Segment Information (Segment Results) (Details) $ in Millions	3 Months Ended	6 Months Ended
Jul. 03, 2020 USD ($)	Jun. 28, 2019 USD ($)	Jul. 03, 2020 USD ($) Segment	Jun. 28, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (in segments) \| Segment			2
Number of operating segments (in segments) \| Segment			2
Sales	$ 362.0	$ 712.1	$ 909.2	$ 1,371.8
Operating (loss) profit	(107.9)	75.9	(132.9)	120.8
Other income	0.1	1.3	0.2	1.4
Interest expense, net	(14.5)	0.0	(17.8)	0.0
(Loss) income before income taxes	(122.3)	77.2	(150.5)	122.2
Assets	6,665.2		6,665.2		$ 6,158.3
Other
Segment Reporting Information [Line Items]
Operating (loss) profit	(34.9)	(7.8)	(48.4)	(16.8)
Assets	853.6		853.6		239.2
Specialty Products & Technologies
Segment Reporting Information [Line Items]
Sales	184.6	347.3	457.2	696.1
Assets	3,693.5		3,693.5		3,662.5
Specialty Products & Technologies \| Operating segments
Segment Reporting Information [Line Items]
Sales	184.6	347.3	457.2	696.1
Operating (loss) profit	(19.2)	54.5	(11.4)	120.6
Equipment & Consumables
Segment Reporting Information [Line Items]
Sales	177.4	364.8	452.0	675.7
Assets	2,118.1		2,118.1		$ 2,256.6
Equipment & Consumables \| Operating segments
Segment Reporting Information [Line Items]
Sales	177.4	364.8	452.0	675.7
Operating (loss) profit	$ (53.8)	$ 29.2	$ (73.1)	$ 17.0

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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