CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 118.6	$ 52.1	$ 102.5	$ 61.9
Other comprehensive income:
Foreign currency translation adjustment	32.0	(90.4)	271.1	(96.3)
Net unrealized derivative gains on cash flow hedges, net of taxes of $(3.9) and $(8.8), and $(4.0) and $(8.7) during the three and six months ended, respectively	7.4	33.4	7.3	41.9
Pension and other post-employment benefits adjustment, net of tax of $0.0 and $(5.0), and $0.0 and $(5.8) during the three and six months ended, respectively	0.9	4.9	1.6	10.1
Total other comprehensive income (loss), net of tax	40.3	(52.1)	280.0	(44.3)
Comprehensive income	158.9	0.0	382.5	17.6
Comprehensive (loss) income attributable to noncontrolling interests:
Net (loss) income	(1.9)	2.5	(4.1)	10.7
Foreign currency translation adjustment	(0.1)	(0.5)	0.5	(0.5)
Total comprehensive (loss) income attributable to noncontrolling interests	(2.0)	2.0	(3.6)	10.2
Comprehensive income attributable to redeemable noncontrolling interests:
Net income	11.3	2.8	17.1	4.4
Foreign currency translation adjustment	0.0	0.0	0.0	0.0
Total comprehensive income attributable to redeemable noncontrolling interests	11.3	2.8	17.1	4.4
Comprehensive income (loss) attributable to Coty Inc.	$ 149.6	$ (4.8)	$ 369.0	$ 3.0