Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Comprehensive Income
Balance at Feb. 28, 2009	$ 3,000,454	$ 3,147	$ 878,568	$ 4,154,921	$ (2,031,642)	$ (4,540)
Balance (in shares) at Feb. 28, 2009		314,678			(54,977)
Comprehensive Income (Loss):
Net earnings	600,033			600,033			600,033
Change in temporary impairment of auction rate securities, net of taxes	325					325	325
Pension adjustment, net of taxes	1,260					1,260	1,260
Currency translation adjustment	3,683					3,683	3,683
Comprehensive Income	605,301						605,301
Shares sold under employee stock option plans, net of taxes	96,476	45	96,431
Shares sold under employee stock option plans, net of taxes (in shares)		4,503
Issuance of restricted shares, net		14	(14)
Issuance of restricted shares, net (in shares)		1,369
Stock-based compensation expense, net	45,411		45,411
Director fees paid in stock	119		119
Director fees paid in stock (in shares)		3
Repurchase of common stock, including fees	(94,857)				(94,857)
Repurchase of common stock, including fees (in shares)	(2,678)				(2,678)
Balance at Feb. 27, 2010	3,652,904	3,206	1,020,515	4,754,954	(2,126,499)	728
Balance (in shares) at Feb. 27, 2010		320,553			(57,655)
Comprehensive Income (Loss):
Net earnings	791,333			791,333			791,333
Change in temporary impairment of auction rate securities, net of taxes	(663)					(663)	(663)
Pension adjustment, net of taxes	343					343	343
Currency translation adjustment	4,692					4,692	4,692
Comprehensive Income	795,705						795,705
Shares sold under employee stock option plans, net of taxes	125,096	38	125,058
Shares sold under employee stock option plans, net of taxes (in shares)		3,804
Issuance of restricted shares, net		9	(9)
Issuance of restricted shares, net (in shares)		863
Stock-based compensation expense, net	45,465		45,465
Director fees paid in stock	94		94
Director fees paid in stock (in shares)		2
Repurchase of common stock, including fees	(687,605)				(687,605)
Repurchase of common stock, including fees (in shares)	(15,901)				(15,901)
Balance at Feb. 26, 2011	3,931,659	3,253	1,191,123	5,546,287	(2,814,104)	5,100
Balance (in shares) at Feb. 26, 2011		325,222			(73,556)
Comprehensive Income (Loss):
Net earnings	989,537			989,537			989,537
Change in temporary impairment of auction rate securities, net of taxes	(297)					(297)	(297)
Pension adjustment, net of taxes	(4,596)					(4,596)	(4,596)
Currency translation adjustment	(2,086)					(2,086)	(2,086)
Comprehensive Income	982,558						982,558
Shares sold under employee stock option plans, net of taxes	179,592	46	179,546
Shares sold under employee stock option plans, net of taxes (in shares)		4,645
Issuance of restricted shares, net		7	(7)
Issuance of restricted shares, net (in shares)		706
Stock-based compensation expense, net	46,501		46,501
Director fees paid in stock	174		174
Director fees paid in stock (in shares)		3
Repurchase of common stock, including fees	(1,217,956)				(1,217,956)
Repurchase of common stock, including fees (in shares)	(21,505)				(21,505)
Balance at Feb. 25, 2012	$ 3,922,528	$ 3,306	$ 1,417,337	$ 6,535,824	$ (4,032,060)	$ (1,879)
Balance (in shares) at Feb. 25, 2012		330,576			(95,061)