Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.0.1
Outstanding Loans and Leases and Allowance for Credit Losses - Modifications to Borrowers in Financial Difficulty and Financial Effect of Modified Loans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Consumer real estate    
Financing Receivable, Modified [Line Items]    
Total $ 264 $ 671
As a % of Financing Receivables 0.10% 0.26%
Consumer real estate | Forbearance and Other Payment Plans    
Financing Receivable, Modified [Line Items]    
Total $ 47 $ 486
Consumer real estate | Permanent Modification    
Financing Receivable, Modified [Line Items]    
Total 217 185
Consumer real estate | Residential Mortgage    
Financing Receivable, Modified [Line Items]    
Total $ 232 $ 583
As a % of Financing Receivables 0.10% 0.26%
Consumer real estate | Residential Mortgage | Forbearance and Other Payment Plans    
Financing Receivable, Modified [Line Items]    
Total $ 46 $ 429
Weighted-average duration 7 months 8 months
Consumer real estate | Residential Mortgage | Permanent Modification    
Financing Receivable, Modified [Line Items]    
Total $ 186 $ 154
Weighted-average duration 9 years 7 months 6 days 9 years 10 months 24 days
Weighted-average Interest Rate Reduction 1.25% 1.41%
Consumer real estate | Home equity    
Financing Receivable, Modified [Line Items]    
Total $ 32 $ 88
As a % of Financing Receivables 0.12% 0.34%
Consumer real estate | Home equity | Forbearance and Other Payment Plans    
Financing Receivable, Modified [Line Items]    
Total $ 1 $ 57
Weighted-average duration   9 months
Consumer real estate | Home equity | Permanent Modification    
Financing Receivable, Modified [Line Items]    
Total $ 31 $ 31
Weighted-average duration 17 years 8 months 12 days 17 years 8 months 12 days
Weighted-average Interest Rate Reduction 2.61% 2.74%
Commercial    
Financing Receivable, Modified [Line Items]    
Total $ 3,948 $ 3,278
As a % of Financing Receivables 0.67% 0.59%
Commercial | United States    
Financing Receivable, Modified [Line Items]    
Total $ 1,528 $ 1,046
As a % of Financing Receivables 0.39% 0.29%
Commercial | Non United States    
Financing Receivable, Modified [Line Items]    
Total $ 27 $ 160
As a % of Financing Receivables 0.02% 0.13%
Commercial | Term Extension    
Financing Receivable, Modified [Line Items]    
Total $ 3,142 $ 2,808
Commercial | Term Extension | United States    
Financing Receivable, Modified [Line Items]    
Total 1,266 1,016
Commercial | Term Extension | Non United States    
Financing Receivable, Modified [Line Items]    
Total 27 136
Commercial | Forbearances    
Financing Receivable, Modified [Line Items]    
Total 706 446
Commercial | Forbearances | United States    
Financing Receivable, Modified [Line Items]    
Total 262 30
Commercial | Forbearances | Non United States    
Financing Receivable, Modified [Line Items]    
Total 0 0
Commercial | Interest Rate Reduction    
Financing Receivable, Modified [Line Items]    
Total 100 24
Commercial | Interest Rate Reduction | United States    
Financing Receivable, Modified [Line Items]    
Total 0 0
Commercial | Interest Rate Reduction | Non United States    
Financing Receivable, Modified [Line Items]    
Total 0 24
Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total $ 2,393 $ 2,072
As a % of Financing Receivables 3.64% 2.84%
Commercial | Commercial real estate | Term Extension    
Financing Receivable, Modified [Line Items]    
Total $ 1,849 $ 1,656
Commercial | Commercial real estate | Forbearances    
Financing Receivable, Modified [Line Items]    
Total 444 416
Commercial | Commercial real estate | Interest Rate Reduction    
Financing Receivable, Modified [Line Items]    
Total $ 100 $ 0