v3.26.1
Derivatives (Estimated Fair Value of Derivative Assets and Liabilities after Master Netting Agreements and Cash Collateral) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Offsetting Assets [Line Items]    
Derivative Asset, Fair Value, Gross Asset Excluding Accruals $ 5,842 $ 5,475
Derivative Liability, Fair Value, Gross Liability Excluding Accruals 2,751 2,908
Net amount of derivative assets after application of master netting agreements and cash collateral 41 16
Net amount of derivative liabilities after application of master netting agreements and cash collateral 3 2
Over the Counter [Member]    
Offsetting Assets [Line Items]    
Derivative Asset, Fair Value, Gross Asset Excluding Accruals 5,727 5,406
Derivative Liability, Fair Value, Gross Liability Excluding Accruals 2,737 2,897
Gross estimated fair value of derivative assets (2,006) (2,006)
Gross estimated fair value of derivative liabilities (2,006) (2,006)
Cash collateral on derivative assets (1,966) (1,620)
Cash collateral on derivative liabilities 0 0
Securities collateral on derivative assets (1,733) (1,772)
Securities collateral on derivative liabilities (728) (890)
Exchange Traded [Member]    
Offsetting Assets [Line Items]    
Derivative Asset, Fair Value, Gross Asset Excluding Accruals 1 3
Derivative Liability, Fair Value, Gross Liability Excluding Accruals 10 0
Gross estimated fair value of derivative assets (1) 0
Gross estimated fair value of derivative liabilities (1) 0
Securities collateral on derivative assets 0 0
Securities collateral on derivative liabilities (9) 0
Cleared [Member]    
Offsetting Assets [Line Items]    
Derivative Asset, Fair Value, Gross Asset Excluding Accruals 114 66
Derivative Liability, Fair Value, Gross Liability Excluding Accruals 4 11
Gross estimated fair value of derivative assets (2) (5)
Gross estimated fair value of derivative liabilities (2) (5)
Cash collateral on derivative assets (93) (56)
Cash collateral on derivative liabilities 0 0
Securities collateral on derivative assets 0 0
Securities collateral on derivative liabilities $ (2) $ (5)