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Stockholders' Equity - Schedule of Stockholders' Equity (Details) - USD ($) shares in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 2,280,061,000	$ 2,569,808,000	$ 2,804,151,000	$ 3,107,083,000	$ 2,327,906,000	$ 2,050,946,000	$ 2,804,151,000	$ 2,050,946,000
Total stockholders' equity	2,280,061,000	2,280,061,000	2,569,808,000	2,830,880,000	3,107,083,000	2,327,906,000	2,804,151,000	2,830,880,000
Non-cash stock compensation	3,672,000	4,621,000	1,984,000	1,578,000	4,854,000	3,149,000
Conversion of Class B shares to Class A shares			0	0	0	0
Purchase of treasury stock at cost			(29,203,000)	(104,849,000)
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding	(35,000)	(32,000)	25,614,000	1,455,000	170,000	(1,420,000)
Distributions to noncontrolling interest holders					(731,000)	(625,000)
Changes in noncontrolling interests	(2,610,000)	3,471,000			(3,700,000)
Reclassification of redeemable noncontrolling interests and equity	1,574,000	(414,000)	38,000	649,000	(855,000)	224,000
Net (loss) income	(784,430,000)	(311,628,000)	98,316,000	(96,794,000)	779,616,000	194,265,000	(997,742,000)	877,087,000
Foreign currency translation adjustment, net of tax of $0	326,342,000	14,034,000	(330,116,000)	(82,580,000)	10,188,000	49,551,000	10,260,000	(22,841,000)
Unrealized gain on derivatives, net of tax of $0	0			4,531,000	(10,559,000)	2,609,000	0	(3,419,000)
Minimum pension liability adjustment, net of tax of $0			932,000	4,531,000			932,000	0
Balance, end of period	1,824,580,000	2,280,061,000	2,569,808,000	2,830,880,000	3,107,083,000	2,327,906,000	1,824,580,000	2,830,880,000
Foreign currency translation adjustment, tax	0	0		0	0		0	0
Pension adjustment, tax	0						0	0
Adoption of accounting standards
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						28,944,000		28,944,000
Total stockholders' equity						28,944,000		28,944,000
Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						2,079,890,000		2,079,890,000
Total stockholders' equity						2,079,890,000		2,079,890,000
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	3,756,975,000	3,752,186,000	3,724,636,000	3,707,305,000	3,705,787,000	3,703,796,000	3,724,636,000	3,703,796,000
Total stockholders' equity	3,758,008,000	3,756,975,000	3,752,186,000	3,710,145,000	3,707,305,000	3,705,787,000	3,758,008,000	3,710,145,000
Non-cash stock compensation	3,672,000	4,621,000	1,984,000	1,578,000	4,854,000	3,149,000
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding	(35,000)	(33,000)	25,610,000	1,455,000	170,000	(1,421,000)
Changes in noncontrolling interests	(2,610,000)				(3,700,000)
Balance, end of period	3,758,008,000	3,756,975,000	3,752,186,000	3,710,145,000	3,707,305,000	3,705,787,000	3,758,008,000	3,710,145,000
Additional paid-in capital | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						3,703,796,000		3,703,796,000
Total stockholders' equity						3,703,796,000		3,703,796,000
(Accumulated deficit) retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	228,301,000	536,124,000	436,509,000	470,860,000	(310,732,000)	(530,919,000)	436,509,000	(530,919,000)
Total stockholders' equity	(556,141,000)	228,301,000	536,124,000	375,634,000	470,860,000	(310,732,000)	(556,141,000)	375,634,000
Net (loss) income	(784,442,000)	(307,823,000)	99,615,000	(95,226,000)	781,592,000	191,243,000
Balance, end of period	(556,141,000)	228,301,000	536,124,000	375,634,000	470,860,000	(310,732,000)	(556,141,000)	375,634,000
(Accumulated deficit) retained earnings | Adoption of accounting standards
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						28,944,000		28,944,000
Total stockholders' equity						28,944,000		28,944,000
(Accumulated deficit) retained earnings | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						(501,975,000)		(501,975,000)
Total stockholders' equity						(501,975,000)		(501,975,000)
Accumulated other comprehensive (loss) income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(1,391,686,000)	(1,405,788,000)	(1,073,981,000)	(1,060,849,000)	(1,060,565,000)	(1,112,695,000)	(1,073,981,000)	(1,112,695,000)
Total stockholders' equity	(1,065,270,000)	(1,391,686,000)	(1,405,788,000)	(1,138,388,000)	(1,060,849,000)	(1,060,565,000)	(1,065,270,000)	(1,138,388,000)
Foreign currency translation adjustment, net of tax of $0	326,416,000	14,102,000	(330,875,000)	(82,070,000)	10,275,000	49,521,000
Unrealized gain on derivatives, net of tax of $0					(10,559,000)	2,609,000
Minimum pension liability adjustment, net of tax of $0			932,000	4,531,000
Balance, end of period	(1,065,270,000)	(1,391,686,000)	(1,405,788,000)	(1,138,388,000)	(1,060,849,000)	(1,060,565,000)	(1,065,270,000)	(1,138,388,000)
Accumulated other comprehensive (loss) income | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						(1,112,695,000)		(1,112,695,000)
Total stockholders' equity						(1,112,695,000)		(1,112,695,000)
Treasury stock at cost
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(300,309,000)	(300,309,000)	(271,106,000)				(271,106,000)
Total stockholders' equity	(300,309,000)	(300,309,000)	(300,309,000)	(104,849,000)			(300,309,000)	(104,849,000)
Purchase of treasury stock at cost			(29,203,000)	(104,849,000)
Balance, end of period	(300,309,000)	(300,309,000)	(300,309,000)	(104,849,000)			(300,309,000)	(104,849,000)
Non-controlling interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(14,130,000)	(13,314,000)	(12,812,000)	(11,131,000)	(7,482,000)	(10,133,000)	(12,812,000)	(10,133,000)
Total stockholders' equity	(12,618,000)	(14,130,000)	(13,314,000)	(12,560,000)	(11,131,000)	(7,482,000)	(12,618,000)	(12,560,000)
Distributions to noncontrolling interest holders					(731,000)	(625,000)
Changes in noncontrolling interests		3,471,000
Reclassification of redeemable noncontrolling interests and equity	1,574,000	(414,000)	38,000	649,000	(855,000)	224,000
Net (loss) income	12,000	(3,805,000)	(1,299,000)	(1,568,000)	(1,976,000)	3,022,000
Foreign currency translation adjustment, net of tax of $0	(74,000)	(68,000)	759,000	(510,000)	(87,000)	30,000
Balance, end of period	$ (12,618,000)	$ (14,130,000)	$ (13,314,000)	$ (12,560,000)	$ (11,131,000)	(7,482,000)	$ (12,618,000)	(12,560,000)
Non-controlling interests | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						(10,133,000)		(10,133,000)
Total stockholders' equity						$ (10,133,000)		$ (10,133,000)
Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			119,575				119,575
Balance of shares outstanding, end of period (in shares)	119,270						119,270
Class A Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	119,207	119,075	119,575	118,806	107,783	107,450	119,575	107,450
Balance, beginning of period	$ 547,000	$ 546,000	$ 542,000	$ 475,000	$ 431,000	$ 430,000	$ 542,000	$ 430,000
Total stockholders' equity	$ 547,000	$ 547,000	$ 546,000	$ 535,000	$ 475,000	$ 431,000	$ 547,000	$ 535,000
Conversion of Class B shares to Class A shares (in shares)			18	15,002	10,991	8
Conversion of Class B shares to Class A shares				$ 60,000	$ 44,000
Purchases of treasury stock at cost (in shares)			(1,619)	(6,150)
Vesting of restricted stock, net of shares withheld to satisfy tax withholding (in shares)	63	132	1,101	96	32	325
Exercise of stock options and vesting of restricted stock, net of shares withheld to satisfy tax withholding	$ 0	$ 1,000	$ 4,000			$ 1,000
Balance of shares outstanding, end of period (in shares)	119,270	119,207	119,075	127,754	118,806	107,783	119,270	127,754
Balance, end of period	$ 547,000	$ 547,000	$ 546,000	$ 535,000	$ 475,000	$ 431,000	$ 547,000	$ 535,000
Class A Common Stock | Common Stock | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						430,000		430,000
Total stockholders' equity						$ 430,000		$ 430,000
Class B Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)			90,831				90,831
Balance of shares outstanding, end of period (in shares)	90,813						90,813
Class B Common Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance of shares outstanding, beginning of period (in shares)	90,813	90,813	90,831	105,866	116,857	116,865	90,831	116,865
Balance, beginning of period	$ 363,000	$ 363,000	$ 363,000	$ 423,000	$ 467,000	$ 467,000	$ 363,000	$ 467,000
Total stockholders' equity	$ 363,000	$ 363,000	$ 363,000	$ 363,000	$ 423,000	$ 467,000	$ 363,000	$ 363,000
Conversion of Class B shares to Class A shares (in shares)			(18)	(15,002)	(10,991)	(8)
Conversion of Class B shares to Class A shares				$ (60,000)	$ (44,000)
Balance of shares outstanding, end of period (in shares)	90,813	90,813	90,813	90,864	105,866	116,857	90,813	90,864
Balance, end of period	$ 363,000	$ 363,000	$ 363,000	$ 363,000	$ 423,000	$ 467,000	$ 363,000	$ 363,000
Class B Common Stock | Common Stock | Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period						467,000		467,000
Total stockholders' equity						467,000		$ 467,000
Redeemable noncontrolling interests and equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interests and equity	6,000	201,000	(44,000)	(193,000)	194,000	263,000
Redeemable noncontrolling interests and equity | Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of redeemable noncontrolling interests and equity	$ 6,000	$ 201,000	$ (44,000)	$ (193,000)	$ 194,000	$ 263,000

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Data Type:	na
Balance Type:
Period Type: