CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 109.4	$ 523.2	$ 267.7
Other comprehensive income (loss):
Foreign currency translation adjustment	(128.3)	49.4	(476.1)
Net unrealized derivative (loss) gain on cash flow hedges, net of taxes of $(1.1), $1.4 and $(6.0), respectively	1.4	(3.6)	19.8
Pension and other post-employment benefits, net of taxes of $2.7, $(4.9) and $(24.7), respectively	(5.8)	10.1	59.4
Total other comprehensive (loss) income, net of tax	(132.7)	55.9	(396.9)
Comprehensive (loss) income	(23.3)	579.1	(129.2)
Comprehensive (loss) attributable to noncontrolling interests:
Net income (loss)	5.3	(1.8)	(5.1)
Foreign currency translation adjustment	0.0	0.3	(0.5)
Total comprehensive income (loss) attributable to noncontrolling interests	5.3	(1.5)	(5.6)
Comprehensive income (loss) attributable to redeemable noncontrolling interests:
Net income (loss)	14.7	16.8	13.3
Foreign currency translation adjustment	0.0	0.1	(0.4)
Total comprehensive income attributable to redeemable noncontrolling interests	14.7	16.9	12.9
Comprehensive (loss) income attributable to Coty Inc.	$ (43.3)	$ 563.7	$ (136.5)