v3.26.1
Borrowings (Narrative) (Details) - USD ($)
$ in Billions
Mar. 31, 2026
Dec. 31, 2025
Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items]    
FHLB advances $ 3.4 $ 3.2
Minimum    
Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items]    
FHLB advances fixed interest rate 3.84%  
Maximum    
Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items]    
FHLB advances fixed interest rate 3.87%