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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Accounting Policies [Abstract]          
Effective income tax rate, percent 15.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations 14.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations 14.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations (328.30%)us-gaap_EffectiveIncomeTaxRateContinuingOperations  
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions   $ 38.1us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions      
U.S. federal statutory rate, percent     35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate    
Gross unrecognized tax benefits 318.5us-gaap_UnrecognizedTaxBenefits   318.5us-gaap_UnrecognizedTaxBenefits   400.5us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits that would impact effective tax rate 77.1us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate   77.1us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate    
Unrecognized tax benefits, net 90.3coty_UnrecognizedTaxBenefitsLiabilityIncludingIncomeTaxPenaltiesandInterestAccrued   90.3coty_UnrecognizedTaxBenefitsLiabilityIncludingIncomeTaxPenaltiesandInterestAccrued   159.4coty_UnrecognizedTaxBenefitsLiabilityIncludingIncomeTaxPenaltiesandInterestAccrued
Total interest and penalties 0.7us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense (3.8)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense (2.5)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense (1.4)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense  
Gross accrued interest and penalties 18.8us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued   18.8us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued   25.5us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Reasonably possible decrease in UTB's $ 3.1us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound   $ 3.1us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound