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

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

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Fair Value Option - Gains (Losses) Related to Assets and Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option $ 4,184 $ 4,833 $ 3,363
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 319 60 (143)
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 10 251 (164)
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (38) (3) (950)
Trading inventory – other      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 2,965 5,121 (1,159)
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 113 (107) (85)
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option 18 44 (51)
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 (30) 22 (304)
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (8) (15) (23)
Short-term borrowings      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 199 7 639
Unfunded loan commitments      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (13) 38 8
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (13) 39 8
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 378 609 11
Long-term debt      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option 550 (1,178) 4,313
Gains (Losses) Related to Borrower-specific Credit Risk for Assets and Liabilities Accounted for Under the Fair Value Option (3) 0 0
Other      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (307) 10 247
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 4,228 4,763 3,702
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 327 74 (153)
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 (30) 251 (164)
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 2,965 5,121 (1,159)
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 93 (174) (58)
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 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 199 7 639
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 (1) 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 378 609 11
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 582 (1,143) 4,359
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 (286) 19 227
Other Income      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option (44) 70 (339)
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 (8) (14) 10
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 40 0 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 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 20 67 (27)
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 (30) 22 (304)
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 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 (13) 39 8
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 0 0 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 (32) (35) (46)
Other Income | Other      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Related to Assets and Liabilities Accounted for Under the Fair Value Option $ (21) $ (9) $ 20