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Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Change in valuation allowance	$ 3	$ 3	$ 4
Unrecognized tax benefits that would impact effective tax rate	17
Proceeds from Income Tax Refunds		46
Income tax benefit	$ 873	517	$ 769
Tax benefit on amended tax return		$ (19)

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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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The amount of cash received during the period as refunds for the overpayment of taxes.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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