CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (205.1)	$ (1,002.7)	$ (3,769.6)
Other comprehensive income (loss):
Foreign currency translation adjustment	130.3	(379.2)	(113.2)
Net unrealized derivative gain (loss) on cash flow hedges, net of taxes of $(8.4), $9.1 and $14.0, respectively	27.5	(29.7)	(45.0)
Pension and other post-employment benefits, net of tax of $9.0, $(7.3) and $17.3, respectively	(23.6)	11.6	(59.3)
Total other comprehensive income (loss), net of tax	134.2	(397.3)	(217.5)
Comprehensive loss	(70.9)	(1,400.0)	(3,987.1)
Comprehensive income attributable to noncontrolling interests:
Net (loss) income	(16.1)	4.7	2.5
Foreign currency translation adjustment	(0.1)	0.1	0.1
Total comprehensive (loss) income attributable to noncontrolling interests	(16.2)	4.8	2.6
Comprehensive income attributable to redeemable noncontrolling interests:
Net income (loss)	12.3	(0.7)	12.1
Comprehensive loss attributable to Coty Inc.	$ (67.0)	$ (1,404.1)	$ (4,001.8)