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Performance B.4.1. Share-based compensation - Narrative (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
plan
$ / shares
Dec. 31, 2022
USD ($)
Dec. 31, 2021
Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of plans | plan 2      
Deferred share plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting period       3 years
2020 incentive plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting period 3 years      
Compound annual growth rate term 3 years      
Performance share plan 2021 (Relative TSR)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Social and governance metric performance conditions percent 0.10      
Service revenue performance conditions percent 30.00% 30.00% 15.00%  
Operating cash flow after leases performance conditions percent 50.00% 50.00% 30.00%  
Cumulative achievement for cumulative targets, period   3 years    
Measurement period   3 years    
Performance share plan 2021 (Relative TSR) | Restricted Stock Units        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting period 3 years      
Restricted stock units performance conditions percent     0.35  
Performance share plan 2021 (Relative TSR) | Relative TSR        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Service revenue performance conditions percent 10.00% 20.00% 20.00%  
Measurement period   3 years    
Number of trading days   10 days    
Performance share plan 2021 (Relative TSR) | Market Stock Units (MSU) | Executive Officer        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Target share price (in dollars per share) | $ / shares $ 30.75      
Payment threshold of target award value 150.00%      
Financial liabilities, at fair value | $ $ 1,000 $ 2,000    
Gains (losses) on financial liabilities at fair value through profit or loss | $ $ (1,000) $ 1,000    
Tranche One | Deferred share plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting percentage       30.00%
Tranche One | 2020 incentive plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting percentage 25.00%      
Tranche Three | Deferred share plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting percentage       40.00%
Tranche Three | 2020 incentive plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting percentage 50.00%      
Tranche Two | 2020 incentive plans        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting percentage 25.00%      
Tranche 2022 | Performance share plan 2021 (Relative TSR) | Market Stock Units (MSU) | Executive Officer        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share price at inception (in dollars per share) | $ / shares $ 33.83      
Share price appreciation percent 10.00%      
Value determination, trading day average share price period 30 days      
Cash payments | $ $ 1,150      
Tranche 2023 | Performance share plan 2021 (Relative TSR) | Market Stock Units (MSU) | Executive Officer        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share price at inception (in dollars per share) | $ / shares $ 36.90      
Share price appreciation percent 20.00%      
Value determination, trading day average share price period 30 days