Employee Benefit Plans - Components of Net Periodic Pension Expense/Benefit (Details) - Madison Industries IAQ Solutions Corporation - Pension Plan - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.1	$ 0.1
Interest cost	0.5	0.6
Expected return on plan assets	(0.5)	(0.6)
Net periodic pension expense (benefit)	0.1	0.1
International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0
Interest cost	0.4	0.4
Expected return on plan assets	(0.4)	(0.4)
Net periodic pension expense (benefit)	$ 0.0	$ 0.0