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, 2023	Dec. 31, 2022
Assets:
Financial Assets	$ 303,447,939	$ 344,892,278
Total current assets	75,201,661	91,030,791
Total non current assets	228,246,278	253,861,487
Liabilities:
Financial Liabilities	633,107,286	648,038,187
Debt [member]
Liabilities:
Financial Liabilities	490,041,751	488,558,030
Financial instruments, class [member]
Assets:
Financial Assets	1,446,034	2,602,680
Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	73,755,627	88,428,111
Pension plan assets [member]
Assets:
Non current financial assets	204,092,587	208,526,619
Derivative Financial Instruments [Member]
Liabilities:
Financial Liabilities	17,896,379	25,331,346
Liability Related to Right of Use of Assets [Member]
Liabilities:
Financial Liabilities	125,169,156	134,148,811
Revalued Of Assets [Member]
Assets:
Non current financial assets	9,239,279	38,353,719
Debt Instruments At Fair Value Through OCI [Member]
Assets:
Non current financial assets	14,914,412	6,981,149
Level 1 [member]
Assets:
Financial Assets	266,212,454	281,257,799
Total current assets	70,231,744	88,428,111
Total non current assets	195,980,710	192,829,688
Liabilities:
Financial Liabilities	507,480,088	505,858,206
Level 1 [member] \| Debt [member]
Liabilities:
Financial Liabilities	382,310,932	371,709,395
Level 1 [member] \| Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	70,231,744	88,428,111
Level 1 [member] \| Pension plan assets [member]
Assets:
Non current financial assets	191,442,079	192,829,688
Level 1 [member] \| Liability Related to Right of Use of Assets [Member]
Liabilities:
Financial Liabilities	125,169,156	134,148,811
Level 1 [member] \| Debt Instruments At Fair Value Through OCI [Member]
Assets:
Non current financial assets	4,538,631
Level 2 [member]
Assets:
Financial Assets	24,438,760	25,241,490
Total current assets	1,446,034	2,602,680
Total non current assets	22,992,726	22,638,810
Liabilities:
Financial Liabilities	125,627,198	142,179,981
Level 2 [member] \| Debt [member]
Liabilities:
Financial Liabilities	107,730,819	116,848,635
Level 2 [member] \| Financial instruments, class [member]
Assets:
Financial Assets	1,446,034	2,602,680
Level 2 [member] \| Pension plan assets [member]
Assets:
Non current financial assets	12,616,945	15,657,661
Level 2 [member] \| Derivative Financial Instruments [Member]
Liabilities:
Financial Liabilities	17,896,379	25,331,346
Level 2 [member] \| Debt Instruments At Fair Value Through OCI [Member]
Assets:
Non current financial assets	10,375,781	6,981,149
Level 3 [member]
Assets:
Financial Assets	12,796,725	38,392,989
Total current assets	3,523,883	0
Total non current assets	9,272,842	38,392,989
Level 3 [member] \| Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	3,523,883
Level 3 [member] \| Pension plan assets [member]
Assets:
Non current financial assets	33,563	39,270
Level 3 [member] \| Revalued Of Assets [Member]
Assets:
Non current financial assets	$ 9,239,279	$ 38,353,719

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

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