v3.25.4
INVESTMENTS - Debt Securities Held-to-Maturity (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Debt Securities Held-to-maturity      
Total amortized cost $ 189,831 $ 242,382  
Gross unrecognized gains 156 133  
Gross unrecognized losses 10,467 18,105  
Fair value 179,520 224,410  
Transfer of investment securities from HTM to AFS [1],[2],[3] 0 0 $ 3,324
Mortgage-backed securities      
Debt Securities Held-to-maturity      
Total amortized cost 66,919 73,789  
Gross unrecognized gains 24 12  
Gross unrecognized losses 6,949 10,442  
Fair value 59,994 63,359  
U.S. government-sponsored agency guaranteed      
Debt Securities Held-to-maturity      
Total amortized cost 65,631 72,542  
Gross unrecognized gains 3 0  
Gross unrecognized losses 6,834 10,291  
Fair value 58,800 62,251  
Other      
Debt Securities Held-to-maturity      
Total amortized cost 1,288 1,247  
Gross unrecognized gains 21 12  
Gross unrecognized losses 115 151  
Fair value 1,194 1,108  
U.S. Treasury securities      
Debt Securities Held-to-maturity      
Total amortized cost 89,494 126,142  
Gross unrecognized gains 0 0  
Gross unrecognized losses 3,010 6,934  
Fair value 86,484 119,208  
State and municipal      
Debt Securities Held-to-maturity      
Total amortized cost 8,608 8,903  
Gross unrecognized gains 40 27  
Gross unrecognized losses 469 668  
Fair value 8,179 8,262  
Foreign government      
Debt Securities Held-to-maturity      
Total amortized cost 790 988  
Gross unrecognized gains 20 3  
Gross unrecognized losses 0 0  
Fair value 810 991  
Asset-backed securities      
Debt Securities Held-to-maturity      
Total amortized cost 24,020 32,560  
Gross unrecognized gains 72 91  
Gross unrecognized losses 39 61  
Fair value $ 24,053 $ 32,590  
[1] In January 2023, Citi adopted ASU 2022-01. Upon adoption, Citi transferred $3.3 billion of mortgage-backed securities from HTM classification to AFS classification as allowed under the ASU. At the time of transfer, the securities were in an unrealized gain position of $0.1 billion, which was recorded in AOCI upon transfer.
[2] Operating and finance lease right-of-use assets and lease liabilities represent non-cash investing and financing activities, respectively, and are not included in the non-cash investing activities presented here. See Note 29 for more information and balances as of December 31, 2025 and 2024.
[3] See “Significant Disposals” in Note 2.