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INFORMATION ON REPORTABLE SEGMENTS AND OTHER OPERATING SEGMENT (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021 USD ($) country	Jun. 27, 2020 USD ($)	Jul. 03, 2021 USD ($) segment country	Jun. 27, 2020 USD ($)
Information on reportable segments and other operating segments
Number of countries in which entity operates (over 15 countries) | country	15		15
Number of countries in which entity sells its products and services (over 100 countries) | country	100		100
Number of reportable segments | segment			2
Revenues:
Revenues	$ 296.7	$ 258.0	$ 584.6	$ 514.8
Income (loss):
Consolidated operating income	12.9	17.5	32.9	33.6
Special charges, net	(0.7)	(1.0)	(1.4)	(1.3)
Other operating income	(2.7)	0.0	(2.7)	0.4
Operating Segments
Revenues:
Revenues	296.7	258.0	584.6	514.8
Income (loss):
Consolidated operating income	32.9	31.3	70.6	62.9
Corporate expense
Income (loss):
Consolidated operating income	(13.3)	(9.7)	(27.5)	(22.0)
Special charges, net	0.0	(0.5)	0.0	(0.5)
Segment Reconciling Items
Income (loss):
Long-term incentive compensation expense	(3.3)	(3.1)	(6.1)	(6.4)
Special charges, net	(0.7)	(1.0)	(1.4)	(1.3)
Other operating income	(2.7)	0.0	(2.7)	0.4
Recorded charges related to asbestos product liability matters	2.7		2.7
Gain on revisions to estimates of certain liabilities				0.4
HVAC reportable segment
Revenues:
Revenues	185.4	165.2	361.0	328.0
HVAC reportable segment | Operating Segments
Revenues:
Revenues	185.4	165.2	361.0	328.0
Income (loss):
Consolidated operating income	25.4	19.6	47.7	37.3
Special charges, net	(0.2)	(0.4)	(0.2)	(0.5)
Detection and Measurement reportable segment
Revenues:
Revenues	111.2	92.1	222.8	184.0
Detection and Measurement reportable segment | Operating Segments
Revenues:
Revenues	111.2	92.1	222.8	184.0
Income (loss):
Consolidated operating income	11.4	16.0	31.4	34.2
Special charges, net	(0.4)	(0.1)	(0.6)	(0.1)
Other
Revenues:
Revenues	0.1	0.7	0.8	2.8
Other | Operating Segments
Revenues:
Revenues	0.1	0.7	0.8	2.8
Income (loss):
Consolidated operating income	(3.9)	(4.3)	(8.5)	(8.6)
Special charges, net	$ (0.1)	$ 0.0	$ (0.6)	$ (0.2)

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