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Financial Instruments - Derivative (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |  |  |
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Dec. 31, 2017 MXN ($) $ / $ Institution | Dec. 31, 2016 MXN ($) | Dec. 31, 2015 MXN ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 MXN ($) | Nov. 30, 2017 | Dec. 31, 2016 USD ($) | Dec. 31, 2016 MXN ($)
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | $ 2,263,874 |  |  |
Carrying Value, Non-current assets |  |  |  |  | 748,833 |  |  | $ 647,770
Carrying Value, Liabilities |  |  |  |  |  |  |  | $ 5,508
Notional Amount |  |  |  |  | $ 123,550,897 |  |  |
Interest rate swap maturity at April 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 7.2663% | 7.2663% |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | $ 22,112 |  |  |  |  |  |  |
Interest rate swap maturity at April 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gain (loss) on change in fair value of hedge instruments | 58,278 | $ (102,641) |  |  |  |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | 344,958 | 351,773 |  |  |  |  |  |
Interest rate swap maturity at May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gain (loss) on change in fair value of hedge instruments | 26,457 | (29,059) |  |  |  |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | 241,561 | 223,994 |  |  |  |  |  |
Interest rate swap maturity between September 2017 through March 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gain (loss) on change in fair value of hedge instruments | $ (5,140) |  |  |  |  |  |  |
Interest rate swap maturity through March 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  | $ 625,000 |  |  |
Interest rate swap maturity between September 2016 through March 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gain (loss) on change in fair value of hedge instruments |  | (79,999) |  |  |  |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments |  | (5,508) |  |  |  |  |  |
TVI |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Number of financial institutions for derivative agreements | Institution | 2 |  |  |  |  |  |  |
Gain (loss) on change in fair value of hedge instruments | $ 10,204 | $ 64,877 | $ (28,659) |  |  |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | 3,024 |  |  |  |  |  |  |
TVI | Interest rate swap maturity at April 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | (459) |  |  |  |  |  |  |
Fixed interest rate | Interest rate swap maturity between September 2017 through March 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 7.4325% | 7.4325% |  |  |
Average fixed rate | Interest rate swap maturity at April 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 5.9351% | 5.9351% |  |  |
Average fixed rate | Interest rate swap maturity at May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 6.5716% | 6.5716% |  | 5.6148% | 5.6148%
TIIE | Interest rate swap maturity at April 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 0.35% | 0.35% |  |  |
TIIE | Interest rate swap maturity at May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 0.35% | 0.35% |  |  |
Not designated as hedging instruments | Options maturity at December 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gains on change in fair value of derivatives | 558,280 |  |  |  |  |  |  |
Not designated as hedging instruments | Forwards maturity between January2018 through December 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gains on change in fair value of derivatives | $ 397,037 |  |  |  |  |  |  |
Average foreign exchange rate | $ / $ | 18.5439 |  |  |  |  |  |  |
Not designated as hedging instruments | TVI | Options maturity at December 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | $ 100,700 |  |  |
Notional Amount |  |  |  | $ 96,250 |  |  |  |
Gains on change in fair value of derivatives | $ 70,409 |  |  |  |  |  |  |
Not designated as hedging instruments | TVI | Interest rate swap maturity between April 2019 through May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Non-current assets |  |  |  |  |  |  |  | $ 72,003
Notional Amount |  |  |  |  |  |  |  | 1,376,667
Not designated as hedging instruments | Empresas Cablevision | Options maturity at December 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 110,137 |  |  |
Notional Amount |  |  |  | 115,000 |  |  |  |
Gains on change in fair value of derivatives | 80,464 |  |  |  |  |  |  |
Designated as hedging instruments |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Non-current assets |  |  |  |  |  |  |  | 647,770
Notional Amount |  |  |  | 2,440,300 | 48,086,944 |  | $ 2,386,600 | 49,352,779
Designated as hedging instruments | Interest rate swap maturity at April 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 344,958 |  |  |
Notional Amount |  |  |  |  | 6,000,000 |  |  |
Designated as hedging instruments | Interest rate swap maturity at May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 241,561 |  |  |
Notional Amount |  |  |  |  | 5,000,000 |  |  |
Designated as hedging instruments | Interest rate swap maturity at October 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 43,222 |  |  |
Notional Amount |  |  |  |  | 2,000,000 |  |  |
Designated as hedging instruments | Interest rate swap maturity at October 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 31,906 |  |  |
Notional Amount |  |  |  |  | 1,500,000 |  |  |
Designated as hedging instruments | Interest rate swap maturity at February 2023 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 3,077 |  |  |
Notional Amount |  |  |  |  | 1,000,000 |  |  |
Designated as hedging instruments | Forwards maturity at January 2018 through November 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 112,157 |  |  |
Notional Amount |  |  |  | 224,000 |  |  |  |
Designated as hedging instruments | TVI | Interest rate swap maturity between April 2019 through May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 61,997 |  |  |
Notional Amount |  |  |  |  | 1,296,783 |  |  |
Designated as hedging instruments | TVI | Interest rate swap maturity at April 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 22,112 |  |  |
Notional Amount |  |  |  |  | 1,370,868 |  |  |
Cash flow hedges | Not designated as hedging instruments | Options maturity at December 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 795,010 |  |  |
Notional Amount |  |  |  | 779,250 |  |  |  |
Cash flow hedges | Not designated as hedging instruments | Forwards maturity between January2018 through December 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Assets |  |  |  |  | 397,037 |  |  |
Notional Amount |  |  |  | $ 230,400 |  |  |  |
Cash flow hedges | Designated as hedging instruments | Interest rate swap maturity at April 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Non-current assets |  |  |  |  |  |  |  | 351,773
Notional Amount |  |  |  |  | 6,000,000 |  |  | 6,000,000
Cash flow hedges | Designated as hedging instruments | Interest rate swap maturity at May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Non-current assets |  |  |  |  |  |  |  | 223,994
Notional Amount |  |  |  |  | $ 5,000,000 |  |  | 2,500,000
Cash flow hedges | Designated as hedging instruments | Interest rate swap maturity at October 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  |  |  | 7.3275% |  |
Cumulative gain (loss) on change in fair value of hedge instruments | 43,222 |  |  |  |  |  |  |
Cash flow hedges | Designated as hedging instruments | Interest rate swap maturity at October 2021 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 7.35% | 7.35% |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | 31,906 |  |  |  |  |  |  |
Cash flow hedges | Designated as hedging instruments | Interest rate swap maturity at February 2023 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 7.795% | 7.795% |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | 3,077 |  |  |  |  |  |  |
Cash flow hedges | Designated as hedging instruments | Forwards maturity at January 2018 through November 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Gain (loss) on change in fair value of hedge instruments | (292,326) |  |  |  |  |  |  |
Cumulative gain (loss) on change in fair value of hedge instruments | $ 112,157 |  |  |  |  |  |  |
Cash flow hedges | Designated as hedging instruments | Interest rate swap maturity between September 2017 through March 2018 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Carrying Value, Liabilities |  |  |  |  |  |  |  | 5,508
Notional Amount |  |  |  |  |  |  |  | $ 1,250,000
Minimum | Fixed interest rate | TVI | Interest rate swap maturity between April 2019 through May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 4.85% | 4.85% |  |  |
Maximum | Fixed interest rate | TVI | Interest rate swap maturity between April 2019 through May 2022 |  |  |  |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |  |  |  |
Borrowing interest rate (as a percent) |  |  |  | 5.585% | 5.585% |  |  |

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