NET INCOME ATTRIBUTABLE TO COTY INC. PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Amounts attributable to Coty Inc.
Net income from continuing operations	$ 128.6	$ 226.0
Convertible Series B Preferred Stock dividends	(3.3)	(123.0)
Net income from continuing operations attributable to common stockholders	125.3	103.0
Net income attributable to common stockholders	$ 125.3	$ 103.0
Weighted-average common shares outstanding:
Weighted-average common shares outstanding—Basic (in shares)	842.0	777.6
Effect of dilutive stock options and Series A Preferred Stock (in shares)	0.0	0.0
Effect of restricted stock and RSUs (in shares)	16.5	10.1
Effect of Convertible Series B Preferred Stock (in shares)	23.7	0.0
Effect of Forward Repurchase Contracts (in shares)	0.0	0.0
Weighted-average common shares outstanding—Diluted (in shares)	882.2	787.7
Earnings per common share:
Earnings from continuing operations per common share - basic (in dollars per share)	$ 0.15	$ 0.13
Earnings from continuing operations per common share - diluted (in dollars per share)	0.15	0.13
Earnings per common share - basic (in dollars per share)	0.15	0.13
Earnings per common share - diluted (in dollars per share)	$ 0.15	$ 0.13
Antidilutive​ fair market value adjustments	$ 27.7	$ 0.0
Stock Options and Series A Preferred Stock
Earnings per common share:
Anti-dilutive shares (in shares)	6.2	11.4
RSUs
Earnings per common share:
Anti-dilutive shares (in shares)		5.0
Series B Preferred Stock
Earnings per common share:
Anti-dilutive shares (in shares)		163.1
Forward Repurchase Contract
Earnings per common share:
Anti-dilutive shares (in shares)	3.1