CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Noncontrolling Interests
BALANCE at Dec. 31, 2018	$ 0
Increase (Decrease) in Temporary Equity
Issuance of redeemable subsidiary preferred equity, net of issuance costs	985
Noncontrolling interests issued	380
Distributions to noncontrolling interests, net	(38)
Redemption of redeemable subsidiary preferred equity, net of fees	(297)
Net income (loss)	48
BALANCE at Dec. 31, 2019	1,078
BALANCE (in shares) at Dec. 31, 2018				68,897,723	25,670,684
BALANCE at Dec. 31, 2018	1,600			$ 1	$ 0	$ 1,121	$ 518	$ (1)	$ (39)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(73)						(73)
Class B Common Stock converted into Class A Common Stock (in shares)				943,002	(943,002)
Repurchase of Class A Common Stock (in shares)				(4,555,487)
Repurchases of Class A Common Stock	(145)					(145)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,544,872
Class A Common Stock issued pursuant to employee benefit plans	35					35
Noncontrolling interests acquired in a business combination	248								248
Distributions to noncontrolling interests, net	(27)								(27)
Other comprehensive income (loss)	(1)							(1)
Net income (loss)	57						47		10
BALANCE (in shares) at Dec. 31, 2019				66,830,110	24,727,682
BALANCE at Dec. 31, 2019	1,694			$ 1	$ 0	1,011	492	(2)	192
Increase (Decrease) in Temporary Equity
Noncontrolling interests issued	22
Distributions to noncontrolling interests, net	0
Distributions to redeemable noncontrolling interests	(419)
Redemption of redeemable subsidiary preferred equity, net of fees	(547)
Net income (loss)	56
BALANCE at Dec. 31, 2020	190
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(64)						(64)
Repurchase of Class A Common Stock (in shares)				(19,418,934)
Repurchases of Class A Common Stock	(343)					(343)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,841,495
Class A Common Stock issued pursuant to employee benefit plans	53					53
Distributions to noncontrolling interests, net	(32)								(32)
Other comprehensive income (loss)	(8)							(8)
Net income (loss)	(2,485)						(2,414)		(71)
BALANCE (in shares) at Dec. 31, 2020		49,252,671	24,727,682	49,252,671	24,727,682
BALANCE at Dec. 31, 2020	(1,185)			$ 1	$ 0	721	(1,986)	(10)	89
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests, net	(11)
Net income (loss)	18
BALANCE at Dec. 31, 2021	197
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(60)						(60)
Class B Common Stock converted into Class A Common Stock (in shares)				952,626	(952,626)
Repurchase of Class A Common Stock (in shares)				(2,438,585)
Repurchases of Class A Common Stock	(61)					(61)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,547,591
Class A Common Stock issued pursuant to employee benefit plans	31					31
Distributions to noncontrolling interests, net	(95)								(95)
Other comprehensive income (loss)	8							8
Net income (loss)	(344)						(414)		70
BALANCE (in shares) at Dec. 31, 2021		49,314,303	23,775,056	49,314,303	23,775,056
BALANCE at Dec. 31, 2021	$ (1,706)			$ 1	$ 0	$ 691	$ (2,460)	$ (2)	$ 64