Note 14 - Summary of Quarterly Results (Unaudited) - Summary of Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Feb. 25, 2017		Nov. 26, 2016		Aug. 27, 2016		May 28, 2016		Feb. 27, 2016		Nov. 28, 2015		Aug. 29, 2015		May 30, 2015		Feb. 25, 2017	Feb. 27, 2016	Feb. 28, 2015
Net sales	$ 3,533,954		$ 2,955,484		$ 2,988,235		$ 2,738,084		$ 3,417,892		$ 2,952,031		$ 2,995,469		$ 2,738,495		$ 12,215,757	$ 12,103,887	$ 11,881,176
Gross profit	1,343,091		1,092,774		1,116,893		1,023,592		1,319,916		1,115,311		1,140,950		1,044,133		4,576,350	4,620,310	4,619,779
Operating profit	429,928		211,283		280,973		213,026		498,582		292,858		350,194		273,269		1,135,210	1,414,903	1,554,293
Earnings before provision for income taxes	413,141		193,029		262,774		196,711		474,130		274,806		325,141		253,368		1,065,655	1,327,445	1,503,835
Provision for income taxes	144,411		66,605		95,439		74,092		170,586		96,990		123,463		94,917		380,547	485,956	546,361
Net earnings	$ 268,730		$ 126,424		$ 167,335		$ 122,619		$ 303,544		$ 177,816		$ 201,678		$ 158,451		$ 685,108	$ 841,489	$ 957,474
EPS-Basic (in dollars per share)	$ 1.86	[1]	$ 0.86	[1]	$ 1.12	[1]	$ 0.81	[1]	$ 1.93	[1]	$ 1.10	[1]	$ 1.22	[1]	$ 0.94	[1]	$ 4.61	$ 5.15	$ 5.13
EPS-Diluted (in dollars per share)	1.84	[1]	0.85	[1]	1.11	[1]	0.80	[1]	1.91	[1]	1.09	[1]	1.21	[1]	0.93	[1]	4.58	5.10	5.07
Dividends declared per share (in dollars per share)	$ 0.125		$ 0.125		$ 0.125		$ 0.125										$ 0.50

[1] Net earnings per share ("EPS") amounts for each quarter are required to be computed independently and may not equal the amount computed for the total year.