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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, 2018
Dec. 31, 2017
Disclosure of asset retirement obligations [abstract]    
Beginning balance $ 18,245,129 $ 16,288,631
Effect of translation (2,020,853) (119,928)
Increase of the year 1,062,745 3,160,320
Applications payments (151,364) (126,088)
Applications reversals (1,164,056) (957,806)
Ending balance $ 15,971,601 $ 18,245,129