Quarterly report [Sections 13 or 15(d)]

Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Narrative (Details)

v3.26.1
Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Variable Interest Entity [Line Items]          
Carrying value of receivables in trusts $ 1,217,619   $ 1,217,619   $ 1,185,700
Long-term debt 339,863   339,863   317,816
Total assets 3,499,191 $ 3,440,798 $ 3,499,191 $ 3,440,798 3,411,738
Investment Program Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag     true true  
Customer Vehicles          
Variable Interest Entity [Line Items]          
Maximum loss exposure 2,600   $ 2,600   1,700
Collateralized Debt Obligations          
Variable Interest Entity [Line Items]          
Maximum loss exposure 55   55   60
Tax Credit Vehicles          
Variable Interest Entity [Line Items]          
Total retained positions 24,300   24,300   25,400
Investments in affordable housing, renewable energy and certain other projects 23,100   23,100   24,400
Unfunded capital contributions $ 7,400   $ 7,400   $ 8,100
Investment Proportional Amortization Method Elected Statement Of Financial Position Extensible Enumeration Not Disclosed Flag true   true   true
Investment Program Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag     true true  
Tax credits and other benefits $ 1,100 1,200 $ 2,100 $ 2,300  
Investment amortization 764 839 $ 1,500 $ 1,700  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]     Income tax expense Income tax expense  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]     Income tax expense Income tax expense  
Additional gain, losses and other returns 39 41 $ 73 $ 61  
Renewable Energy Investments          
Variable Interest Entity [Line Items]          
Equity method investments 1,100   1,100   $ 1,000
Equity method investments, unfunded commitments 3,600   $ 3,600   2,600
Term of unfunded capital contributions (in years)     10 years    
Investment Vehicles          
Variable Interest Entity [Line Items]          
Maximum loss exposure 3,700   $ 3,700   2,800
Consolidated VIEs          
Variable Interest Entity [Line Items]          
Carrying value of receivables in trusts 17,905   17,905   17,875
Long-term debt 7,555   7,555   6,847
Total assets 25,639   25,639   24,852
Consolidated VIEs | Investment Vehicles          
Variable Interest Entity [Line Items]          
Total assets 64   64   58
Consolidated VIEs | Leveraged Lease Trusts          
Variable Interest Entity [Line Items]          
Total assets 828   828   850
Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Liquidity commitments to unconsolidated securitization trusts 1,200   1,200   1,100
Unconsolidated VIEs | Tax Credit Vehicles          
Variable Interest Entity [Line Items]          
Total assets 85,000   85,000   86,500
Unconsolidated VIEs | Investment Vehicles          
Variable Interest Entity [Line Items]          
Total assets 33,800   33,800   30,000
Credit Card and Automobile | Consolidated VIEs          
Variable Interest Entity [Line Items]          
Carrying value of receivables in trusts 17,127   17,127   17,066
Long-term debt 7,319   7,319   6,375
Maximum loss exposure 9,153   9,153   9,995
Total assets 16,491   16,491   16,388
Credit Card and Automobile | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Carrying value of receivables in trusts 0   0   0
Maximum loss exposure 0   0   0
Total assets 0   0   0
Total retained positions 0   0   0
Resecuritization Trusts          
Variable Interest Entity [Line Items]          
Deconsolidation of resecuritization   368   495  
Cash proceeds from new securitizations 10,200 7,200 22,400 18,500  
Securities          
Variable Interest Entity [Line Items]          
Cash proceeds from new securitizations 325 $ 771 1,200 $ 2,800  
Municipal Bonds | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Liquidity commitments to unconsolidated securitization trusts $ 3,100   $ 3,100   $ 3,000
Weighted average remaining life of bonds held in the trusts in years     9 years 1 month 6 days