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Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Derivative [Line Items]    
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other investments Other investments
Asset Derivatives $ 88 $ 57
Derivative assets 57 (1)
Gross Amounts of Recognized (Liabilities) (43) (50)
Derivative liabilities (12) 8
Derivative Liabilities    
Derivative [Line Items]    
Derivative, Collateral, Obligation to Return Cash 11 (22)
Gross Amounts of Recognized (Liabilities) (43) (50)
Gross Amounts Offset in the Statement of Financial Position, liabilities (42) (36)
Derivative liabilities (12) 8
Financial Collateral (Received) (1) (13)
Net amount, liabilities 0 (1)
Derivative Assets    
Derivative [Line Items]    
Asset Derivatives 88 57
Gross Amounts Offset in the Statement of Financial Position, assets 86 55
Derivative assets 57 (1)
Derivative, Collateral, Obligation to Return Cash (55) 3
Financial Collateral Pledged 0 0
Net Amount, assets $ 2 $ 2