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Financial Assets and Liabilities - Summary of Categorization of Financial Instruments, Excluding Cash and Cash Equivalents (Detail) - MXN ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial Assets:
Financial Assets	$ 260,844,607	$ 257,974,604
Financial Liabilities:
Financial Liabilities	813,864,161	711,544,172
Loans and receivables [member]
Financial Assets:
Financial Assets	207,635,765	196,453,950
Loans and receivables [member] | Related parties [member]
Financial Assets:
Financial Assets	1,273,140	1,263,605
Fair value through profit or loss [member]
Financial Assets:
Financial Assets	6,825,760	5,287,548
Fair value through OCI [member]
Financial Assets:
Financial Assets	37,572,410	39,028,083
Equity investments at fair value through OCI and other short term investments [member]
Financial Assets:
Financial Assets	47,718,025	49,015,934
Equity investments at fair value through OCI and other short term investments [member] | Loans and receivables [member]
Financial Assets:
Financial Assets	10,145,615	9,987,851
Equity investments at fair value through OCI and other short term investments [member] | Fair value through OCI [member]
Financial Assets:
Financial Assets	37,572,410	39,028,083
Accounts receivable from subscribers distributors contractual assets and other net [member] | Loans and receivables [member]
Financial Assets:
Financial Assets	196,217,010	185,202,494
Financial instruments, class [member]
Financial Liabilities:
Financial Liabilities	9,596,751	17,107,579
Financial instruments, class [member] | Fair value through profit or loss [member]
Financial Assets:
Financial Assets	6,825,760	5,287,548
Liability Related to Right of Use of Assets [Member]
Financial Liabilities:
Financial Liabilities	120,596,733
Liability Related to Right of Use of Assets [Member] | Loans and receivables [member]
Financial Liabilities:
Financial Liabilities	120,596,733
Loans and receivables [member]
Financial Liabilities:
Financial Liabilities	964,424,453	863,853,933
Loans and receivables [member] | Related parties [member]
Financial Liabilities:
Financial Liabilities	3,460,419	2,974,213
Loans and receivables [member] | Debt [Member]
Financial Liabilities:
Financial Liabilities	624,254,477	638,922,453
Loans and receivables [member] | Accounts payable [Member]
Financial Liabilities:
Financial Liabilities	216,112,824	221,957,267
Fair value through profit or loss [Member]
Financial Liabilities:
Financial Liabilities	9,596,751	17,107,579
Fair value through profit or loss [Member] | Financial instruments, class [member]
Financial Liabilities:
Financial Liabilities	$ 9,596,751	$ 17,107,579

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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