Quarterly report [Sections 13 or 15(d)]

Fair Value Option - Gains (Losses) Related to Assets and Liabilities (Details)

v3.26.1
Fair Value Option - Gains (Losses) Related to Assets and Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option $ (3,208) $ 1,663
Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (91) 132
Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 268 112
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (86) 160
Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (2,515) 1,707
Consumer and commercial loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 121 19
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (16) 0
Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (32) 60
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (17) 1
Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 155 41
Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (1) (9)
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (1) (9)
Accrued expenses and other liabilities    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (76) (7)
Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (1,049) (267)
Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 12 (125)
Market making and similar activities    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (3,027) 1,635
Market making and similar activities | Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (89) 134
Market making and similar activities | Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 267 112
Market making and similar activities | Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (2,515) 1,707
Market making and similar activities | Consumer and commercial loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 137 18
Market making and similar activities | Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 0 0
Market making and similar activities | Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 155 41
Market making and similar activities | Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 0 0
Market making and similar activities | Accrued expenses and other liabilities    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 19 (7)
Market making and similar activities | Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (1,039) (255)
Market making and similar activities | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 38 (115)
Other Income    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (181) 28
Other Income | Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (2) (2)
Other Income | Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 1 0
Other Income | Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 0 0
Other Income | Consumer and commercial loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (16) 1
Other Income | Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (32) 60
Other Income | Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 0 0
Other Income | Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (1) (9)
Other Income | Accrued expenses and other liabilities    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (95) 0
Other Income | Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (10) (12)
Other Income | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option $ (26) $ (10)