CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (264.4)	$ (4.0)	$ (224.5)	$ (970.1)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(364.6)	(18.6)	(385.2)	(127.5)
Net unrealized derivative (loss) gain on cash flow hedges, net of taxes of $11.0 and $3.4, and $9.4 and $8.9 during the three and nine months ended, respectively	(35.0)		(29.9)
Net unrealized derivative (loss) gain on cash flow hedges, net of taxes of $11.0 and $3.4, and $9.4 and $8.9 during the three and nine months ended, respectively		(11.0)		(28.7)
Pension and other post-employment benefits adjustment, net of tax of $0.0 and $2.0, and $0.0 and $0.6 during the three and nine months ended, respectively	(1.5)	(5.6)	(4.6)	(4.0)
Total other comprehensive loss, net of tax	(401.1)	(35.2)	(419.7)	(160.2)
Comprehensive loss	(665.5)	(39.2)	(644.2)	(1,130.3)
Comprehensive income (loss) attributable to noncontrolling interests:
Net income	6.2	2.3	9.5	4.1
Foreign currency translation adjustment	(0.1)	(0.1)	0.0	0.1
Total comprehensive income attributable to noncontrolling interests	6.1	2.2	9.5	4.2
Comprehensive income attributable to redeemable noncontrolling interests:
Net income attributable to redeemable noncontrolling interests	1.0	5.8	6.4	10.6
Comprehensive loss attributable to Coty Inc.	$ (672.6)	$ (47.2)	$ (660.1)	$ (1,145.1)