Unaudited Quarterly Results (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 22, 2013	Nov. 23, 2012	Aug. 24, 2012	May 25, 2012	Feb. 24, 2012	Nov. 25, 2011	Aug. 26, 2011	May 27, 2011	Feb. 22, 2013	Feb. 24, 2012	Feb. 25, 2011
Unaudited Quarterly Results [Abstract]
Revenue	$ 721.4	$ 727.2	$ 744.9	$ 675.2	$ 690.2	$ 719.4	$ 700.5	$ 639.4	$ 2,868.7	$ 2,749.5	$ 2,437.1
Gross profit	216.0	225.9	228.1	196.0	205.6	219.8	201.2	183.1	866.0	809.7	717.5
Operating income (loss)	(45.2)	38.4	46.8	19.3	18.5	38.2	25.4	15.0	59.3	97.1	51.5
Net income	$ (27.5)	$ 23.6	$ 29.5	$ 13.2	$ 14.9	$ 22.4	$ 11.9	$ 7.5	$ 38.8	$ 56.7	$ 20.4
Earnings per share, basic	$ (0.22)	$ 0.19	$ 0.23	$ 0.10	$ 0.11	$ 0.17	$ 0.09	$ 0.06	$ 0.30	$ 0.43	$ 0.15
Earnings per share, diluted	$ (0.22)	$ 0.18	$ 0.23	$ 0.10	$ 0.11	$ 0.17	$ 0.09	$ 0.06	$ 0.30	$ 0.43	$ 0.15