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Stock-Based Compensation (Outstanding and Exercisable Stock Options) (Details) (USD $)	Feb. 28, 2013
Options
Options outstanding at beginning and end of period	10,105,546
Options exercisable at end of period	8,538,707
Weighted Average Exercise Price
Options outstanding at beginning and end of period	$ 21.27
Options exercisable at end of period	$ 23.76

- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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