v3.26.1
Fair Value Option - Fair Value Loans on Nonaccrual Status (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value Disclosures [Abstract]    
Nonaccrual loans $ 1,278 $ 1,240
Nonaccrual loans 90 or more days past due $ 236 $ 124