CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss from continuing operations	$ (1,002.7)	$ (3,769.6)	$ (127.8)
Other comprehensive income (loss):
Foreign currency translation adjustment	(379.2)	(113.2)	115.7
Net unrealized derivative gain (loss) on cash flow hedges, net of taxes of $9.1, $14.0 and $(2.2), respectively	(29.7)	(45.0)	15.2
Pension and other post-employment benefits, net of tax of $(7.3), $17.3 and $1.5, respectively	11.6	(59.3)	17.5
Total other comprehensive (loss) income, net of tax	(397.3)	(217.5)	148.4
Comprehensive (loss) income	(1,400.0)	(3,987.1)	20.6
Comprehensive income attributable to noncontrolling interests:
Net income	4.7	2.5	2.0
Foreign currency translation adjustment	0.1	0.1	0.5
Total comprehensive income attributable to noncontrolling interests	4.8	2.6	2.5
Comprehensive income attributable to redeemable noncontrolling interests:
Net (loss) income	(0.7)	12.1	39.0
Comprehensive loss attributable to Coty Inc.	$ (1,404.1)	$ (4,001.8)	$ (20.9)