Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data (Unaudited)
Net sales	$ 893.5	$ 991.0	$ 996.9	$ 794.0	$ 876.2	$ 973.1	$ 984.6	$ 709.3	$ 3,675.4	$ 3,543.2	$ 3,204.0
Gross profit	267.1	323.6	321.2	245.4	252.8	295.5	285.4	173.0	1,157.3	1,006.7
Earnings before interest and income taxes	115.2	36.4	178.9	110.6	125.7	161.8	148.0	66.4	441.1	501.9	408.3
Income from continuing operations, net of tax	$ 76.5	$ (9.5)	$ 115.3	$ 68.5	$ 81.7	$ 103.6	$ 94.8	$ 39.5	$ 250.8	$ 319.6	$ 251.7
Basic earnings per share from continuing operations (in dollars per share)	$ 1.18	$ (0.15)	$ 1.78	$ 1.06	$ 1.25	$ 1.59	$ 1.45	$ 0.60	$ 3.87	$ 4.89	$ 3.89
Diluted earnings per share from continuing operations (in dollars per share)	$ 1.17	$ (0.15)	$ 1.75	$ 1.05	$ 1.24	$ 1.56	$ 1.43	$ 0.59	$ 3.83	$ 4.82	$ 3.83
Income (loss) from discontinued operations, net of tax									$ (0.7)	$ 0.1	$ (0.4)
Basic income per share from discontinued operations (in dollars per share)									$ (0.01)
Diluted income per share from discontinued operations (in dollars per share)									$ (0.01)		$ (0.01)
Net income	$ 76.2	$ (9.8)	$ 115.2	$ 68.5	$ 81.8	$ 103.6	$ 94.9	$ 39.4	$ 250.1	$ 319.7
Basic earnings per share									$ 3.86	$ 4.89	3.89
Diluted earnings per share (in dollars per share)									3.82	4.82	3.82
Dividends earnings per share (in dollars per share)									$ 1.30	$ 1.10	$ 0.94