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Stock And Stock-Based Incentive Plans (Stock-Settled Restricted Stock Unit Activity) (Details) (Stock-Settled Restricted Stock Units [Member], USD $)
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3 Months Ended | |
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May 31, 2014
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May 31, 2013
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Stock-Settled Restricted Stock Units [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Outstanding at beginning of year, Number of Shares or Units | 852,000 | |
| Stock units granted, Number of Units | 245,190 | 235,459 |
| Stock units vested and converted, Number of Units | (281,000) | |
| Stock units cancelled, Number of Units | 0 | |
| Outstanding at end of year, number of shares or Units | 816,000 | |
| Outstanding as of February 28, 2014, Weighted Average Grant Date Fair Value | $ 45.26 | |
| Stock units granted, weighted average grant date fair value | $ 55.37 | $ 51.95 |
| Stock units vested and converted, Weighted Average Grant Date Fair Value | $ 45.57 | |
| Stock units cancelled, Weighted Average Grant Date Fair Value | $ 0.00 | |
| Outstanding as of May 31, 2014, Weighted Average Grant Date Fair Value | $ 48.19 | |