v3.26.1
Derivatives (Gross Interest Rate Swaps and Collateral Pledge) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivative Assets    
Asset Derivatives $ 81 $ 84
Derivative Liabilities    
Derivative liability 181 179
Interest rate contracts    
Derivative Assets    
Derivative assets gross amounts offsetting the balance sheets 0 0
Asset Derivatives 80 84
Derivative asset, subject to master netting arrangement, collateral, obligation to return security not offset 4 26
Derivative asset, subject to master netting arrangement, collateral, obligation to return cash not offset 50 35
Derivative asset, subject to master netting arrangement, before offset of collateral 26 23
Derivative Liabilities    
Derivative liability, gross amounts offset in balance sheets 0 0
Derivative liability 178 179
Derivative liability, subject to master netting arrangement, collateral, right to reclaim security not offset 4 26
Derivative liability, subject to master netting arrangement, collateral, right to reclaim cash not offset 1 0
Derivative liability, subject to master netting arrangement, before offset of collateral 173 153
Interest rate contracts | Not Designated as Hedging Instrument    
Derivative Assets    
Derivative assets, gross amounts of recognized assets 80 84
Derivative Liabilities    
Derivative liability, subject to master netting arrangement, before offset $ 178 $ 179