Segment Information - Segment Results (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Oct. 02, 2020	Jul. 03, 2020	Apr. 03, 2020	Dec. 31, 2019	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 732.3	$ 640.5	$ 362.0	$ 547.2	$ 720.5	$ 659.3	$ 712.1	$ 659.7	$ 2,282.0	$ 2,751.6	$ 2,844.5
Operating profit									33.3	277.5	298.4
Other (expense) income									(0.9)	1.5	2.7
Interest expense, net									(62.5)	(3.5)	0.0
(Loss) income before income taxes									(30.1)	275.5	301.1
Identifiable assets	6,876.0				6,158.3				6,876.0	6,158.3	5,841.6
Depreciation and amortization									132.6	128.5	130.0
Capital expenditures, gross									47.7	77.8	72.2
Other
Segment Reporting Information [Line Items]
Operating profit									(77.6)	(56.0)	(63.4)
Identifiable assets	924.5				239.2				924.5	239.2	8.4
Depreciation and amortization									2.4	1.7	1.2
Capital expenditures, gross									1.7	6.8	3.1
Specialty Products & Technologies
Segment Reporting Information [Line Items]
Sales									1,117.3	1,342.7
Specialty Products & Technologies | Operating segments
Segment Reporting Information [Line Items]
Sales									1,117.3	1,342.7	1,369.8
Operating profit									72.7	227.7	241.3
Identifiable assets	3,773.3				3,662.5				3,773.3	3,662.5	3,539.1
Depreciation and amortization									80.6	75.4	76.9
Capital expenditures, gross									36.4	51.5	42.2
Equipment & Consumables
Segment Reporting Information [Line Items]
Sales									1,164.7	1,408.9
Equipment & Consumables | Operating segments
Segment Reporting Information [Line Items]
Sales									1,164.7	1,408.9	1,474.7
Operating profit									38.2	105.8	120.5
Identifiable assets	$ 2,178.2				$ 2,256.6				2,178.2	2,256.6	2,294.1
Depreciation and amortization									49.6	51.4	51.9
Capital expenditures, gross									$ 9.6	$ 19.5	$ 26.9