Segment Information - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from External Customer [Line Items]
Total revenues	$ 925.4	$ 860.8	$ 800.9
Medical
Revenue from External Customer [Line Items]
Total revenues	310.8	299.7	284.5
Nuclear & Safety
Revenue from External Customer [Line Items]
Total revenues	614.6	561.1	516.4
Cancer care | Medical
Revenue from External Customer [Line Items]
Total revenues	237.0	228.1	215.9
Other | Medical
Revenue from External Customer [Line Items]
Total revenues	73.8	71.6	68.6
Nuclear | Nuclear & Safety
Revenue from External Customer [Line Items]
Total revenues	374.6	316.6	291.8
Labs and research | Nuclear & Safety
Revenue from External Customer [Line Items]
Total revenues	122.2	131.7	122.9
Other | Nuclear & Safety
Revenue from External Customer [Line Items]
Total revenues	$ 117.8	$ 112.8	$ 101.7