v3.26.1
FAIR VALUE MEASUREMENT - Market Valuation Adjustments (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
Credit and funding valuation adjustments contra-liability (contra-asset)          
Counterparty CVA $ (583)   $ (583)   $ (561)
Asset FVA (709)   (709)   (573)
Citigroup (own credit) CVA 304   304   331
Liability FVA 174   174   185
Total CVA and FVA—derivative instruments (814)   (814)   $ (618)
Credit, Funding and Debt Valuation Adjustments Gain (Loss) [Abstract]          
Counterparty CVA (23) $ (37) (88) $ (61)  
Asset FVA 77 (40) 22 (3)  
Own credit CVA (99) (27) (2) 19  
Liability FVA (20) 12 28 17  
Derivative Credit Risk and Funding Valuation Adjustment, Gain (Loss), Net (65) (92) (40) (28)  
DVA related to own FVO liabilities (1,403) (391) 429 609  
Total CVA, DVA and FVA $ (1,468) $ (483) $ 389 $ 581