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Intangible Assets - Summary of Changes in Intangible Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance $ 407 $ 424 $ 462
Ending balance 531 407 424
Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 1,505 1,496 1,490
Increases 90 33 29
Translation effect (12) (60) (32)
Adjustment for inflation [1] 51 36 35
Decreases, reclassifications and other movements 62 0 (26)
Ending balance 1,696 1,505 1,496
Accumulated amortization [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 1,098 1,072 1,028
Increases 43 37 43
Translation effect (7) (29) (10)
Adjustment for inflation [1] 31 18 11
Ending balance 1,165 1,098 1,072
Service concessions [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 261 258 260
Ending balance 320 261 258
Service concessions [member] | Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 964 933 908
Increases 86 31 25
Ending balance 1,050 964 933
Service concessions [member] | Accumulated amortization [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 703 675 648
Increases 27 28 27
Ending balance 730 703 675
Exploration rights [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 110 110 136
Ending balance 110 110 110
Exploration rights [member] | Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 110 110 136
Decreases, reclassifications and other movements     (26)
Ending balance 110 110 110
Other intangibles [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 36 56 66
Ending balance 101 36 56
Other intangibles [member] | Cost [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 431 453 446
Increases 4 2 4
Translation effect (12) (60) (32)
Adjustment for inflation [1] 51 36 35
Decreases, reclassifications and other movements 62   0
Ending balance 536 431 453
Other intangibles [member] | Accumulated amortization [member]      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Beginning balance 395 397 380
Increases 16 9 16
Translation effect (7) (29) (10)
Adjustment for inflation [1] 31 18 11
Ending balance $ 435 $ 395 $ 397
[1] Corresponds to 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.