Segment Information - Segment Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Oct. 01, 2021	Oct. 02, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales	$ 607.3	$ 547.2	$ 1,857.1	$ 1,312.8
Operating profit (loss)	81.7	61.6	260.1	(30.0)
Other income	0.2	0.2	0.8	0.4
Interest expense, net	(12.0)	(23.4)	(43.6)	(41.2)
Income (loss) before income taxes	69.9	38.4	217.3	(70.8)
Identifiable assets	6,562.0		6,562.0		$ 6,876.0
Discontinued Operations, Disposed of by Sale
Segment Reporting Information [Line Items]
Held for Sale	468.0		468.0		482.9
Other
Segment Reporting Information [Line Items]
Operating profit (loss)	(25.2)	(18.7)	(82.5)	(67.2)
Identifiable assets	676.1		676.1		924.5
Specialty Products & Technologies
Segment Reporting Information [Line Items]
Sales	363.4	316.9	1,116.1	774.1
Specialty Products & Technologies | Operating segments
Segment Reporting Information [Line Items]
Sales	363.4	316.9	1,116.1	774.1
Operating profit (loss)	61.5	41.4	211.6	26.2
Identifiable assets	3,537.3		3,537.3		3,773.3
Equipment & Consumables
Segment Reporting Information [Line Items]
Sales	243.9	230.3	741.0	538.7
Equipment & Consumables | Operating segments
Segment Reporting Information [Line Items]
Sales	243.9	230.3	741.0	538.7
Operating profit (loss)	45.4	$ 38.9	131.0	$ 11.0
Identifiable assets	$ 1,880.6		$ 1,880.6		$ 1,695.3