CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (127.8)	$ (398.5)	$ 179.2
Other comprehensive income (loss):
Foreign currency translation adjustment	115.7	121.9	83.3
Net unrealized derivative gain (loss) on cash flow hedges, net of taxes of $(2.2), $(7.7) and $0.3, respectively	15.2	41.5	(28.8)
Pension and other post-employment benefits, net of tax of $1.5, $(25.1) and $7.9, respectively	17.5	80.6	(19.7)
Total other comprehensive income (loss), net of tax	148.4	244.0	34.8
Comprehensive income (loss)	20.6	(154.5)	214.0
Comprehensive income attributable to noncontrolling interests:
Net income	2.0	15.4	7.6
Foreign currency translation adjustment	0.5	(0.1)	0.1
Total comprehensive income attributable to noncontrolling interests	2.5	15.3	7.7
Comprehensive income attributable to redeemable noncontrolling interests:
Net income	39.0	8.3	14.7
Foreign currency translation adjustment	0.0	0.0	0.4
Total comprehensive income attributable to redeemable noncontrolling interests	39.0	8.3	15.1
Comprehensive (loss) income attributable to Coty Inc.	$ (20.9)	$ (178.1)	$ 191.2