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Investments Accounted for Using the Equity Method - Summary of Movements of Investments Accounted for using the Equity Method (Parenthetical) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Disclosure of significant investments in associates and joint ventures [line items]      
Loss from equity accounted investments, related impairments and expenses $ (19) $ (915) $ (508)
Fair value change on forward exchange derivatives 29 (87) (393)
Dividends received from investments accounted for using equity method, classified as investing activities 787    
Discontinued operations [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Loss from equity accounted investments, related impairments and expenses (4) (6) (4)
Dividends received from investments accounted for using equity method, classified as investing activities 10 $ 10 $ 12
Samarco dam failure [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Fair value change on forward exchange derivatives (81)    
Samarco germano dam decommissioning [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Change in estimate 56    
Exchange translation 12    
Samarco Germano dam decommissioning 68    
Joint ventures [member] | Samarco dam failure [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Loss from equity accounted investments, related impairments and expenses (676)    
Samarco dam failure provision (663)    
Change in estimate (747)    
Exchange translation $ 84