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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 28, 2015
Mar. 29, 2014
Income Taxes [Abstract]        
Unrecognized tax benefits $ 37.4us-gaap_UnrecognizedTaxBenefits   $ 37.4us-gaap_UnrecognizedTaxBenefits  
Liability recorded for interest and penalties related to unrecognized tax benefits 33.4us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued   33.4us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued  
Effective income tax rate 33.56%us-gaap_EffectiveIncomeTaxRateContinuingOperations 39.01%us-gaap_EffectiveIncomeTaxRateContinuingOperations 34.67%us-gaap_EffectiveIncomeTaxRateContinuingOperations 36.99%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Net increase (reduction) in income tax expense related to disqualifying dispositions   (1.0)syy_IncomeTaxReconciliationDisqualifyingDispositions   (6.2)syy_IncomeTaxReconciliationDisqualifyingDispositions
Net increase (reduction) in income tax expense related to federal and state uncertain tax positions   $ (6.2)us-gaap_IncomeTaxReconciliationTaxContingenciesDomestic   $ (4.7)us-gaap_IncomeTaxReconciliationTaxContingenciesDomestic