CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net revenues	$ 7,650.3	$ 4,349.1	$ 4,395.2
Cost of sales	3,028.5	1,746.0	1,757.0
Gross profit	4,621.8	2,603.1	2,638.2
Selling, general and administrative expenses	4,060.0	2,027.8	2,066.1
Amortization expense	275.1	79.5	74.7
Restructuring costs	372.2	86.9	75.4
Acquisition-related costs	355.4	174.0	34.1
Asset impairment charges	0.0	5.5	0.0
Gain on sale of assets	(3.1)	(24.8)	(7.2)
Operating (loss) income	(437.8)	254.2	395.1
Interest expense, net	218.6	81.9	73.0
Loss on early extinguishment of debt	0.0	3.1	88.8
Other expense, net	1.6	30.4	0.0
(Loss) income before income taxes	(658.0)	138.8	233.3
Benefit for income taxes	(259.5)	(40.4)	(26.1)
Net (loss) income	(398.5)	179.2	259.4
Net income attributable to noncontrolling interests	15.4	7.6	15.1
Net income attributable to redeemable noncontrolling interests	8.3	14.7	11.8
Net (loss) income attributable to Coty Inc.	$ (422.2)	$ 156.9	$ 232.5
Net (loss) income attributable to Coty Inc. per common share:
Basic (dollars per shares)	$ (0.66)	$ 0.45	$ 0.66
Diluted (dollars per shares)	$ (0.66)	$ 0.44	$ 0.64
Weighted-average common shares outstanding:
Basic (shares)	642.8	345.5	353.3
Diluted (shares)	642.8	354.2	362.9