Income Taxes - Schedule of Reconciliation between the Statutory Federal Income Tax Rate and the Effective Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Differences between the statutory federal income tax rate and the effective tax rate
Provision for (benefit from) income taxes at statutory federal rate, Amount	$ 105	$ 89	$ (90)
State income taxes, net of federal income tax benefit, Amount	44	(15)	(104)
Net income attributable to noncontrolling interests, Amount	(29)	(20)	(18)
Change in valuation allowance, Amount	33	(267)	340
Nondeductible goodwill, Amount		41	11
Amended return adjustments, Amount	(22)
Nondeductible loss on divestiture, Amount		(15)	15
Other, Amount		2	6
Total provision for (benefit from) income taxes for income (loss)	$ 131	$ (185)	$ 160
Provision for (benefit from) income taxes at statutory federal rate, Percentage	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit, Percentage	8.70%	(3.60%)	24.30%
Net income attributable to noncontrolling interests, Percentage	(5.80%)	(4.70%)	4.20%
Change in valuation allowance, Percentage	6.80%	(63.20%)	(79.20%)
Nondeductible goodwill, Percentage		9.80%	(2.60%)
Amended return adjustments, Percentage	(4.40%)
Nondeductible loss on divestiture, Percentage		(3.40%)	(3.50%)
Other, Percentage		0.30%	(1.40%)
Provision for (benefit from) income taxes and effective tax rate for income (loss), Percentage	26.30%	(43.80%)	(37.20%)