Business Combinations, Acquisitions, and Business Disposals - Narrative (Details) - USD ($) $ in Millions				12 Months Ended
	Dec. 01, 2025	Jul. 31, 2025	Apr. 03, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Business Combination, Separately Recognized Transaction [Line Items]
GAAP purchase consideration, net of cash acquired				$ 661.9	$ 1.0	$ 31.4
Proceeds from business disposal				0.0	2.5	$ 1.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Biodex Rehabilitation Business
Business Combination, Separately Recognized Transaction [Line Items]
Proceeds from business disposal			$ 1.0
Consideration receivable					$ 1.2
Certrec
Business Combination, Separately Recognized Transaction [Line Items]
Purchase consideration		$ 82.9
GAAP purchase consideration, net of cash acquired		80.6
Transaction costs				0.0
Certrec | Nuclear & Safety
Business Combination, Separately Recognized Transaction [Line Items]
Percentage of voting shares (as a percent)	100.00%
Purchase consideration		82.9
GAAP purchase consideration, net of cash acquired		$ 80.6
Paragon
Business Combination, Separately Recognized Transaction [Line Items]
Purchase consideration	$ 588.4
GAAP purchase consideration, net of cash acquired	$ 581.3
Transaction costs				$ 14.1
Paragon | Nuclear & Safety
Business Combination, Separately Recognized Transaction [Line Items]
Percentage of voting shares (as a percent)	100.00%
Purchase consideration	$ 588.4
GAAP purchase consideration, net of cash acquired	$ 581.3