Note 8 - Provision for Income Taxes (Details Textual) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 03, 2018 USD ($)	Mar. 02, 2019	Mar. 03, 2018 USD ($)	Feb. 25, 2017 USD ($)	Feb. 27, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			32.66%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 10.5
Provisional Tax Impact Due to Tax Act	26.8		$ 26.8
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	75.4		75.4	$ 76.3
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 9.6		9.6	8.1
Unrecognized Tax Benefits, Interest on Income Taxes Expense			$ 1.5	$ 2.4
Number of States in which Entity Operates	50		50
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent			4.12%	3.25%	3.07%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent			3.86%
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent, Total			0.32%	0.28%	0.07%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent			2.03%	2.82%	1.53%
Minimum [Member]
Income Tax Examination Number of Years Under Examination			3 years
Maximum [Member]
Income Tax Examination Number of Years Under Examination			5 years
Expiration Of Statutes Of Limitations [Member]
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 12.0		$ 12.0
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards, Net of Tax	4.6		4.6
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Net of Tax	4.0		4.0
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Enterprise Zone Credit [Member]
Tax Credit Carryforward, Amount, Net of Tax	2.3		2.3
Other Current Assets [Member]
Deferred Tax Assets, Net, Current	$ 11.0		$ 11.0	$ 195.5
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%