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Share-based Incentive Compensation Plans - Compensation Cost (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation cost $ 28 $ 39
Income tax benefit 7 10
After-tax share-based compensation expense 21 29
Restricted Stock Unit (RSU) awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation cost 20 23
Performance Stock Unit (PSU) awards    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation cost $ 8 $ 16