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Financial instruments - Schedule of financial assets and liabilities measured at fair value (Details) - USD ($) $ in Millions	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Valuation techniques based on observable market input (Level 2)
Disclosure of detailed information about financial instruments [line items]
Derivative assets	$ 703	$ 748	$ 820
Derivative liabilities	(440)	(556)	(663)
Financial assets/(liabilities)	263	192	157
Valuation techniques based on unobservable market input (Level 3)
Disclosure of detailed information about financial instruments [line items]
Financial assets/(liabilities)	(318)	(416)	(482)
Financial assets - other	281	249	208
Financial liabilities - other	$ (599)	$ (665)	$ (690)

X

- Definition

Financial assets liabilities at fair value.

+ References

No definition available.

+ Details

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X

- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

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- Definition

The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

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- Definition

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.

+ References

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- Definition

The amount of financial assets that the entity does not separately disclose in the same statement or note. [Refer: Financial assets]

+ References

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- Definition

The amount of financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Financial liabilities]

+ References

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