Quarterly report [Sections 13 or 15(d)]

Outstanding Loans and Leases and Allowance for Credit Losses - Payment Status of Modifications to Borrowers in Financial Difficulty (Details)

v3.25.3
Outstanding Loans and Leases and Allowance for Credit Losses - Payment Status of Modifications to Borrowers in Financial Difficulty (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Sep. 30, 2024
Consumer real estate    
Financing Receivable, Modified [Line Items]    
Total $ 200 $ 284
Consumer real estate | Current    
Financing Receivable, Modified [Line Items]    
Total 113 182
Consumer real estate | 30–89 Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 44 54
Consumer real estate | 90+ Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 43 48
Consumer real estate | Residential Mortgage    
Financing Receivable, Modified [Line Items]    
Total 179 252
Consumer real estate | Residential Mortgage | Current    
Financing Receivable, Modified [Line Items]    
Total 94 153
Consumer real estate | Residential Mortgage | 30–89 Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 42 52
Consumer real estate | Residential Mortgage | 90+ Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 43 47
Consumer real estate | Home equity    
Financing Receivable, Modified [Line Items]    
Total 21 32
Consumer real estate | Home equity | Current    
Financing Receivable, Modified [Line Items]    
Total 19 29
Consumer real estate | Home equity | 30–89 Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 2 2
Consumer real estate | Home equity | 90+ Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 0 1
Commercial    
Financing Receivable, Modified [Line Items]    
Total 4,386 3,291
Commercial | United States    
Financing Receivable, Modified [Line Items]    
Total 1,535 1,282
Commercial | Non United States    
Financing Receivable, Modified [Line Items]    
Total 44 36
Commercial | Current    
Financing Receivable, Modified [Line Items]    
Total 4,027 2,896
Commercial | Current | United States    
Financing Receivable, Modified [Line Items]    
Total 1,431 1,193
Commercial | Current | Non United States    
Financing Receivable, Modified [Line Items]    
Total 44 36
Commercial | 30–89 Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 186 61
Commercial | 30–89 Days Past Due | United States    
Financing Receivable, Modified [Line Items]    
Total 82 58
Commercial | 30–89 Days Past Due | Non United States    
Financing Receivable, Modified [Line Items]    
Total 0 0
Commercial | 90+ Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 173 334
Commercial | 90+ Days Past Due | United States    
Financing Receivable, Modified [Line Items]    
Total 22 31
Commercial | 90+ Days Past Due | Non United States    
Financing Receivable, Modified [Line Items]    
Total 0 0
Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total 2,807 1,973
Commercial | Commercial real estate | Current    
Financing Receivable, Modified [Line Items]    
Total 2,552 1,667
Commercial | Commercial real estate | 30–89 Days Past Due    
Financing Receivable, Modified [Line Items]    
Total 104 3
Commercial | Commercial real estate | 90+ Days Past Due    
Financing Receivable, Modified [Line Items]    
Total $ 151 $ 303