Goodwill & Other Intangible Assets Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 22, 2013	Feb. 24, 2012	Feb. 25, 2011
Schedule of Intangible Assets by Major Class [Line Items]
Intangible asset impairment charges	$ 0	$ 0	$ 0
Intangible assets amortization expense	3.0	3.0	3.2
Finite-lived intangible assets, gross	53.2	66.4
Finite-lived intangible assets, accumulated amortization	46.6	60.2
Finite-lived intangible assets, net	6.6	6.2
Indefinite-lived intangible assets, gross	12.6	12.6
Indefinite-lived intangible assets, accumulated amortization	0	0
Indefinite-lived intangible assets, net	12.6	12.6
Other intangible assets, gross	65.8	79.0
Other intangible assets, net	19.2	18.8
Estimated Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense, 2014	2.4
Amortization expense, 2015	2.2
Amortization expense, 2016	1.3
Amortization expense, 2017	0.6
Amortization expense, 2018	0.1
Amortization Expense, 2014-2018 Total	6.6
Proprietary technology [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Weighted average useful life	9 years 8 months
Finite-lived intangible assets, gross	22.8	23.5
Finite-lived intangible assets, accumulated amortization	19.7	19.3
Finite-lived intangible assets, net	3.1	4.2
Trademarks [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Weighted average useful life	8 years 11 months
Finite-lived intangible assets, gross	13.3	29.7
Finite-lived intangible assets, accumulated amortization	13.3	29.3
Finite-lived intangible assets, net	0	0.4
Non-compete agreements [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Weighted average useful life	4 years 6 months
Finite-lived intangible assets, gross	2.6	2.3
Finite-lived intangible assets, accumulated amortization	2.4	2.3
Finite-lived intangible assets, net	0.2	0
Other [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Weighted average useful life	5 years 8 months
Finite-lived intangible assets, gross	14.5	10.9
Finite-lived intangible assets, accumulated amortization	11.2	9.3
Finite-lived intangible assets, net	$ 3.3	$ 1.6