Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 497.2
Goodwill adjustment	4.9
Goodwill from business acquisition	88.2
Goodwill, Ending Balance	590.3
Home Comfort Solutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	87.0
Goodwill adjustment	(0.8)
Goodwill from business acquisition	88.2
Goodwill, Ending Balance	174.4
Building Climate Solutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	410.2
Goodwill adjustment	5.7
Goodwill from business acquisition	0.0
Goodwill, Ending Balance	$ 415.9

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