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Long-term assets - E.1.5. Goodwill and indefinite useful life trademarks (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of information for cash-generating units [line items]    
Goodwill $ 4,265 $ 4,094
Intangible assets, net 915 912
Guatemala    
Disclosure of information for cash-generating units [line items]    
Goodwill 2,489 2,477
Intangible assets, net 915 912
Panama    
Disclosure of information for cash-generating units [line items]    
Goodwill 907 907
El Salvador    
Disclosure of information for cash-generating units [line items]    
Goodwill 194 194
Costa Rica    
Disclosure of information for cash-generating units [line items]    
Goodwill 142 139
Paraguay    
Disclosure of information for cash-generating units [line items]    
Goodwill 49 41
Colombia    
Disclosure of information for cash-generating units [line items]    
Goodwill 158 135
Nicaragua    
Disclosure of information for cash-generating units [line items]    
Goodwill 197 197
Bolivia    
Disclosure of information for cash-generating units [line items]    
Goodwill 2 $ 3
Uruguay (see note A.1.2.)    
Disclosure of information for cash-generating units [line items]    
Goodwill 127  
Ecuador    
Disclosure of information for cash-generating units [line items]    
Goodwill $ 0