Consolidated Statements Of Shareholders’ Equity (USD $) In Thousands	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
BALANCE at Feb. 28, 2011	$ 112,943	$ 820,639	$ 1,330,724	$ (25,057)	$ 2,239,249
BALANCE, SHARES at Feb. 28, 2011	225,886
Net earnings	0	0	413,795	0	413,795
Other comprehensive income (loss)	0	0	0	(37,402)	(37,402)
Share-based compensation expense	0	32,105	0	0	32,105
Exercise of common stock options	759	24,494	0	0	25,253
Exercise of common stock options, shares	1,519
Shares issued under stock incentive plans	10	540	0	0	550
Shares issued under stock incentive plans, shares	20
Shares cancelled under stock incentive plans	(153)	(9,523)	0	0	(9,676)
Shares cancelled under stock incentive plans, shares	(306)
Tax effect from the exercise of common stock options	0	9,238	0	0	9,238
BALANCE at Feb. 29, 2012	113,559	877,493	1,744,519	(62,459)	2,673,112
BALANCE, SHARES at Feb. 29, 2012	227,119
Net earnings	0	0	434,284	0	434,284
Other comprehensive income (loss)	0	0	0	2,651	2,651
Share-based compensation expense	0	37,294	0	0	37,294
Repurchase of common stock	(2,881)	(24,066)	(185,031)		(211,978)
Repurchase of common stock, shares	(5,762)
Exercise of common stock options	2,008	69,737	0	0	71,745
Exercise of common stock options, shares	4,016
Shares issued under stock incentive plans	395	155	0	0	550
Shares issued under stock incentive plans, shares	791
Shares cancelled under stock incentive plans	(128)	(8,221)	0	0	(8,349)
Shares cancelled under stock incentive plans, shares	(258)
Tax effect from the exercise of common stock options	0	19,858	0	0	19,858
BALANCE at Feb. 28, 2013	112,953	972,250	1,993,772	(59,808)	3,019,167
BALANCE, SHARES at Feb. 28, 2013	225,906
Net earnings	0	0	492,586	0	492,586
Other comprehensive income (loss)	0	0	0	13,537	13,537
Share-based compensation expense	0	36,429	0	0	36,429
Repurchase of common stock	3,430	30,566	272,142	0	306,138
Repurchase of common stock, shares	(6,860)
Exercise of common stock options	1,168	43,977	0	0	45,145
Exercise of common stock options, shares	2,337
Shares issued under stock incentive plans	227	273	0	0	500
Shares issued under stock incentive plans, shares	453
Shares cancelled under stock incentive plans	(75)	(6,071)	0	0	(6,146)
Shares cancelled under stock incentive plans, shares	(150)
Tax effect from the exercise of common stock options	0	21,917	0	0	21,917
BALANCE at Feb. 28, 2014	$ 110,843	$ 1,038,209	$ 2,214,216	$ (46,271)	$ 3,316,997
BALANCE, SHARES at Feb. 28, 2014	221,686