Quarterly report [Sections 13 or 15(d)]

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

v3.26.1
Outstanding Loans and Leases and Allowance for Credit Losses - Modifications to Borrowers in Financial Difficulty and Financial Effect of Modified Loans (Details) - Commercial - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Modified [Line Items]        
Total $ 1,373 $ 1,709 $ 2,284 $ 2,740
As a % of Financing Receivables 0.20% 0.27% 0.33% 0.44%
United States        
Financing Receivable, Modified [Line Items]        
Total $ 985 $ 501 $ 1,545 $ 744
As a % of Financing Receivables 0.22% 0.12% 0.34% 0.18%
Non United States        
Financing Receivable, Modified [Line Items]        
Total $ 81 $ 0 $ 88 $ 42
As a % of Financing Receivables 0.05% 0.00% 0.06% 0.03%
Term Extension        
Financing Receivable, Modified [Line Items]        
Total $ 964 $ 1,166 $ 1,574 $ 2,046
Term Extension | United States        
Financing Receivable, Modified [Line Items]        
Total 586 397 1,133 610
Term Extension | Non United States        
Financing Receivable, Modified [Line Items]        
Total 71 0 78 33
Forbearances        
Financing Receivable, Modified [Line Items]        
Total 409 543 710 694
Forbearances | United States        
Financing Receivable, Modified [Line Items]        
Total 399 104 412 134
Forbearances | Non United States        
Financing Receivable, Modified [Line Items]        
Total 10 0 10 9
Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Total 0 0 0 0
Interest Rate Reduction | United States        
Financing Receivable, Modified [Line Items]        
Total 0 0 0 0
Interest Rate Reduction | Non United States        
Financing Receivable, Modified [Line Items]        
Total 0 0 0 0
Commercial real estate        
Financing Receivable, Modified [Line Items]        
Total $ 307 $ 1,208 $ 651 $ 1,954
As a % of Financing Receivables 0.43% 1.84% 0.92% 2.98%
Commercial real estate | Term Extension        
Financing Receivable, Modified [Line Items]        
Total $ 307 $ 769 $ 363 $ 1,403
Commercial real estate | Forbearances        
Financing Receivable, Modified [Line Items]        
Total 0 439 288 551
Commercial real estate | Interest Rate Reduction        
Financing Receivable, Modified [Line Items]        
Total $ 0 $ 0 $ 0 $ 0