v3.25.4
Derivatives and Hedging Activities - Carrying Amount of Hedged Items Currently Designated in a Hedging Relationship and Related Cumulative Hedging Adjustment (Detail) - Accounted for as hedges - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Investments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Value $ 42,449 $ 34,755
Cumulative Hedging Adjustment, Assets 244 (279)
Deposits    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Value 762 1,840
Cumulative Hedging Adjustment, Liabilities (17) (52)
Unsecured short-term borrowings    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Value 4,694 14,720
Cumulative Hedging Adjustment, Liabilities (25) (113)
Unsecured long-term borrowings    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying Value 143,082 130,161
Cumulative Hedging Adjustment, Liabilities $ (7,340) $ (10,757)