Income Taxes Income Tax Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 27, 2015	Feb. 28, 2014	Feb. 22, 2013	Feb. 25, 2011
Liability for Uncertain Tax Positions [Abstract]
Liability for uncertain tax positions, current	$ 0	$ 0
Liability for uncertain tax positions, noncurrent	0.2	2.2
Liability for uncertain tax positions, total	0.2	2.2
liability for uncertain tax positions, change in amount	2.0
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning of period	12.7us-gaap_UnrecognizedTaxBenefits	12.2us-gaap_UnrecognizedTaxBenefits		11.5us-gaap_UnrecognizedTaxBenefits
Gross increases - tax positions in prior period	0	0.4	1.6
Gross decreases - tax positions in prior period	(1.9)	0	(0.9)
Gross increases - tax positions in current period	0	0.1	0
Lapse of statute of limitations	(2.0)	0	0
Unrecognized tax benefits, end of period	8.8us-gaap_UnrecognizedTaxBenefits	12.7us-gaap_UnrecognizedTaxBenefits	12.2us-gaap_UnrecognizedTaxBenefits	11.5us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits - Other Information [Abstract]
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward	8.6
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 0.2

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The total amount recognized for uncertain tax positions as of the balance sheet date.

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The current portion of the amount recognized for uncertain tax positions as of the balance sheet date.

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The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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Amount of an unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward. This amount is presented as a reduction of the related deferred tax asset in the balance sheet if that deferred tax asset is not used. This amount is presented separately from the deferred tax asset for a net operating loss carryforward if this unrelated tax benefit is associated with a different tax position.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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