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Income Taxes - Effective Tax Rate On Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax (benefit) expense at statutory rate	$ (55)	$ (398)	$ 161
State income tax, net of federal benefit	(36)	(71)	31
Nondeductible expenses	5	5	8
Net operating loss carryback	0	(73)	0
Foreign tax credit re-characterization	0	(13)	0
Foreign rate differential	(5)	2	(3)
Valuation allowance	4	10	0
Unrecognized tax benefit	7	(3)	0
Other, net	(1)	2	2
Total income tax (benefit) expense	$ (81)	$ (539)	$ 199

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

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