Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 220.0
Goodwill adjustment	0.0
Goodwill, Ending Balance	220.0
Home Comfort Solutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	26.1
Goodwill adjustment	0.0
Goodwill, Ending Balance	26.1
Building Climate Solutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	193.9
Goodwill adjustment	0.0
Goodwill, Ending Balance	$ 193.9