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Revenue Recognition - Disaggregation of Revenue From Contracts With Customers (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | $ 474.2 |  | $ 446.4 |  | $ 1,389.5 | $ 1,274.3
U.S. |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 379.9 |  | 340.0 |  | 1,098.6 | 988.0
Canada |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 60.7 |  | 67.1 |  | 189.4 | 180.4
Europe/Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 33.6 |  | 39.3 |  | 101.5 | 105.9
Environmental Solutions |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 398.2 |  | 373.0 |  | 1,161.0 | 1,064.8
Environmental Solutions | Vehicles and equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 308.6 | [1] | 290.5 | [1] | 899.5 | 820.8
Environmental Solutions | Parts |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 56.8 |  | 53.8 |  | 177.9 | 168.2
Environmental Solutions | Rental income |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 15.4 | [2] | 13.8 | [2] | 44.8 | 41.7
Environmental Solutions | Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 17.4 | [3] | 14.9 | [3] | 38.8 | 34.1
Safety and Security Systems |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 76.0 |  | 73.4 |  | 228.5 | 209.5
Safety and Security Systems | Public safety and security equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 48.2 |  | 44.2 |  | 146.2 | 126.8
Safety and Security Systems | Industrial signaling equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | 17.9 |  | 17.8 |  | 52.4 | 55.1
Safety and Security Systems | Warning systems |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Net sales | $ 9.9 |  | $ 11.4 |  | $ 29.9 | $ 27.6
[1] | Includes net sales from the sale of new and used vehicles and equipment, including sales of rental equipment.
[2] | Represents income from vehicle and equipment lease arrangements with customers.
[3] | Primarily includes revenues from services, such as maintenance and repair work, and the sale of extended warranty contracts.

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