INFORMATION ON REPORTABLE SEGMENTS AND CORPORATE EXPENSE - Financial Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024	Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 592.8	$ 483.7	$ 1,627.8	$ 1,450.2
Cost of products sold	353.3	286.1	963.5	868.9
Selling, general and administrative expense	117.7	101.6	344.4	305.7
Segment and Consolidated operating income	97.1	78.9	250.3	218.1
Acquisition and integration-related costs	7.7	1.4	21.0	6.3
Long-term incentive compensation expense	4.2	4.0	11.8	11.0
Amortization of acquired intangible assets	24.6	16.6	68.9	48.2
Special charges, net	0.1	0.5	0.2	0.9
Other operating expense, net	0.0	0.0	0.5	8.4
Other expense, net	(3.2)	(1.4)	(2.6)	(7.1)
Interest expense	12.0	12.1	39.9	34.7
Interest income	1.1	0.6	3.0	1.2
Loss on amendment/refinancing of senior credit agreement	(1.5)	0.0	(1.5)	0.0
Income from continuing operations before income taxes	81.5	66.0	209.3	177.5
Capital expenditures:
Total capital expenditures	10.4	7.9	23.6	28.2
Depreciation and amortization:
Total depreciation and amortization	32.4	23.5	91.9	67.9
Tangible Long-Lived Assets:
Total tangible long-lived assets	450.9		450.9		$ 384.5
Amortization of deferred compensation plan asset			17.4	0.0
Kranze Technology Solutions, Inc
Revenues from External Customers and Long-Lived Assets [Line Items]
Amortization of acquired intangible assets	5.5		14.7
Tangible Long-Lived Assets:
Amortization of deferred compensation plan asset	6.5		17.4
Kranze Technology Solutions, Inc | Cost of Sales | Step-Up of Inventory
Revenues from External Customers and Long-Lived Assets [Line Items]
Acquisition and integration-related costs	0.5		1.3
Sigma & Omega
Revenues from External Customers and Long-Lived Assets [Line Items]
Amortization of acquired intangible assets	5.0		9.4
Sigma & Omega | Cost of Sales | Step-Up of Inventory
Revenues from External Customers and Long-Lived Assets [Line Items]
Acquisition and integration-related costs	0.1		0.1
Ingénia Technologies Inc.
Revenues from External Customers and Long-Lived Assets [Line Items]
Acquisition and integration-related costs		0.9		4.8
Ingénia Technologies Inc. | Cost of Sales | Step-Up of Inventory
Revenues from External Customers and Long-Lived Assets [Line Items]
Acquisition and integration-related costs				1.8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	470.5	395.8	1,312.4	1,199.3
Tangible Long-Lived Assets:
Total tangible long-lived assets	331.7		331.7		275.5
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	55.8	28.2	135.7	82.0
Tangible Long-Lived Assets:
Total tangible long-lived assets	86.3		86.3		83.3
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18.2	16.5	52.9	45.9
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23.6	24.5	63.5	66.7
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24.7	18.7	63.3	56.3
Tangible Long-Lived Assets:
Total tangible long-lived assets	32.9		32.9		$ 25.7
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	592.8	483.7	1,627.8	1,450.2
Segment and Consolidated operating income	146.1	113.8	392.4	331.2
Corporate
Revenues from External Customers and Long-Lived Assets [Line Items]
Corporate expense	12.4	12.4	39.7	38.3
Special charges, net	0.0	0.0	0.1	0.0
Capital expenditures:
Total capital expenditures	0.0	0.0	0.0	0.5
Depreciation and amortization:
Total depreciation and amortization	0.6	0.6	1.8	1.9
Segment Reconciling Items | ULC Robotics
Revenues from External Customers and Long-Lived Assets [Line Items]
Other operating expense, net				8.4
HVAC reportable segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	387.4	335.3	1,087.1	994.2
HVAC reportable segment | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	387.4	335.3	1,087.1	994.2
Cost of products sold	236.1	206.0	661.8	615.2
Selling, general and administrative expense	56.9	49.3	161.2	146.9
Segment and Consolidated operating income	94.4	80.0	264.1	232.1
Special charges, net	0.0	0.0	(0.2)	0.2
Capital expenditures:
Total capital expenditures	6.2	6.0	17.0	23.7
Depreciation and amortization:
Total depreciation and amortization	19.6	16.7	55.4	47.9
Detection and Measurement reportable segment
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	205.4	148.4	540.7	456.0
Detection and Measurement reportable segment | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	205.4	148.4	540.7	456.0
Cost of products sold	116.6	80.1	300.3	251.9
Selling, general and administrative expense	37.1	34.5	112.1	105.0
Segment and Consolidated operating income	51.7	33.8	128.3	99.1
Special charges, net	0.1	0.5	0.3	0.7
Capital expenditures:
Total capital expenditures	4.2	1.9	6.6	4.0
Depreciation and amortization:
Total depreciation and amortization	$ 12.2	$ 6.2	$ 34.7	$ 18.1