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Revenues from Contracts (Tables)
 12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
We disaggregate revenue from contracts with customers by major product line and based on the timing of recognition for each of our reportable segments and our other operating segment, as we believe such disaggregation best depicts how the nature, amount, timing, and uncertainty of our revenues and cash flows are effected by economic factors, with such disaggregation presented below for the years ended December 31, 2020, 2019, and 2018:

Year Ended December 31, 2020
Reportable Segments and OtherHVACDetection and MeasurementEngineered SolutionsOtherTotal
Major product lines
Cooling$297.0 $— $— $— $297.0 
Boilers, comfort heating, and ventilation293.7 — — — 293.7 
Underground locators, inspection and rehabilitation equipment, and robotic systems— 217.8 — — 217.8 
Signal monitoring, obstruction lighting, and bus fare collection systems— 169.5 — — 169.5 
Power transformers— — 427.4 — 427.4 
Process cooling equipment and services— — 150.1 0.8 150.9 
South African projects— — — 3.2 3.2 
$590.7 $387.3 $577.5 $4.0 $1,559.5 
Timing of Revenue Recognition
Revenues recognized at a point in time$590.7 $341.9 $41.3 $0.2 $974.1 
Revenues recognized over time— 45.4 536.2 3.8 585.4 
$590.7 $387.3 $577.5 $4.0 $1,559.5 
Year Ended December 31, 2019
Reportable Segments and OtherHVACDetection and MeasurementEngineered Solutions OtherTotal
Major product lines
Cooling$284.2 $— $— $— $284.2 
Boilers, comfort heating, and ventilation309.0 — — — 309.0 
Underground locators and inspection and rehabilitation equipment— 194.3 — — 194.3 
Signal monitoring, obstruction lighting, and bus fare collection systems— 190.6 — — 190.6 
Power transformers— — 403.4 — 403.4 
Process cooling equipment and services— — 145.5 4.8 150.3 
South African projects (1)
— — — (10.9)(10.9)
$593.2 $384.9 $548.9 $(6.1)$1,520.9 
Timing of Revenue Recognition
Revenues recognized at a point in time$593.2 $357.1 $48.4 $— $998.7 
Revenues recognized over time (1)
— 27.8 500.5 (6.1)522.2 
$593.2 $384.9 $548.9 $(6.1)$1,520.9 
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(1) As discussed above, during the year ended December 31, 2019, we reduced the amount of revenue associated with the large power projects in South Africa by $23.5.


Year Ended December 31, 2018
Reportable Segments and OtherHVACDetection and MeasurementEngineered Solutions OtherTotal
Major product lines
Cooling$281.7 $— $— $— $281.7 
Boilers, comfort heating, and ventilation300.4 — — — 300.4 
Underground locators and inspection and rehabilitation equipment— 159.1 — — 159.1 
Signal monitoring, obstruction lighting, and bus fare collection systems— 161.8 — — 161.8 
Power transformers— — 373.8 — 373.8 
Process cooling equipment and services— — 163.2 23.5 186.7 
South African projects— — — 49.1 49.1 
$582.1 $320.9 $537.0 $72.6 $1,512.6 
Timing of Revenue Recognition
Revenues recognized at a point in time$582.1 $307.3 $61.5 $— $950.9 
Revenues recognized over time— 13.6 475.5 72.6 561.7 
$582.1 $320.9 $537.0 $72.6 $1,512.6 
Contract with Customer, Asset and Liability Our contract balances consisted of the following as of December 31, 2020 and 2019:
Contract BalancesDecember 31, 2020December 31, 2019Change
Contract Accounts Receivable (1)
$260.7 $259.7 $1.0 
Contract Assets81.1 63.1 18.0 
Contract Liabilities - current(103.5)(100.5)(3.0)
Contract Liabilities - non-current (2)
(3.4)(3.3)(0.1)
Net contract balance$234.9 $219.0 $15.9 
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(1) Included in “Accounts receivable, net” within the accompanying consolidated balance sheets.
(2) Included in “Other long-term liabilities” within the accompanying consolidated balance sheets.