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REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 343.6	$ 351.9
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	221.6	205.6
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	122.0	146.3
Cooling
Disaggregation of Revenue [Line Items]
Revenues	58.9	59.6
Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	69.5	68.1
Underground locators and inspection and rehabilitation equipment
Disaggregation of Revenue [Line Items]
Revenues	47.1	25.8
Signal monitoring, obstruction lighting, and bus fare collection systems
Disaggregation of Revenue [Line Items]
Revenues	38.0	39.8
Power transformers
Disaggregation of Revenue [Line Items]
Revenues	98.8	91.3
Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	42.9	53.0
South African projects
Disaggregation of Revenue [Line Items]
Revenues	(11.6)	14.3
HVAC
Disaggregation of Revenue [Line Items]
Revenues	128.4	127.7
HVAC | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	128.4	127.7
HVAC | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0
HVAC | Cooling
Disaggregation of Revenue [Line Items]
Revenues	58.9	59.6
HVAC | Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	69.5	68.1
HVAC | Underground locators and inspection and rehabilitation equipment
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, and heat exchangers
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	85.1	65.6
Detection and Measurement | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	79.6	64.0
Detection and Measurement | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	5.5	1.6
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 and inspection and rehabilitation equipment
Disaggregation of Revenue [Line Items]
Revenues	47.1	25.8
Detection and Measurement | Signal monitoring, obstruction lighting, and bus fare collection systems
Disaggregation of Revenue [Line Items]
Revenues	38.0	39.8
Detection and Measurement | Power transformers
Disaggregation of Revenue [Line Items]
Revenues	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
Detection and Measurement | South African projects
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0
Engineered Solutions
Disaggregation of Revenue [Line Items]
Revenues	138.0	127.8
Engineered Solutions | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	12.5	12.6
Engineered Solutions | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	125.5	115.2
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 and inspection and rehabilitation equipment
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	98.8	91.3
Engineered Solutions | Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	39.2	36.5
Engineered Solutions | South African projects
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0
All Other
Disaggregation of Revenue [Line Items]
Revenues	(7.9)	30.8
All Other | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	1.1	1.3
All Other | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	(9.0)	29.5
All Other | Cooling
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0
All Other | Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0
All Other | Underground locators and inspection and rehabilitation equipment
Disaggregation of Revenue [Line Items]
Revenues	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
All Other | Power transformers
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0
All Other | Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	3.7	16.5
All Other | South African projects
Disaggregation of Revenue [Line Items]
Revenues	(11.6)	$ 14.3
SOUTH AFRICA | Operating Segments | Large Power Projects | Contracts Accounted for under Percentage of Completion | All Other
Disaggregation of Revenue [Line Items]
Revenues	$ (17.5)

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