CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenues	$ 4,629.9	$ 4,717.8	$ 6,287.9
Cost of sales	1,861.7	1,991.2	2,498.5
Gross profit	2,768.2	2,726.6	3,789.4
Selling, general and administrative expenses	2,363.2	3,120.0	3,467.9
Amortization expense	251.2	233.1	246.7
Restructuring costs	63.6	130.2	34.2
Acquisition- and divestiture- related costs	138.8	157.3	0.0
Asset impairment charges	0.0	434.0	3,729.0
Gain on divestitures	0.0	(111.5)	0.0
Operating loss	(48.6)	(1,236.5)	(3,688.4)
Interest expense, net	235.1	242.7	225.2
Other (income) expense, net	(43.9)	(11.6)	31.8
Loss from continuing operations before income taxes	(239.8)	(1,467.6)	(3,945.4)
Benefit for income taxes on continuing operations	(172.0)	(377.7)	(54.8)
Net loss from continuing operations	(67.8)	(1,089.9)	(3,890.6)
Net (loss) income from discontinued operations	(137.3)	87.2	121.0
Net loss	(205.1)	(1,002.7)	(3,769.6)
Net (loss) income attributable to noncontrolling interests	(16.1)	4.7	2.5
Net income (loss) attributable to redeemable noncontrolling interests	12.3	(0.7)	12.1
Net loss attributable to Coty Inc.	(201.3)	(1,006.7)	(3,784.2)
Amounts attributable to Coty Inc.
Net loss from continuing operations	(64.0)	(1,093.9)	(3,905.2)
Convertible Series B Preferred Stock dividends	(102.3)	(6.5)	0.0
Net loss from continuing operations attributable to common stockholders	(166.3)	(1,100.4)	(3,905.2)
Net (loss) income from discontinued operations	(137.3)	87.2	121.0
Net loss attributable to common stockholders	$ (303.6)	$ (1,013.2)	$ (3,784.2)
(Loss) earnings per common share
Loss from continuing operations per common share - basic (in dollars per share)	$ (0.22)	$ (1.45)	$ (5.20)
Loss from continuing operations per common share - diluted (in dollars per share)	(0.22)	(1.45)	(5.20)
(Loss) earnings from discontinued operations - basic (in dollars per share)	(0.18)	0.12	0.16
(Loss) earnings from discontinued operations - diluted (in dollars per share)	(0.18)	0.12	0.16
Loss per common share - basic (in dollars per share)	(0.40)	(1.33)	(5.04)
Loss per common share - diluted (in dollars per share)	$ (0.40)	$ (1.33)	$ (5.04)
Weighted-average common shares outstanding:
Basic (in shares)	764.8	759.1	751.2
Diluted (in shares)	764.8	759.1	751.2