v3.26.1
Loans and Related Allowance for Credit Losses (Narrative) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
portfolio_segment
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]      
Number of portfolio segments | portfolio_segment 2    
Financing receivable, after allowance for credit loss $ 356,260   $ 327,071
Allowance for credit loss 5,495 $ 5,218 5,200
Total commercial lending      
Financing Receivable, Credit Quality Indicator [Line Items]      
Subsequently defaulted FDM/ TDR 23 44  
Allowance for credit loss 3,962 3,733  
Total consumer lending      
Financing Receivable, Credit Quality Indicator [Line Items]      
Subsequently defaulted FDM/ TDR 20 27  
Allowance for credit loss 1,533 $ 1,485  
Federal Reserve Bank | Asset Pledged as Collateral without Right      
Financing Receivable, Credit Quality Indicator [Line Items]      
Financing receivable, after allowance for credit loss 58,200   55,000
Federal Home Loan Bank | Asset Pledged as Collateral without Right      
Financing Receivable, Credit Quality Indicator [Line Items]      
Financing receivable, after allowance for credit loss $ 89,400   $ 80,600