Annual report pursuant to Section 13 and 15(d)

Income Taxes - Unrecognized Tax Benefits Rollforward (Details)

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Income Taxes - Unrecognized Tax Benefits Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits at beginning of period $ 21 $ 18 $ 5
Increases related to tax positions taken during a prior year 1 1 1
Increases related to tax positions taken during the current year 9 8 12
Decreases related to tax positions taken during a prior year 0 (6) 0
Unrecognized tax benefits at end of period $ 31 $ 21 $ 18