Note 14 - Stock-based Compensation - Assumptions Used to Estimate the Black-scholes Fair Value of Stock Options Granted (Details) - Employee Stock Option [Member]		12 Months Ended
		Mar. 03, 2018	Feb. 25, 2017	Feb. 27, 2016
Weighted Average Expected Life (in years) (Year)	[1],[2]	6 years 255 days	6 years 219 days	6 years 255 days
Weighted Average Expected Volatility	[1],[3]	26.49%	26.96%	27.59%
Weighted Average Risk Free Interest Rates	[1],[4]	2.17%	1.46%	1.93%
Expected Dividend Yield	[1],[5]	1.60%	1.10%

[1] Forfeitures are estimated based on historical experience.

[2] The expected life of stock options is estimated based on historical experience.

[3] Expected volatility is based on the average of historical and implied volatility. The historical volatility is determined by observing actual prices of the Company's stock over a period commensurate with the expected life of the awards. The implied volatility represents the implied volatility of the Company's call options, which are actively traded on multiple exchanges, had remaining maturities in excess of twelve months, had market prices close to the exercise prices of the employee stock options and were measured on the stock option grant date.

[4] Based on the U.S. Treasury constant maturity interest rate whose term is consistent with the expected life of the stock options.

[5] Expected dividend yield is estimated based on anticipated dividend payouts.