v3.26.1
Derivatives (Estimated Fair Value of Derivatives Assets and Liabilities after Master Netting Agreements and Cash Collateral) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Offsetting Derivative Assets [Abstract]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral $ 8,799 $ 6,568
Derivative Asset, Not Offset, Policy Election Deduction (6,226) (3,861)
Derivative Asset, Collateral, Obligation to Return Cash, Offset (1,383) (1,374)
Derivative Asset, Fair Value, Amount Offset Against Collateral 1,190 1,333
Derivative Asset, Collateral, Obligation to Return Securities, Offset (1,093) (1,330)
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction, Net of Securities Collateral 97 3
Offsetting Derivative Liabilities [Abstract]    
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 8,207 5,099
Derivative Liability, Not Offset, Policy Election Deduction (6,226) (3,861)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 0 0
Derivative Liability, Fair Value, Amount Offset Against Collateral 1,981 1,238
Derivative Liability, Collateral, Right to Reclaim Securities, Offset (1,981) (1,238)
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction, Net of Securities Collateral $ 0 $ 0