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Segment Information (Tables)
12 Months Ended
Dec. 31, 2020
Segment Reporting [Abstract]  
Summary of Continuing Operations by Segment
The following table summarizes the Company’s continuing operations by segment, including net sales, operating income, depreciation and amortization, total assets and capital expenditures:
(in millions)202020192018
Net sales:
Environmental Solutions$915.8 $992.9 $863.5 
Safety and Security Systems215.0 228.4 226.0 
Total net sales$1,130.8 $1,221.3 $1,089.5 
Operating income:
Environmental Solutions$124.3 $139.4 $113.0 
Safety and Security Systems35.5 38.6 34.1 
Corporate and eliminations(28.4)(30.9)(25.6)
Total operating income131.4 147.1 121.5 
Interest expense5.7 7.9 9.3 
Other expense, net1.1 0.6 0.6 
Income before income taxes$124.6 $138.6 $111.6 
Depreciation and amortization:
Environmental Solutions$41.3 $38.1 $32.6 
Safety and Security Systems3.4 3.3 3.7 
Corporate0.1 0.1 0.1 
Total depreciation and amortization$44.8 $41.5 $36.4 
Total assets:
Environmental Solutions$926.8 $908.1 $775.2 
Safety and Security Systems225.5 222.6 211.5 
Corporate and eliminations56.3 34.5 36.7 
Total assets of continuing operations1,208.6 1,165.2 1,023.4 
Total assets of discontinued operations0.2 0.3 0.4 
Total assets$1,208.8 $1,165.5 $1,023.8 
Capital expenditures:
Environmental Solutions$24.4 $31.6 $11.1 
Safety and Security Systems4.1 2.7 2.0 
Corporate1.2 1.1 1.0 
Total capital expenditures$29.7 $35.4 $14.1 
Schedule Of Segment Reporting Information By Geographical Segment Table
The following table summarizes net sales by geographic region based on the location of the end-customer:
(in millions)202020192018
Net sales:
U.S.$872.2 $952.8 $848.0 
Canada160.5 169.0 150.9 
Europe/Other98.1 99.5 90.6 
Total net sales$1,130.8 $1,221.3 $1,089.5 
The following table summarizes long-lived assets by geographic region based on the location of the Company’s subsidiaries:
(in millions)202020192018
Long-lived assets:
U.S.$177.4 $168.3 $110.3 
Canada60.4 62.7 50.4 
Europe/Other4.3 3.9 3.5 
Total long-lived assets(a)
$242.1 $234.9 $164.2 
(a)    Amounts as of December 31, 2020 and 2019 include operating lease right-of-use assets, as further described in Note 4 – Leases.