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Finance income and charges - Narrative (Details)	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
TURKEY
Disclosure of geographical areas [line items]
Movement in Price Index in hyperinflationary economy	38.00%	15.00%
Venezuela
Disclosure of geographical areas [line items]
Movement in Price Index in hyperinflationary economy	54.00%	105.00%
GHANA
Disclosure of geographical areas [line items]
Movement in Price Index in hyperinflationary economy	9.00%

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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.

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