XML 222 R166.htm IDEA: XBRL DOCUMENT v3.22.1
Provision for de-characterization of dam structures and asset retirement obligations - Provision changes during the year (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Provisions.    
Balance at the beginning $ 4,522  
Balance at the end 4,580 $ 4,522
Current 1,045 1,664
Non-current 3,419 4,113
Liabilities 4,580 4,522
Letters of credit and surety bonds issued 605 651
Asset retirement obligations and environmental obligations    
Provisions.    
Balance at the beginning 4,522  
Balance at the end 4,580 4,522
Current 170 201
Non-current 4,410 4,321
Liabilities 4,580 4,522
Asset retirement obligations and environmental obligations | Canada    
Provisions.    
Balance at the beginning 2,491  
Balance at the end 2,727 2,491
Liabilities 2,727 2,491
Asset retirement obligations and environmental obligations | Brazil    
Provisions.    
Balance at the beginning 1,530  
Balance at the end 1,398 1,530
Liabilities 1,398 1,530
Asset retirement obligations    
Provisions.    
Balance at the beginning 4,220 3,960
Adjustment to present value 110 27
Disbursements (88) (45)
Revisions on projected cash flows 178 509
Transfer to assets held for sale (50)  
Translation adjustment (87) (231)
Balance at the end 4,283 4,220
Liabilities 4,283 4,220
Amount capitalized as part of property, plant, and equipment 57  
Asset retirement obligations | Base metals    
Provisions.    
Decommissioning of water structure of base metals operations   312
Asset retirement obligations | Base metals | Canada    
Provisions.    
Decommissioning of water structure of base metals operations 121 151
Asset retirement obligations | Iron ore | Brazil    
Provisions.    
Decommissioning of water structure of base metals operations   161
Environmental obligations    
Provisions.    
Balance at the beginning 302 389
Adjustment to present value 19 6
Disbursements (57) (61)
Revisions on projected cash flows 49 48
Translation adjustment (16) (80)
Balance at the end 297 302
Liabilities $ 297 $ 302