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Goodwill and intangible assets - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Goodwill [Roll Forward]      
Balance, beginning of the period $ 153 $ 148 $ 148
Effect of exchange rates changes 7   5
Balance, end of the period 160   153
Brazil      
Goodwill [Roll Forward]      
Balance, beginning of the period 60 56 56
Effect of exchange rates changes 1   4
Balance, end of the period 61   60
Argentina      
Goodwill [Roll Forward]      
Balance, beginning of the period 10 10 10
Effect of exchange rates changes 0 0  
Balance, end of the period 10   10
Mexico      
Goodwill [Roll Forward]      
Balance, beginning of the period 39 37 37
Effect of exchange rates changes 3   2
Balance, end of the period 42   39
Chile      
Goodwill [Roll Forward]      
Balance, beginning of the period 37 37 37
Effect of exchange rates changes 3   0
Balance, end of the period 40   37
Colombia      
Goodwill [Roll Forward]      
Balance, beginning of the period 5 6 6
Effect of exchange rates changes 0 (1)  
Balance, end of the period 5   5
Other Countries      
Goodwill [Roll Forward]      
Balance, beginning of the period 2 2 2
Effect of exchange rates changes 0 $ 0  
Balance, end of the period $ 2   $ 2