Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Aug. 16, 2017	Dec. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	COTY INC.
Document Type	10-K
Current Fiscal Year End Date	--06-30
Entity Common Stock, Shares Outstanding		748,686,540
Amendment Flag	false
Entity Central Index Key	0001024305
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Entity Public Float			$ 13,541,968,117