452000.0	454000.0	468000.0	599000.0	576000.0	582000.0	548000.0	455000.0
Percentage of InvestmentsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:InvestmentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	504000.0	516000.0	479000.0	468000.0	433000.0	282000.0	288000.0	218000.0	241000.0	237000.0	225000.0	211000.0	269000.0	4275000.0	286000.0	7064000.0	5486000.0	368000.0	381000.0	356000.0	410000.0	442000.0	446000.0	684000.0	816000.0	789000.0	714000.0	665000.0	644000.0	559000.0	500000.0	440000.0	461000.0	488000.0	452000.0	454000.0	468000.0	599000.0	576000.0	582000.0	548000.0	455000.0
Percentage of InvestmentsFairValueDisclosure	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30
Value	25	24	27	23
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	100.0	100.0	100.0	100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

Period End	2021-06-30	2021-03-31	2020-09-30
Value	14	20	6.467
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	100.0	100.0	100.0

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2018-12-31
Value	69	67	66	64	33	29
Percentage of LiabilityForUncertainTaxPositionsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

Period End	2020-12-31
Value	743
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

Period End	2020-12-31
Value	37
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

Period End	2020-12-31
Value	18
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	100.0

us-gaap:LongtermDebtWeightedAverageInterestRate

Period End	2021-06-30	2021-03-31
Value	1.4	1.45
Percentage of LongtermDebtWeightedAverageInterestRate	100.0	100.0

us-gaap:LossContingencyEstimateOfPossibleLoss us-gaap:LossContingenciesByNatureOfContingency

us-gaap:LossContingencyEstimateOfPossibleLoss

anss:IndiaServiceTaxAudit

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2017-03-31	2016-09-30	2016-06-30
Value	7300000.0	7400000.0	7300000.0	7200000.0	7100000.0	6600000.0	6600000.0
Percentage of LossContingencyEstimateOfPossibleLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:MoneyMarketFundsAtCarryingValue

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2010-12-31
Value	401	438	341	307	225	118	322	301	250	227	446	397	390	324	312	391	370	354	333	334	354	342	356	353	408	339	281	368	340	384	303	306	267	254	206	270	262	274	181	160	371	273
Percentage of MoneyMarketFundsAtCarryingValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:OperatingLeaseWeightedAverageDiscountRatePercent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31
Value	3.0	3.1	2.9	3.3	0.033	0.034	3.7	3.7	0.033	0.033
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLossCarryforwards anss:OperatingLossCarryforwards, us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

anss:OperatingLossCarryForwardWithNoExpirationDate, us-gaap:DomesticCountry

Period End	2020-12-31
Value	25
Percentage of OperatingLossCarryforwards	100.0

anss:OperatingLossCarryForwardWithNoExpirationDate, us-gaap:ForeignCountry

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	141	113	46	29	28	29	29	19	20	6.6
Percentage of OperatingLossCarryforwards	553.5	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

anss:SubjectToExpiration, us-gaap:DomesticCountry

Period End	2020-12-31
Value	2.7
Percentage of OperatingLossCarryforwards	10.5

anss:SubjectToExpiration, us-gaap:ForeignCountry

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	24	28	27	36	48
Percentage of OperatingLossCarryforwards	95.3	0.0	0.0	0.0	0.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	28	4.2	5.6	16	28	40	45	4.6	4.6	3.2
Percentage of OperatingLossCarryforwards	110.5	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ForeignCountry

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	166	142	73	66	76	84	81	70	70	48
Percentage of OperatingLossCarryforwards	648.8	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:OtherEmployeeRelatedLiabilitiesCurrent

Period End	2021-03-31	2020-12-31	2020-03-31	2019-12-31
Value	41	20	32	15
Percentage of OtherEmployeeRelatedLiabilitiesCurrent	100.0	100.0	100.0	100.0

us-gaap:OtherLiabilitiesAndDeferredRevenueNoncurrent

Period End	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2018-12-31
Value	35	28	29	32	29	32
Percentage of OtherLiabilitiesAndDeferredRevenueNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:PrepaidExpenseCurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2018-12-31
Value	55	83	44	43	45	47	45	42	46	35
Percentage of PrepaidExpenseCurrent	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	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31
Value	597	607	606	570	552	564	569	445	496	477	659	544	586	595
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	100.0	100.0	100.0

us-gaap:SalesAndExciseTaxPayableCurrentAndNoncurrent

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31
Value	25	28	45	23	18	17	36	24
Percentage of SalesAndExciseTaxPayableCurrentAndNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31
Value	1.323	1.618	1.522	1.361	0.906	0.656
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

anss:DirectorRestrictedStockUnits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	8.071	9.688	13	18
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	610.1	598.8	895.7	1323.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31
Value	201.98	165.26	129.96	100.66	86.45	83.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

anss:DirectorRestrictedStockUnits

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	253.93	187.53	165.71	123.38
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	125.7	113.5	127.5	122.6

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate

us-gaap:EmployeeStock, anss:Ansys1996EmployeeStockPurchasePlan

Period End	2020-12-31
Value	10.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	65	65	132	189
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber us-gaap:AwardType

anss:DiversifiedDeferredStockAward

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	6.998	5.598	12	29
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	10.7	8.5	9.2	15.6

anss:UndiversifiedDeferredStockAward

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31
Value	58	60	120	159
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	89.3	91.5	90.8	84.4

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

Period End	2021-06-30	2019-12-31	2017-12-31	2016-12-31	2016-09-30	2016-06-30	2015-12-31	2014-12-31	2013-12-31	2012-12-31
Value	1.6	39	39	39	39	39	30	30	30	30
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	187	186	118	191	113	165	163	261	174	168	162	166
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	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:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	187	177	112	178	112	156	149	213	136	124	122	131
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	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:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	648000.0	924000.0	1347000.0	1930000.0	2762000.0	3539000.0	3958000.0	4351000.0	4094000.0	4251000.0	4214000.0	4914000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	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:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31	2009-12-31
Value	74.26	65.71	59.69	55.11	51.8	48.29	44.22	38.18	33.91	27.98	23.11	16.74
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	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:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions

anss:RangeFour

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	242000.0	256000.0	656000.0	849000.0	446000.0	1077000.0	1178000.0	1164000.0	1139000.0	1208000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:RangeOne

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	13000.0	181000.0	458000.0	437000.0	874000.0	1030000.0	1022000.0	1747000.0	1530000.0	1521000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	5.4	70.7	69.8	51.5	196.0	95.6	86.8	150.1	134.3	125.9

anss:RangeThree

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	226000.0	280000.0	11000.0	492000.0	641000.0	802000.0	1703000.0	1983000.0	1962000.0	1896000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	93.4	109.4	1.7	58.0	143.7	74.5	144.6	170.4	172.3	157.0

anss:RangeTwo

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	167000.0	267000.0	359000.0	392000.0	1175000.0	1077000.0	1029000.0	1272000.0	1425000.0	1810000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	69.0	104.3	54.7	46.2	263.5	100.0	87.4	109.3	125.1	149.8

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

anss:RangeFour

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	94.15	93.89	79.5	78.06	90.11	71.55	70.37	68.8	58.69	48.22
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

anss:RangeOne

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	22.1	43.29	42.12	32.01	34.25	29.68	24.51	22.4	19.71	13.18
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	23.5	46.1	53.0	41.0	38.0	41.5	34.8	32.6	33.6	27.3

anss:RangeThree

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	67.44	67.44	63.75	58.67	67.38	58.68	53.92	53.73	45.13	39.38
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	71.6	71.8	80.2	75.2	74.8	82.0	76.6	78.1	76.9	81.7

anss:RangeTwo

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31
Value	58.67	58.67	58.67	49.11	54.02	45.39	39.6	39.54	33.36	25.93
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	62.3	62.5	73.8	62.9	59.9	63.4	56.3	57.5	56.8	53.8

us-gaap:SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit

Period End	2020-12-31
Value	5000000.0
Percentage of SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	100.0

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2014-09-30	2014-02-28
Value	2800000.0	2800000.0	2800000.0	2800000.0	1568500.0	1500000.0
Percentage of StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TaxCreditCarryforwardAmount

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	11	4.1	4.3	4.6	5.2	4.7	6.0
Percentage of TaxCreditCarryforwardAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:TaxCreditCarryforward

anss:NotSubjectToExpiration

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	0.7	0.6	0.6	0.6	0.9	0.7	2.0
Percentage of TaxCreditCarryforwardAmount	6.2	14.6	14.0	13.0	17.3	14.9	33.3

anss:SubjectToExpiration

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31
Value	10	3.5	3.7	4.0	4.3	4.0	4.0
Percentage of TaxCreditCarryforwardAmount	93.8	85.4	86.0	87.0	82.7	85.1	66.7

anss:SubjectToUtilizationLimitations

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31
Value	6.9	1.2	2.2	2.3	3.0
Percentage of TaxCreditCarryforwardAmount	61.6	29.3	51.2	50.0	57.7

us-gaap:TradingSecurities

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31
Value	1602000.0	1601000.0	1602000.0	1602000.0	1114000.0	1113000.0	1110000.0	4193000.0	3107000.0	2138000.0	1646000.0	1840000.0	1379000.0	4353000.0	3742000.0	2256000.0	2214000.0	994000.0	459000.0
Percentage of TradingSecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:TradingSecurities us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1

Period End	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31
Value	1602000.0	1601000.0	1602000.0	1602000.0	1114000.0	1113000.0	1110000.0	4193000.0	3107000.0	2138000.0	1646000.0	1840000.0	1379000.0	4353000.0	3742000.0	2256000.0	2214000.0	994000.0	459000.0
Percentage of TradingSecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	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:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	5.5	11	4.7	3.9	2.7	1.9	1.6	1.6	2.1	2.2	0.455
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

Period End	2020-12-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31	2014-12-31	2013-12-31	2012-12-31	2011-12-31	2010-12-31
Value	5400000.0	6600000.0	4000000.0	3600000.0	2800000.0	2700000.0	2700000.0	2700000.0	2500000.0	2600000.0	2000000.0
Percentage of UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Period End	2020-12-31
Value	16
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary

Period End	2020-12-31
Value	26000.0
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

Period End	2020-12-31
Value	44
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary

Period End	2020-12-31
Value	2525000.0
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary

Period End	2020-12-31
Value	20
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary

Period End	2020-12-31
Value	6758000.0
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

Period End	2020-12-31
Value	74
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	100.0

us-gaap:UnsecuredDebt

Period End	2021-03-31	2020-12-31	2020-06-30	2020-03-31	2019-12-31	2019-11-01
Value	798	798	423	423	498	500
Percentage of UnsecuredDebt	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForCreditLoss

Period End	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2018-12-31	2017-12-31	2016-12-31	2015-12-31
Value	14	13	13	11	8.7	8.0	6.8	5.7	5.2
Percentage of ValuationAllowancesAndReservesBalance	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Line plots across dimensions of each concept

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

COGS Ratio
us-gaap:ProductOrService
(None,)

TTM Greenblatt ROC
_
(None,)

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

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

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

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

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

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:CashAndCashEquivalents, us-gaap:ConcentrationRiskByType
(None, 'us-gaap:CreditConcentrationRisk')

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)

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

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

ANSS

Table of contents

Plots across concepts

Tables

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock

us-gaap:TreasuryStock

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:GeneralAndAdministrativeExpense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:Service

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:License

us-gaap:Service

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense

Revenues

us-gaap:Revenues

us-gaap:Revenues

us-gaap:Revenues us-gaap:ProductOrService

anss:LeaseLicenseRevenue