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INFORMATION ON REPORTABLE AND OTHER OPERATING SEGMENTS (Details) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 28, 2019 USD ($) country	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Sep. 29, 2018 USD ($)	Sep. 28, 2019 USD ($) country segment	Sep. 29, 2018 USD ($)
Information on reportable segments and other operating segments
Number of countries in which entity operates (over 15 countries) | country	17				17
Number of reportable segments | segment					3
Revenues:
Revenues	$ 364.8			$ 362.5	$ 1,080.8	$ 1,093.6
Income (loss):
Consolidated operating income	27.6			13.4	56.9	55.4
Special charges, net	(2.0)			(1.0)	(3.4)	(4.6)
Other operating expenses	0.0			0.0	(1.8)	0.0
Operating Segments
Income (loss):
Consolidated operating income	42.9			29.6	105.1	107.6
Corporate
Income (loss):
Corporate expense	(10.0)			(10.5)	(32.9)	(34.8)
Special charges, net	(0.2)			0.0	(0.2)	(0.4)
Segment Reconciling Items
Income (loss):
Long-term incentive compensation expense	(3.3)			(4.3)	(10.1)	(12.4)
Special charges, net	(2.0)			(1.0)	(3.4)	(4.6)
Other operating expenses	0.0			0.0	(1.8)	0.0
Loss on sale of dry cooling business	0.0			(0.4)	0.0	(0.4)
HVAC reportable segment
Revenues:
Revenues	140.1			132.0	399.4	399.4
Income (loss):
Special charges, net	(0.1)			(0.2)	(0.8)	(0.2)
HVAC reportable segment | Operating Segments
Income (loss):
Consolidated operating income	22.2			15.6	57.3	52.7
Detection and Measurement reportable segment
Revenues:
Revenues	97.6			84.3	284.4	224.5
Income (loss):
Special charges, net	0.0			0.0	0.0	0.0
Detection and Measurement reportable segment | Operating Segments
Income (loss):
Consolidated operating income	20.5			15.5	59.2	47.7
Engineered Solutions reportable segment
Revenues:
Revenues	121.1			124.8	398.1	388.0
Income (loss):
Special charges, net	(0.3)			0.0	(0.7)	0.0
Engineered Solutions reportable segment | Operating Segments
Income (loss):
Consolidated operating income	5.9			6.5	26.9	23.7
All Other
Revenues:
Revenues	6.0			21.4	(1.1)	81.7
Income (loss):
Consolidated operating income	(5.7)			(8.0)	(38.3)	(16.5)
Special charges, net	$ (1.4)			$ (0.8)	$ (1.7)	$ (4.0)
Minimum
Information on reportable segments and other operating segments
Number of countries in which entity sells its products and services (over 100 countries) | country	100				100
Contracts Accounted for under Percentage of Completion | South Africa | Large Power Projects | All Other | Operating Segments
Revenues:
Revenues		$ (6.0)	$ (17.5)

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