Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 22, 2013	Feb. 24, 2012	Feb. 25, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 38.8	$ 56.7	$ 20.4
Unrealized gain (loss) on investments	2.5	(0.7)	3.2
Minimum pension liability	0	0.5	15.9
Derivative adjustments	0	(0.2)	(0.6)
Foreign currency translation adjustments	(5.8)	0.8	5.6
Total other comprehensive income (loss), gross	(3.3)	0.4	24.1
Unrealized gain (loss) on investments	(0.9)	0.3	(1.2)
Minimum pension liability	(0.8)	(0.6)	(4.6)
Derivative adjustments	0	0.1	0.2
Foreign currency translation adjustments	0	0
Total other comprehensive income (loss), tax (expense) benefit	(1.7)	(0.2)	(5.6)
Unrealized gain (loss) on investments	1.6	(0.4)	2.0
Minimum pension liability	(0.8)	(0.1)	11.3
Derivative adjustments	0	(0.1)	(0.4)
Foreign currency translation adjustments	(5.8)	0.8	5.6
Total other comprehensive income (loss), net	(5.0)	0.2	18.5
Comprehensive income	$ 33.8	$ 56.9	$ 38.9