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REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 362.5	$ 348.5	$ 1,093.6	$ 1,038.8
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	228.6		663.1
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	133.9		430.5
Cooling
Disaggregation of Revenue [Line Items]
Revenues	65.1		201.6
Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	66.9		197.8
Underground locators and inspection and rehabilitation equipment
Disaggregation of Revenue [Line Items]
Revenues	49.8		110.7
Signal monitoring, obstruction lighting, and bus fare collection systems
Disaggregation of Revenue [Line Items]
Revenues	34.5		113.8
Power transformers
Disaggregation of Revenue [Line Items]
Revenues	89.4		274.9
Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	47.0		156.0
South African projects
Disaggregation of Revenue [Line Items]
Revenues	9.8		38.8
HVAC segment
Disaggregation of Revenue [Line Items]
Revenues	132.0	119.4	399.4	349.8
HVAC segment | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	132.0		399.4
HVAC segment | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	0.0		0.0
HVAC segment | Cooling
Disaggregation of Revenue [Line Items]
Revenues	65.1		201.6
HVAC segment | Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	66.9		197.8
HVAC segment | Underground locators and inspection and rehabilitation 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	84.3	66.9	224.5	185.0
Detection and Measurement segment | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	79.5		215.6
Detection and Measurement segment | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	4.8		8.9
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 inspection and rehabilitation equipment
Disaggregation of Revenue [Line Items]
Revenues	49.8		110.7
Detection and Measurement segment | Signal monitoring, obstruction lighting, and bus fare collection systems
Disaggregation of Revenue [Line Items]
Revenues	34.5		113.8
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	146.2	$ 162.2	469.7	$ 504.0
Engineered Solutions segment | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	17.1		48.1
Engineered Solutions segment | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	129.1		421.6
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 inspection and rehabilitation 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	89.4		274.9
Engineered Solutions segment | Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	47.0		156.0
Engineered Solutions segment | South African projects
Disaggregation of Revenue [Line Items]
Revenues	$ 9.8		$ 38.8

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