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Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Additional Information (Detail) $ in Thousands, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 MXN ($) | Apr. 24, 2020 | Dec. 31, 2019 USD ($) | Jan. 01, 2019 MXN ($)
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Weighted Average Lessees Incremental Borrowing Rate | 7.29% |  |  |  | 7.29% |
Cumulative index | 283.444 |  |  |  |  |
Percentage of annual basis index | 53.83% |  |  |  |  |
Closing exchange rate | 0.3147 | 0.5221 |  |  | 0.3147 |
Cumulative translation (loss) gain | $ (199,878,430) | $ (137,598,218) |  |  | $ (10,605) |
Impairment losses on goodwill | 0 | 0 | $ 0 |  |  |
Borrowing costs capitalised | 2,233,358 | 2,020,288 | 2,875,034 |  |  |
Impairment losses | 0 | 0 | 0 |  |  |
Impairment losses on intangibles | $ 0 |  | 0 |  |  |
Description of estimation of impairment cash-generating unit | In the estimation of impairments, the Company uses the strategic plans established for the separate cash-generating units to which the assets are assigned. Such strategic plans generally cover a period from 3 to 5 years. For longer periods, beginning in the fifth year, projections are based on such strategic plans while applying a constant or declining expected perpetual growth rate. |  |  |  |  |
Percentage of sensitivity analysis for increase in capital expenditures | 5.00% |  |  |  |  |
Adjustments of sensitivity analysis long-life assets | $ 2,129,800 |  |  |  |  |
Increase in weighted average cost of capital basis | 0.50% |  |  |  |  |
Adjustments for assumption of weighted average cost of capital | $ 1,819,169 |  |  |  |  |
Monthly contributions to pension fund | 17.50% |  |  |  |  |
Percentage of employee profit sharing based on individual company taxable income | 10.00% |  |  |  |  |
Advertising expenses | $ 22,810,211 | 26,255,952 | $ 28,718,563 |  |  |
Increase (decrease) in interest expense | $ 624,254,477 | 638,922,453 |  |  |  |
Concentration risk percentage | 10.00% |  |  |  | 10.00% |
Right fo use asset | $ 118,003,223 | $ 0 |  |  | $ 6,262 |
Lease liability | $ 120,596,733 |  |  |  |  | $ 119,387,660
Currency depreciation rate | 30.50% |  |  |  | 30.50% |
IFRS16 [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Right fo use asset | $ 119,387,660 |  |  |  |  |
Lease liability | $ 119,387,660 |  |  |  |  |
Foreign subsidiaries [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Consolidated operating revenues | 71.00% | 73.00% | 74.00% |  |  |
Percentage of operating revenue as percentage of total assets | 73.00% | 80.00% |  |  |  |
Interest rate risk [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Increase in basis points | 1.00% |  |  |  |  |
Increase in net interest expense | $ 3,674,609 |  |  |  |  |
Increase (decrease) in interest expense | $ (11,393,767) |  |  |  |  |
Currency risk [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Fluctuation in exchange rates | 5.00% |  |  |  | 5.00% |
Increase (decrease) in interest expense | $ 624,254,477 |  |  |  |  |
Increase (decrease) through changes in foreign exchange rates, regulatory deferral account credit balances | 31,391,368 |  |  |  |  |
Increase (decrease) through changes in discount rates, regulatory deferral account credit balances | $ (31,051,093) |  |  |  |  |
Increase/(decrease) in exchange rates | 5.00% |  |  |  |  |
Argentina [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Closing exchange rate | 0.3147 | 0.5221 |  |  | 0.3147 |
Argentina [member] | Impact of application of hyperinflation adjustments in 2018 [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Cumulative inflation percentage |  | 100.00% |  |  |  |
U.S.A. [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Closing exchange rate | 18.8452 | 19.6829 |  | 24.5883 | 18.8452 |
Cumulative translation adjustment [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Cumulative translation (loss) gain | $ (87,367,366) | $ (53,357,300) |  |  |  |
Licenses and rights of use [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Intangibles useful life | Licenses are amortized when the Company does not have a basis to conclude that they are indefinite lived. Licenses are amortized using the straight-line method over a period ranging from 3 to 30 years, which represents the usage period of the assets. |  |  |  |  |
Licenses and rights of use [member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Estimated useful lives | 3 years |  |  |  |  |
Licenses and rights of use [member] | Top of range [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Estimated useful lives | 30 years |  |  |  |  |
Trademarks [member] | Bottom of range [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Estimated useful lives | 1 year |  |  |  |  |
Trademarks [member] | Top of range [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Estimated useful lives | 10 years |  |  |  |  |
Customer relationships [member] |  |  |  |  |  |
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items] |  |  |  |  |  |
Intangibles useful life | amortized over a 5 year period. |  |  |  |  |
Estimated useful lives | 5 years |  |  |  |  |

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