Stock And Stock-Based Incentive Plans (Stock Option Activity) (Details) (Stock Option [Member], USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Stock Option [Member]
Outstanding as of February 28, 2013, Number of Shares	10,771,000
Options granted, Number of Shares	1,605,149	2,252,124
Options exercised, Number of Shares	(1,328,000)
Options forfeited or expired, Number of Shares	(19,000)
Outstanding as of November 30, 2013, Number of Shares	11,029,000
Exercisable as of November 30, 2013, Number of Shares	6,854,000
Outstanding as of February 28, 2013, Weighted Average Exercise Price	$ 23.00
Options granted, Weighted Average Exercise Price	$ 42.77
Options exercised, Weighted Average Exercise Price	$ 19.60
Options forfeited or expired, Weighted Average Exercise Price	$ 26.25
Outstanding as of November 30, 2013, Weighted Average Exercise Price	$ 26.29
Exercisable as of November 30, 2013, Weighted Average Exercise Price	$ 20.68
Outstanding as of November 30, 2013, Weighted Average Remaining Contractual Life (Years)	3 years 8 months 12 days
Exercisable as of November 30, 2013, Weighted Average Remaining Contractual Life (Years)	2 years 8 months 12 days
Outstanding as of November 30, 2013, Aggregate Intrinsic Value	$ 272,568
Exercisable as of November 30, 2013, Aggregate Intrinsic Value	$ 207,819