CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net revenues	$ 9,398.0	$ 7,650.3	$ 4,349.1
Cost of sales	3,608.4	3,028.5	1,746.0
Gross profit	5,789.6	4,621.8	2,603.1
Selling, general and administrative expenses	5,009.6	4,060.0	2,027.8
Amortization expense	352.8	275.1	79.5
Restructuring costs	173.2	372.2	86.9
Acquisition-related costs	64.2	355.4	174.0
Asset impairment charges	0.0	0.0	5.5
Loss (gain) on sale of assets	28.6	(3.1)	(24.8)
Operating income (loss)	161.2	(437.8)	254.2
Interest expense, net	265.0	218.6	81.9
Loss on early extinguishment of debt	10.7	0.0	3.1
Other expense, net	38.0	1.6	30.4
(Loss) income before income taxes	(152.5)	(658.0)	138.8
Benefit for income taxes	(24.7)	(259.5)	(40.4)
Net (loss) income	(127.8)	(398.5)	179.2
Net income attributable to noncontrolling interests	2.0	15.4	7.6
Net income attributable to redeemable noncontrolling interests	39.0	8.3	14.7
Net (loss) income attributable to Coty Inc.	$ (168.8)	$ (422.2)	$ 156.9
Net (loss) income attributable to Coty Inc. per common share:
Basic (dollars per shares)	$ (0.23)	$ (0.66)	$ 0.45
Diluted (dollars per shares)	$ (0.23)	$ (0.66)	$ 0.44
Weighted-average common shares outstanding:
Basic (shares)	749.7	642.8	345.5
Diluted (shares)	749.7	642.8	354.2