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Schedule of changes in provisions (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Provisions For Contingencies [Member]      
IfrsStatementLineItems [Line Items]      
Provisions, beginning $ 103 $ 139 $ 142
Increases 16 21 41
Decreases (1) (10)
Reversal of unused amounts (13) [1] (8) (13)
Provisions, ending 106 103 139
Gain on monetary position net   (15) (17)
Reclasification liabilities associated to assets classified as held for sale   (33)  
Exchange differences on translation     (4)
Asset Retirement Obligation [Member]      
IfrsStatementLineItems [Line Items]      
Provisions, beginning 21 22 22
Increases 3 2 3
Decreases (1)
Reversal of unused amounts (2) (3) (3)
Provisions, ending 21 21 22
Gain on monetary position net  
Reclasification liabilities associated to assets classified as held for sale    
Exchange differences on translation    
Environmental Remediations [Member]      
IfrsStatementLineItems [Line Items]      
Provisions, beginning 3 3 5
Increases 15
Decreases (2)
Reversal of unused amounts
Provisions, ending $ 18 3 3
Gain on monetary position net  
Reclasification liabilities associated to assets classified as held for sale    
Exchange differences on translation    
[1] Includes recovery of US$ 12.5 million related to waive the timely granted dispatch of the PEPE IV Wind Farm (see Note 2.1.2.3).