CONDENSED CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - 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)						2.0
Exercise of employee stock options and restricted stock units and related tax benefits	20.1		20.1			$ 0.1		20.0
Share-based compensation expense	11.6	$ 0.5	11.6	$ 0.5				11.6	$ 0.5
Dividends	(89.6)		(89.6)					(89.6)
Net income	224.4		214.7							214.7			9.7
Other comprehensive income (loss)	(11.3)		(11.0)								(11.0)		(0.3)
Distribution to noncontrolling interests, net	(10.7)												(10.7)
Adjustment of redeemable noncontrolling interests to redemption value	3.9		3.9					3.9
Balance, end of period (in shares) at Dec. 31, 2015					1.7	136.0	262.0					(61.1)
Balance, end of period at Dec. 31, 2015	419.4		405.8		$ 0.0	$ 1.4	$ 2.6	2,004.5		20.8	(285.0)	$ (1,338.5)	13.6
Balance, beginning of period at Jun. 30, 2015	86.3
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net income	6.3
Distribution to noncontrolling interests, net	(6.6)
Adjustment of redeemable noncontrolling interests to redemption value	(3.9)
Balance, end of period at Dec. 31, 2015	82.1
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)					1.0
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)
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)						1.6
Exercise of employee stock options and restricted stock units and related tax benefits	13.6		13.6			$ 0.0		13.6
Share-based compensation expense	8.9		8.9					8.9
Dividends	(187.3)		(187.3)					(187.3)
Net income	57.5		46.8							46.8			10.7
Other comprehensive income (loss)	(44.3)		(43.8)								(43.8)		(0.5)
Distribution to noncontrolling interests, net	0.0		0.0
Adjustment of redeemable noncontrolling interests to redemption value	2.4		2.4					2.4
Balance, end of period (in shares) at Dec. 31, 2016					2.7	812.0	0.0					(65.0)
Balance, end of period at Dec. 31, 2016	9,810.2		$ 9,793.1		$ 0.0	$ 8.1	$ 0.0	$ 11,500.5		$ 9.8	$ (283.5)	$ (1,441.8)	$ 17.1
Balance, beginning of period at Jun. 30, 2016	73.3
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net income	4.4
Distribution to noncontrolling interests, net	(3.5)
Adjustment of redeemable noncontrolling interests to redemption value	(2.4)
Adjustment to repurchase of redeemable noncontrolling interests	(0.9)
Balance, end of period at Dec. 31, 2016	$ 70.9