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Income Taxes - Summary of Reconciliation Between Tax Expense and Income Before Income Taxes (Detail) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Major components of tax expense (income) [abstract] |  |  |
Applicable tax rate | 30.00% | 30.00% | 30.00%
Income tax from prior years | (0.38%) | (2.66%) | (0.50%)
(Loss) on monetary position for subsidiaries in hyperinflationary economies | (0.62%) | (0.50%) | (0.96%)
Annual inflation tax adjustment | 0.73% | 0.78% | (0.32%)
Non-deductible expenses | 2.49% | 3.92% | 2.43%
Non-taxable income | 0.00% | 0.00% | (0.78%)
Income taxed at a rate other than the Mexican statutory rate | 0.08% | 1.28% | 1.69%
Effect of restatement of tax values | (1.81%) | (1.47%) | (3.38%)
Effect of change in statutory rate | (0.23%) | (0.52%) | (0.38%)
Income tax credits | (10.34%) | (0.18%) | (0.13%)
Tax loss | 13.80% | (1.01%) | 1.04%
Other | 0.04% | 1.04% | 1.89%
Total | 33.76% | 30.68% | 30.60%

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Tax rate effects, in aggregate, on the reconciliation between the average effective tax rate and the applicable tax rate that the entity does not separately disclose in the reconciliation. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from adjustments for the current tax of prior periods. [Refer: Average effective tax rate; Applicable tax rate; Adjustments for current tax of prior periods] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the expenses not deductible in determining taxable profit. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from revenue that is exempt from taxation. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from tax losses. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Percentage of tax effect of income tax credits + References No definition available. + Details
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