CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net revenues	$ 1,027.8	$ 1,062.5	$ 3,567.5	$ 4,157.4
Cost of sales	391.7	460.8	1,440.6	1,655.0
Gross profit	636.1	601.7	2,126.9	2,502.4
Selling, general and administrative expenses	545.6	757.9	1,770.5	2,481.0
Amortization expense	62.2	61.6	189.4	170.7
Restructuring costs	0.0	(8.0)	89.7	125.5
Acquisition and divestiture-related costs	29.7	49.3	127.7	85.3
Asset impairment charges	0.0	40.4	0.0	40.4
Gain on divestitures and sale of brand assets	0.0	0.0	0.0	(84.5)
Operating (loss)	(1.4)	(299.5)	(50.4)	(316.0)
Interest expense, net	50.3	63.8	171.6	185.3
Other (income) expense, net	(62.5)	0.3	(50.7)	4.0
Income (loss) from continuing operations before income taxes	10.8	(363.6)	(171.3)	(505.3)
Benefit for income taxes on continuing operations	(19.2)	(59.8)	(304.9)	(117.0)
Net income (loss) from continuing operations	30.0	(303.8)	133.6	(388.3)
Net (loss) income from discontinued operations	(17.3)	39.4	(148.2)	163.8
Net income (loss)	12.7	(264.4)	(14.6)	(224.5)
Net (loss) income attributable to noncontrolling interests	(9.4)	6.2	(11.5)	9.5
Net income attributable to redeemable noncontrolling interests	6.5	1.0	12.2	6.4
Net income (loss) attributable to Coty Inc.	15.6	(271.6)	(15.3)	(240.4)
Amounts attributable to Coty Inc.
Net income (loss) from continuing operations	32.9	(311.0)	132.9	(404.2)
Convertible Series B Preferred Stock dividends	(34.1)	0.0	(78.1)	0.0
Net (loss) income from continuing operations attributable to common stockholders	(1.2)	(311.0)	54.8	(404.2)
Net (loss) income from discontinued operations	(17.3)	39.4	(148.2)	163.8
Net loss attributable to common stockholders	$ (18.5)	$ (271.6)	$ (93.4)	$ (240.4)
Earnings (loss) per common share:
Earnings (loss) from continuing operations per common share - basic (in dollars per share)	$ 0	$ (0.41)	$ 0.07	$ (0.53)
Earnings (loss) from continuing operations per common share - diluted (in dollars per share)	0	(0.41)	0.07	(0.53)
(Loss) earnings from discontinued operations - basic (in dollars per share)	(0.02)	0.05	(0.19)	0.21
(Loss) earnings from discontinued operations - diluted (in dollars per share)	(0.02)	0.05	(0.19)	0.21
Loss per common share - basic (in dollars per share)	(0.02)	(0.36)	(0.12)	(0.32)
Loss per common share - diluted (in dollars per share)	$ (0.02)	$ (0.36)	$ (0.12)	$ (0.32)
Weighted-average common shares outstanding:
Basic (in shares)	765.4	760.8	764.6	757.7
Diluted (in shares)	765.4	760.8	932.1	757.7