v3.26.1
SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Variable Interest Entity    
Total involvement with SPE assets $ 688,766 $ 665,896
Consolidated VIE/SPE assets 2,894,654 2,657,202
Significant unconsolidated VIE assets 635,797 606,495
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 81,472 73,311
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 3,614 3,604
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 26,200 22,187
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 152 161
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 111,438 99,263
Private equity    
Variable Interest Entity    
Significant unconsolidated VIE assets 136,500 138,700
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 2,000 1,700
Private equity    
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 10,000 9,200
Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 52,969 59,401
Credit card securitizations    
Variable Interest Entity    
Total involvement with SPE assets 22,385 27,811
Significant unconsolidated VIE assets 0 0
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 0 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 0 0
Credit card securitizations | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 22,385 27,811
Mortgage securitizations - U.S. agency-sponsored    
Variable Interest Entity    
Total involvement with SPE assets 140,025 129,615
Significant unconsolidated VIE assets 140,025 129,615
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 3,367 3,413
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 0 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 105 112
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 3,472 3,525
Mortgage securitizations - U.S. agency-sponsored | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 0 0
Mortgage securitizations - Non-agency-sponsored    
Variable Interest Entity    
Total involvement with SPE assets 65,404 66,060
Significant unconsolidated VIE assets 65,404 66,060
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 3,626 3,586
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 0 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 359 435
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 3,985 4,021
Mortgage securitizations - Non-agency-sponsored | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 0 0
Citi-administered asset-backed commercial paper conduits    
Variable Interest Entity    
Total involvement with SPE assets 20,009 19,188
Significant unconsolidated VIE assets 0 0
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 0 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 0 0
Citi-administered asset-backed commercial paper conduits | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 20,009 19,188
Collateralized loan obligations (CLOs)    
Variable Interest Entity    
Total involvement with SPE assets 2 492
Significant unconsolidated VIE assets 2 492
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 1 208
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 0 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 1 208
Collateralized loan obligations (CLOs) | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 0 0
Asset-based financing    
Variable Interest Entity    
Total involvement with SPE assets 404,882 391,983
Significant unconsolidated VIE assets 398,620 383,245
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 70,410 63,351
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 556 606
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 22,138 17,996
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 93,104 81,953
Asset-based financing | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 6,262 8,738
Municipal securities tender option bond trusts (TOBs)    
Variable Interest Entity    
Total involvement with SPE assets 4,258 3,575
Significant unconsolidated VIE assets 0 0
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 0 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 0 0
Municipal securities tender option bond trusts (TOBs) | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 4,258 3,575
Municipal investments    
Variable Interest Entity    
Total involvement with SPE assets 22,860 21,953
Significant unconsolidated VIE assets 22,860 21,953
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 3,153 2,723
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 2,882 2,841
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 3,646 3,666
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 9,681 9,230
Municipal investments | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 0 0
Client intermediation    
Variable Interest Entity    
Total involvement with SPE assets 2,095 172
Significant unconsolidated VIE assets 2,045 88
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 884 1
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 1 0
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 0 0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 47 49
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 932 50
Client intermediation | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets 50 84
Investment funds    
Variable Interest Entity    
Total involvement with SPE assets 6,846 5,047
Significant unconsolidated VIE assets 6,841 5,042
Funded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, debt investments 31 29
Maximum exposure to loss in significant unconsolidated VIEs, equity investments 175 157
Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments 57 90
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives 0 0
Funded and Unfunded Exposure    
Maximum exposure to loss in significant unconsolidated VIEs 263 276
Investment funds | Consolidated VIEs    
Variable Interest Entity    
Consolidated VIE/SPE assets $ 5 $ 5