Income Taxes - Income Taxes at Federal Statutory Rate (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amount
Tax Expense (Benefit) at Federal Statutory Rate	$ 407	$ 84	$ (5)
State taxes, net of federal benefit	70	8	3
Non-controlling interests	0	0	1
Change in valuation allowance	0	0	(285)
Deferred adjustments	(6)	(5)	2
Nondeductible items	2	7	5
Other, net	(2)	(1)	1
Total income tax expense (benefit)	$ 471	$ 93	$ (278)
Percent
Tax Expense (Benefit) at Federal Statutory Rate	21.00%	21.00%	21.00%
State taxes, net of federal benefit	3.60%	1.70%	(17.50%)
Non-controlling interests	0.00%	0.00%	(3.10%)
Change in valuation allowance	0.00%	0.00%	1172.80%
Deferred adjustments	(0.30%)	(1.10%)	(9.30%)
Nondeductible items	0.10%	1.70%	(19.90%)
Other, net	(0.10%)	(0.30%)	(0.80%)
Total income tax expense (benefit)	24.30%	23.00%	1143.20%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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