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Income Taxes - Uncertain Tax Positions (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]          
Balance, beginning of period $ 27 $ 23 $ 26 $ 22  
Gross increases - tax positions in current period 0 1 1 2  
Balance, end of period 27 23 27 23  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Unrecognized Tax Benefits 27 23 27 23  
Gross increases - tax positions in current period 0 1 1 2  
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations $ 0 $ (1) $ 0 $ (1)  
Tax Year 2020          
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]          
Gross increases - tax positions in current period         $ 4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gross increases - tax positions in current period         $ 4