INFORMATION ON REPORTABLE AND OTHER OPERATING SEGMENTS (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 27, 2020 USD ($) country	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Jun. 27, 2020 USD ($) country	Jun. 29, 2019 USD ($)
Information on reportable segments and other operating segments
Number of countries in which entity operates (over 15 countries) | country	17			17
Revenues:
Revenues	$ 373.2	$ 372.4		$ 742.5	$ 716.0
Income (loss):
Consolidated operating income	34.4	26.3		67.1	29.3
Special charges, net	(1.4)	(1.3)		(1.7)	(1.4)
Other operating income (expense)	0.0	0.0		0.4	(1.8)
Operating Segments
Income (loss):
Consolidated operating income	47.6	41.4		94.8	62.2
Corporate
Income (loss):
Corporate expense	(8.5)	(10.5)		(19.6)	(22.9)
Special charges, net	(0.5)	0.0		(0.5)	0.0
Segment Reconciling Items
Income (loss):
Long-term incentive compensation expense	(3.3)	(3.3)		(6.8)	(6.8)
Special charges, net	(1.4)	(1.3)		(1.7)	(1.4)
Other operating income (expense)	0.0	0.0		0.4	(1.8)
HVAC reportable segment
Revenues:
Revenues	132.3	130.9		250.8	259.3
Income (loss):
Special charges, net	(0.4)	(0.6)		(0.5)	(0.7)
HVAC reportable segment | Operating Segments
Income (loss):
Consolidated operating income	18.2	16.7		33.2	35.1
Detection and Measurement reportable segment
Revenues:
Revenues	92.1	101.7		184.0	186.8
Income (loss):
Special charges, net	(0.1)	0.0		(0.1)	0.0
Detection and Measurement reportable segment | Operating Segments
Income (loss):
Consolidated operating income	16.0	21.7		34.2	38.7
Engineered Solutions reportable segment
Revenues:
Revenues	146.8	139.0		301.7	277.0
Income (loss):
Special charges, net	0.0	(0.4)		0.0	(0.4)
Engineered Solutions reportable segment | Operating Segments
Income (loss):
Consolidated operating income	17.6	13.0		35.5	21.0
All Other
Revenues:
Revenues	2.0	0.8		6.0	(7.1)
Income (loss):
Consolidated operating income	(4.2)	(10.0)		(8.1)	(32.6)
Special charges, net	$ (0.4)	(0.3)		$ (0.6)	(0.3)
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)	$ 0.3	$ (23.5)