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Acquisitions, Investments, Dispositions and Assets Held for Sale - Radiopolis (Details) - MXN ($)
$ in Thousands
 1 Months Ended
Mar. 31, 2020
Jul. 31, 2019
Dec. 31, 2019
Disclosure of subsidiaries [line items]      
Liabilities related to assets held for sale     $ 432,812
Sistema Radiopolis, S.A. de C.V. (Radiopolis) and subsidiaries      
Disclosure of subsidiaries [line items]      
Ownership interest in subsidiary sold (as a percent)   50.00%  
Aggregate cash proceeds   $ 1,248,000  
Assets held for sale     1,675,426
Liabilities related to assets held for sale     $ 432,812
Sistema Radiopolis, S.A. de C.V. (Radiopolis) and subsidiaries | Amount to be received in March 2020      
Disclosure of subsidiaries [line items]      
Aggregate cash proceeds $ 603,395    
Sistema Radiopolis, S.A. de C.V. (Radiopolis) and subsidiaries | Amount to be received in June 2020      
Disclosure of subsidiaries [line items]      
Aggregate cash proceeds 644,605    
Dividend receivable $ 300,000