v3.25.1
Debt Securities Available for Sale - Weighted average yield and contractual maturities of debt securities AFS - Parenthetical (Details) - Debt securities available-for-sale - USD ($)
$ in Billions
Mar. 31, 2025
Dec. 31, 2024
Asset pledged as collateral    
Schedule of Available-for-sale Securities [Line Items]    
Debt securities $ 14.3 $ 13.9
Debt securities served as collateral for public funds 13.3 12.9
Asset Not Pledged as Collateral    
Schedule of Available-for-sale Securities [Line Items]    
Debt securities $ 5.1 $ 4.3