NET INCOME (LOSS) ATTRIBUTABLE TO COTY INC. PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Amounts attributable to Coty Inc.
Net income from continuing operations	$ 52.9	$ 32.9	$ 536.5	$ 132.9
Convertible Series B Preferred Stock dividends	(3.3)	(34.1)	(195.0)	(78.1)
Net income (loss) from continuing operations attributable to common stockholders	49.6	(1.2)	341.5	54.8
Net income from discontinued operations, net of tax	0.7	(17.3)	4.5	(148.2)
Net income (loss) attributable to common stockholders	$ 50.3	$ (18.5)	$ 346.0	$ (93.4)
Weighted-average common shares outstanding:
Weighted-average common shares outstanding—Basic (in shares)	838.4	765.4	814.8	764.6
Effect of dilutive stock options and Series A Preferred Stock (in shares)	0.0	0.0	0.0	0.0
Effect of restricted stock and RSUs (in shares)	14.5	0.0	12.7	5.4
Effect of Convertible Series B Preferred Stock (in shares)	0.0	0.0	0.0	162.1
Weighted-average common shares outstanding—Diluted (in shares)	852.9	765.4	827.5	932.1
Earnings per common share:
Earnings from continuing operations per common share - basic (in dollars per share)	$ 0.06	$ 0	$ 0.42	$ 0.07
Earnings from continuing operations per common share - diluted (in dollars per share)	0.06	0	0.42	0.07
Losses from discontinued operations - basic (in dollars per share)	0	(0.02)	0	(0.19)
Losses from discontinued operations - diluted (in dollars per share)	0	(0.02)	0	(0.19)
Earnings (losses) per common share - basic (in dollars per share)	0.06	(0.02)	0.42	(0.12)
Earnings (losses) per common share - diluted (in dollars per share)	$ 0.06	$ (0.02)	$ 0.42	$ (0.12)
Stock Options and Series A Preferred Stock
Earnings per common share:
Anti-dilutive shares (in shares)	6.6		8.9	15.4
RSUs
Earnings per common share:
Anti-dilutive shares (in shares)	0.7		2.3	6.2
Series B Preferred Stock
Earnings per common share:
Anti-dilutive shares (in shares)	23.7		79.2	0.0