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Investments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 31, 2012	Feb. 28, 2013
Noncontrolling Interest, Ownership Percentage by Parent		15.00%
Equity Method Investment, Ownership Percentage		26.20%
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net (in Dollars)	$ 1.3

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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