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Income Taxes Accounting for Uncertainty in Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Unrecognized Tax Benefits $ 20 $ 20 $ 17
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 18    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit 1    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 1 1 0
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns      
Unrecognized Tax Benefits, Beginning of Period 20 17 19
Settlements     (1)
Reduction due to lapse of statute of limitations     (1)
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions   3  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions (1) (1)  
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 1 1  
Unrecognized Tax Benefits, End of Period $ 20 $ 20 $ 17