v3.26.1
Fair Value Measurement - Level 3 Analysis (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
Long-term debt          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 2 into level 3, liabilities $ 157 $ 27 $ 260 $ 185  
Transfers from level 3 into level 2, liabilities 795 529 1,394 1,122  
Realized/unrealized gains (losses), liabilities (3,656) (2,443) (2,466) (2,233)  
Non-U.S. government debt securities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 2 into level 3, assets 25 54 25 54  
Transfers from level 3 into level 2, assets 22 24 30 24  
Realized/unrealized gains (losses), assets 97 24 90 36  
Non-trading loans          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 2 into level 3, assets 493 152 833 605  
Transfers from level 3 into level 2, assets 248 148 424 330  
Realized/unrealized gains (losses), assets 52 145 145 174  
Recurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Assets fair value 2,252,446   2,252,446   $ 1,829,852
Recurring | Long-term debt          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 3 into level 2, liabilities 795   1,400 1,100  
Recurring | Non-U.S. government debt securities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Increase in level 3 assets 590   552    
Recurring | Derivative receivables          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Increase in level 3 assets 1,200   4,100    
Recurring | Non-trading loans          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 2 into level 3, assets     833    
Recurring | Equity | Derivative liabilities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 2 into level 3, liabilities 971   1,100 1,000  
Transfers from level 3 into level 2, liabilities     798 904  
Recurring | Equity | Derivative receivables          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Transfers from level 2 into level 3, assets     852 819  
Transfers from level 3 into level 2, assets     761 793  
Level 3 | Recurring          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Assets fair value 29,965   29,965   $ 25,107
Increase in level 3 assets 1,900   4,900    
Realized/unrealized gains (losses), assets 2,800 1,600 5,700 4,000  
Realized/unrealized gains (losses), liabilities $ (4,000) $ (2,700) $ (2,700) $ (2,600)