Consolidated Statements Of Shareholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Capital In Excess Of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Shareholders' Equity [Member]
BALANCE at Feb. 28, 2017	$ 3,108,580	$ 93,274	$ 1,188,578	$ 1,883,283	$ (56,555)
BALANCE, SHARES at Feb. 28, 2017		186,549,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	664,112			664,112
Other comprehensive (loss) income	12,823				12,823
Share-based compensation expense	38,340		38,340
Repurchases of common stock	(573,638)	$ (4,448)	(58,455)	(510,735)
Repurchase of common stock, shares		(8,897,000)
Exercise of common stock options	73,520	$ 933	72,587
Exercise of common stock options, shares		1,866,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(6,888)	$ 115	(7,003)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		230,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	10,580			10,580	(10,580)	$ 0
BALANCE at Feb. 28, 2018	3,316,849	$ 89,874	1,234,047	2,047,240	(54,312)
BALANCE, SHARES at Feb. 28, 2018		179,748,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	842,413			842,413
Other comprehensive (loss) income	(13,698)				(13,698)
Share-based compensation expense	45,870		45,870
Repurchases of common stock	(903,101)	$ (6,817)	(97,913)	(798,371)
Repurchase of common stock, shares		(13,635,000)
Exercise of common stock options	58,131	$ 657	57,474
Exercise of common stock options, shares		1,314,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(2,300)	$ 25	(2,325)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		52,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				12,864		$ 12,864
BALANCE at Feb. 28, 2019	$ 3,357,028	$ 83,739	1,237,153	2,104,146	(68,010)
BALANCE, SHARES at Feb. 28, 2019	167,478,924	167,479,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 888,433			888,433
Other comprehensive (loss) income	(82,061)				(82,061)
Share-based compensation expense	48,122		48,122
Repurchases of common stock	(561,657)	$ (3,486)	(54,009)	(504,162)
Repurchase of common stock, shares		(6,971,000)
Exercise of common stock options	124,397	$ 1,207	123,190
Exercise of common stock options, shares		2,413,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(5,387)	$ 81	(5,468)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		160,000
BALANCE at Feb. 29, 2020	$ 3,768,875	$ 81,541	$ 1,348,988	$ 2,488,417	$ (150,071)
BALANCE, SHARES at Feb. 29, 2020	163,081,376	163,081,000