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Income Taxes - Available Tax Loss Carryforwards Recorded in Deferred Tax Assets (Detail) $ in Thousands | Dec. 31, 2019 MXN ($)
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Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | $ 84,075,983
Tax loss carryforward benefit | 26,630,407
Brazil [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 52,118,464
Tax loss carryforward benefit | 17,720,278
Austria [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 14,470,465
Tax loss carryforward benefit | 3,617,616
Mexico [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 13,980,757
Tax loss carryforward benefit | 4,194,227
Colombia [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 2,354,479
Tax loss carryforward benefit | 776,978
Peru [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 392,999
Tax loss carryforward benefit | 115,935
Chile [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 754,221
Tax loss carryforward benefit | 203,640
Puerto Rico [member] |
Disclosure of tax losses available for carryforward [line items] |
Balance of available tax loss carryforwards at December 31, 2019 | 4,598
Tax loss carryforward benefit | $ 1,733

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