Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2015		Aug. 31, 2014		Aug. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 759.5	$ 683.7	$ 616.1	$ 647.4	$ 668.7	$ 603.9	$ 546.2	$ 574.7	$ 2,706.7	[1]	$ 2,393.5	[1]	$ 2,089.1	[1]
Gross Profit	321.3	295.6	255.7	273.0	283.5	243.4	215.2	237.1	1,145.6		979.2		837.6
Net Income	$ 60.1	$ 64.5	$ 46.4	$ 51.1	$ 54.8	$ 43.8	$ 32.7	$ 44.5	$ 222.1		$ 175.8		$ 127.4
Basic Earnings per Share (in dollars per share)	$ 1.39	$ 1.49	$ 1.07	$ 1.18	$ 1.27	$ 1.01	$ 0.76	$ 1.03	$ 5.13		$ 4.07		$ 2.97
Diluted Earnings per Share (in dollars per share)	$ 1.37	$ 1.48	$ 1.07	$ 1.17	$ 1.26	$ 1.01	$ 0.75	$ 1.03	$ 5.09		$ 4.05		$ 2.95

[1] Net sales are attributed to each country based on the selling location.