Financial Assets and Liabilities - Summary of Fair Value for Financial Assets (Excluding Cash and Cash Equivalents) and Financial Liabilities (Detail) - MXN ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets:
Financial Assets	$ 344,892,278	$ 451,228,622
Current derivative financial assets	337,911,129	444,333,865
Liabilities:
Financial Liabilities	648,038,187	729,471,438
Debt [member]
Liabilities:
Financial Liabilities	488,558,030	620,782,705
Financial instruments, class [member]
Assets:
Financial Assets	2,602,680	10,130,806
Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	88,428,111	117,703,202
Pension plan assets [member]
Assets:
Financial Assets	208,526,619	218,327,182
Derivative Financial Instruments [Member]
Liabilities:
Financial Liabilities	25,331,346	10,034,508
Liability Related to Right of Use of Assets [Member]
Liabilities:
Financial Liabilities	134,148,811	98,654,225
Revalued Of Assets [Member]
Assets:
Financial Assets	38,353,719	98,172,675
Debt Instruments At Fair Value Through OCI [Member]
Assets:
Equity investments at fair value through OCI and other short-term investments (Note 4)	6,981,149	6,894,757
Level 1 [member]
Assets:
Financial Assets	281,257,799	313,836,780
Current derivative financial assets	281,257,799	313,836,780
Liabilities:
Financial Liabilities	505,858,206	539,314,390
Level 1 [member] \| Debt [member]
Liabilities:
Financial Liabilities	371,709,395	440,660,165
Level 1 [member] \| Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	88,428,111	117,688,176
Level 1 [member] \| Pension plan assets [member]
Assets:
Financial Assets	192,829,688	196,148,604
Level 1 [member] \| Liability Related to Right of Use of Assets [Member]
Liabilities:
Financial Liabilities	134,148,811	98,654,225
Level 2 [member]
Assets:
Financial Assets	25,241,490	39,164,727
Current derivative financial assets	18,260,341	32,269,970
Liabilities:
Financial Liabilities	142,179,981	190,157,048
Level 2 [member] \| Debt [member]
Liabilities:
Financial Liabilities	116,848,635	180,122,540
Level 2 [member] \| Financial instruments, class [member]
Assets:
Financial Assets	2,602,680	10,130,806
Level 2 [member] \| Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets		15,026
Level 2 [member] \| Pension plan assets [member]
Assets:
Financial Assets	15,657,661	22,124,138
Level 2 [member] \| Derivative Financial Instruments [Member]
Liabilities:
Financial Liabilities	25,331,346	10,034,508
Level 2 [member] \| Debt Instruments At Fair Value Through OCI [Member]
Assets:
Equity investments at fair value through OCI and other short-term investments (Note 4)	6,981,149	6,894,757
Level 3 [member]
Assets:
Financial Assets	38,392,989	98,227,115
Current derivative financial assets	38,392,989	98,227,115
Level 3 [member] \| Pension plan assets [member]
Assets:
Financial Assets	39,270	54,440
Level 3 [member] \| Revalued Of Assets [Member]
Assets:
Financial Assets	$ 38,353,719	$ 98,172,675

The amount of current derivative financial assets. [Refer: Derivative financial assets]

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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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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) 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 deliver 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, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are 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. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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