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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Feb. 28, 2015
Mar. 01, 2014
Feb. 28, 2015
Mar. 01, 2014
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate, Continuing Operations 33.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations 33.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations 33.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations 41.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate  
Liability for Uncertain Tax Positions, Current $ 1.5us-gaap_LiabilityForUncertainTaxPositionsCurrent $ 1.7us-gaap_LiabilityForUncertainTaxPositionsCurrent $ 1.5us-gaap_LiabilityForUncertainTaxPositionsCurrent $ 1.7us-gaap_LiabilityForUncertainTaxPositionsCurrent
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense 0.2us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 0.3us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 0.9us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued $ 0.7us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued $ 0.9us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued $ 0.7us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued