Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,003.6	$ 1,035.1	$ 1,012.1	$ 995.4	$ 988.0	$ 1,027.2	$ 1,021.3	$ 967.9	$ 4,046.2	$ 4,004.4	$ 4,071.4
Gross profit	193.7	207.7	185.9	197.9	215.6	224.8	217.0	208.8	785.2	866.2	873.4
Income from continuing operations									94.0	236.2	241.9
Income (loss) from discontinued operations, net of tax									0.0	0.0	(2.6)
Net income	$ (40.7)	$ 55.6	$ 28.0	$ 51.1	$ 60.5	$ 68.6	$ 50.9	$ 56.2	$ 94.0	$ 236.2	$ 239.3
Income from continuing operations, per basic share									$ 1.03	$ 2.51	$ 2.50
Income (loss) from discontinued operations, per basic share									0.00	0.00	(0.03)
Net income, per basic share	$ (0.44)	$ 0.61	$ 0.31	$ 0.55	$ 0.65	$ 0.73	$ 0.54	$ 0.59	1.03	2.51	2.47
Income from continuing operations, per diluted share								0.59	1.02	2.48	2.47
Income (loss) from discontinued operations, per diluted share									0.00	0.00	(0.03)
Net income, per diluted share	$ (0.44)	$ 0.61	$ 0.30	$ 0.55	$ 0.64	$ 0.72	$ 0.53	$ 0.59	$ 1.02	$ 2.48	$ 2.44