Quarterly Financial Information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2016	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information (unaudited)
Net Sales	$ 366.3	$ 364.7	$ 378.5	$ 347.2	$ 342.0	$ 341.1	$ 371.1	$ 344.2	$ 1,456.7	$ 1,398.4	$ 1,467.7
Gross profit	149.2	152.7	156.7	143.8	137.7	142.0	150.7	135.2	602.4	565.6	553.1
Net income	$ (2.3)	$ 26.5	$ 27.2	$ 21.7	$ 17.5	$ 21.9	$ 28.6	$ 16.2	$ 73.1	$ 84.2	$ (112.9)
BASIC EPS
Net income (in dollars per share)	$ (0.07)	$ 0.77	$ 0.79	$ 0.63	$ 0.51	$ 0.63	$ 0.83	$ 0.47	$ 2.12	$ 2.45	$ (3.24)
DILUTED EPS
Net income (in dollars per share)	(0.07)	0.77	0.79	0.63	0.51	0.63	0.83	0.47	2.12	2.44	(3.24)
Dividends declared per common share (in dollars per share)	$ 0.19	$ 0.19	$ 0.19	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.17	$ 0.75	$ 0.71	$ 0.66