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]    
Estimated fair value of derivative assets presented in the consolidated balance sheets $ 7,814 $ 7,178
Estimated fair value of derivative liabilities presented in the consolidated balance sheets 7,036 7,547
Net amount of derivative assets after application of master netting agreements and cash collateral 112 32
Net amount of derivative liabilities after application of master netting agreements and cash collateral 13 13
Over the Counter [Member]    
Offsetting Assets [Line Items]    
Gross estimated fair value of derivative assets 7,612 7,053
Gross estimated fair value of derivative liabilities 6,400 6,972
Gross estimated fair value of derivative assets (2,951) (3,015)
Gross estimated fair value of derivative liabilities (2,951) (3,015)
Cash collateral on derivative assets (2,323) (1,808)
Cash collateral on derivative liabilities 0 0
Securities collateral on derivative assets (2,279) (2,211)
Securities collateral on derivative liabilities (3,436) (3,945)
Cleared [Member]    
Offsetting Assets [Line Items]    
Gross estimated fair value of derivative assets 174 119
Gross estimated fair value of derivative liabilities 621 569
Gross estimated fair value of derivative assets (7) (7)
Gross estimated fair value of derivative liabilities (7) (7)
Cash collateral on derivative assets (140) (105)
Cash collateral on derivative liabilities (609) (555)
Securities collateral on derivative assets 0 0
Securities collateral on derivative liabilities (5) (6)
Exchange-traded    
Offsetting Assets [Line Items]    
Gross estimated fair value of derivative assets 28 6
Gross estimated fair value of derivative liabilities 15 6
Gross estimated fair value of derivative assets (2) 0
Gross estimated fair value of derivative liabilities (2) 0
Cash collateral on derivative assets 0 0
Cash collateral on derivative liabilities (4) (1)
Securities collateral on derivative assets 0 0
Securities collateral on derivative liabilities $ (9) $ (5)