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Segment information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Depreciation:        
Total $ 10.1 $ 11.7 $ 34.0 $ 46.1
Other        
Depreciation:        
Total 3.1 0.9 10.6 3.5
Commercial Products | Operating Segments        
Depreciation:        
Total 0.0 0.0 0.0 0.3
MCM Products | Operating Segments        
Depreciation:        
Total 4.7 7.4 16.0 22.6
Services | Operating Segments        
Depreciation:        
Total $ 2.3 $ 3.4 $ 7.4 $ 19.7