Commitments and Contingent Liabilities (Details Textual) - USD ($)	9 Months Ended
	Nov. 28, 2020	Feb. 29, 2020
Commitments and Contingencies Disclosure [Abstract]
Face value of performance bonds	$ 1,100,000,000
Companies Backlog Related to Sales	527,800,000
Line of Credit Facility [Line Items]
Project related liability	3,300,000	$ 49,000,000.0
Net benefit	12,300
Purchase obligations	$ 207,500,000