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Income Taxes - Deferred Tax Valuation Allowance (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Deferred tax valuation allowance, rollfoward      
Balance at beginning of year $ 216    
Balance at end of year 266 $ 216  
Deferred tax asset valuation allowance      
Deferred tax valuation allowance, rollfoward      
Balance at beginning of year 216 177 $ 149
Charged to Income tax expense 54 39 28
Charged to (Gain) loss on sale of business and other exit costs, net (4) 0 0
Balance at end of year $ 266 $ 216 $ 177