v3.26.1
SIGNIFICANT DISPOSALS AND OTHER BUSINESS EXITS (Details)
shares in Millions, $ in Millions, $ in Billions
3 Months Ended
Apr. 29, 2026
USD ($)
shares
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Mar. 31, 2025
USD ($)
Jun. 30, 2026
Feb. 23, 2026
MXN ($)
shares
Feb. 18, 2026
USD ($)
Sep. 24, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Currency translation adjustment (CTA), net of hedges   $ (889)   $ (849)        
Loss on sale of disposals [1]   18   0        
Banamex                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Percentage owned of equity investment               24.00%
Poland Consumer Banking Business | Held for sale                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Loss on sale   177            
Loss on sale after tax   135            
Income before taxes   21   32        
Cash and deposits with banks   4,570            
Loans (net of allowance of $24 at March 31, 2026)   1,625            
Allowance   24            
Other assets   60            
Total assets   6,255            
Deposits   5,956            
Other liabilities   61            
Total liabilities   6,017            
Deposits with banks   4,500            
AO Citibank | Held for sale                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Income before taxes   $ 24   $ (17)        
Cash and deposits with banks             $ 2,000  
Other assets             11,400  
Total assets             13,500  
Deposits             1,700  
Total liabilities             $ 13,700  
Loss on sale, before tax     $ 1,200          
Loss on sale after tax     $ 1,100          
Grupo Financeiro Banamex | Disposal Group, Disposed of by Sale, Not Discontinued Operations                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Interest in entity sold           0.24    
Amount sold (in shares) | shares           499    
Disposal Group, Including Discontinued Operation, Consideration           $ 43    
Grupo Financeiro Banamex | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Forecast                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Interest in entity sold         0.014      
Grupo Financeiro Banamex | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent event                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Interest in entity sold 0.226              
Amount sold (in shares) | shares 470              
Disposal Group, Including Discontinued Operation, Consideration $ 2,300              
Stockholders' Equity, Period Increase (Decrease) 1,700              
Currency translation adjustment (CTA), net of hedges 2,100              
Loss on sale of disposals $ 400              
[1]     See “Significant Disposals” in Note 2.