CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Total Coty Inc. Stockholders’ Equity	Preferred Stock	Common Stock Class A Common Stock	Stock to be issued	Additional Paid-in Capital	Receivable from sale of stock	(Accumulated Deficit)	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Noncontrolling Interests
Beginning balance (in shares) at Jun. 30, 2023			1.0
Balance, beginning of period at Jun. 30, 2023	$ 3,997.4	$ 3,811.1	$ 0.0	$ 9.1	$ 0.0	$ 10,898.6	$ 0.0	$ (4,987.9)	$ (662.4)	$ (1,446.3)	$ 186.3
Beginning balance (in shares) at Jun. 30, 2023				919.3
Beginning balance (in shares) at Jun. 30, 2023										66.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A Common Stock in connection with global offering, net of offering costs (in shares)				30.0
Issuance of Class A Common Stock in connection with global offering, net of offering costs	(5.5)	(5.5)		$ 0.3	31.5	311.2	(348.5)
Exercise of employee stock options and restricted stock units (in shares)				5.2
Exercise of employee stock options and restricted stock units				$ 0.1		(0.1)
Shares withheld for employee taxes	(0.8)	(0.8)				(0.8)
Share-based compensation expense	30.2	30.2				30.2
Equity Investment contribution for share-based compensation	0.7	0.7				0.7
Dividends Accrued - Convertible Series B Preferred Stock	(3.3)	(3.3)				(3.3)
Net income	2.7	1.6						1.6			1.1
Other comprehensive income (loss)	(115.0)	(115.0)							(115.0)
Adjustment of redeemable noncontrolling interests to redemption value	2.3	2.3				2.3
Ending balance (in shares) at Sep. 30, 2023			1.0
Ending balance at Sep. 30, 2023	3,908.7	3,721.3	$ 0.0	$ 9.5	31.5	11,238.8	(348.5)	(4,986.3)	(777.4)	$ (1,446.3)	187.4
Ending balance (in shares) at Sep. 30, 2023				954.5
Ending balance (in shares) at Sep. 30, 2023										66.5
Balance, beginning of period at Jun. 30, 2023	93.5
Balance, beginning of period at Jun. 30, 2023	142.4
Redeemable Noncontrolling Interests
Dividends Accrued - Convertible Series B Preferred Stock	3.3
Dividends Paid - Convertible Series B Preferred Stock	(3.3)
Net income	7.5
Other comprehensive loss (income)	(0.1)
Adjustment of redeemable noncontrolling interests to redemption value	(2.3)
Balance, end of period at Sep. 30, 2023	98.6
Balance, end of period at Sep. 30, 2023	142.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A Common Stock in connection with global offering, net of offering costs (in shares)				3.0
Issuance of Class A Common Stock in connection with global offering, net of offering costs	347.9	347.9			(31.5)	30.9	348.5
Reacquired Class A Common Stock for employee taxes (in shares)										0.1
Exercise of employee stock options and restricted stock units (in shares)				4.2
Exercise of employee stock options and restricted stock units	11.3	11.3		$ 0.1		11.2
Shares withheld for employee taxes	(17.3)	(17.3)				(17.3)
Share-based compensation expense	19.9	19.9				19.9
Equity Investment contribution for share-based compensation	0.6	0.6				0.6
Dividends Accrued - Convertible Series B Preferred Stock	(3.3)	(3.3)				(3.3)
Net income	181.4	180.9						180.9			0.5
Other comprehensive income (loss)	170.8	170.8							170.8
Adjustment of redeemable noncontrolling interests to redemption value	(7.3)	(7.3)				(7.3)
Ending balance (in shares) at Dec. 31, 2023			1.0
Ending balance at Dec. 31, 2023	4,612.7	4,424.8	$ 0.0	$ 9.6	0.0	11,273.5	0.0	(4,805.4)	(606.6)	$ (1,446.3)	187.9
Ending balance (in shares) at Dec. 31, 2023				961.7
Ending balance (in shares) at Dec. 31, 2023										66.6
Redeemable Noncontrolling Interests
Dividends Accrued - Convertible Series B Preferred Stock	3.3
Dividends Paid - Convertible Series B Preferred Stock	(3.3)
Net income	4.6
Other comprehensive loss (income)	0.2
Distribution to noncontrolling interests, net	(8.5)
Adjustment of redeemable noncontrolling interests to redemption value	7.3
Balance, end of period at Dec. 31, 2023	102.2
Balance, end of period at Dec. 31, 2023	142.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Class A Common Stock pursuant to forward repurchase contracts (in shares)										27.0
Repurchase of Class A Common Stock pursuant to forward repurchase contracts	(350.6)	(350.6)								$ (350.6)
Reacquired Class A Common Stock for employee taxes (in shares)										0.6
Exercise of employee stock options and restricted stock units (in shares)				0.4
Exercise of employee stock options and restricted stock units	2.3	2.3				2.3
Shares withheld for employee taxes	(1.0)	(1.0)				(1.0)
Share-based compensation expense	20.2	20.2				20.2
Equity Investment contribution for share-based compensation	0.5	0.5				0.5
Dividends Accrued - Convertible Series B Preferred Stock	(3.3)	(3.3)				(3.3)
Net income	6.2	3.8						3.8			2.4
Other comprehensive income (loss)	(106.1)	(106.0)							(106.0)		(0.1)
Distribution to noncontrolling interests, net	(1.0)										(1.0)
Adjustment of redeemable noncontrolling interests to redemption value	1.9	1.9				1.9
Ending balance (in shares) at Mar. 31, 2024			1.0
Ending balance at Mar. 31, 2024	4,181.8	3,992.6	$ 0.0	$ 9.6	$ 0.0	11,294.1	$ 0.0	(4,801.6)	(712.6)	$ (1,796.9)	189.2
Ending balance (in shares) at Mar. 31, 2024				962.1
Ending balance (in shares) at Mar. 31, 2024										94.2
Redeemable Noncontrolling Interests
Dividends Accrued - Convertible Series B Preferred Stock	3.3
Dividends Paid - Convertible Series B Preferred Stock	(3.3)
Net income	2.6
Other comprehensive loss (income)	(0.1)
Distribution to noncontrolling interests, net	(8.6)
Adjustment of redeemable noncontrolling interests to redemption value	(1.9)
Balance, end of period at Mar. 31, 2024	94.2
Balance, end of period at Mar. 31, 2024	$ 142.4
Beginning balance (in shares) at Jun. 30, 2024	1.0		1.0
Balance, beginning of period at Jun. 30, 2024	$ 4,011.7	3,827.1	$ 0.0	$ 9.6		11,308.0		(4,898.5)	(795.1)	$ (1,796.9)	184.6
Beginning balance (in shares) at Jun. 30, 2024	962.1			962.1
Beginning balance (in shares) at Jun. 30, 2024	94.3									94.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	$ 16.9	16.9				16.9
Equity Investment contribution for share-based compensation	0.4	0.4				0.4
Dividends Accrued - Convertible Series B Preferred Stock	(3.3)	(3.3)				(3.3)
Net income	85.0	82.9						82.9			2.1
Other comprehensive income (loss)	120.6	120.6							120.6
Adjustment of redeemable noncontrolling interests to redemption value	0.6	0.6				0.6
Ending balance (in shares) at Sep. 30, 2024			1.0
Ending balance at Sep. 30, 2024	4,231.9	4,045.2	$ 0.0	$ 9.6		11,322.6		(4,815.6)	(674.5)	$ (1,796.9)	186.7
Ending balance (in shares) at Sep. 30, 2024				962.1
Ending balance (in shares) at Sep. 30, 2024										94.3
Balance, beginning of period at Jun. 30, 2024	93.6
Balance, beginning of period at Jun. 30, 2024	142.4
Redeemable Noncontrolling Interests
Dividends Accrued - Convertible Series B Preferred Stock	3.3
Dividends Paid - Convertible Series B Preferred Stock	(3.3)
Net income	5.7
Other comprehensive loss (income)	0.1
Adjustment of redeemable noncontrolling interests to redemption value	(0.6)
Balance, end of period at Sep. 30, 2024	98.8
Balance, end of period at Sep. 30, 2024	142.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee stock options and restricted stock units (in shares)				4.2
Shares withheld for employee taxes	(12.7)	(12.7)				(12.7)
Share-based compensation expense	15.2	15.2				15.2
Equity Investment contribution for share-based compensation	0.3	0.3				0.3
Dividends Accrued - Convertible Series B Preferred Stock	(3.3)	(3.3)				(3.3)
Net income	25.3	23.7						23.7			1.6
Other comprehensive income (loss)	(284.7)	(284.5)							(284.5)		(0.2)
Distribution to noncontrolling interests, net	(3.9)										(3.9)
Adjustment of redeemable noncontrolling interests to redemption value	0.8	0.8				0.8
Ending balance (in shares) at Dec. 31, 2024			1.0
Ending balance at Dec. 31, 2024	3,968.9	3,784.7	$ 0.0	$ 9.6		11,322.9		(4,791.9)	(959.0)	$ (1,796.9)	184.2
Ending balance (in shares) at Dec. 31, 2024				966.3
Ending balance (in shares) at Dec. 31, 2024										94.3
Redeemable Noncontrolling Interests
Dividends Accrued - Convertible Series B Preferred Stock	3.3
Dividends Paid - Convertible Series B Preferred Stock	(3.3)
Net income	5.3
Other comprehensive loss (income)	(0.2)
Adjustment of redeemable noncontrolling interests to redemption value	(0.8)
Balance, end of period at Dec. 31, 2024	103.1
Balance, end of period at Dec. 31, 2024	142.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee stock options and restricted stock units (in shares)				0.2
Shares withheld for employee taxes	(0.3)	(0.3)				(0.3)
Share-based compensation expense	12.6	12.6				12.6
Equity Investment contribution for share-based compensation	(0.1)	(0.1)				(0.1)
Dividends Accrued - Convertible Series B Preferred Stock	(3.3)	(3.3)				(3.3)
Net income	(403.7)	(405.7)						(405.7)			2.0
Other comprehensive income (loss)	118.2	118.2							118.2
Distribution to noncontrolling interests, net	(6.0)										(6.0)
Adjustment of redeemable noncontrolling interests to redemption value	$ (11.1)	(11.1)				(11.1)
Ending balance (in shares) at Mar. 31, 2025	1.0		1.0
Ending balance at Mar. 31, 2025	$ 3,675.2	$ 3,495.0	$ 0.0	$ 9.6		$ 11,320.7		$ (5,197.6)	$ (840.8)	$ (1,796.9)	$ 180.2
Ending balance (in shares) at Mar. 31, 2025	966.5			966.5
Ending balance (in shares) at Mar. 31, 2025	94.3									94.3
Redeemable Noncontrolling Interests
Dividends Accrued - Convertible Series B Preferred Stock	$ 3.3
Dividends Paid - Convertible Series B Preferred Stock	(3.3)
Net income	1.5
Other comprehensive loss (income)	0.2
Distribution to noncontrolling interests, net	(14.0)
Adjustment of redeemable noncontrolling interests to redemption value	11.1
Balance, end of period at Mar. 31, 2025	101.9
Balance, end of period at Mar. 31, 2025	$ 142.4