Segmental information - Geographical analysis (Details) - USD ($) $ in Millions	6 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Disclosure of geographical areas [line items]
Sales	$ 15,176	$ 15,181
United States
Disclosure of geographical areas [line items]
Sales	4,171	4,158
India
Disclosure of geographical areas [line items]
Sales	1,744	1,687
Great Britain
Disclosure of geographical areas [line items]
Sales	1,622	1,571
Rest of World
Disclosure of geographical areas [line items]
Sales	$ 7,639	$ 7,765

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details