Supplementary Cash Flow Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 04, 2017	Feb. 27, 2016	Feb. 28, 2015
Supplementary Cash Flow Data
Cash paid for interest (net of capitalized amounts of $194, $196 and $145)	$ 409,692	$ 403,727	$ 384,329
Capitalized amount of interest	195	196	145
Cash payments for income taxes, net	17,081	4,856	6,665
Equipment financed under capital leases	7,551	9,614	6,157
Equipment received for noncash consideration	746	3,011	1,600
Accrued capital expenditures	37,325	69,417	87,916
Gross borrowings from revolver	3,608,000	4,729,000	6,078,000
Gross repayments to revolver	$ 3,278,000	$ 4,354,000	$ 4,753,000