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v3.20.1

Other Liabilities, Provisions and Commitments - Additional Information (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of contingent liabilities [line items] |  |  |
Aggregate amount claimed against company | $ 77,649 |  |
Tax contingencies amount | 53,937 |  |
Commitments for the Purchase of property, plant and equipment | 556 |  |
Brazil [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Litigation amount | 10,471 | $ 7,739 | $ 9,433
Value added tax [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Tax contingencies amount | 10,378 |  |
Value added tax [member] | State of Sao Paulo [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Tax contingencies amount | 3,183 |  |
Tax credits [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Tax contingencies amount | 34,102 |  |
Federal taxes [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Tax contingencies amount | $ 6,274 |  |

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- Definition The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 74 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_74_c&doctype=Standard -URIDate 2019-03-27 + Details
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