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Discontinued Operations - Summary of Cash Flows from Discontinued Operations (Parenthetical) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure of analysis of single amount of discontinued operations [line items]      
Proceeds from sale of assets $ 444 $ 221 $ 158
Net repayment of interest bearing liabilities 3,289 3,358 8,357
Other outflows from investing activities $ (377) (271) (257)
Discontinued operations [member]      
Disclosure of analysis of single amount of discontinued operations [line items]      
Proceeds from sale of assets   151 39
Net repayment of interest bearing liabilities   33 38
Purchases of property, plant and equipment and capitalised exploration   1,144 1,020
Proceeds from sale of investment in subsidiaries associates joint operations and joint venture net of cash acquired   91 480
Other outflows from investing activities   $ 2 $ 59