Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Quarterly Financial Data (Unaudited)
Net sales	$ 876.2	$ 973.1	$ 984.6	$ 709.3	$ 790.0	$ 904.1	$ 859.5	$ 650.4	$ 3,543.2		$ 3,204.0		$ 2,943.0
Gross profit	252.8	295.5	285.4	173.0	195.7	237.1	224.6	162.1	1,006.7		819.5
Other expenses	127.1	133.7	137.4	106.6	106.7	103.1	102.3	99.1	504.8		411.2
Earnings before interest and income taxes	125.7	161.8	148.0	66.4	89.0	134.0	122.3	63.0	501.9		408.3		366.8
Income from continuing operations, net of tax	$ 81.7	$ 103.6	$ 94.8	$ 39.5	$ 53.2	$ 86.3	$ 75.7	$ 36.5	$ 319.6		$ 251.7		$ 235.2
Basic earnings per share from continuing operations (in dollars per share)	$ 1.25	$ 1.59	$ 1.45	$ 0.60	$ 0.81	$ 1.34	$ 1.17	$ 0.57	$ 4.89		$ 3.89		$ 3.69
Diluted earnings per share from continuing operations (in dollars per share)	$ 1.24	$ 1.56	$ 1.43	$ 0.59	$ 0.81	$ 1.31	$ 1.15	$ 0.56	$ 4.82		$ 3.83		$ 3.61
Income (loss) from discontinued operations, net of tax	$ 0.1		$ 0.1	$ (0.1)	$ (0.2)	$ 1.0	$ (0.5)	$ (0.7)	$ 0.1		$ (0.4)		$ (25.5)
Basic income per share from discontinued operations (in dollars per share)					$ 0.01	$ 0.01	$ (0.01)	$ (0.01)					$ (0.40)	[1]
Diluted income per share from discontinued operations (in dollars per share)						$ 0.01	$ (0.01)	$ (0.01)			$ (0.01)	[1]	(0.39)	[1]
Net income	$ 81.8	$ 103.6	$ 94.9	$ 39.4	$ 53.0	$ 87.3	$ 75.2	$ 35.8	$ 319.7		$ 251.3
Basic earnings per share	$ 1.25	$ 1.59	$ 1.45	$ 0.60	$ 0.82	$ 1.35	$ 1.16	$ 0.56	$ 4.89	[1]	$ 3.89	[1]	3.29	[1]
Diluted earnings per share (in dollars per share)	1.24	1.56	1.43	0.59	0.81	1.32	1.14	0.55	4.82	[1]	3.82	[1]	3.22	[1]
Dividends earnings per share (in dollars per share)	0.30	0.30	0.25	0.25	0.25	0.25	0.22	0.22	$ 1.10		$ 0.94		$ 0.84
Stock price:
High (in dollars per share)	92.70	104.60	102.26	95.10	92.06	88.36	88.19	80.57
Low (in dollars per share)	$ 84.11	$ 86.91	$ 91.87	$ 86.79	$ 74.69	$ 78.93	$ 75.28	$ 71.51

[1] Earning per share calculated based on the twoclass method. See Note 7 for detailed calculations.