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INFORMATION ON REPORTABLE SEGMENTS (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 29, 2018 USD ($) country	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Sep. 29, 2018 USD ($) country segment	Sep. 30, 2017 USD ($)
Information on reportable segments and other operating segments
Number of reportable segments | segment				3
Revenues:
Revenues	$ 362.5	$ 348.5		$ 1,093.6	$ 1,038.8
Income (loss):
Consolidated operating income	13.4	29.7		55.4	54.0
Pension and postretirement income				(5.1)	(8.3)
Special charges, net	(1.0)	(1.0)		(4.6)	(2.0)
Gain on contract settlement	0.0	10.2		0.0	10.2
Reportable and other operating segments
Income (loss):
Consolidated operating income	29.6	45.4		107.6	100.4
Corporate
Income (loss):
Corporate expense	(10.5)	(11.0)		(34.8)	(33.7)
Special charges, net	0.0	0.0		(0.4)	(0.1)
Segment Reconciling Items
Income (loss):
Long-term incentive compensation expense	(4.3)	(3.6)		(12.4)	(10.4)
Pension and postretirement income	0.0	(0.1)		0.0	(0.3)
Special charges, net	(1.0)	(1.0)		(4.6)	(2.0)
Loss on sale of dry cooling business	(0.4)	0.0		(0.4)	0.0
HVAC segment
Revenues:
Revenues	132.0	119.4		399.4	349.8
Income (loss):
Special charges, net	(0.2)	0.0		(0.2)	(0.4)
HVAC segment | Reportable and other operating segments
Income (loss):
Consolidated operating income	15.6	15.6		52.7	47.5
Detection and Measurement segment
Revenues:
Revenues	84.3	66.9		224.5	185.0
Income (loss):
Special charges, net	0.0	0.0		0.0	(0.3)
Detection and Measurement segment | Reportable and other operating segments
Income (loss):
Consolidated operating income	15.5	16.5		47.7	45.0
Engineered Solutions segment
Revenues:
Revenues	146.2	162.2		469.7	504.0
Income (loss):
Special charges, net	(0.8)	(1.0)		(4.0)	(1.2)
Proceeds from contract termination		9.0
Gain on contract settlement		10.2
Engineered Solutions segment | Reportable and other operating segments
Income (loss):
Consolidated operating income	$ (1.5)	$ 13.3		$ 7.2	7.9
Minimum
Information on reportable segments and other operating segments
Number of countries in which entity operates (over 15 countries) | country	14			14
Number of countries in which entity sells its products and services (over 100 countries) | country	100			100
SOUTH AFRICA | Large Power Projects | Contracts Accounted for under Percentage of Completion | Engineered Solutions segment | Reportable and other operating segments
Revenues:
Revenues	$ (2.7)		$ (13.5)	$ (2.7)	(13.5)
Income (loss):
Consolidated operating income	$ (4.7)			$ (4.7)	$ (22.9)

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