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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.

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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