CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net revenues	$ 5,554.1	$ 5,304.4	$ 4,629.9
Cost of sales	2,006.8	1,935.2	1,861.7
Gross profit	3,547.3	3,369.2	2,768.2
Selling, general and administrative expenses	2,818.3	2,881.3	2,363.2
Amortization expense	191.8	207.4	251.2
Restructuring costs	(6.5)	(6.5)	63.6
Acquisition- and divestiture- related costs	0.0	14.7	138.8
Asset impairment charges	0.0	31.4	0.0
Operating income (loss)	543.7	240.9	(48.6)
Interest expense, net	257.9	224.0	235.1
Other income, net	(419.0)	(409.9)	(43.9)
Income (loss) from continuing operations before income taxes	704.8	426.8	(239.8)
Provision (benefit) for income taxes on continuing operations	181.6	164.8	(172.0)
Net income (loss) from continuing operations	523.2	262.0	(67.8)
Net income (loss) from discontinued operations	0.0	5.7	(137.3)
Net income (loss)	523.2	267.7	(205.1)
Net loss attributable to noncontrolling interests	(1.8)	(5.1)	(16.1)
Net income attributable to redeemable noncontrolling interests	16.8	13.3	12.3
Net income (loss) attributable to Coty Inc.	508.2	259.5	(201.3)
Amounts attributable to Coty Inc.
Net income (loss) from continuing operations	508.2	253.8	(64.0)
Convertible Series B Preferred Stock dividends	(13.2)	(198.3)	(102.3)
Net income (loss) from continuing operations attributable to common stockholders	495.0	55.5	(166.3)
Net income (loss) from discontinued operations, net of tax	0.0	5.7	(137.3)
Net income (loss) from continuing operations attributable to common stockholders	495.0	61.2	(303.6)
Net income (loss) from continuing operations attributable to common stockholders	$ 495.0	$ 61.2	$ (303.6)
Earnings (losses) per common share
Earnings (losses) from continuing operations per common share - basic (in dollars per share)	$ 0.58	$ 0.07	$ (0.22)
Earnings (losses) from continuing operations per common share - diluted (in dollars per share)	0.57	0.07	(0.22)
Earnings (losses) from discontinued operations - basic (in dollars per share)	0.00	0.01	(0.18)
Earnings (losses) from discontinued operations - diluted (in dollars per share)	0.00	0.01	(0.18)
Earnings (losses) per common share - basic (in dollars per share)	0.58	0.08	(0.40)
Earnings (losses) per common share - diluted (in dollars per share)	$ 0.57	$ 0.08	$ (0.40)
Weighted-average common shares outstanding:
Basic (in shares)	849.0	820.6	764.8
Diluted (in shares)	886.5	834.1	764.8