COMMITMENTS AND CONTINGENCIES - Business Acquisitions (Details) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
	Mar. 31, 2016 USD ($) brand $ / shares shares	Mar. 31, 2016 USD ($) brand $ / shares	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($) brand $ / shares	Mar. 31, 2015 USD ($)	Jul. 09, 2015 brand	Jul. 08, 2015 USD ($) $ / shares
Business Acquisition [Line Items]
Acquisition-related costs		$ 37.0	$ 0.3	$ 98.3	$ 1.9
Acquisition-related Costs
Business Acquisition [Line Items]
Acquisition-related costs		37.0	$ 0.3	98.3	$ 1.9
Planned Merger with P&G Beauty Brands
Business Acquisition [Line Items]
Number of beauty brands | brand						43
Debt assumed	$ 2,000.0	$ 2,000.0		$ 2,000.0			$ 2,900.0
Amount of adjustment							$ 1,000.0
Number of shares | shares	412.3
Percentage of diluted equity							54.00%
Number of brands | brand	2	2		2
Estimated value of transaction	$ 13,500.0	$ 13,500.0		$ 13,500.0
Business Acquisition, Share Price | $ / shares	$ 27.83	$ 27.83		$ 27.83
Value of combined company	$ 11,500.0	$ 11,500.0		$ 11,500.0
Collar amount of debt based on closing price of Coty common stock on March 31, 2016	1,900.0
Increase in connection with certain other adjustments	$ 100.0
Planned Merger with P&G Beauty Brands | Acquisition-related Costs
Business Acquisition [Line Items]
Acquisition-related costs		$ 35.1		$ 91.1
Planned Merger with P&G Beauty Brands | Minimum
Business Acquisition [Line Items]
Debt assumed							$ 1,900.0
Assumed debt per share of Coty's stock (in dollars per share) | $ / shares							$ 22.06
Planned Merger with P&G Beauty Brands | Maximum
Business Acquisition [Line Items]
Debt assumed							$ 3,900.0
Assumed debt per share of Coty's stock (in dollars per share) | $ / shares							$ 27.06