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Segment Information (Segment Results) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 659.3	$ 679.5	$ 2,031.1	$ 2,085.5
Operating profit	78.7	81.4	199.5	230.8
Identifiable assets	6,118.4		6,118.4		$ 5,841.6
Other
Segment Reporting Information [Line Items]
Operating profit	(7.0)	(7.0)	(23.8)	(19.7)
Identifiable assets	233.3		233.3		8.4
Specialty Products & Technologies
Segment Reporting Information [Line Items]
Sales	317.8	318.3
Specialty Products & Technologies \| Operating segments
Segment Reporting Information [Line Items]
Sales	317.8	318.3	1,013.9	1,022.6
Operating profit	54.6	51.5	175.2	186.7
Identifiable assets	3,665.2		3,665.2		3,539.1
Equipment & Consumables
Segment Reporting Information [Line Items]
Sales	341.5	361.2
Equipment & Consumables \| Operating segments
Segment Reporting Information [Line Items]
Sales	341.5	361.2	1,017.2	1,062.9
Operating profit	31.1	$ 36.9	48.1	$ 63.8
Identifiable assets	$ 2,219.9		$ 2,219.9		$ 2,294.1