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Revenue Recognition (Tables)
 6 Months Ended
Jun. 30, 2023
Revenue from Contract with Customer [Abstract]  
Net Sales Disaggregated By Geographic Region and Major Product Line
The following table presents the Company’s Net sales disaggregated by geographic region, based on the location of the end customer, and by major product line:
Three Months Ended
June 30,		Six Months Ended
June 30,
(in millions)2023202220232022
Geographic Region:
U.S.$338.9 $299.8 $648.0 $564.2 
Canada69.4 44.0 113.3 86.3 
Europe/Other34.1 22.9 66.6 46.4 
Total net sales$442.4 $366.7 $827.9 $696.9 
Major Product Line:
Environmental Solutions
Vehicles and equipment (a)
$285.0 $235.8 $530.3 $453.2 
Parts59.6 45.1 114.4 85.9 
Rental income (b)
16.9 16.1 27.9 25.8 
Other (c)
11.5 9.3 19.2 15.6 
Total373.0 306.3 691.8 580.5 
Safety and Security Systems
Public safety and security equipment42.4 37.5 82.6 73.6 
Industrial signaling equipment18.7 15.1 37.3 29.3 
Warning systems8.3 7.8 16.2 13.5 
Total69.4 60.4 136.1 116.4 
Total net sales$442.4 $366.7 $827.9 $696.9 
(a)    Includes net sales from the sale of new and used vehicles and equipment, including sales of rental equipment.
(b)    Represents income from vehicle and equipment lease arrangements with customers.
(c)    Primarily includes revenues from services, such as maintenance and repair work, and the sale of extended warranty contracts.