CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net revenues	$ 4,717.8	$ 6,287.9	$ 6,841.8
Cost of sales	1,991.2	2,498.5	2,718.2
Gross profit	2,726.6	3,789.4	4,123.6
Selling, general and administrative expenses	3,120.0	3,467.9	3,807.1
Amortization of intangible assets	233.1	246.7	244.3
Restructuring costs	130.2	34.2	134.9
Acquisition- and divestiture- related costs	157.3	0.0	64.2
Asset impairment charges	434.0	3,729.0	0.0
(Gain) loss on divestitures and sale of brand assets	(111.5)	0.0	28.6
Operating loss	(1,236.5)	(3,688.4)	(155.5)
Interest expense, net	242.7	225.2	200.6
Loss on early extinguishment of debt	0.0	0.0	10.7
Other (income) expense, net	(11.6)	31.8	27.7
Loss from continuing operations before income taxes	(1,467.6)	(3,945.4)	(394.5)
Benefit for income taxes on continuing operations	(377.7)	(54.8)	(32.2)
Net loss from continuing operations	(1,089.9)	(3,890.6)	(362.3)
Net income from discontinued operations	87.2	121.0	234.5
Net loss	(1,002.7)	(3,769.6)	(127.8)
Net income attributable to noncontrolling interests	4.7	2.5	2.0
Net (loss) income attributable to redeemable noncontrolling interests	(0.7)	12.1	39.0
Net loss attributable to Coty Inc.	(1,006.7)	(3,784.2)	(168.8)
Net loss from continuing operations	(1,093.9)	(3,905.2)	(403.3)
Convertible Series B Preferred Stock dividends	(6.5)	0.0	0.0
Net loss from continuing operations attributable to common stockholders	(1,100.4)	(3,905.2)	(403.3)
Net income from discontinued operations	87.2	121.0	234.5
Net loss attributable to common stockholders	$ (1,013.2)	$ (3,784.2)	$ (168.8)
(Loss) Earnings per common share
(Loss) from continuing operations per common share - basic (in dollars per share)	$ (1.45)	$ (5.20)	$ (0.54)
(Loss) from continuing operations per common share - diluted (in dollars per share)	(1.45)	(5.20)	(0.54)
Earnings from discontinued operations - basic (in dollars per share)	0.12	0.16	0.31
Earnings from discontinued operations - diluted (in dollars per share)	0.12	0.16	0.31
(Loss) per common share - basic (in dollars per share)	(1.33)	(5.04)	(0.23)
(Loss) per common share - diluted (in dollars per share)	$ (1.33)	$ (5.04)	$ (0.23)
Weighted-average common shares outstanding:
Basic (in shares)	759.1	751.2	749.7
Diluted (in shares)	759.1	751.2	749.7