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Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue Recognition [Abstract]  
Net Sales Disaggregated By Major Product Line The following table presents the Company’s Net sales disaggregated by major product line:
For the Years Ended December 31,
(in millions)202120202019
Environmental Solutions
Vehicles and equipment (a)
$764.3 $719.3 $788.7 
Parts150.3 129.4 132.8 
Rental income (b)
44.7 36.6 46.2 
Other (c)
44.7 30.5 25.2 
Total net sales1,004.0 915.8 992.9 
Safety and Security Systems
Public safety and security equipment126.1 132.6 133.5 
Industrial signaling equipment53.9 50.8 59.3 
Warning systems29.2 31.6 35.6 
Total net sales209.2 215.0 228.4 
Total net sales$1,213.2 $1,130.8 $1,221.3 
(a)    Includes net sales from the sale of new and used vehicles and equipment, including sales of rental equipment.
(b)    Represents revenues from vehicle and equipment lease arrangements with customers, recognized in accordance with Topic 842.
(c)    Primarily includes revenues from services such as maintenance and repair work and the sale of extended warranty contracts.