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Schedule of borrowings (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
IfrsStatementLineItems [Line Items]        
Non current borrowings $ 1,359 $ 1,372    
Current borrowings 79 242    
Borrowing 1,438 1,614 $ 1,947 $ 2,177
Financial Borrowings [Member]        
IfrsStatementLineItems [Line Items]        
Non current borrowings 58 75    
Current borrowings 29 88    
Corporate Bonds [Member]        
IfrsStatementLineItems [Line Items]        
Non current borrowings 1,301 1,297    
Current borrowings 39 117    
Bank Overdraft [Member]        
IfrsStatementLineItems [Line Items]        
Current borrowings $ 11 $ 37