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Income Taxes - Reconciliation Of Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Balance at beginning of year $ 22 $ 21
Additions based on tax positions related to the current year 30 3
Additions for tax positions of prior years 9 1
Reductions for tax positions of prior years (1) 0
Settlements with taxing authorities 0 (2)
Lapse of statutes of limitations (5) (1)
Balance at end of year $ 55 $ 22