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Investments in Associates - Summarized Financial Information to Carrying Amount of Company's Interests in Material Associates (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
AB InBev Efes [member]
Disclosure of associates [line items]
Beginning balance	$ 1,132	$ 1,159
Acquisitions		0
Dividends received	0	(14)
Share of results of associates	(19)	(10)
Ending balance	1,113	1,135
Castel [member]
Disclosure of associates [line items]
Beginning balance	3,239	3,279
Effect of movements in foreign exchange	(10)	(18)
Dividends received	(19)	(88)
Share of results of associates	38	56
Ending balance	3,248	3,229
Efes [member]
Disclosure of associates [line items]
Beginning balance	451	479
Effect of movements in foreign exchange	(60)	(39)
Dividends received	0	(15)
Share of results of associates	4	(5)
Ending balance	$ 395	$ 420

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- Definition

Effect of movements in foreign exchange.

+ References

No definition available.

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- Definition

Share of results of associates.

+ References

No definition available.

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- Definition

The increase in investment property resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Investment property]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2019-01-01
-Paragraph 76
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2019-en-r&anchor=para_76_b&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 40
-IssueDate 2019-01-01
-Paragraph 79
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- 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.

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- Definition

The amount of dividends received.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph B12
-Subparagraph a
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- Definition

The amount of investments in associates in an entity's separate financial statements. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2019-01-01
-Paragraph 10
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