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Special Charges, Net - Special Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Special charges, net
Employee termination costs	$ 2.4	$ 0.8	$ 0.1
Non-cash asset write-downs	0.9	0.0	0.3
Total Special Charges	3.6	0.8	0.4
Operating Segments | External revenues
Special charges, net
Non-cash asset write-downs	0.7	0.0	0.0
Total Special Charges	1.9	0.1	0.1
Operating Segments | Detection and Measurement reportable segment
Special charges, net
Non-cash asset write-downs	0.2	0.0	0.3
Total Special Charges	1.7	0.7	0.3
Corporate
Special charges, net
Non-cash asset write-downs	0.0	0.0	0.0
Total Special Charges	0.0	0.0	0.0
Employee Termination Costs
Special charges, net
Employee termination costs	2.4	0.8	0.1
Employee Termination Costs | Operating Segments | External revenues
Special charges, net
Employee termination costs	1.2	0.1	0.1
Employee Termination Costs | Operating Segments | Detection and Measurement reportable segment
Special charges, net
Employee termination costs	1.2	0.7	0.0
Employee Termination Costs | Corporate
Special charges, net
Employee termination costs	0.0	0.0	0.0
Facility Consolidation Costs
Special charges, net
Facility consolidation costs	0.3	0.0	0.0
Facility Consolidation Costs	0.3	0.0	0.0
Facility Consolidation Costs | Operating Segments | External revenues
Special charges, net
Facility Consolidation Costs	0.0	0.0	0.0
Facility Consolidation Costs | Operating Segments | Detection and Measurement reportable segment
Special charges, net
Facility Consolidation Costs	0.3	0.0	0.0
Facility Consolidation Costs | Corporate
Special charges, net
Facility Consolidation Costs	$ 0.0	$ 0.0	$ 0.0

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- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with an exit from business activities or restructuring pursuant to a duly authorized plan, excluding asset retirement obligations. Such costs include charges associated with employee terminations, lease terminations, asset impairments, etc.

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