Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
Jun. 30, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 619.8
Goodwill	18.6
Translation adjustments	(1.6)
Goodwill, ending balance	636.8
Environmental Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	506.8
Goodwill	18.6
Translation adjustments	(0.5)
Goodwill, ending balance	524.9
Safety and Security Systems
Goodwill [Roll Forward]
Goodwill, beginning balance	113.0
Goodwill	0.0
Translation adjustments	(1.1)
Goodwill, ending balance	$ 111.9

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details