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Assets and liabilities held for sale - Narrative (Details) - USD ($) $ in Millions			6 Months Ended
	Jan. 28, 2025	Sep. 30, 2024	Dec. 31, 2024	Jun. 11, 2024
Guinness Nigeria PLC (5)
Disclosure Of Assets and Liabilities Held For Sale [Line Items]
Consideration		$ 64
Disposal, percentage of interest disposed				58.02%
Guinness Ghana Breweries Plc
Disclosure Of Assets and Liabilities Held For Sale [Line Items]
Disposal, exchange loss that will be recycled to the income statement			$ 66
Guinness Ghana Breweries Plc | Disposal of major subsidiary [member]
Disclosure Of Assets and Liabilities Held For Sale [Line Items]
Consideration	$ 81

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- Definition

Disclosure Of Assets and Liabilities Held For Sale [Line Items]

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No definition available.

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- Definition

Disposal, Exchange Gain (Loss) Expected To Be Recycled To The Income Statement On Translation Of Foreign Operation

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- Definition

Disposal, percentage of interest disposed

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- Definition

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Total for all subsidiaries [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 40
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_40_a&doctype=Standard
-URIDate 2024-03-27

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