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Income Taxes (Valuation Allowance on Deferred Tax Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Valuation Allowance, Deferred Tax Asset [Roll Forward]      
Balance, beginning of year $ 159 $ 147 $ 143
Charged to costs and expenses 11 28 6
Other adjustments 120 (16) (2)
Balance, ending of year 290 159 147
Federal      
Valuation Allowance, Deferred Tax Asset [Roll Forward]      
Balance, beginning of year 22 20 15
Charged to costs and expenses 3 2 5
Other adjustments 0 0 0
Balance, ending of year 25 22 20
State      
Valuation Allowance, Deferred Tax Asset [Roll Forward]      
Balance, beginning of year 109 107 116
Charged to costs and expenses 0 16 (8)
Other adjustments 23 (14) (1)
Balance, ending of year 132 109 107
Foreign Operations      
Valuation Allowance, Deferred Tax Asset [Roll Forward]      
Balance, beginning of year 28 20 12
Charged to costs and expenses 8 10 9
Other adjustments 97 (2) (1)
Balance, ending of year $ 133 $ 28 $ 20