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Income Taxes - Available Tax Loss Carryforwards Recorded in Deferred Tax Assets (Detail) $ in Thousands | Dec. 31, 2018 MXN ($)
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Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2018 | $ 88,109,766
Tax loss carryforward benefit | 27,881,491
Brazil [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2018 | 59,695,441
Tax loss carryforward benefit | 20,296,450
Austria [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2018 | 20,128,833
Tax loss carryforward benefit | 5,032,208
Mexico [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2018 | 6,043,603
Tax loss carryforward benefit | 1,813,081
Colombia [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2018 | 2,239,486
Tax loss carryforward benefit | 739,030
Nicaragua [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2018 | 2,403
Tax loss carryforward benefit | $ 722

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