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Income Taxes - Rollforward of Total Unrecognized Tax Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 1,713	$ 1,614	$ 2,031
Tax positions related to current year:
Additions	129	147	121
Reductions	0	0	0
Tax positions related to prior years:
Additions	225	161	398
Reductions	(31)	(179)	(481)
Settlements	(10)	(28)	(454)
Lapse of statute of limitations	(68)	(2)	(1)
Ending balance	$ 1,959	$ 1,713	$ 1,614

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Unrecognized Tax Benefits, Current Period Tax Positions

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Unrecognized Tax Benefits, Prior Period Tax Positions

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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