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REVENUES FROM CONTRACTS - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ (372.4)		$ (379.2)	$ (716.0)	$ (731.1)
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	(240.4)		(228.9)	(462.0)	(434.5)
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	(132.0)		(150.3)	(254.0)	(296.6)
Cooling
Disaggregation of Revenue [Line Items]
Revenues	(67.0)		(76.9)	(125.9)	(136.5)
Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	(63.9)		(62.8)	(133.4)	(130.9)
Underground locators and inspection and rehabilitation equipment
Disaggregation of Revenue [Line Items]
Revenues	(52.6)		(35.1)	(99.7)	(60.9)
Signal monitoring, obstruction lighting, and bus fare collection systems
Disaggregation of Revenue [Line Items]
Revenues	(49.1)		(39.5)	(87.1)	(79.3)
Power transformers
Disaggregation of Revenue [Line Items]
Revenues	(104.6)		(94.2)	(203.4)	(185.5)
Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	(37.5)		(56.0)	(80.4)	(109.0)
South African projects
Disaggregation of Revenue [Line Items]
Revenues	2.3		(14.7)	13.9	(29.0)
HVAC
Disaggregation of Revenue [Line Items]
Revenues	(130.9)		(139.7)	(259.3)	(267.4)
HVAC | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	(130.9)		(139.7)	(259.3)	(267.4)
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	(67.0)		(76.9)	(125.9)	(136.5)
HVAC | Boilers, comfort heating, and ventilation
Disaggregation of Revenue [Line Items]
Revenues	(63.9)		(62.8)	(133.4)	(130.9)
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	(101.7)		(74.6)	(186.8)	(140.2)
Detection and Measurement | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	(96.1)		(72.1)	(175.7)	(136.1)
Detection and Measurement | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	(5.6)		(2.5)	(11.1)	(4.1)
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	(52.6)		(35.1)	(99.7)	(60.9)
Detection and Measurement | Signal monitoring, obstruction lighting, and bus fare collection systems
Disaggregation of Revenue [Line Items]
Revenues	(49.1)		(39.5)	(87.1)	(79.3)
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	(139.0)		(135.4)	(277.0)	(263.2)
Engineered Solutions | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	(12.9)		(15.7)	(25.4)	(28.3)
Engineered Solutions | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	(126.1)		(119.7)	(251.6)	(234.9)
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	(104.6)		(94.2)	(203.4)	(185.5)
Engineered Solutions | Process cooling equipment and services, and heat exchangers
Disaggregation of Revenue [Line Items]
Revenues	(34.4)		(41.2)	(73.6)	(77.7)
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	(0.8)		(29.5)	7.1	(60.3)
All Other | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	(0.5)		(1.4)	(1.6)	(2.7)
All Other | Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	(0.3)		(28.1)	8.7	(57.6)
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	(3.1)		(14.8)	(6.8)	(31.3)
All Other | South African projects
Disaggregation of Revenue [Line Items]
Revenues	2.3		$ (14.7)	13.9	$ (29.0)
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		(10.8)
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	$ 6.0			$ 23.5

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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