Revenue, Receivables and Contract Assets and Liabilities Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 29, 2021	Feb. 27, 2021	Feb. 29, 2020
Credit Loss [Abstract]
Accounts Receivable, Allowance for Credit Loss	$ 2,255	$ 1,947	$ 2,469
Additions charged to costs and expenses	332	389
Deductions from allowance, net of recoveries	(69)	(887)
Other changes (1)	$ 45	$ (24)