NET INCOME (LOSS) ATTRIBUTABLE TO COTY INC. PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net loss attributable to Coty Inc.		$ 156.9	$ 232.5	$ (97.4)
Weighted-average common shares outstanding:
Weighted-average common shares outstanding—Basic		345,500,000	353,300,000	381,700,000
Effect of dilutive stock options and Series A Preferred Stock	[1]	5,700,000	7,600,000	0
Effect of restricted stock and RSUs	[2]	3,000,000	2,000,000	0
Weighted-average common shares outstanding—Diluted		354,200,000	362,900,000	381,700,000
Net income (loss) attributable to Coty Inc. per common share:
Basic (dollars per shares)		$ 0.45	$ 0.66	$ (0.26)
Diluted (dollars per shares)		$ 0.44	$ 0.64	$ (0.26)
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding options excluded from diluted earnings per share calculation due to anti-dilutive effect		3,000,000	700,000	0
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding options excluded from diluted earnings per share calculation due to anti-dilutive effect		100,000	400,000	0

[1] As of June 30, 2016 and 2015, outstanding stock options and Series A Preferred Stock to purchase 3.0 million and 0.7 million shares of Common Stock, respectively, are excluded from the computation of diluted EPS as their inclusion would be anti-dilutive. Due to the net loss incurred in fiscal 2014, stock options are excluded from the computation of diluted EPS as their inclusion would be anti-dilutive.

[2] As of June 30, 2016 and 2015, there are 0.1 million and 0.4 million anti-dilutive RSUs excluded from the computation of diluted EPS as their inclusion would be anti-dilutive. Due to the net loss incurred in fiscal 2014, RSUs are excluded from the computation of diluted EPS as their inclusion would be anti-dilutive.