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Financial instruments and risk management - Schedule of average monthly net borrowings and effective interest rate (Details) - USD ($) $ in Millions	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Disclosure of average monthly borrowings and effective interest rate [line items]
Average monthly net borrowings	$ 21,017	$ 19,582	$ 17,107
Effective interest rate	4.30%	3.90%	2.70%
Weighted average
Disclosure of average monthly borrowings and effective interest rate [line items]
Average monthly net borrowings	$ 21,034	$ 18,362	$ 16,883

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- Definition

Disclosure of average monthly borrowings and effective interest rate.

+ References

No definition available.

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- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The interest rate on borrowings. [Refer: Borrowings]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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