v3.26.1
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Reclassification out of AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Realized gains and (losses) $ 169 $ 138 $ 439 $ 259
Subtotal, pretax 8,029 5,219 15,546 10,667
Tax effect (2,005) (1,186) (3,583) (2,526)
Income (loss) from continuing operations 6,024 4,033 11,963 8,141
Subtotal, pretax 504 19 863 278
Other Noninterest Expense (1,274) (1,076) (2,383) (2,256)
Citigroup's accumulated other comprehensive income (loss)        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax (32) 75 (77) 194
Citigroup's accumulated other comprehensive income (loss) | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax (32) 75 (77) 194
Total tax effect 8 (22) 17 (52)
Total amounts reclassified out of AOCI, pretax (40) 97 (94) 246
Realized gains (losses) on investment securities        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax (109) (100) (229) (186)
Realized gains (losses) on investment securities | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Realized gains and (losses) (169) (138) (439) (259)
Gross impairment losses 25 2 138 5
Subtotal, pretax (144) (136) (301) (254)
Tax effect 35 36 72 68
Income (loss) from continuing operations (109) (100) (229) (186)
Debt valuation adjustment (DVA)        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax 13 2 17 6
Debt valuation adjustment (DVA) | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Realized gains and (losses) 17 2 22 7
Tax effect (4) 0 (5) (1)
Income (loss) from continuing operations 13 2 17 6
Cash flow hedges        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax 18 128 44 271
Cash flow hedges | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Tax effect (6) (40) (15) (86)
Subtotal, pretax 24 168 59 357
Total amounts reclassified out of AOCI, after-tax 18 128 44 271
Cash flow hedges | (Gain) loss reclassified from AOCI | Interest rate contracts        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Subtotal, pretax 17 168 44 357
Cash flow hedges | (Gain) loss reclassified from AOCI | Foreign exchange contracts        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Subtotal, pretax 7 0 15 0
Benefit plan adjustments        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax 47 43 97 88
Benefit plan adjustments | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Other Noninterest Expense 64 61 132 121
Total amounts reclassified out of AOCI, after-tax 47 43 97 88
Total tax effect (17) (18) (35) (33)
Prior service cost (benefit) | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Other Noninterest Expense (3) (5) (6) (9)
Net actuarial loss | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Other Noninterest Expense 70 66 141 130
Curtailment/settlement impact | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Other Noninterest Expense (3) 0 (3) 0
Excluded component of fair value hedges        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax (1) 2 (2) 3
Excluded component of fair value hedges | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Subtotal, pretax (1) 2 (2) 3
Tax effect 0 0 0 0
Total amounts reclassified out of AOCI, after-tax (1) 2 (2) 3
Long-duration insurance contracts        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax 0 0 0 0
Long-duration insurance contracts | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Subtotal, pretax 0 0 0 0
Tax effect 0 0 0 0
Total amounts reclassified out of AOCI, after-tax 0 0 0 0
Foreign currency translation adjustment (CTA)        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Total amounts reclassified out of AOCI, after-tax 0 0 (4) 12
Foreign currency translation adjustment (CTA) | (Gain) loss reclassified from AOCI        
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)        
Subtotal, pretax 0 0 (4) 12
Tax effect 0 0 0 0
Total amounts reclassified out of AOCI, after-tax $ 0 $ 0 $ (4) $ 12