Quarterly report [Sections 13 or 15(d)]

Outstanding Loans and Leases and Allowance for Credit Losses - Allowance for Credit Losses, Narrative (Details)

v3.26.1
Outstanding Loans and Leases and Allowance for Credit Losses - Allowance for Credit Losses, Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Dec. 31, 2027
Dec. 31, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]            
Allowance for credit losses, period increase (decrease)         $ (116)  
Allowance for credit losses     $ 14,264 $ 14,434 14,264 $ 14,434
Decrease in allowance for loan and lease losses         89  
Reserve for unfunded lending commitments, period decrease         27  
Decrease in provision for credit losses     226   369  
Provision for credit losses     1,366 1,592 2,703 3,072
Net charge-offs     1,412 1,525 2,821 2,977
Increase (decrease) in net charge-offs     (113)   (156)  
Credit card and other consumer            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Allowance for credit losses, period increase (decrease)         (159)  
Allowance for credit losses     7,805 8,232 7,805 8,232
Net charge-offs     1,045 1,067 2,106 2,198
Commercial            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Allowance for credit losses, period increase (decrease)         10  
Allowance for credit losses     5,948 5,798 5,948 5,798
Decrease in provision for credit losses     (151)   (158)  
Net charge-offs     372 466 722 799
Consumer real estate            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Allowance for credit losses, period increase (decrease)         33  
Allowance for credit losses     511 404 511 404
Net charge-offs     (5) $ (8) (7) $ (20)
Consumer            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Decrease in provision for credit losses     $ (75)   $ (211)  
Scenario, Forecast            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Unemployment rate, current economic outlook (just below)   5.00%        
U.S. gross domestic product, current economic outlook (as a percent) 1.80% 1.40%