v3.26.1
Credit Quality and the Allowance for Loan and Lease Losses - Summary of Amortized Cost Basis of Residential Loans Modified for Borrowers Experiencing Financial Difficulty (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Modifications    
Financing receivable, excluding accrued interest, modified in period, amount $ 362 $ 254
Loan modification program, percentage of modifications to total portfolio 0.21% 0.21%
Residential Mortgage    
Financing Receivable, Modifications    
Financing receivable, excluding accrued interest, modified in period, amount $ 16 $ 18
Loan modification program, percentage of modifications to total portfolio 0.08% 0.10%
Residential Mortgage | Term Extension and Payment Delay    
Financing Receivable, Modifications    
Financing receivable, excluding accrued interest, modified in period, amount $ 10 $ 16
Loan modification program, percentage of modifications to total portfolio 0.05% 0.09%
Residential Mortgage | Term extension, interest rate reduction and payment delay    
Financing Receivable, Modifications    
Financing receivable, excluding accrued interest, modified in period, amount $ 6 $ 2
Loan modification program, percentage of modifications to total portfolio 0.03% 0.01%