Consolidated Statements of Comprehensive Income (Loss) Consolidated Statement of Accumulated Other Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	Feb. 22, 2013	Feb. 24, 2012	Feb. 25, 2011
Statement of Accumulated Other Comprehensive Income [Abstract]
Accumulated other comprehensive income (loss), Unrealized gain (loss) on investments	$ 0.6	$ (1.0)	$ (0.6)
Accumulated other comprehensive income (loss), Minimum pension liability	18.9	19.7	19.8
Accumulated other comprehensive income (loss), Derivative adjustments	(0.1)	(0.1)	0
Accumulated other comprehensive income (loss), Foreign currency translation adjustments	(23.6)	(17.8)	(18.6)
Accumulated other comprehensive income (loss)	$ (4.2)	$ 0.8	$ 0.6