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REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 28, 2019 | Jun. 29, 2019 | Mar. 30, 2019 | Sep. 29, 2018 | Sep. 28, 2019 | Sep. 29, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | $ 364.8 |  |  | $ 362.5 | $ 1,080.8 | $ 1,093.6
Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 244.1 |  |  | 228.6 | 706.1 | 663.1
Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 120.7 |  |  | 133.9 | 374.7 | 430.5
Cooling |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 68.4 |  |  | 65.1 | 194.3 | 201.6
Boilers, comfort heating, and ventilation |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 71.7 |  |  | 66.9 | 205.1 | 197.8
Underground locators and inspection and rehabilitation equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 45.0 |  |  | 49.8 | 144.7 | 110.7
Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 52.6 |  |  | 34.5 | 139.7 | 113.8
Power transformers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 93.4 |  |  | 89.4 | 296.8 | 274.9
Process cooling equipment and services, and heat exchangers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 28.6 |  |  | 47.0 | 109.0 | 156.0
South African projects |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 5.1 |  |  | 9.8 | (8.8) | 38.8
HVAC |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 140.1 |  |  | 132.0 | 399.4 | 399.4
HVAC | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 140.1 |  |  | 132.0 | 399.4 | 399.4
HVAC | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
HVAC | Cooling |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 68.4 |  |  | 65.1 | 194.3 | 201.6
HVAC | Boilers, comfort heating, and ventilation |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 71.7 |  |  | 66.9 | 205.1 | 197.8
HVAC | Underground locators and inspection and rehabilitation equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
HVAC | Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
HVAC | Power transformers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
HVAC | Process cooling equipment and services, and heat exchangers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
HVAC | South African projects |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Detection and Measurement |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 97.6 |  |  | 84.3 | 284.4 | 224.5
Detection and Measurement | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 91.0 |  |  | 79.5 | 266.7 | 215.6
Detection and Measurement | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 6.6 |  |  | 4.8 | 17.7 | 8.9
Detection and Measurement | Cooling |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Detection and Measurement | Boilers, comfort heating, and ventilation |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Detection and Measurement | Underground locators and inspection and rehabilitation equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 45.0 |  |  | 49.8 | 144.7 | 110.7
Detection and Measurement | Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 52.6 |  |  | 34.5 | 139.7 | 113.8
Detection and Measurement | Power transformers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Detection and Measurement | Process cooling equipment and services, and heat exchangers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Detection and Measurement | South African projects |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Engineered Solutions |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 121.1 |  |  | 124.8 | 398.1 | 388.0
Engineered Solutions | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 12.6 |  |  | 15.2 | 38.0 | 43.5
Engineered Solutions | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 108.5 |  |  | 109.6 | 360.1 | 344.5
Engineered Solutions | Cooling |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Engineered Solutions | Boilers, comfort heating, and ventilation |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
Engineered Solutions | Underground locators and inspection and rehabilitation equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 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 | 0.0 | 0.0
Engineered Solutions | Power transformers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 93.4 |  |  | 89.4 | 296.8 | 274.9
Engineered Solutions | Process cooling equipment and services, and heat exchangers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 27.7 |  |  | 35.4 | 101.3 | 113.1
Engineered Solutions | South African projects |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
All Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 6.0 |  |  | 21.4 | (1.1) | 81.7
All Other | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.4 |  |  | 1.9 | 2.0 | 4.6
All Other | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 5.6 |  |  | 19.5 | (3.1) | 77.1
All Other | Cooling |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
All Other | Boilers, comfort heating, and ventilation |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
All Other | Underground locators and inspection and rehabilitation equipment |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
All Other | Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
All Other | Power transformers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.0 |  |  | 0.0 | 0.0 | 0.0
All Other | Process cooling equipment and services, and heat exchangers |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 0.9 |  |  | 11.6 | 7.7 | 42.9
All Other | South African projects |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | 5.1 |  |  | $ 9.8 | (8.8) | $ 38.8
South Africa | Operating Segments | Large Power Projects | Contracts Accounted for under Percentage of Completion | All Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues |  | $ (6.0) | $ (17.5) |  |  |
South Africa | Operating Segments | Large Power Projects | Contracts Accounted for under Percentage of Completion | All Other | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenues | $ 9.8 |  |  |  | $ (23.5) |

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