CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (3,769.6)	$ (127.8)	$ (398.5)
Other comprehensive income (loss):
Foreign currency translation adjustment	(113.2)	115.7	121.9
Net unrealized derivative gain (loss) on cash flow hedges, net of taxes of $14.0, $(2.2) and $(7.7), respectively	(45.0)	15.2	41.5
Pension and other post-employment benefits, net of tax of $17.3, $1.5 and $(25.1), respectively	(59.3)	17.5	80.6
Total other comprehensive (loss) income, net of tax	(217.5)	148.4	244.0
Comprehensive (loss) income	(3,987.1)	20.6	(154.5)
Comprehensive income attributable to noncontrolling interests:
Net income	2.5	2.0	15.4
Foreign currency translation adjustment	0.1	0.5	(0.1)
Total comprehensive income attributable to noncontrolling interests	2.6	2.5	15.3
Comprehensive income attributable to redeemable noncontrolling interests:
Net income	12.1	39.0	8.3
Comprehensive loss attributable to Coty Inc.	$ (4,001.8)	$ (20.9)	$ (178.1)