Treasury Stock (Details) - Schedule of repurchase of common stock - USD ($)	3 Months Ended	12 Months Ended		60 Months Ended
	Aug. 31, 2015	Sep. 30, 2010		Aug. 31, 2015	Jul. 22, 2015	Oct. 01, 2009
Stockholders' Equity Attributable to Parent [Abstract]
September 2010		$ 44,000,000	[1]			$ 200,000,000
Additional authorization July 2015					$ 50,000,000
Less repurchases made under the authorization as of September 2010	$ 0	$ (156,000,000)		$ (34,100,000)
Remaining Board authorization at August 31, 2015	$ 59,900,000			$ 59,900,000

[1] Represents the remainder of a $200.0 authorization after giving effect to the purchase of 5,199,699 shares at $30.00 per share pursuant to a large share repurchase in the form of a modified Dutch auction tender offer that was completed by the Company on November 3, 2010 for a total cost of $156.0 , excluding related fees and expenses.