CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (16.4)	$ (956.0)	$ 39.9	$ (966.1)
Other comprehensive (loss) income:
Foreign currency translation adjustment	102.0	(60.0)	(20.6)	(108.9)
Net unrealized derivative (loss) gain on cash flow hedges, net of taxes of $(1.8) and $5.8, and $(1.6) and $5.5 during the three and six months ended, respectively	6.3		5.1
Net unrealized derivative (loss) gain on cash flow hedges, net of taxes of $(1.8) and $5.8, and $(1.6) and $5.5 during the three and six months ended, respectively		(18.7)		(17.7)
Pension and other post-employment benefits adjustment, net of tax of $0.0 and $(1.9), and $0.0 and $(1.4) during the three and six months ended, respectively	(2.3)	1.5	(3.1)	1.6
Total other comprehensive income (loss), net of tax	106.0	(77.2)	(18.6)	(125.0)
Comprehensive income (loss)	89.6	(1,033.2)	21.3	(1,091.1)
Comprehensive income (loss) attributable to noncontrolling interests:
Net income	0.5	0.6	3.3	1.8
Foreign currency translation adjustment	0.1	0.0	0.1	0.2
Total comprehensive income attributable to noncontrolling interests	0.6	0.6	3.4	2.0
Comprehensive income attributable to redeemable noncontrolling interests:
Comprehensive income attributable to redeemable noncontrolling interests	4.2	4.0	5.4	4.8
Net income attributable to redeemable noncontrolling interests	4.2	4.0	5.4	4.8
Comprehensive income (loss) attributable to Coty Inc.	$ 84.8	$ (1,037.8)	$ 12.5	$ (1,097.9)