Stock And Stock-Based Incentive Plans (Cash-Settled Restricted Stock Unit Activity) (Details) - Cash-Settled Restricted Stock Units [Member] - $ / shares |
3 Months Ended | |
|---|---|---|
May. 31, 2015 |
May. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Outstanding at beginning of year, Number of Shares or Units | 1,530,000 | |
| Stock units granted, Number of Units | 418,070 | 587,186 |
| Stock units vested and converted, Number of Units | (514,000) | |
| Stock units cancelled, Number of Units | (23,000) | |
| Outstanding at end of year, number of shares or Units | 1,411,000 | |
| Outstanding as of February 28, 2015, Weighted Average Grant Date Fair Value | $ 39.81 | |
| Restricted stock granted, weighted average grant date fair value | 73.76 | $ 44.96 |
| Stock units vested and converted, Weighted Average Grant Date Fair Value | 31.77 | |
| Stock units cancelled, Weighted Average Grant Date Fair Value | 44.59 | |
| Outstanding as of May 31, 2015, Weighted Average Grant Date Fair Value | $ 52.72 | |