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Revenue Recognition (Detail) $ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 MXN ($)	Sep. 30, 2018 MXN ($)
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue sale of products	$ 7,120	$ 140,571	$ 130,252
Services rendered		314	276
Other operating revenues		1,619	49
Revenue from contracts with customers		$ 142,504	$ 130,577

X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2019-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

The amount of revenue arising from the rendering of services. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2019-01-01
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- Definition

The amount of revenue arising from the sale of goods. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Other operating revenues.

+ References

No definition available.

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