v3.26.3
Derivative Instruments and Hedging Activities - Schedule of Carrying Amount and Associated Cumulative Basis Adjustment Related to the Application of Hedge Accounting (Details) - Interest Rate Contract - Fair Value Hedges - Designated as Hedging Instrument - USD ($)
$ in Millions
1 Months Ended
Apr. 30, 2022
Sep. 30, 2026
Dec. 31, 2025
Securities available for sale      
Derivative [Line Items]      
Carrying amount of assets   $ 1,215 $ 3,701
Hedge accounting basis adjustment, assets   (133) (48)
Derivative asset, notional amount, terminated $ 164    
Hedged asset, fair value, terminated 14    
Gain (loss) on fair value hedges recognized on termination $ 1    
Deferred gain on discontinuation of fair value hedge   3  
Interest-bearing deposits      
Derivative [Line Items]      
Carrying amount of liabilities   (1,673) 0
Hedge accounting basis adjustment, liabilities   (27) 0
FHLB advances and other borrowings      
Derivative [Line Items]      
Carrying amount of liabilities   (3,358) (1,174)
Hedge accounting basis adjustment, liabilities   $ (102) $ (1)