CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net revenues	$ 6,118.0	$ 5,554.1	$ 5,304.4
Cost of sales	2,178.8	2,006.8	1,935.2
Gross profit	3,939.2	3,547.3	3,369.2
Selling, general and administrative expenses	3,162.4	2,818.3	2,881.3
Amortization expense	193.4	191.8	207.4
Restructuring costs	36.7	(6.5)	(6.5)
Acquisition- and divestiture- related costs	0.0	0.0	14.7
Asset impairment charges	0.0	0.0	31.4
Operating income	546.7	543.7	240.9
Interest expense, net	252.0	257.9	224.0
Other expense (income), net	90.2	(419.0)	(409.9)
Income from continuing operations before income taxes	204.5	704.8	426.8
Provision for income taxes on continuing operations	95.1	181.6	164.8
Net income from continuing operations	109.4	523.2	262.0
Net income from discontinued operations	0.0	0.0	5.7
Net income	109.4	523.2	267.7
Net income (loss) attributable to noncontrolling interests	5.3	(1.8)	(5.1)
Net income attributable to redeemable noncontrolling interests	14.7	16.8	13.3
Net income attributable to Coty Inc.	89.4	508.2	259.5
Amounts attributable to Coty Inc.
Net income from continuing operations	89.4	508.2	253.8
Convertible Series B Preferred Stock dividends	(13.2)	(13.2)	(198.3)
Net income from continuing operations attributable to common stockholders	76.2	495.0	55.5
Net income from discontinued operations, net of tax	0.0	0.0	5.7
Net income from continuing operations attributable to common stockholders	76.2	495.0	61.2
Net income from continuing operations attributable to common stockholders	$ 76.2	$ 495.0	$ 61.2
Earnings (losses) per common share
Earnings from continuing operations per common share - basic (in dollars per share)	$ 0.09	$ 0.58	$ 0.07
Earnings from continuing operations per common share - diluted (in dollars per share)	0.09	0.57	0.07
Earnings from discontinued operations - basic (in dollars per share)	0.00	0.00	0.01
Earnings from discontinued operations - diluted (in dollars per share)	0.00	0.00	0.01
Earnings per common share - basic (in dollars per share)	0.09	0.58	0.08
Earnings per common share - diluted (in dollars per share)	$ 0.09	$ 0.57	$ 0.08
Weighted-average common shares outstanding:
Basic (in shares)	874.4	849.0	820.6
Diluted (in shares)	883.4	886.5	834.1