Stock And Stock-Based Incentive Plans (Assumptions Used To Estimate Option Values) (Details)	9 Months Ended
	Nov. 30, 2013		Nov. 30, 2012
Stock And Stock-Based Incentive Plans [Abstract]
Dividend yield	0.00%		0.00%
Expected volatility factor, Minimum	27.90%	[1]	31.10%	[1]
Expected volatility factor, Maximum	46.80%	[1]	51.40%	[1]
Weighted average expected volatility	44.70%		49.40%
Risk-free interest rate, Minimum	0.02%	[2]	0.02%	[2]
Risk-free interest rate, Maximum	2.60%	[2]	2.00%	[2]
Expected term (in years)	4 years 8 months 12 days	[3]	4 years 8 months 12 days	[3]

[1] (1)Measured using historical daily price changes of our stock for a period corresponding to the term of the options and the implied volatility derived from the market prices of traded options on our stock.

[2] Based on the U.S. Treasury yield curve in effect at the time of grant.

[3] Represents the estimated number of years that options will be outstanding prior to exercise.