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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, 2021	Dec. 31, 2020
Financial Assets:
Financial Assets	$ 451,228,622	$ 374,266,941
Financial Liabilities:
Financial Liabilities	729,471,438	837,915,964
Loans and receivables [member]
Financial Assets:
Financial Assets	167,214,958	172,667,655
Loans and receivables [member] | Related parties [member]
Financial Assets:
Financial Assets	1,158,611	1,391,300
Fair value through profit or loss [member]
Financial Assets:
Financial Assets	10,130,806	20,928,335
Fair value through OCI [member]
Financial Assets:
Financial Assets	124,582,933	54,573,455
Equity investments at fair value through OCI and other short term investments [member]
Financial Assets:
Financial Assets	117,703,202	50,096,051
Equity investments at fair value through OCI and other short term investments [member] | Loans and receivables [member]
Financial Assets:
Financial Assets	15,026	62,940
Equity investments at fair value through OCI and other short term investments [member] | Fair value through OCI [member]
Financial Assets:
Financial Assets	117,688,176	50,033,111
Accounts receivable from subscribers distributors contractual assets and other net [member] | Loans and receivables [member]
Financial Assets:
Financial Assets	166,041,321	171,213,415
Financial instruments, class [member]
Financial Liabilities:
Financial Liabilities	10,130,806	14,230,249
Financial instruments, class [member] | Fair value through profit or loss [member]
Financial Assets:
Financial Assets	10,130,806	20,928,335
Liability Related to Right of Use of Assets [Member]
Financial Liabilities:
Financial Liabilities	98,654,225	109,327,241
Liability Related to Right of Use of Assets [Member] | Loans and receivables [member]
Financial Liabilities:
Financial Liabilities		109,327,241
Total Current Assets [Member] | Loans and receivables [member]
Financial Assets:
Financial Assets	167,214,958
Total Current Assets [Member] | Fair value through profit or loss [member]
Financial Assets:
Financial Assets	10,130,806
Total Current Assets [Member] | Fair value through OCI [member]
Financial Assets:
Financial Assets	117,688,176	50,033,111
Debt Instruments At Fair Value Through OCI [Member] | Fair value through profit or loss [member]
Financial Assets:
Financial Assets		4,540,344
Debt Instruments At Fair Value Through OCI [Member] | Fair value through OCI [member]
Financial Assets:
Financial Assets	6,894,757
Loans and receivables [member]
Financial Liabilities:
Financial Liabilities	868,243,015	928,705,585
Loans and receivables [member] | Related parties [member]
Financial Liabilities:
Financial Liabilities	4,216,882	3,999,916
Loans and receivables [member] | Debt [Member]
Financial Liabilities:
Financial Liabilities	564,030,102	628,382,956
Loans and receivables [member] | Accounts payable [Member]
Financial Liabilities:
Financial Liabilities	201,341,806	186,995,472
Loans and receivables [member] | Liability Related to Right of Use of Assets [Member]
Financial Liabilities:
Financial Liabilities	98,654,225
Loans and receivables [member] | Equity investments at fair value through OCI [Member]
Financial Assets:
Financial Assets		0
Loans and receivables [member] | Total Current Assets [Member]
Financial Assets:
Financial Assets		172,667,655
Fair value through profit or loss [Member]
Financial Liabilities:
Financial Liabilities	10,034,508	14,230,249
Fair value through profit or loss [Member] | Financial instruments, class [member]
Financial Liabilities:
Financial Liabilities	$ 10,034,508
Fair value through profit or loss [Member] | Total Current Assets [Member]
Financial Assets:
Financial Assets		$ 20,928,335

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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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