Annual report [Section 13 and 15(d), not S-K Item 405]

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

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Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Variable Interest Entity [Line Items]      
Carrying value of receivables in trusts $ 1,185,700 $ 1,095,835  
Long-term debt 317,816 283,279  
Total assets $ 3,411,738 $ 3,261,299
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 true
Customer Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure $ 1,700 $ 1,100  
Collateralized Debt Obligations      
Variable Interest Entity [Line Items]      
Maximum loss exposure 60 65  
Tax Credit Vehicles      
Variable Interest Entity [Line Items]      
Investments in affordable housing, renewable energy and certain other projects 24,400 26,000  
Unfunded capital contributions $ 8,100 $ 8,900  
Investment Proportional Amortization Method Elected Statement Of Financial Position Extensible Enumeration Not Disclosed Flag 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 true
Tax credits and other benefits $ 4,600 $ 4,700 $ 4,600
Investment amortization $ 3,300 $ 3,500 $ 3,400
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax expense 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 Income tax expense
Additional gain, losses and other returns $ 133 $ 171 $ 171
Renewable Energy Investments      
Variable Interest Entity [Line Items]      
Equity method investments 1,000 1,100  
Equity method investments, unfunded commitments $ 2,600 2,700  
Term of unfunded capital contributions (in years) 10 years    
Investment Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure $ 2,800 2,500  
Consolidated VIEs      
Variable Interest Entity [Line Items]      
Carrying value of receivables in trusts 17,875 19,144  
Long-term debt 6,847 8,457  
Total assets 24,852 24,119  
Consolidated VIEs | Investment Vehicles      
Variable Interest Entity [Line Items]      
Total assets 58 6  
Consolidated VIEs | Leveraged Lease Trusts      
Variable Interest Entity [Line Items]      
Total assets 850 1,000  
Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Liquidity commitments to unconsolidated securitization trusts 1,100 1,000  
Unconsolidated VIEs | Tax Credit Vehicles      
Variable Interest Entity [Line Items]      
Total assets 86,500 85,700  
Unconsolidated VIEs | Investment Vehicles      
Variable Interest Entity [Line Items]      
Total assets 30,000 23,000  
Credit Card and Automobile | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Carrying value of receivables in trusts 17,066 18,110  
Long-term debt 6,375 7,975  
Maximum loss exposure 9,995 9,385  
Total assets 16,388 17,381  
Credit Card and Automobile | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Carrying value of receivables in trusts 0 0  
Maximum loss exposure 0 0  
Total assets 0 0  
Resecuritization Trusts      
Variable Interest Entity [Line Items]      
Cash proceeds from new securitizations 32,400 23,900 8,600
Deconsolidation of resecuritization 580 1,100 685
Securities      
Variable Interest Entity [Line Items]      
Cash proceeds from new securitizations 4,500 3,600 $ 2,400
Municipal Bonds | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Liquidity commitments to unconsolidated securitization trusts $ 3,000 $ 1,800  
Weighted average remaining life of bonds held in the trusts in years 9 years 8 months 12 days