v3.25.4
INVESTMENTS - Overview (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investment Holdings [Line Items]      
Total investments $ 444,229 $ 476,657  
Accrued interest receivable 2,000 2,000  
Interest and dividends on investments      
Taxable interest 16,034 17,978 $ 17,654
Interest exempt from U.S. federal income tax 287 317 334
Dividend income 408 367 312
Total interest and dividend income on investments 16,729 18,662 18,300
Gross realized investments losses, excluding losses from other-than-temporary impairment      
Gross realized investment gains 543 533 324
Gross realized investment losses (72) (205) (136)
Net realized gains on sales of investments 471 328 188
Securities available-for-sale      
Allowance for credit losses 7 6  
Fair value 246,720 226,876  
Portfolio-layer cumulative basis adjustments 17 (72)  
Transfer of investment securities from HTM to AFS [1],[2],[3] 0 0 $ 3,324
Less than 12 months $ 416 1,086  
Percentage of investments gross-unrealized loss position for less than a year, rated investment grade 67.00%    
12 months or longer $ 711 1,633  
Percentage of gross-unrealized loss position for a year or more rated investment grade 83.00%    
Discontinued Operations, Held-for-sale | Poland Consumer Banking Business      
Securities available-for-sale      
Loss on sale of business, foreign currency translation adjustments, pretax $ 181    
Available-for-sale (AFS) debt securities      
Investment Holdings [Line Items]      
Total investments 246,720 226,876  
HTM debt securities      
Investment Holdings [Line Items]      
Total investments 189,831 242,382  
Marketable equity securities      
Investment Holdings [Line Items]      
Total investments 475 151  
Non-marketable equity securities measured using the measurement alternative      
Investment Holdings [Line Items]      
Total investments 1,707 1,574  
Mortgage-backed securities      
Securities available-for-sale      
Amortized cost 37,943 31,028  
Allowance for credit losses 0 0  
Gross unrealized gains 173 34  
Gross unrealized losses 384 1,131  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax (211) (1,097)  
Fair value 37,732 29,931  
Less than 12 months 110 305  
12 months or longer 274 826  
U.S. government-sponsored agency guaranteed      
Securities available-for-sale      
Amortized cost 36,967 30,401  
Allowance for credit losses 0 0  
Gross unrealized gains 172 34  
Gross unrealized losses 383 1,129  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax (211) (1,095)  
Fair value 36,756 29,306  
Less than 12 months 110 304  
12 months or longer 273 825  
Other      
Securities available-for-sale      
Amortized cost 976 627  
Allowance for credit losses 0 0  
Gross unrealized gains 1 0  
Gross unrealized losses 1 2  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax 0 (2)  
Fair value 976 625  
Less than 12 months 0 1  
12 months or longer 1 1  
U.S. Treasury      
Securities available-for-sale      
Amortized cost 35,400 52,630  
Allowance for credit losses 0 0  
Gross unrealized gains 93 13  
Gross unrealized losses 28 264  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax 65 (251)  
Fair value 35,465 52,379  
Less than 12 months 6 166  
12 months or longer 22 98  
U.S. Treasury and federal agency securities      
Securities available-for-sale      
Fair value 35,465    
State and municipal      
Securities available-for-sale      
Amortized cost 1,589 1,749  
Allowance for credit losses 0 0  
Gross unrealized gains 5 12  
Gross unrealized losses 57 103  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax (52) (91)  
Fair value 1,537 1,658  
Less than 12 months 9 72  
12 months or longer 48 31  
Foreign government      
Securities available-for-sale      
Amortized cost 162,801 134,002  
Allowance for credit losses 0 0  
Gross unrealized gains 902 444  
Gross unrealized losses 596 1,087  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax 306 (643)  
Fair value 163,107 133,359  
Less than 12 months 260 487  
12 months or longer 336 600  
Corporate      
Securities available-for-sale      
Amortized cost 4,734 4,923  
Allowance for credit losses 7 6  
Gross unrealized gains 20 19  
Gross unrealized losses 56 122  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax (36) (103)  
Fair value 4,691 4,814  
Less than 12 months 25 45  
12 months or longer 31 77  
Asset-backed securities      
Securities available-for-sale      
Amortized cost 1,071 856  
Allowance for credit losses 0 0  
Gross unrealized gains 8 3  
Gross unrealized losses 6 11  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax 2 (8)  
Fair value 1,073 848  
Less than 12 months 6 11  
12 months or longer 0 0  
Other debt securities      
Securities available-for-sale      
Amortized cost 3,113 3,887  
Allowance for credit losses 0 0  
Gross unrealized gains 2 1  
Gross unrealized losses 0 1  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax 2 0  
Fair value 3,115 3,887  
Less than 12 months 0 0  
12 months or longer 0 1  
Debt securities      
Securities available-for-sale      
Amortized cost 246,651 229,075  
Allowance for credit losses 7 6  
Gross unrealized gains 1,203 526  
Gross unrealized losses 1,127 2,719  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax 76 (2,193)  
Fair value 246,720 226,876  
Portfolio-layer cumulative basis adjustments, amortized cost 133 (193)  
Portfolio-layer cumulative basis adjustments (133) 193  
Total AFS debt securities 246,784 228,882  
Total debt securities, net unrealized gains (losses) (57) (2,000)  
Fair value | Non-marketable equity securities      
Investment Holdings [Line Items]      
Total investments 446 427  
Fair value | Non-marketable equity securities measured using the measurement alternative      
Investment Holdings [Line Items]      
Alternative investment funds, fair value 37 23  
Carried at cost | Non-marketable equity securities      
Investment Holdings [Line Items]      
Total investments $ 5,050 $ 5,247  
[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.