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Accounts Payable, Accrued Liabilities and Asset Retirement Obligations - Summary of Movements in Asset Retirement Obligations (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of asset retirement obligations [abstract]    
Beginning balance $ 16,288,631 $ 11,569,897
Effect of translation (119,928) 2,806,374
Increase of the year 3,160,320 2,510,635
Applications payments (126,088) (121,317)
Applications reversals (957,806) (476,958)
Ending balance $ 18,245,129 $ 16,288,631