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	Accumulated Deficit	Accumulated Other Comprehensive Loss	Noncontrolling Interests
BALANCE at Dec. 31, 2020	$ 190
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests, net	(9)
Net income attributable to the redeemable noncontrolling interests	9
BALANCE at Jun. 30, 2021	190
BALANCE (in shares) at Dec. 31, 2020				49,252,671	24,727,682
BALANCE at Dec. 31, 2020	(1,185)			$ 1	$ 0	$ 721	$ (1,986)	$ (10)	$ 89
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(30)						(30)
Class B Common Stock converted into Class A Common Stock (in shares)				(952,626)	(952,626)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,411,627
Class A Common Stock issued pursuant to employee benefit plans	19					19
Distributions to noncontrolling interests, net	(50)								(50)
Other comprehensive income (loss)	5							5
Net income (loss)	(311)						(344)		33
BALANCE (in shares) at Jun. 30, 2021				51,616,924	23,775,056
BALANCE at Jun. 30, 2021	(1,552)			$ 1	$ 0	740	(2,360)	(5)	72
BALANCE at Mar. 31, 2021	188
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests, net	(3)
Net income attributable to the redeemable noncontrolling interests	5
BALANCE at Jun. 30, 2021	190
BALANCE (in shares) at Mar. 31, 2021				51,118,350	24,217,682
BALANCE at Mar. 31, 2021	(1,186)			$ 1	$ 0	735	(2,013)	(2)	93
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(15)						(15)
Class B Common Stock converted into Class A Common Stock (in shares)				(442,626)	(442,626)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				55,948
Class A Common Stock issued pursuant to employee benefit plans	5					5
Distributions to noncontrolling interests, net	(20)								(20)
Other comprehensive income (loss)	(3)							(3)
Net income (loss)	(333)						(332)		(1)
BALANCE (in shares) at Jun. 30, 2021				51,616,924	23,775,056
BALANCE at Jun. 30, 2021	(1,552)			$ 1	$ 0	740	(2,360)	(5)	72
BALANCE at Dec. 31, 2021	197
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests, net	(3)
Deconsolidation of subsidiary	(16)
Net income attributable to the redeemable noncontrolling interests	9
BALANCE at Jun. 30, 2022	187
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
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	$ (37)						(37)
Repurchases of Class A Common Stock (in shares)	(4,058,319)
Repurchases of Class A Common Stock	$ (104)					(104)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,214,562
Class A Common Stock issued pursuant to employee benefit plans	41					41
Distributions to noncontrolling interests, net	(5)								(5)
Other comprehensive income (loss)	3							3
Deconsolidation of subsidiary	(151)							(3)	(148)
Net income (loss)	2,601						2,576		25
BALANCE (in shares) at Jun. 30, 2022		46,470,546	23,775,056	46,470,546	23,775,056
BALANCE at Jun. 30, 2022	642			$ 1	$ 0	628	79	(2)	(64)
BALANCE at Mar. 31, 2022	184
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests, net	(2)
Net income attributable to the redeemable noncontrolling interests	5
BALANCE at Jun. 30, 2022	187
BALANCE (in shares) at Mar. 31, 2022				47,934,815	23,775,056
BALANCE at Mar. 31, 2022	703			$ 1	$ 0	657	109	(2)	(62)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(19)						(19)
Repurchases of Class A Common Stock (in shares)				(1,585,834)
Repurchases of Class A Common Stock	(36)					(36)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				121,565
Class A Common Stock issued pursuant to employee benefit plans	7					7
Distributions to noncontrolling interests, net	(2)								(2)
Net income (loss)	(11)						(11)
BALANCE (in shares) at Jun. 30, 2022		46,470,546	23,775,056	46,470,546	23,775,056
BALANCE at Jun. 30, 2022	$ 642			$ 1	$ 0	$ 628	$ 79	$ (2)	$ (64)