v3.26.1
Loans and Related Allowance for Credit Losses, Allowance for Credit Losses for Loans Activity by Portfolio Segment (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, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Allowance for credit losses for loans, beginning of period $ 14,374 $ 14,552 $ 14,337 $ 14,636 $ 14,636
Provision for credit losses 911 1,007 2,050 1,932  
Loan charge-offs, total (1,200) (1,335) (2,662) (2,612)  
Loan recoveries, total 324 338 686 606  
Net loan charge-offs (876) (997) (1,976) (2,006)  
Other (2) 6 (4) 6  
Allowance for credit losses for loans, end of period 14,407 14,568 14,407 14,568 14,337
Total Commercial [Member]          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Allowance for credit losses for loans, beginning of period 7,529 7,930 7,457 7,946 7,946
Provision for credit losses 25 147 458 342  
Loan charge-offs, total (210) (330) (675) (585)  
Loan recoveries, total 54 83 159 127  
Net loan charge-offs (156) (247) (516) (458)  
Other (3) 5 (4) 5  
Allowance for credit losses for loans, end of period 7,395 7,835 7,395 7,835 7,457
Total Consumer [Member]          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Allowance for credit losses for loans, beginning of period 6,845 6,622 6,880 6,690 6,690
Provision for credit losses 886 860 1,592 1,590  
Loan charge-offs, loans (990) (1,005) (1,987) (2,027)  
Loan recoveries, loans 270 255 527 479  
Net loan charge-offs (720) (750) (1,460) (1,548)  
Other 1 1 0 1  
Allowance for credit losses for loans, end of period $ 7,012 $ 6,733 $ 7,012 $ 6,733 $ 6,880