v3.26.1
Reserves for Credit Losses - Changes in Other Loan Reserve (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Provisions for credit losses $ 1,084 $ 1,405 $ 2,336 $ 2,555  
Other Loans          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning reserves 314 244 323 194 $ 194
Provisions for credit losses 62 78 111 183  
Net write-offs     (141)   (242)
Other 0 1 0 1  
Ending reserves 312 272 312 272 $ 323
Other Loans | Principal          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Net write-offs (61) (48) (115) (101)  
Recoveries 11 8 20 15  
Other Loans | Interest and fees          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Net write-offs $ (3) $ (3) $ (6) $ (5)