Segment Information - Segment Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Jun. 27, 2025	Jun. 28, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Sales	$ 682.1	$ 633.1	$ 1,299.0	$ 1,256.7
Operating profit (loss)	46.3	(1,153.3)	85.3	(1,105.2)
Nonoperating other income (expense), net	2.4	(1.1)	1.7	(1.0)
Interest expense, net	(8.0)	(11.7)	(17.3)	(24.6)
Income (loss) before income taxes	40.7	(1,166.1)	69.7	(1,130.8)
Depreciation and amortization	29.8	34.0	57.7	66.1
Capital expenditures, gross	10.9	7.1	18.4	18.0
Identifiable assets	5,664.4		5,664.4		$ 5,350.5
Operating segments
Segment Reporting Information [Line Items]
Sales	682.1	633.1	1,299.0	1,256.7
Expenses	600.7	600.6	1,148.1	1,144.4
Operating profit (loss)	81.4	32.5	150.9	112.3
Corporate and other
Segment Reporting Information [Line Items]
Operating profit (loss)	(35.1)	(1,185.8)	(65.6)	(1,217.5)
Depreciation and amortization	0.4	0.6	0.8	1.2
Capital expenditures, gross	(0.2)	0.8	0.1	1.6
Identifiable assets	1,154.0		1,154.0		1,112.1
Specialty Products & Technologies
Segment Reporting Information [Line Items]
Sales	445.1	415.1	845.4	823.8
Specialty Products & Technologies | Operating segments
Segment Reporting Information [Line Items]
Sales	445.1	415.1	845.4	823.8
Expenses	399.8	409.1	762.5	773.6
Operating profit (loss)	45.3	6.0	82.9	50.2
Depreciation and amortization	22.0	22.5	42.6	43.1
Capital expenditures, gross	6.7	5.4	10.4	11.8
Identifiable assets	2,492.3		2,492.3		2,354.2
Equipment & Consumables
Segment Reporting Information [Line Items]
Sales	237.0	218.0	453.6	432.9
Equipment & Consumables | Operating segments
Segment Reporting Information [Line Items]
Sales	237.0	218.0	453.6	432.9
Expenses	200.9	191.5	385.6	370.8
Operating profit (loss)	36.1	26.5	68.0	62.1
Depreciation and amortization	7.4	10.9	14.3	21.8
Capital expenditures, gross	4.4	$ 0.9	7.9	$ 4.6
Identifiable assets	$ 2,018.1		$ 2,018.1		$ 1,884.2