CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) shares in Millions, $ in Millions	Total	CEO	Common Class A	Series A Preferred Stock	Total Coty Inc. Stockholders’ Equity	Total Coty Inc. Stockholders’ Equity CEO	Total Coty Inc. Stockholders’ Equity Series A Preferred Stock	Preferred Stock	Common Stock Common Class A	Common Stock Common Class A CEO	Common Stock Common Class B	Additional Paid-in Capital	Additional Paid-in Capital CEO	Additional Paid-in Capital Series A Preferred Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Treasury Stock CEO	Noncontrolling Interest
BALANCE at Jun. 30, 2014	$ 854.4				$ 843.8			$ 0.0	$ 1.2		$ 2.6	$ 1,926.9			$ (426.4)	$ (85.1)	$ (575.4)		$ 10.6
BALANCE (shares) at Jun. 30, 2014								0.0	125.1		263.7						34.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A Common Stock for acquisition	376.8				376.8							106.9					$ 269.9
Issuance of Class A Common Stock for Acquisition (shares)																	(15.5)
Issuance of Preferred Stock (shares)								1.9
Conversion of Common Stock (shares)									1.7		(1.7)
Purchase of Class A Common Stock	(263.1)	$ (42.0)	$ (263.1)		(263.1)	$ (42.0)											$ (263.1)	$ (42.0)
Purchase of Class A Common Stock (shares)			13.4														13.4	2.4
Exercise of employee stock options		$ 12.5				$ 12.5							$ 12.5
Exercise of employee stock options (shares)										1.4
Reclassification of common stock and stock options to liability	(29.5)				(29.5)							(29.5)
Reclassification of Class A Common Stock from liability to APIC	29.5				29.5							29.5
Discount of Class A Common Stock	1.9				1.9							1.9
Exercise of employee stock options and settlement of restricted stock units (shares)			1.4						5.8
Exercise of employee stock options and settlement of restricted stock units	48.5				48.5				$ 0.1			48.4
Share-based compensation expense	14.3				14.3							14.3
Dividends	(71.6)				(71.6)							(71.6)
Net income (loss)	247.6				232.5										232.5				15.1
Other comprehensive income (loss)	(189.3)				(188.9)											(188.9)			(0.4)
Proceeds from noncontrolling interests	1.8																		1.8
Distribution to noncontrolling interests, net	(12.2)																		(12.2)
Exercise of employee stock options and restricted stock units and related tax benefits	5.1				5.1							5.1
BALANCE at Jun. 30, 2015	984.7				969.8			$ 0.0	$ 1.3		$ 2.6	2,044.4			(193.9)	(274.0)	$ (610.6)		14.9
BALANCE (shares) at Jun. 30, 2015								1.9	134.0		262.0						35.2
BALANCE at Jun. 30, 2014	106.2
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Reclassification of common stock/stock options to liability	11.8
Reclassification of Class A Common Stock from liability to APIC	(0.2)
Exercise of former CEO stock options	(10.6)
Redeemable noncontrolling interest purchase	(15.8)
Adjustment of redeemable noncontrolling interests to redemption value	(5.1)
BALANCE at Jun. 30, 2015	86.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of Class A Common Stock	(794.9)		$ (767.0)		(794.9)												$ (794.9)
Purchase of Class A Common Stock (shares)			27.4														28.4
Exercise of employee stock options	44.8				44.8				$ 0.1			44.7
Exercise of employee stock options (shares)									4.7
Cancellation of Preferred Stock	(0.1)				(0.1)							(0.1)
Cancellation of Preferred Stock (shares)								(0.2)
Reclassification of Class A Common Stock from liability to APIC	13.8				13.8							13.8
Share-based compensation expense	20.6			$ 1.6	20.6		$ 1.6					20.6		$ 1.6
Dividends	(89.8)				(89.8)							(89.8)
Net income (loss)	164.5				156.9										156.9				7.6
Other comprehensive income (loss)	34.4				34.3											34.3			0.1
Distribution to noncontrolling interests, net	(15.7)																		(15.7)
Exercise of employee stock options and restricted stock units and related tax benefits	3.2				3.2							3.2
BALANCE at Jun. 30, 2016	367.1				360.2			$ 0.0	$ 1.4		$ 2.6	2,038.4			(37.0)	(239.7)	$ (1,405.5)		6.9
BALANCE (shares) at Jun. 30, 2016								1.7	138.7		262.0						63.6
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Reclassification of common stock/stock options to liability	14.7
Reclassification of Class A Common Stock from liability to APIC	0.4
Exercise of former CEO stock options	(14.8)
Redeemable noncontrolling interest purchase	(10.1)
Adjustment of redeemable noncontrolling interests to redemption value	(3.2)
BALANCE at Jun. 30, 2016	73.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A Common Stock for acquisition	9,628.6				9,628.6				$ 4.1			9,624.5
Issuance of Class A Common Stock for Acquisition (shares)									(409.7)
Issuance of Preferred Stock (shares)								2.5
Conversion of Common Stock									$ 2.6		$ (2.6)
Conversion of Common Stock (shares)									262.0		(262.0)
Purchase of Class A Common Stock	$ (36.3)		$ (36.3)		(36.3)												$ (36.3)
Purchase of Class A Common Stock (shares)			1.4														1.4
Exercise of employee stock options (shares)	2.2
Exercise of employee stock options and settlement of restricted stock units (shares)									2.5
Exercise of employee stock options and settlement of restricted stock units	$ 22.8				22.8							22.8
Share-based compensation expense	20.0				20.0							20.0
Dividends	(375.0)				(375.0)							(375.0)
Net income (loss)	(406.8)				(422.2)										(422.2)				15.4
Other comprehensive income (loss)	244.0				244.1											244.1			(0.1)
Distribution to noncontrolling interests, net	(10.0)																		(10.0)
Reclassification of noncontrolling interest to mandatory redeemable financial interest	(49.9)				(40.7)							(40.7)							(9.2)
Exercise of employee stock options and restricted stock units and related tax benefits	(86.8)				(86.8)							(86.8)
BALANCE at Jun. 30, 2017	9,317.7				$ 9,314.7			$ 0.0	$ 8.1		$ 0.0	$ 11,203.2			$ (459.2)	$ 4.4	$ (1,441.8)		$ 3.0
BALANCE (shares) at Jun. 30, 2017								4.2	812.9		0.0						65.0
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Reclassification of common stock/stock options to liability	8.3
Reclassification of Class A Common Stock from liability to APIC	0.0
Exercise of former CEO stock options	(32.3)
Redeemable noncontrolling interest due to business combination	415.9
Adjustment of redeemable noncontrolling interests to redemption value	86.8
Adjustment to repurchase of redeemable noncontrolling interests	(0.9)
BALANCE at Jun. 30, 2017	$ 551.1