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REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 379.2 | $ 349.7 | $ 731.1 | $ 690.3
Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 228.9 |  | 434.5 |
Transferred over Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 150.3 |  | 296.6 |
Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 76.9 |  | 136.5 |
Boilers, comfort heating, and ventilation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 62.8 |  | 130.9 |
Underground locators and rehabilitation and inspection equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 35.1 |  | 60.9 |
Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 39.5 |  | 79.3 |
Power transformers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 94.2 |  | 185.5 |
Process cooling equipment and services, and heat exchangers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 56.0 |  | 109.0 |
South African projects |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 14.7 |  | 29.0 |
HVAC segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 139.7 | 120.3 | 267.4 | 230.4
HVAC segment | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 139.7 |  | 267.4 |
HVAC segment | Transferred over Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
HVAC segment | Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 76.9 |  | 136.5 |
HVAC segment | Boilers, comfort heating, and ventilation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 62.8 |  | 130.9 |
HVAC segment | Underground locators and rehabilitation and inspection equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
HVAC segment | Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
HVAC segment | Power transformers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
HVAC segment | Process cooling equipment and services, and heat exchangers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
HVAC segment | South African projects |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Detection and Measurement segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 74.6 | 64.5 | 140.2 | 118.1
Detection and Measurement segment | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 72.1 |  | 136.1 |
Detection and Measurement segment | Transferred over Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2.5 |  | 4.1 |
Detection and Measurement segment | Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Detection and Measurement segment | Boilers, comfort heating, and ventilation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Detection and Measurement segment | Underground locators and rehabilitation and inspection equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 35.1 |  | 60.9 |
Detection and Measurement segment | Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 39.5 |  | 79.3 |
Detection and Measurement segment | Power transformers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Detection and Measurement segment | Process cooling equipment and services, and heat exchangers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Detection and Measurement segment | South African projects |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Engineered Solutions segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 164.9 | $ 164.9 | 323.5 | $ 341.8
Engineered Solutions segment | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 17.1 |  | 31.0 |
Engineered Solutions segment | Transferred over Time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 147.8 |  | 292.5 |
Engineered Solutions segment | Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Engineered Solutions segment | Boilers, comfort heating, and ventilation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Engineered Solutions segment | Underground locators and rehabilitation and inspection equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Engineered Solutions segment | Signal monitoring, obstruction lighting, and bus fare collection systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0.0 |  | 0.0 |
Engineered Solutions segment | Power transformers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 94.2 |  | 185.5 |
Engineered Solutions segment | Process cooling equipment and services, and heat exchangers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 56.0 |  | 109.0 |
Engineered Solutions segment | South African projects |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 14.7 |  | $ 29.0 |

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