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Financial Instruments - Net Effects Of Derivative Financial Instruments That Did Not Met Hedging Criteria (Details) - Derivative Contract Not Met Hedging Criteria - Market value gain on financial instruments - MXN ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Embedded Derivative
Disclosure of detailed information about hedges [line items]
Net gains (losses) on change in fair value of derivatives			$ 4
Cross-currency swaps
Disclosure of detailed information about hedges [line items]
Net gains (losses) on change in fair value of derivatives	$ 80	$ (212)	$ (293)

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 85
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-URIDate 2021-03-24

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