CONDENSED CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Series A Preferred Stock	Total Coty Inc. Stockholders’ Equity	Total Coty Inc. Stockholders’ Equity Series A Preferred Stock	Preferred Stock	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-in Capital	Additional Paid-in Capital Series A Preferred Stock	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests
Balance, beginning of period (in shares) at Jun. 30, 2015					1.9	134.0	262.0					35.2
Balance, beginning of period 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation of Preferred Stock (in shares)					(0.2)
Cancellation of Preferred Stock	(0.1)		(0.1)					(0.1)
Purchase of Class A Common Stock (in shares)												25.9
Purchase of Class A Common Stock	(727.9)		(727.9)									$ (727.9)
Reclassification of Class A Common Stock from liability to APIC	13.8		13.8					13.8
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)						3.9
Exercise of employee stock options and restricted stock units and related tax benefits	36.8		36.8			$ 0.1		36.7
Share-based compensation expense	17.3	$ 1.1	17.3	$ 1.1				17.3	$ 1.1
Dividends	(89.7)		(89.7)					(89.7)
Net (loss) income	200.0		187.9							187.9			12.1
Other comprehensive loss	24.0		23.1								23.1		0.9
Distribution to noncontrolling interests, net	(16.3)												(16.3)
Adjustment of redeemable noncontrolling interests to redemption value	11.3		11.3					11.3
Balance, end of period (in shares) at Mar. 31, 2016					1.7	137.9	262.0					61.1
Balance, end of period at Mar. 31, 2016	455.0		443.4		$ 0.0	$ 1.4	$ 2.6	2,034.8		(6.0)	(250.9)	$ (1,338.5)	11.6
Balance, beginning of period at Jun. 30, 2015	86.3
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net (loss) income	10.4
Other comprehensive loss	0.2
Distribution to noncontrolling interests, net	(6.6)
Adjustment of redeemable noncontrolling interests to redemption value	(11.3)
Balance, end of period at Mar. 31, 2016	79.0
Balance, beginning of period (in shares) at Jun. 30, 2016					1.7	138.7	262.0					63.6
Balance, beginning of period 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A Common Stock for business combination (in shares)						409.7
Issuance of Class A Common Stock for business combination	9,628.6		9,628.6			$ 4.1		9,624.5
Issuance of Preferred Stock (in shares)					2.5
Issuance of Preferred Stock					$ 0.0
Conversion of Class B to Class A Common Stock (in shares)						262.0	(262.0)
Conversion of Class B to Class A Common Stock	0.0		0.0			$ 2.6	$ (2.6)	0.0
Purchase of Class A Common Stock (in shares)												1.4
Purchase of Class A Common Stock	(36.3)		(36.3)									$ (36.3)
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)						2.2
Exercise of employee stock options and restricted stock units and related tax benefits	19.5		19.5			$ 0.0		19.5
Share-based compensation expense	15.2		15.2					15.2
Dividends	(281.2)		(281.2)					(281.2)
Net (loss) income	(103.2)		(117.4)							(117.4)			14.2
Other comprehensive loss	45.8		46.0								46.0		(0.2)
Adjustment of redeemable noncontrolling interests to redemption value	(24.9)		(24.9)					(24.9)
Balance, end of period (in shares) at Mar. 31, 2017					4.2	812.6	0.0					65.0
Balance, end of period at Mar. 31, 2017	9,630.6		$ 9,609.7		$ 0.0	$ 8.1	$ 0.0	$ 11,391.5		$ (154.4)	$ (193.7)	$ (1,441.8)	$ 20.9
Balance, beginning of period at Jun. 30, 2016	73.3
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net (loss) income	5.7
Other comprehensive loss	0.0
Distribution to noncontrolling interests, net	(7.5)
Redeemable noncontrolling interest due to business combination (Note 3)	410.9
Adjustment of redeemable noncontrolling interests to redemption value	24.9
Adjustment to repurchase of redeemable noncontrolling interests	(0.9)
Balance, end of period at Mar. 31, 2017	$ 506.4