v3.26.1
Derivatives (Primary Risks Managed by Derivatives) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 350,819 $ 304,571
Derivative assets 8,439 6,771
Derivative liabilities 7,863 5,234
Derivatives Designated as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 4,197 4,231
Derivative assets 337 266
Derivative liabilities 58 88
Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 346,622 300,340
Derivative assets 8,102 6,505
Derivative liabilities 7,805 5,146
Interest rate swaps | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 25,442 18,366
Derivative assets 125 152
Derivative liabilities 335 253
Interest rate swaps | Cash flow hedges: | Derivatives Designated as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 500 500
Derivative assets 0 0
Derivative liabilities 0 4
Interest rate floors | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 5,500 8,000
Derivative assets 0 1
Derivative liabilities 40 48
Interest rate caps | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 6,600 6,100
Derivative assets 12 5
Derivative liabilities 12 16
Interest rate options | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 38,700 26,800
Derivative assets 35 12
Derivative liabilities 400 444
Interest rate forwards | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 24,966 23,598
Derivative assets 106 127
Derivative liabilities 1,322 1,317
Foreign currency swaps | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 678 587
Derivative assets 89 75
Derivative liabilities 2 4
Foreign currency swaps | Cash flow hedges: | Derivatives Designated as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 3,697 3,731
Derivative assets 337 266
Derivative liabilities 58 84
Foreign currency forwards | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 272 303
Derivative assets 1 1
Derivative liabilities 0 0
Credit default swaps — written | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 1,128 468
Derivative assets 19 11
Derivative liabilities 0 0
Equity futures | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 3,041 1,414
Derivative assets 45 6
Derivative liabilities 42 4
Equity index options | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 87,232 69,495
Derivative assets 3,466 4,530
Derivative liabilities 2,156 1,362
Equity total return swaps | Derivatives Not Designated or Not Qualifying as Hedging Instruments:    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 153,063 145,209
Derivative assets 4,204 1,585
Derivative liabilities $ 3,496 $ 1,698