Note 12 - Changes in the Company's Stock Options (Details) - Employee Stock Option [Member] shares in Thousands	12 Months Ended
	Feb. 27, 2016 $ / shares shares
Options outstanding, beginning of period (in shares) | shares	3,682
Options outstanding, beginning of period (in dollars per share) | $ / shares	$ 51.05
Granted (in shares) | shares	501
Granted (in dollars per share) | $ / shares	$ 70.96
Exercised (in shares) | shares	(255)
Exercised (in dollars per share) | $ / shares	$ 35.10
Forfeited or expired (in shares) | shares	(90)
Forfeited or expired (in dollars per share) | $ / shares	$ 63.12
Options outstanding, end of period (in shares) | shares	3,838
Options outstanding, end of period (in dollars per share) | $ / shares	$ 54.43
Options exercisable, end of period (in shares) | shares	2,358
Options exercisable, end of period (in dollars per share) | $ / shares	$ 47.06