Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Income Statement [Abstract]
Net sales	$ 662.2	$ 526.8	$ 1,899.4	$ 1,597.0
Costs and expenses
Cost of sales	405.8	317.0	1,178.3	978.0
Selling, general and administrative expenses	163.5	141.0	483.9	435.7
Total costs and expenses	569.3	458.0	1,662.2	1,413.7
Operating income	92.9	68.8	237.2	183.3
Interest and debt expense, net	(8.2)	(5.6)	(25.5)	(17.2)
Other income/(expense), net	(3.0)	(0.8)	(13.0)	15.1
Income before income taxes	81.7	62.4	198.7	181.2
Provision for income taxes	12.7	10.4	39.1	43.3
Net income	$ 69.0	$ 52.0	$ 159.6	$ 137.9
Basic earnings per common share:
Basic earnings per common share (in USD per share)	$ 1.95	$ 1.50	$ 4.53	$ 4.00
Weighted average common shares outstanding (in shares)	35.3	34.7	35.2	34.5
Diluted earnings per common share:
Diluted earnings per common share (in USD per share)	$ 1.90	$ 1.46	$ 4.41	$ 3.90
Weighted average diluted common shares outstanding (in shares)	36.4	35.6	36.2	35.4