Supplementary Cash Flow Data (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014	Mar. 02, 2013	Mar. 03, 2012
Supplementary Cash Flow Data
Cash paid for interest (net of capitalized amounts of $197, $399 and $315)	$ 414,692	$ 482,145	$ 528,894
Capitalized amount of interest	197	399	315
Cash payments (refund) for income taxes, net	3,191	(776)	4,913
Equipment financed under capital leases	18,065	7,906	7,052
Equipment received for noncash consideration	2,825	3,285	3,616
Preferred stock dividends paid in additional shares	8,318	10,528	9,919
Accrued capital expenditures	72,841	45,456	45,454
Gross borrowings from revolver	2,668,000	1,117,000	2,654,000
Gross repayments to revolver	$ 2,933,000	$ 588,000	$ 2,546,000