CONDENSED CONSOLIDATED STATEMENTS OF EQUITY, REDEEMABLE COMMON STOCK AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) shares in Millions, $ in Millions	Total	Common Class A	Common Class B	Preferred Stock	Total Coty Inc. Stockholders’ Equity	Additional Paid-in Capital	Additional Paid-in Capital Series A Preferred Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest	Total Equity	Redeemable Noncontrolling Interests
BALANCE at Jun. 30, 2014		$ 1.2	$ 2.6		$ 843.8	$ 1,926.9		$ (426.4)	$ (85.1)	$ (575.4)	$ 10.6	$ 854.4	$ 106.2
BALANCE (in Shares) at Jun. 30, 2014		125.1	263.7							34.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of common stock and stock options to liability					(29.5)	(29.5)						(29.5)
Exercise of employee stock options		$ 0.0			7.8	7.8						7.8
Exercise of employee stock options (in Shares)		1.0
Share-based compensation expense					0.1	0.1						0.1
Dividends					(71.8)	(71.8)						(71.8)
Net income	$ 16.7				10.6			10.6			5.0	15.6	1.1
Other comprehensive income (loss)	(73.5)				(73.3)				(73.3)		0.0	(73.3)	(0.2)
Distribution to noncontrolling interests, net											0.0	0.0	(0.2)
Dividend payable to redeemable noncontrolling interest holder													(8.3)
Redeemable noncontrolling interest purchase adjustment					0.0	0.0					0.0	0.0	(16.2)
Adjustment of redeemable noncontrolling interests to redemption value					(3.1)	(3.1)						(3.1)	3.1
BALANCE at Sep. 30, 2014		$ 1.2	$ 2.6		684.6	1,830.4		(415.8)	(158.4)	$ (575.4)	15.6	700.2	85.5
BALANCE (in Shares) at Sep. 30, 2014		126.1	263.7							34.9
BALANCE at Jun. 30, 2015	$ 984.7	$ 1.3	$ 2.6	$ 0.0	969.8	2,044.4		(193.9)	(274.0)	$ (610.6)	14.9	984.7	86.3
BALANCE (in Shares) at Jun. 30, 2015		134.0	262.0	1.9						35.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of Class A Common Stock		$ (155.7)			(155.7)					$ (155.7)		(155.7)
Purchase of Class A Common Stock (in shares)										(5.5)
Reclassification of CS from liability to APIC					13.8	13.8						13.8
Exercise of employee stock options		$ 0.1			9.9	9.8						9.9
Exercise of employee stock options (in Shares)	1.1	1.1
Share-based compensation expense					9.0	9.0	$ 0.4					9.0
Dividends					(89.9)	(89.9)						(89.9)
Net income	$ 133.1				125.7			125.7			4.4	130.1	3.0
Other comprehensive income (loss)	(12.5)				(12.1)				(12.1)		(0.5)	(12.6)	0.1
Distribution to noncontrolling interests, net											0.0	0.0	(2.9)
Dividend payable to redeemable noncontrolling interest holder													1.5
Adjustment of redeemable noncontrolling interests to redemption value					3.6	3.6						3.6	(3.6)
BALANCE at Sep. 30, 2015	$ 893.3	$ 1.4	$ 2.6	$ 0.0	$ 874.5	$ 1,991.1		$ (68.2)	$ (286.1)	$ (766.3)	$ 18.8	$ 893.3	$ 84.4
BALANCE (in Shares) at Sep. 30, 2015		135.1	262.0	1.9						40.7