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Segment information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Depreciation:        
Total $ 16.8 $ 28.5 $ 34.4 $ 45.1
Other        
Depreciation:        
Total 0.9 1.0 2.6 2.4
Products        
Depreciation:        
Total 7.5 6.7 15.5 14.1
Services        
Depreciation:        
Total $ 8.4 $ 20.8 $ 16.3 $ 28.6