CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Net revenues	$ 5,892.9	$ 6,118.0	$ 5,554.1
Cost of sales	2,072.0	2,178.8	2,006.8
Gross profit	3,820.9	3,939.2	3,547.3
Selling, general and administrative expenses	3,103.4	3,162.4	2,818.3
Amortization expense	186.9	193.4	191.8
Restructuring costs	76.7	36.7	(6.5)
Asset impairment charges	212.8	0.0	0.0
Operating income	241.1	546.7	543.7
Interest expense, net	214.2	252.0	257.9
Other expense (income), net	371.7	90.2	(419.0)
(Loss) income before income taxes	(344.8)	204.5	704.8
Provision for income taxes	5.4	95.1	181.6
Net (loss) income	(350.2)	109.4	523.2
Net income (loss) attributable to noncontrolling interests	5.3	5.3	(1.8)
Net income attributable to redeemable noncontrolling interests	12.4	14.7	16.8
Net (loss) income attributable to Coty Inc.	(367.9)	89.4	508.2
Amounts attributable to Coty Inc.
Net (loss) income	(367.9)	89.4	508.2
Convertible Series B Preferred Stock dividends	(13.2)	(13.2)	(13.2)
Net (loss) income attributable to common stockholders	(381.1)	76.2	495.0
Net (loss) income attributable to common stockholders	$ (381.1)	$ 76.2	$ 495.0
Earnings (losses) per common share
(Losses) earnings per common share - basic (in dollars per share)	$ (0.44)	$ 0.09	$ 0.58
(Losses) earnings per common share - diluted (in dollars per share)	$ (0.44)	$ 0.09	$ 0.57
Weighted-average common shares outstanding:
Basic (in shares)	870.9	874.4	849.0
Diluted (in shares)	870.9	883.4	886.5