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Provisions (including post-retirement benefits) - Undiscounted Close-Down and Environmental Restoration Obligation (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other provisions [Line Items]        
Undiscounted close-down and environmental restoration cash flows   $ 18,775 $ 17,400  
Impact of discounting   (4,233) (4,065)  
Non-current provisions   15,930 15,936  
Total closure obligation   $ 14,542 $ 13,335  
Remaining lives of operations and infrastructure   one to over 50 years    
Remaining lives of operations and infrastructure present closure obligation   16 years 17 years  
Provisions   $ 18,036 $ 17,665 $ 15,103
Risk free interest rate on provisions 1.50% 1.50%   2.00%
Australia        
Disclosure of other provisions [Line Items]        
Total closure obligation   $ 7,605 7,076  
US        
Disclosure of other provisions [Line Items]        
Total closure obligation   4,057 3,819  
Canada        
Disclosure of other provisions [Line Items]        
Total closure obligation   1,662 1,482  
Rest of World        
Disclosure of other provisions [Line Items]        
Total closure obligation   1,218 958  
Bottom of range        
Disclosure of other provisions [Line Items]        
Provisions     $ 2,800  
Risk free interest rate on provisions     1.00%  
Top of range        
Disclosure of other provisions [Line Items]        
Provisions     $ 1,300  
Risk free interest rate on provisions     3.00%  
Other employee entitlements        
Disclosure of other provisions [Line Items]        
Provision for long service leave   272 $ 283  
Provision for redundancy and severance payments   60 62  
Non-current provisions   77    
Provisions   394 419  
Close down and restoration/ environmental        
Disclosure of other provisions [Line Items]        
Non-current provisions   13,519    
Provisions   14,542 13,335  
Close down and restoration/ environmental | Bottom of range        
Disclosure of other provisions [Line Items]        
Provision capitalised to property, plant and equipment     2,500  
Provision charged to the income statement     300  
Close down and restoration/ environmental | Top of range        
Disclosure of other provisions [Line Items]        
Provision capitalised to property, plant and equipment     1,200  
Provision charged to the income statement     100  
Decommissioning, decontamination and demolition        
Disclosure of other provisions [Line Items]        
Total closure obligation   3,343 3,131  
Closure and rehabilitation earthworks        
Disclosure of other provisions [Line Items]        
Total closure obligation   4,125 4,223  
Long-term water management costs        
Disclosure of other provisions [Line Items]        
Total closure obligation   967 966  
Post closure monitoring and maintenance        
Disclosure of other provisions [Line Items]        
Total closure obligation   1,676 1,318  
Indirect costs, owners costs and contingency        
Disclosure of other provisions [Line Items]        
Total closure obligation   4,431 3,697  
Operating sites        
Disclosure of other provisions [Line Items]        
Total closure obligation   10,727 10,736  
Non-operating sites        
Disclosure of other provisions [Line Items]        
Total closure obligation   3,815 2,599  
Due within 1 year        
Disclosure of other provisions [Line Items]        
Undiscounted close-down and environmental restoration cash flows   1,023 776  
Between 1 and 3 years        
Disclosure of other provisions [Line Items]        
Undiscounted close-down and environmental restoration cash flows   1,652 1,203  
Between 3 and 5 years        
Disclosure of other provisions [Line Items]        
Undiscounted close-down and environmental restoration cash flows   1,680 1,433  
More than 5 years        
Disclosure of other provisions [Line Items]        
Undiscounted close-down and environmental restoration cash flows   14,420 13,988  
More than 5 years | Close down and restoration/ environmental        
Disclosure of other provisions [Line Items]        
Non-current provisions   1,059 937  
Between 1 and 5 years | Close down and restoration/ environmental        
Disclosure of other provisions [Line Items]        
Non-current provisions   645 468  
Diavik Diamond Mines (2012) Inc. | Close down and restoration/ environmental        
Disclosure of other provisions [Line Items]        
Provisions relating to insurance recoveries and other financial assets held   $ 410 $ 574