Consolidated Statements Of Changes In Equity - USD ($) shares in Thousands, $ in Thousands	Total	Total Equity [Member]	Total Shareholders' Equity [Member]	Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member] Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Redeemable Noncontrolling Interests [Member]
Balance at Dec. 31, 2019		$ 11,078,416	$ 11,070,867	$ 0	$ 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
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 stock, shares						2
Repurchase of common stock		(23,865)	(23,865)	0	$ 0		(23,865)	0	0	0
Repurchase of common stock, shares					(21)
Restricted stock units expensed		19,369	19,369	0	$ 19,369		0	0	0	0
Adjustment of redeemable noncontrolling interests		16,013	16,013	0	0		16,013	0	0	(16,013)
Purchase of noncontrolling interest		(4,833)	(4,833)	0	(4,833)		0	0	0	(5,252)
Other		565	(187)	0	73		(260)	0	752	(1,842)
Balance at Mar. 31, 2020		9,732,330	9,720,728	0	$ 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
Balance at Dec. 31, 2020	12,814,681	12,814,681	12,799,789	591,891	$ 3,428,340		8,195,182	584,376	14,892
Balance, shares at Dec. 31, 2020					13,783
Balance, redeemable noncontrolling interests at Dec. 31, 2020	245,642									245,642
Net Income (Loss)	579,681	580,369	573,694				573,694	0	6,675	(688)
Total other comprehensive income (loss)	(214,680)	(214,697)	(214,697)				0	(214,697)	0	17
Comprehensive Income (Loss)	365,001	365,672	358,997						6,675	(671)
Issuance of stock, shares						1
Repurchase of common stock		(22,023)	(22,023)	0	$ 0		(22,023)	0	0	0
Repurchase of common stock, shares					(19)
Restricted stock units expensed		19,160	19,160	0	$ 19,160		0	0	0	0
Adjustment of redeemable noncontrolling interests		7,906	7,906	0	0		7,906	0	0	(7,906)
Purchase of noncontrolling interest		(531)	(531)	0	(531)		0	0	0	(147)
Other		299	646	0	645		1	0	(347)	(2,264)
Balance at Mar. 31, 2021	13,185,164	$ 13,185,164	$ 13,163,944	$ 591,891	$ 3,447,614		$ 8,754,760	$ 369,679	$ 21,220
Balance, shares at Mar. 31, 2021					13,765
Balance, redeemable noncontrolling interests at Mar. 31, 2021	$ 234,654									$ 234,654