CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) shares in Millions, $ in Millions	Total	Common Class A	Total Coty Inc. Stockholders’ Equity	Total Coty Inc. Stockholders’ Equity Common Class A	Preferred Stock	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-in Capital	Additional Paid-in Capital Common Class A	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest
Beginning balance (shares) at Jun. 30, 2016					1.7	138.7	262.0					63.6
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A Common Stock for acquisition (shares)						409.7
Issuance of Class A Common Stock for acquisition	9,628.6		9,628.6			$ 4.1		9,624.5
Issuance of Preferred Stock (shares)					2.5
Issuance of Preferred Stock	0.0		0.0		$ 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						$ 2.6	$ (2.6)
Purchase of Class A Common Stock (shares)		1.4										1.4
Purchase of Class A Common Stock	(36.3)	$ (36.3)	(36.3)									$ (36.3)
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)						2.5
Exercise of employee stock options and restricted stock units and related tax benefits	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)
Adjustment of redeemable noncontrolling interests to redemption value	(86.8)		(86.8)					(86.8)
Ending balance (shares) at Jun. 30, 2017					4.2	812.9	0.0					65.0
Ending 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
Beginning balance at Jun. 30, 2016	73.3
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net (loss) income	8.3
Distribution to noncontrolling interests, net	(32.3)
Redeemable noncontrolling interest due to business combination (See Note 3)	415.9
Adjustment of redeemable noncontrolling interests to redemption value	86.8
Adjustment to repurchase of redeemable noncontrolling interests	(0.9)
Ending balance at Jun. 30, 2017	551.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Preferred Stock (shares)					1.0
Issuance of Preferred Stock	0.0		0.0		$ 0.0
Cancellation of Preferred Stock (shares)					(0.2)
Cancellation of Preferred Stock	0.0		0.0		$ 0.0
Purchase of Class A Common Stock (shares)		0.0
Purchase of Class A Common Stock		$ 0.0
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)						2.9
Exercise of employee stock options and restricted stock units and related tax benefits	22.6		22.6					22.6
Shares withheld for employee taxes	(3.6)		(3.6)					(3.6)
Share-based compensation expense	31.5		31.5					31.5
Dividends	(377.6)		(377.6)					(377.6)
Net income (loss)	(166.8)		(168.8)							(168.8)			2.0
Other comprehensive income (loss)	148.4		147.9								147.9		0.5
Dilution of redeemable noncontrolling interest due to additional contribution (See Note 20)	17.0		17.0					17.0
Additional redeemable noncontrolling interests due to employee grants (See Note 21)	(7.4)		(7.4)					(7.4)
Adjustment of redeemable noncontrolling interests to redemption value	(134.9)		(134.9)					(134.9)
Ending balance (shares) at Jun. 30, 2018					5.0	815.8						65.0
Ending balance at Jun. 30, 2018	8,855.2		8,849.7		$ 0.0	$ 8.1		10,750.8		(626.2)	158.8	$ (1,441.8)	5.5
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net (loss) income	39.0
Distribution to noncontrolling interests, net	(54.3)
Dilution of redeemable noncontrolling interest due to additional contribution (See Note 20)	(17.0)
Additional redeemable noncontrolling interests due to employee grants (See Note 21)	7.4
Proceeds from redeemable noncontrolling interests	0.2
Adjustment of redeemable noncontrolling interests to redemption value	134.9
Ending balance at Jun. 30, 2018	661.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Preferred Stock (shares)					7.9
Issuance of Preferred Stock	0.8		0.8		$ 0.1			0.7
Cancellation of Preferred Stock (shares)					(3.5)
Cancellation of Preferred Stock	0.0		0.0		$ 0.0	$ 0.0		0.0
Purchase of Class A Common Stock (shares)		0.0
Purchase of Class A Common Stock		$ 0.0
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)						1.0
Exercise of employee stock options and restricted stock units and related tax benefits	5.2		5.2			$ 0.0		5.2
Shares withheld for employee taxes	(1.4)		(1.4)					(1.4)
Share-based compensation expense	16.9		16.9					16.9
Dividends	(347.5)		(347.5)					(347.5)
Dividends settled in Shares of Class A Common Stock (in shares)						2.4
Dividends settled in Shares of Class A Common Stock	(30.6)	$ 30.6		$ 30.6					$ 30.6
Dividends declared - Stock ($0.125 per Common Share)	(30.6)		(30.6)					(30.6)
Net income (loss)	(3,781.7)		(3,784.2)							(3,784.2)			2.5
Other comprehensive income (loss)	(217.5)		(217.6)								(217.6)		0.1
Distribution to noncontrolling interests, net	(1.6)		0.0					0.0					(1.6)
Additional redeemable noncontrolling interests due to employee grants (See Note 21)	(0.6)		(0.6)					(0.6)
Adjustment of redeemable noncontrolling interests to redemption value	196.4		196.4					196.4
Ending balance (shares) at Jun. 30, 2019					9.4	819.2						65.0
Ending balance at Jun. 30, 2019	4,593.4		$ 4,586.9		$ 0.1	$ 8.1		$ 10,620.5		$ (4,541.2)	$ (58.8)	$ (1,441.8)	$ 6.5
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net (loss) income	12.1
Distribution to noncontrolling interests, net	(26.8)
Additional redeemable noncontrolling interests due to employee grants (See Note 21)	1.6
Adjustment of redeemable noncontrolling interests to redemption value	(196.4)
Ending balance at Jun. 30, 2019	$ 451.8