Stock And Stock-Based Incentive Plans (Stock Option Activity) (Details) - Stock Option [Member] - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
May. 31, 2015 |
May. 31, 2014 |
| Outstanding as of February 28, 2015, Number of Shares |
7,645,000
|
|
| Options granted, Number of Shares |
1,374,013
|
2,003,238
|
| Options exercised, Number of Shares |
(1,195,000)
|
|
| Outstanding as of May 31, 2015, Number of Shares |
7,824,000
|
|
| Exercisable as of May 31, 2015, Number of Shares |
3,925,000
|
|
| Outstanding as of February 28, 2015, Weighted Average Exercise Price |
$ 35.59
|
|
| Options granted, Weighted Average Exercise Price |
73.76
|
|
| Options exercised, Weighted Average Exercise Price |
28.71
|
|
| Outstanding as of May 31, 2015, Weighted Average Exercise Price |
43.35
|
|
| Exercisable as of May 31, 2015, Weighted Average Exercise Price |
$ 33.48
|
|
| SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 |
4 years 9 months 18 days
|
|
| Exercisable as of May 31, 2015, Weighted Average Remaining Contractual Life (Years) |
3 years 8 months 12 days
|
|
| Outstanding as of May 31, 2015, Aggregate Intrinsic Value |
$ 220,377
|
|
| Exercisable as of May 31, 2015, Aggregate Intrinsic Value |
$ 147,433
|
|