Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Nov. 23, 2014	Nov. 24, 2013	Nov. 23, 2014	Nov. 24, 2013
Income Tax Disclosure [Abstract]
Effective income tax rate	43.60%	(233.30%)	49.00%	6.60%
Income tax (benefit) expense	$ (23.8)us-gaap_IncomeTaxExpenseBenefit	$ (4.2)us-gaap_IncomeTaxExpenseBenefit	$ (48.2)us-gaap_IncomeTaxExpenseBenefit	$ 3.4us-gaap_IncomeTaxExpenseBenefit
(Loss) earnings before income taxes	(54.6)	1.8	(98.3)	51.7
Tax position, change is reasonably possible in the next twelve months	$ 26.6		$ 26.6
Effective income tax rate, excluding debt extinguishment costs and debt extinguishment tax benefit (as a percent)	19.00%		19.00%

Effective Income Tax Rate Reconciliation, Excluding Extinguishment of Debt Cost and Tax Benefit, Percentage

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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