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Post employment benefits - Balance sheet analysis of post employment plans (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
[1]
Disclosure of defined benefit plans [line items]      
Non-current assets $ 1,146 $ 1,210 [1] $ 1,878
Non-current liabilities (429) (471) [1] $ (486)
Surplus restriction 4 9  
Funded plans      
Disclosure of defined benefit plans [line items]      
Non-current assets 1,146 1,210  
Non-current liabilities (152) (167)  
Unfunded plans      
Disclosure of defined benefit plans [line items]      
Non-current liabilities $ (277) $ (304)  
[1] (1)  See pages 238-240 for an explanation under Accounting information and policies.