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Earnings Per Share Earnings Per Share - Schedule of Calculation of Numerator and Denominator in Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Mar. 01, 2014	Feb. 28, 2015	Mar. 01, 2014
Earnings Per Share [Abstract]
Numerator for both basic and diluted EPS, net earnings - in millions	$ 21.0us-gaap_NetIncomeLoss	$ 19.4us-gaap_NetIncomeLoss	$ 74.1us-gaap_NetIncomeLoss	$ (38.7)us-gaap_NetIncomeLoss
Denominator for basic EPS, weighted-average common shares outstanding	59,550,289us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	59,014,789us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	59,430,575us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	58,888,514us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Potentially dilutive shares resulting from stock plans	547,900us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment	638,628us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment	566,292us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment	0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Denominator for diluted EPS	60,098,189us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	59,653,417us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	59,996,867us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	58,888,514us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Antidilutive equity awards not included in weighted-average common shares - diluted	676,405us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	780,800us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	703,364us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2,782,663us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

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-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752



Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Publisher FASB

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-Topic 230

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Other Comprehensive Income

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Net Income

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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