v3.25.2
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, 2025
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2016
Disclosure of significant investments in associates and joint ventures [line items]        
Cash and cash equivalents $ 11,894 $ 12,501 $ 12,428  
Investment 4,107 1,662 1,620  
Depreciation and amortisation 5,540 5,295 5,061  
Interest income 660 709 529  
Interest expense 1,771 2,198 2,060  
Income tax benefit / (expense) (7,210) (6,447) (7,077)  
Other finance income 57 0 0  
Samarco Mineracao S.A. [member]        
Disclosure of significant investments in associates and joint ventures [line items]        
Cash and cash equivalents 419 251    
Current financial liabilities (excluding trade and other payables and provisions) 0 0    
Non current Liabilities 4,625 4,261    
Investment       $ 0
Impairment       525
Depreciation and amortisation 165 165 144  
Interest income 54 43 42  
Interest expense 1,686 807 1,384  
Income tax benefit / (expense) (623) 999 (213)  
Other finance income 0 1,756 $ 0  
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
Vicuna [Member]        
Disclosure of significant investments in associates and joint ventures [line items]        
Cash and cash equivalents 53      
Current financial liabilities (excluding trade and other payables and provisions) 1      
Non current Liabilities 3      
Depreciation and amortisation 1      
Interest income 0      
Interest expense 0      
Income tax benefit / (expense) 0      
Individually immaterial, associates [member]        
Disclosure of significant investments in associates and joint ventures [line items]        
Unrecognised share of profits (losses) 72 41    
Cumulative losses 28 100    
Investment $ 90 $ 164