Revenue Recognition - Disaggregation of Revenue From Contracts With Customers (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales		$ 1,434.8	$ 1,213.2	$ 1,130.8
Rental income
Disaggregation of Revenue [Line Items]
Net sales		53.1	44.7	36.6
Environmental Solutions
Disaggregation of Revenue [Line Items]
Net sales		1,190.6	1,004.0	915.8
Environmental Solutions | Vehicles and equipment
Disaggregation of Revenue [Line Items]
Net sales	[1]	927.9	764.3	719.3
Environmental Solutions | Parts
Disaggregation of Revenue [Line Items]
Net sales		173.7	150.3	129.4
Environmental Solutions | Rental income
Disaggregation of Revenue [Line Items]
Net sales	[2]	53.1	44.7	36.6
Environmental Solutions | Other
Disaggregation of Revenue [Line Items]
Net sales	[3]	35.9	44.7	30.5
Safety And Security Systems
Disaggregation of Revenue [Line Items]
Net sales		244.2	209.2	215.0
Safety And Security Systems | Public safety and security equipment
Disaggregation of Revenue [Line Items]
Net sales		149.1	126.1	132.6
Safety And Security Systems | Industrial signaling equipment
Disaggregation of Revenue [Line Items]
Net sales		62.1	53.9	50.8
Safety And Security Systems | Warning systems
Disaggregation of Revenue [Line Items]
Net sales		$ 33.0	$ 29.2	$ 31.6

[1] Includes net sales from the sale of new and used vehicles and equipment, including sales of rental equipment.

[2] Represents revenues from vehicle and equipment lease arrangements with customers, recognized in accordance with Topic 842.

[3] Primarily includes revenues from services such as maintenance and repair work and the sale of extended warranty contracts.