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INFORMATION ON REPORTABLE SEGMENTS AND OTHER OPERATING SEGMENT (Details) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021 USD ($) country	Sep. 26, 2020 USD ($)	Oct. 02, 2021 USD ($) project segment country	Sep. 26, 2020 USD ($)
Information on reportable segments and other operating segments
Number of countries in which entity operates | country	15		15
Number of countries in which entity sells its products and services | country	100		100
Number of reportable segments | segment			2
Number of large power projects | project			2
Revenues:
Revenues	$ 285.8	$ 268.3	$ 870.4	$ 783.1
Income (loss):
Consolidated operating income	11.8	20.4	44.7	54.0
Special charges, net	(0.5)	(0.3)	(1.9)	(1.6)
Other operating income (expense)	0.0	0.0	(2.7)	0.4
Operating Segments
Revenues:
Revenues	285.8	268.3	870.4	783.1
Income (loss):
Consolidated operating income	27.2	35.7	97.8	98.6
Corporate expense
Income (loss):
Consolidated operating income	(11.5)	(11.8)	(39.0)	(33.8)
Special charges, net	0.0	(0.3)	0.0	(0.8)
Segment Reconciling Items
Income (loss):
Long-term incentive compensation expense	(3.4)	(3.2)	(9.5)	(9.6)
Special charges, net	(0.5)	(0.3)	(1.9)	(1.6)
Other operating income (expense)	0.0	0.0	(2.7)	0.4
Recorded charges related to asbestos product liability matters			2.7
Gain on revisions to estimates of certain liabilities				0.4
HVAC reportable segment
Revenues:
Revenues	179.3	182.6	540.3	510.6
HVAC reportable segment | Operating Segments
Revenues:
Revenues	179.3	182.6	540.3	510.6
Income (loss):
Consolidated operating income	21.4	26.8	69.1	64.1
Special charges, net	0.0	0.0	(0.2)	(0.5)
Detection and Measurement reportable segment
Revenues:
Revenues	106.4	85.2	329.2	269.2
Detection and Measurement reportable segment | Operating Segments
Revenues:
Revenues	106.4	85.2	329.2	269.2
Income (loss):
Consolidated operating income	9.9	14.2	41.3	48.4
Special charges, net	0.0	0.0	(0.6)	(0.1)
Other
Revenues:
Revenues	0.1	0.5	0.9	3.3
Other | Operating Segments
Revenues:
Revenues	0.1	0.5	0.9	3.3
Income (loss):
Consolidated operating income	(4.1)	(5.3)	(12.6)	(13.9)
Special charges, net	$ (0.5)	$ 0.0	$ (1.1)	$ (0.2)

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