Consolidated Statements Of Changes In Equity - USD ($) shares in Thousands, $ in Thousands	Total	Total Equity [Member]	Total Shareholders' Equity [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Redeemable Noncontrolling Interests [Member]
Balance at Dec. 31, 2018		$ 9,100,302	$ 9,080,653	$ 3,392,993	$ 5,782,310	$ (94,650)	$ 19,649
Balance, shares at Dec. 31, 2018				13,888
Balance, redeemable noncontrolling interests at Dec. 31, 2018								$ 174,062
Net Income (Loss)	$ 577,513	577,185	576,427		576,427	0	758	328
Total other comprehensive income (loss)	155,823	155,818	155,818		0	155,818	0	5
Comprehensive Income (Loss)	733,336	733,003	732,245				758	333
Issuance of common stock		0	0	$ 0	0	0	0	0
Issuance of common stock, shares				5
Repurchase of common stock		(37,649)	(37,649)	$ 0	(37,649)	0	0	0
Repurchase of common stock, shares				(37)
Restricted stock units expensed		6,848	6,848	$ 6,848	0	0	0	0
Restricted stock units expensed, shares				0
Adjustment of redeemable noncontrolling interests		18,361	18,361	$ 0	18,361	0	0	(18,361)
Adjustment of redeemable noncontrolling interests, shares				0
Purchase of noncontrolling interest		(3,736)	(3,736)	$ (3,736)	0	0	0	(5,025)
Purchase of noncontrolling interest, shares				0
Other		1,217	(740)	$ (165)	(575)	0	1,957	(3,007)
Other, shares				0
Balance at Mar. 31, 2019		9,818,346	9,795,982	$ 3,395,940	6,338,874	61,168	22,364
Balance, shares at Mar. 31, 2019				13,856
Balance, redeemable noncontrolling interests at Mar. 31, 2019								148,002
Balance at Dec. 31, 2019	11,078,416	11,078,416	11,070,867	$ 3,404,919	7,457,176	208,772	7,549
Balance, shares at Dec. 31, 2019				13,794
Balance, redeemable noncontrolling interests at Dec. 31, 2019	177,562							177,562
Net Income (Loss)	(1,401,376)	(1,402,462)	(1,405,763)		(1,405,763)	0	3,301	1,086
Total other comprehensive income (loss)	52,830	52,954	52,954		0	52,954	0	(124)
Comprehensive Income (Loss)	(1,348,546)	(1,349,508)	(1,352,809)				3,301	962
Issuance of common stock		57	57	$ 57	0	0	0	0
Issuance of common stock, shares				2
Repurchase of common stock		(23,865)	(23,865)	$ 0	(23,865)	0	0	0
Repurchase of common stock, shares				(21)
Restricted stock units expensed		19,369	19,369	$ 19,369	0	0	0	0
Restricted stock units expensed, shares				0
Adjustment of redeemable noncontrolling interests		16,013	16,013	$ 0	16,013	0	0	(16,013)
Adjustment of redeemable noncontrolling interests, shares				0
Purchase of noncontrolling interest		(4,833)	(4,833)	$ (4,833)	0	0	0	(5,252)
Purchase of noncontrolling interest, shares				0
Other		508	(244)	$ 16	(260)	0	752	(1,842)
Other, shares				0
Balance at Mar. 31, 2020	9,732,330	$ 9,732,330	$ 9,720,728	$ 3,419,528	$ 6,039,474	$ 261,726	$ 11,602
Balance, shares at Mar. 31, 2020				13,775
Balance, redeemable noncontrolling interests at Mar. 31, 2020	$ 155,417							$ 155,417