Note 11. Stockholders' Equity (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
Jun. 13, 2011	Nov. 30, 2011	Nov. 30, 2010	Aug. 31, 2011
StockRepurchaseProgramIncreaseInAuthorizedAmount	$ 200
Stock Repurchased During Period, Shares (in Shares)		150,000	303,000
Stock Repurchased During Period, Value		14.6
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 128
Preferred Stock, Shares Authorized (in Shares)		10,000,000		10,000,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)		$ 0.01		$ 0.01

Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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