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REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Apr. 03, 2021 | Mar. 28, 2020
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 398.5 | $ 367.4
Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 253.9 | 213.6
Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 144.6 | 153.8
Cooling |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 72.6 | 57.9
Boilers, comfort heating, and ventilation |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 73.9 | 60.6
Underground locators, inspection and rehabilitation equipment, and robotic systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 67.4 | 48.7
Signal monitoring, obstruction lighting, and bus fare collection systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 44.2 | 43.2
Power transformers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 110.6 | 110.6
Process cooling equipment and services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 29.3 | 44.3
South African projects |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.5 | 2.1
HVAC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 146.5 | 118.5
HVAC | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 146.5 | 118.5
HVAC | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
HVAC | Cooling |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 72.6 | 57.9
HVAC | Boilers, comfort heating, and ventilation |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 73.9 | 60.6
HVAC | Underground locators, inspection and rehabilitation equipment, and robotic systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
HVAC | Signal monitoring, obstruction lighting, and bus fare collection systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
HVAC | Power transformers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
HVAC | Process cooling equipment and services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
HVAC | South African projects |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Detection and Measurement |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 111.6 | 91.9
Detection and Measurement | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 96.5 | 83.5
Detection and Measurement | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 15.1 | 8.4
Detection and Measurement | Cooling |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Detection and Measurement | Boilers, comfort heating, and ventilation |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Detection and Measurement | Underground locators, inspection and rehabilitation equipment, and robotic systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 67.4 | 48.7
Detection and Measurement | Signal monitoring, obstruction lighting, and bus fare collection systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 44.2 | 43.2
Detection and Measurement | Power transformers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Detection and Measurement | Process cooling equipment and services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Detection and Measurement | South African projects |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Engineered Solutions |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 139.7 | 154.9
Engineered Solutions | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 10.9 | 11.6
Engineered Solutions | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 128.8 | 143.3
Engineered Solutions | Cooling |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Engineered Solutions | Boilers, comfort heating, and ventilation |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Engineered Solutions | Underground locators, inspection and rehabilitation equipment, and robotic systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Engineered Solutions | Signal monitoring, obstruction lighting, and bus fare collection systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Engineered Solutions | Power transformers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 110.6 | 110.6
Engineered Solutions | Process cooling equipment and services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 29.1 | 44.3
Engineered Solutions | South African projects |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.7 | 2.1
Other | Transferred at Point in Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other | Transferred over Time |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.7 | 2.1
Other | Cooling |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other | Boilers, comfort heating, and ventilation |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other | Underground locators, inspection and rehabilitation equipment, and robotic systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other | Signal monitoring, obstruction lighting, and bus fare collection systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other | Power transformers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.0 | 0.0
Other | Process cooling equipment and services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0.2 | 0.0
Other | South African projects |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 0.5 | $ 2.1

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