Schedule of 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
Selected Quarterly Financial Information [Abstract]
Net Sales	$ 1,033.1	$ 967.9	$ 898.0	$ 877.2	$ 896.0	$ 870.7	$ 877.4	$ 849.0	$ 3,776.2	$ 3,493.1	$ 3,394.8
Gross Profit	481.4	438.5	410.4	399.3	408.0	395.6	408.0	379.0	1,729.6	1,590.6	1,511.8
Income from Operations	214.7	198.7	123.2	196.1	173.4	196.0	175.3	179.5	732.7	724.2	674.2
Net Income	$ 405.6	$ 133.4	$ 72.9	$ 131.5	$ 110.4	$ 124.0	$ 111.6	$ 113.0	$ 743.4	$ 459.0	$ 410.4
Net Income per Share-Basic	$ 1.63	$ 0.53	$ 0.29	$ 0.52	$ 0.43	$ 0.48	$ 0.43	$ 0.44	$ 2.97	$ 1.78	$ 1.57
Net Income per Share-Diluted	$ 1.60	$ 0.52	$ 0.29	$ 0.51	$ 0.42	$ 0.47	$ 0.43	$ 0.43	$ 2.90	$ 1.75	$ 1.54