v3.25.2
Credit Quality and the Allowance for Loan and Lease Losses - Summary of Amortized Cost Basis of Modifications to Borrowers Experiencing Financial Difficulty (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty $ 53 $ 31 $ 100 $ 52
Term Extension        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 0 1 8
Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 5 4 7
Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 43 13 52 14
Term Extension and Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 1
Term Extension and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 6 13 39 22
Term Extension, Interest Rate Reduction and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 2 0 4 0
Commercial | Commercial and industrial loans        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 44 19 56 28
Commercial | Commercial and industrial loans | Term Extension        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 0 1 8
Commercial | Commercial and industrial loans | Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Commercial | Commercial and industrial loans | Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 43 13 52 13
Commercial | Commercial and industrial loans | Term Extension and Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 1
Commercial | Commercial and industrial loans | Term Extension and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 6 3 6
Commercial | Commercial and industrial loans | Term Extension, Interest Rate Reduction and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Commercial | Commercial mortgage owner-occupied loans        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 23 0
Commercial | Commercial mortgage owner-occupied loans | Term Extension        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Commercial | Commercial mortgage owner-occupied loans | Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Commercial | Commercial mortgage owner-occupied loans | Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Commercial | Commercial mortgage owner-occupied loans | Term Extension and Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Commercial | Commercial mortgage owner-occupied loans | Term Extension and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 23 0
Commercial | Commercial mortgage owner-occupied loans | Term Extension, Interest Rate Reduction and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Residential Mortgage        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 7 7 16 17
Residential Mortgage | Term Extension        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Residential Mortgage | Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Residential Mortgage | Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 1
Residential Mortgage | Term Extension and Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Residential Mortgage | Term Extension and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 6 7 13 16
Residential Mortgage | Term Extension, Interest Rate Reduction and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 0 3 0
Consumer | Home equity        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 1 1 1
Consumer | Home equity | Term Extension        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Home equity | Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 1 0 1
Consumer | Home equity | Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Home equity | Term Extension and Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Home equity | Term Extension and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Home equity | Term Extension, Interest Rate Reduction and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 0 1 0
Consumer | Credit card        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 4 4 6
Consumer | Credit card | Term Extension        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Credit card | Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 1 4 4 6
Consumer | Credit card | Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Credit card | Term Extension and Interest Rate Reduction        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Credit card | Term Extension and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty 0 0 0 0
Consumer | Credit card | Term Extension, Interest Rate Reduction and Payment Delay        
Financing Receivable, Allowance for Credit Losses        
Amortized cost basis of the modifications to borrowers experiencing financial difficulty $ 0 $ 0 $ 0 $ 0