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REVENUES FROM CONTRACTS (Tables)
3 Months Ended
Apr. 03, 2021
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 affected by economic factors, with such disaggregation presented below for the three months ended April 3, 2021 and March 28, 2020:
Three months ended April 3, 2021
Reportable Segments and OtherHVACDetection and MeasurementEngineered SolutionsOtherTotal
Major product lines
Cooling$72.6 $— $— $— $72.6 
Boilers, comfort heating, and ventilation73.9 — — — 73.9 
Underground locators, inspection and rehabilitation
 equipment, and robotic systems
— 67.4 — — 67.4 
Signal monitoring, obstruction lighting, and bus fare collection systems— 44.2 — — 44.2 
Power transformers— — 110.6 — 110.6 
Process cooling equipment and services— — 29.1 0.2 29.3 
South African projects— — — 0.5 0.5 
$146.5 $111.6 $139.7 $0.7 $398.5 
Timing of Revenue Recognition
Revenues recognized at a point in time$146.5 $96.5 $10.9 $— $253.9 
Revenues recognized over time— 15.1 128.8 0.7 144.6 
$146.5 $111.6 $139.7 $0.7 $398.5 
Three months ended March 28, 2020
Reportable Segments and OtherHVACDetection and MeasurementEngineered SolutionsOtherTotal
Major product lines
Cooling$57.9 $— $— $— $57.9 
Boilers, comfort heating, and ventilation60.6 — — — 60.6 
Underground locators and inspection and rehabilitation
 equipment
— 48.7 — — 48.7 
Signal monitoring, obstruction lighting, and bus fare collection systems— 43.2 — — 43.2 
Power transformers— — 110.6 — 110.6 
Process cooling equipment and services— — 44.3 — 44.3 
South African projects— — — 2.1 2.1 
$118.5 $91.9 $154.9 $2.1 $367.4 
Timing of Revenue Recognition
Revenues recognized at a point in time$118.5 $83.5 $11.6 $— $213.6 
Revenues recognized over time— 8.4 143.3 2.1 153.8 
$118.5 $91.9 $154.9 $2.1 $367.4 
Contract with Customer, Asset and Liability Our contract balances consisted of the following as of April 3, 2021 and December 31, 2020:
Contract BalancesApril 3, 2021December 31, 2020Change
Contract Accounts Receivable(1)
$226.6 $260.7 $(34.1)
Contract Assets75.8 81.1 (5.3)
Contract Liabilities - current(106.7)(103.5)(3.2)
Contract Liabilities - non-current(2)
(3.2)(3.4)0.2 
Net contract balance$192.5 $234.9 $(42.4)
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(1) Included in “Accounts receivable, net” within the accompanying condensed consolidated balance sheets.

(2) Included in “Other long-term liabilities” within the accompanying condensed consolidated balance sheets.