Inventory (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Feb. 27, 2016	Feb. 28, 2015	Feb. 27, 2016	Feb. 28, 2015	Mar. 01, 2014
Inventory
Inventories, last-in, first-out (LIFO) cost flow assumption	$ 1,006,396	$ 997,528	$ 1,006,396	$ 997,528
LIFO charge (credit)	$ 6,796	$ (23,489)	11,163	(18,857)	$ 104,142
Amount of decrease in the cost of revenues due to the effect of LIFO inventory liquidation			$ 60,653	$ 38,867	$ 13,894