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Revenue recognition - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with customer, liability, revenue recognized $ 122.5 $ 92.4 $ 187.4 $ 127.4
Remaining performance obligation, amount $ 433.7   $ 433.7  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligation, percentage 69.00%   69.00%  
Revenue, remaining performance obligation, period 12 months   12 months  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligation, percentage 31.00%   31.00%  
Revenue, remaining performance obligation, period