CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net revenues	$ 2,031.3	$ 2,238.3
Cost of sales	809.1	874.2
Gross profit	1,222.2	1,364.1
Selling, general and administrative expenses	1,122.3	1,191.1
Amortization expense	92.5	78.2
Restructuring costs	15.5	11.2
Acquisition-related costs	0.0	54.1
Asset impairment charges	12.6	0.0
Operating (loss) income	(20.7)	29.5
Interest expense, net	64.1	66.4
Other expense, net	2.7	4.5
Loss before income taxes	(87.5)	(41.4)
Benefit for income taxes	(77.4)	(25.3)
Net loss	(10.1)	(16.1)
Net income (loss) attributable to noncontrolling interests	1.2	(2.2)
Net income attributable to redeemable noncontrolling interests	0.8	5.8
Net loss attributable to Coty Inc.	$ (12.1)	$ (19.7)
Net loss attributable to Coty Inc. per common share:
Basic (in dollars per share)	$ (0.02)	$ (0.03)
Diluted (in dollars per share)	$ (0.02)	$ (0.03)
Weighted-average common shares outstanding:
Basic (in shares)	750.8	748.6
Diluted (in shares)	750.8	748.6