Goodwill & Other Intangible Assets Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 22, 2013
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]
Intangible asset impairment charges		$ 0
Intangible assets amortization expense	2.1	3.0
Finite-lived intangible assets, gross	45.8	53.2
Finite-lived intangible assets, accumulated amortization	41.8	46.6
Finite-lived intangible assets, net	4.0	6.6
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	58.4	65.8
Other intangible assets, net	16.6	19.2
Estimated Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense, 2014	1.7
Amortization expense, 2015	1.5
Amortization expense, 2016	0.6
Amortization expense, 2017	0.2
Amortization expense, 2018	0
Amortization Expense, 2014-2018 Total	4.0
Proprietary technology [Member]
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]
Weighted average useful life	9 years 8 months
Finite-lived intangible assets, gross	22.8	22.8
Finite-lived intangible assets, accumulated amortization	20.8	19.7
Finite-lived intangible assets, net	2.0	3.1
Trademarks [Member]
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]
Weighted average useful life	10 years 0 months
Finite-lived intangible assets, gross	10.7	13.3
Finite-lived intangible assets, accumulated amortization	10.7	13.3
Finite-lived intangible assets, net	0	0
Non-compete agreements [Member]
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]
Weighted average useful life	6 years 1 month
Finite-lived intangible assets, gross	1.3	2.6
Finite-lived intangible assets, accumulated amortization	1.1	2.4
Finite-lived intangible assets, net	0.2	0.2
Other [Member]
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]
Weighted average useful life	5 years 3 months
Finite-lived intangible assets, gross	11.0	14.5
Finite-lived intangible assets, accumulated amortization	9.2	11.2
Finite-lived intangible assets, net	$ 1.8	$ 3.3