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Financial Assets and Liabilities - Summary of changes in liabilities arising from financing activities (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of reconciliation of liabilities arising from financing activities [abstract]
Beginning balance	$ 697,884,899	$ 707,801,403
Cash flow	(34,050,923)	(27,433,489)
Foreign currency exchange and other	(24,911,523)	17,516,985
Ending balance	$ 638,922,453	$ 697,884,899

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- References

No definition available.

+ Details

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- Definition

The increase (decrease) in liabilities arising from financing activities resulting from the effect of changes in foreign exchange rates. [Refer: Liabilities arising from financing activities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 44B
-Subparagraph c
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-URIDate 2018-03-16

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- Definition

The increase (decrease) in liabilities arising from financing activities resulting from financing cash flows. [Refer: Cash flows from (used in) financing activities; Liabilities arising from financing activities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
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- Definition

The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities]

+ References

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