FAIR VALUE MEASUREMENT - Market Valuation Adjustments (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Credit and funding valuation adjustments contra-liability (contra-asset) | |||||
| Counterparty CVA | $ (654) | $ (654) | $ (561) | ||
| Asset FVA | (608) | (608) | (539) | ||
| Citigroup (own credit) CVA | 347 | 347 | 346 | ||
| Liability FVA | 218 | 218 | 209 | ||
| Total CVA and FVA—derivative instruments | (697) | (697) | $ (545) | ||
| Credit, Funding and Debt Valuation Adjustments Gain (Loss) [Abstract] | |||||
| Counterparty CVA | (37) | $ (25) | (61) | $ (17) | |
| Asset FVA | (40) | 2 | (3) | 86 | |
| Own credit CVA | (27) | 6 | 19 | (46) | |
| Liability FVA | 12 | 27 | 17 | (30) | |
| Derivative Credit Risk and Funding Valuation Adjustment, Gain (Loss), Net | (92) | 10 | (28) | (7) | |
| DVA related to own FVO liabilities | (391) | 343 | 609 | (407) | |
| Total CVA, DVA and FVA | $ (483) | $ 353 | $ 581 | $ (414) | |