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Financial Instruments - Class of Assets and Liabilities Subject to Recurring Fair Value Measurements Categorized Within Level 3 (Details) | 12 Months Ended
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Dec. 31, 2020
Non-recurring basis |
Financial Instruments |
Expected future cash flow time period | 5 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The expected period for calculation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | tv_FairValueAssumptionsExpectedFutureCashFlowPeriod
Namespace Prefix: | tv_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_NonrecurringFairValueMeasurementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |