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Employee Benefit Plans - Funded Status Recognized on Balance Sheet (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Defined Pension  Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Other assets $ 131 $ 117
Other liabilities (8) (8)
Net amount recognized as of December 31, 123 109
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Other assets 0 0
Other liabilities (3) (5)
Net amount recognized as of December 31, $ (3) $ (5)