v3.26.1
Mortgage Banking Activities, Servicing Portfolio (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Residential mortgage servicing rights [Member]    
Servicing Asset at Amortized Cost [Line Items]    
Loans serviced for others $ 387,000 $ 397,000
Weighted average loan rate 3.78% 3.78%
Servicer advances, net of an allowance for uncollectible amounts $ 571 $ 688
Commercial mortgage servicing [Member]    
Servicing Asset at Amortized Cost [Line Items]    
Loans serviced for others $ 77,000 $ 77,000
Weighted average loan rate 4.10% 4.11%
Servicer advances, net of an allowance for uncollectible amounts $ 28 $ 26