v3.26.1
Intangible Assets - Summary of Changes in Intangible Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance $ 531 $ 407 $ 424
Ending balance 1,108 531 407
Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 1,696 1,505 1,496
Increases 82 90 33
Increases from business combinations 580    
Translation effect (31) (12) (60)
Adjustment for inflation [1] 24 51 36
Decreases, reclassifications and other movements (25) 62  
Ending balance 2,326 1,696 1,505
Accumulated amortization [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 1,165 1,098 1,072
Increases 61 43 37
Translation effect (20) (7) (29)
Adjustment for inflation [1] 15 31 18
Decreases, reclassifications and other movements (3)    
Ending balance 1,218 1,165 1,098
Service concessions [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 320 261 258
Ending balance 367 320 261
Service concessions [member] | Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 1,050 964 933
Increases 74 86 31
Ending balance 1,124 1,050 964
Service concessions [member] | Accumulated amortization [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 730 703 675
Increases 27 27 28
Ending balance 757 730 703
Exploration rights [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 110 110 110
Ending balance 636 110 110
Exploration rights [member] | Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 110 110 110
Increases from business combinations 580    
Decreases, reclassifications and other movements (54)    
Ending balance 636 110 110
Other intangibles [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 101 36 56
Ending balance 105 101 36
Other intangibles [member] | Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 536 431 453
Increases 8 4 2
Translation effect (31) (12) (60)
Adjustment for inflation [1] 24 51 36
Decreases, reclassifications and other movements 29 62  
Ending balance 566 536 431
Other intangibles [member] | Accumulated amortization [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 435 395 397
Increases 34 16 9
Translation effect (20) (7) (29)
Adjustment for inflation [1] 15 31 18
Decreases, reclassifications and other movements (3)    
Ending balance $ 461 $ 435 $ 395
[1] Corresponds to the adjustment for inflation of opening balances of intangible assets of subsidiaries with the peso as functional currency which was charged to “Other comprehensive income” in the statement of comprehensive income.