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Investments Accounted for Using the Equity Method - Summary of Financial Information of Significant Equity Accounted Investments (Parenthetical) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2016
Disclosure of significant investments in associates and joint ventures [line items]        
Cash and cash equivalents $ 17,236 $ 15,246 $ 13,426  
Investment 1,420 1,742 2,585  
Net finance costs (969) (1,223) (858)  
Depreciation and amortisation 5,683 5,084 4,667  
Interest income 81 67 334  
Interest expense 1,050 1,290 1,192  
Income tax (expense)/benefit (10,737) (10,616) (4,197)  
Samarco Mineracao S.A. [member]        
Disclosure of significant investments in associates and joint ventures [line items]        
Cash and cash equivalents 106 134    
Current financial liabilities (excluding trade and other payables and provisions) 6,837 6,567    
Investment       $ 0
Share of loss       (655)
Impairment       (525)
Additional share of loss (5,326)      
Loss from funding provided to Samarco (4,539)      
Net finance costs (787)      
Depreciation and amortisation 205 154 84  
Interest income 19 1 16  
Interest expense 628 492 588  
Income tax (expense)/benefit (7) 303 $ 256  
Samarco Mineracao S.A. [member] | Working Capital Funding [Member]        
Disclosure of significant investments in associates and joint ventures [line items]        
Additional cumulative impairment losses       $ (516)
Individually immaterial, associates [member]        
Disclosure of significant investments in associates and joint ventures [line items]        
Unrecognised share of profits (losses) 16 40    
Cumulative losses 217 233    
Investment $ 114 $ 380