NET INCOME ATTRIBUTABLE TO COTY INC. PER COMMON SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income attributable to Coty Inc.	$ 125.4	$ 82.5	$ 136.0	$ 176.0
Weighted-average common shares outstanding:
Weighted-average common shares outstanding—Basic (in Shares)	353.4	384.4	353.8	384.2
Effect of dilutive stock options	7.4	7.2	7.9	7.6
Effect of restricted stock and RSUs	1.8	1.7	1.8	1.7
Weighted-average common shares outstanding—Diluted (in Shares)	362.6	393.3	363.5	393.5
Net income attributable to Coty Inc. per common share:
Basic (in Dollars per share)	$ 0.35	$ 0.21	$ 0.38	$ 0.46
Diluted (in Dollars per share)	$ 0.35	$ 0.21	$ 0.37	$ 0.45
Employee Stock Option [Member]
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	0	1.2	1.2	0
Restricted Stock Units (RSUs) [Member]
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	0.1	0	0.8	0