Retirement Plans (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 03, 2012	Feb. 26, 2011	Feb. 27, 2010
Defined Benefit Plans
Multiemployer plans total expenses recognized	$ 14,594	$ 19,053	$ 19,328
Defined Benefit Pension Plan
Future benefit payments expected to be paid in Fiscal Year
2013	6,273
2014	6,440
2015	6,650
2016	6,849
2017	7,084
2018-2022	40,149
Total	73,445
Nonqualified Executive Retirement Plan
Future benefit payments expected to be paid in Fiscal Year
2013	1,662
2014	1,641
2015	1,581
2016	1,520
2017	1,321
2018-2022	4,683
Total	$ 12,408