Stock And Stock-Based Incentive Plans (Composition Of Share-Based Compensation Expense - By Grant Type) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	$ 67,670	$ 63,174	$ 49,104
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	23,914	24,853	21,581
Cash-Settled Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	29,551	24,268	15,435
Stock-Settled Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	12,515	12,441	10,360
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	1,190	1,062	1,015
Stock Grants To Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	500	550	550
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, before income taxes	$ 0	$ 0	$ 163