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Bonus Programs - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020 MXN ($)	Dec. 31, 2019 MXN ($)	Dec. 31, 2018 MXN ($)
Disclosure of terms and conditions of share-based payment arrangement [line items]
Annual bonus percentage	50.00%
Bonus expense	$ 747	$ 940	$ 659
Vesting percentage	33.00%
Number of options granted	0	0	0
Vesting period	3 years
The total expense recognized for the period arising from share-based payment transactions	$ 190	$ 188	$ 157
Share based payments	$ 192	$ 234
FEMSA
Disclosure of terms and conditions of share-based payment arrangement [line items]
Annual bonus percentage	50.00%
Number of options granted	2,083,809,000,000

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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- Definition

The amount of expense from share-based payment transactions with employees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
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- Definition

The number of share options granted in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2019-01-01
-Paragraph 45
-Subparagraph b
-Clause ii
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- Definition

Annual bonus percentage to purchase options

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- Definition

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- Definition

Options granted vesting percentage

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- Definition

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- Definition

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