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Net borrowings - Maturity of gross borrowings before derivative financial instruments (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Jun. 30, 2023
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Disclosure of detailed information about borrowings [line items] |  |
Total borrowings before derivative financial instruments | $ 21,501 | $ 20,791
Within one year |  |
Disclosure of detailed information about borrowings [line items] |  |
Total borrowings before derivative financial instruments | 2,885 | 2,142
Between one and three years |  |
Disclosure of detailed information about borrowings [line items] |  |
Total borrowings before derivative financial instruments | 4,873 | 4,437
Between three and five years |  |
Disclosure of detailed information about borrowings [line items] |  |
Total borrowings before derivative financial instruments | 4,222 | 3,620
Beyond five years |  |
Disclosure of detailed information about borrowings [line items] |  |
Total borrowings before derivative financial instruments | $ 9,521 | $ 10,592

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