v3.26.1
Securities - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]          
Unrealized loss $ 281   $ 281   $ 163
Unrealized loss on securities 15,583   $ 15,583   3,146
Macroeconomic factors supportable period     24 months    
Reversion to average loss factors period     8 months    
Allowance for credit losses- securities held to maturity 2   $ 2   2
Debt securities, available-for-sale, realized loss 45 $ 0 55 $ 13  
State and municipal securities          
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]          
Unrealized loss 26   26   67
Unrealized loss on securities 358   358   1,212
Available for sale securities, sold 974   974    
Debt securities, available-for-sale, realized loss 29        
Collateral Pledged          
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]          
Investments pledged to secure deposits $ 7,600   $ 7,600   $ 4,100