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Segment information - Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenues:    
Revenue $ 222.2 $ 300.4
Cost of sales reportable segments:    
Cost of goods and services sold [1] 88.5 144.6
Segment, Reconciliation of Other Items from Segments to Consolidated [Abstract]    
Amortization of intangible assets (16.3) (16.2)
Changes in fair value of financial instruments 0.0 (0.5)
Research and development (15.1) (15.1)
Selling, general and administrative (52.4) (84.7)
Interest expense (14.7) (24.3)
Other, net 69.7 (3.4)
Income before income taxes 92.7 12.1
Restructuring costs (1.3) (0.5)
Operating Segments    
Revenues:    
Revenue 201.9 273.9
Cost of sales reportable segments:    
Cost of goods and services sold 73.7 113.9
Segment adjusted gross margin reportable segments: 128.2 160.0
Segment, Reconciliation of Other Items from Segments to Consolidated [Abstract]    
All other revenues less other costs of revenue 6.5 (3.8)
Amortization of intangible assets (16.3) (16.2)
Restructuring costs 0.8 0.1
Inventory step-up provision (1.8) 0.0
Changes in fair value of financial instruments 0.0 (0.5)
Research and development (15.1) (15.1)
Selling, general and administrative (52.4) (84.7)
Interest expense (14.7) (24.3)
Loss on assets held for sale (12.2) 0.0
Other, net 69.7 (3.4)
Income before income taxes 92.7 12.1
Restructuring costs (0.9) (0.3)
All other revenues    
Revenues:    
Revenue 20.3 26.5
Commercial Products | Operating Segments    
Revenues:    
Revenue 45.3 118.5
Cost of sales reportable segments:    
Cost of goods and services sold 24.5 52.1
Segment adjusted gross margin reportable segments: 20.8 66.4
MCM Products | Operating Segments    
Revenues:    
Revenue 156.6 155.4
Cost of sales reportable segments:    
Cost of goods and services sold 49.2 61.8
Segment adjusted gross margin reportable segments: 107.4 93.6
Segment, Reconciliation of Other Items from Segments to Consolidated [Abstract]    
Inventory step-up provision (1.8)  
Changes in fair value of financial instruments   (0.5)
Restructuring costs $ (0.8) $ (0.1)
[1]
(1) Exclusive of intangible asset amortization