NONCONTROLLING INTERESTS AND REDEEMABLE NONCONTROLLING INTERESTS - Effects of Change in the Ownership Percentage of Noncontrolling Interest on Net Income (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Noncontrolling Interest [Line Items]
Net income attributable to Coty Inc.	$ 232.5	$ (97.4)	$ 168.0
Net (loss) income attributable to Coty Inc. and transfers from NCI	232.5	(101.6)	168.0
HONG KONG
Noncontrolling Interest [Line Items]
Decrease in APIC for purchase of Hong Kong NCI	$ 0.0	$ (4.2)	$ 0.0