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Impairment and restructuring charges - Schedule Restructuring and Related Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | $ 17.1 | $ (0.1) | $ 16.6 | $ 9.6
R&D |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 5.4 | (0.2) | 5.3 | 2.5
Employee transition |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 0.2 | 0.0 | 0.2 | 0.3
Severance payments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 14.8 | 0.1 | 14.3 | 8.8
Employee benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 2.1 | (0.2) | 2.1 | 0.5
Total restructuring costs by segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 3.1 | 0.0 | 2.8 | 2.0
SG&A |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 8.6 | 0.1 | 8.5 | 5.1
Commercial Products | Total restructuring costs by segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 0.0 | 0.0 | 0.0 | 0.0
MCM Products | Total restructuring costs by segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | 2.7 | 0.0 | 2.6 | 2.0
Services | Total restructuring costs by segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment restructuring costs | $ 0.4 | $ 0.0 | $ 0.2 | $ 0.0

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