CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net revenues	$ 1,528.0	$ 1,990.6	$ 5,815.8	$ 6,533.1
Cost of sales	617.1	741.2	2,214.8	2,507.0
Gross profit	910.9	1,249.4	3,601.0	4,026.1
Selling, general and administrative expenses	999.1	1,070.5	3,274.3	3,476.8
Gain on sale of business	0.0	0.0	(84.5)	0.0
Amortization expense	87.6	86.7	248.7	267.7
Restructuring costs	(6.7)	6.7	134.2	43.7
Acquisition and divestiture-related costs	49.3	0.0	85.3	0.0
Asset impairment charges	40.4	0.0	40.4	977.7
Operating (loss) income	(258.8)	85.5	(97.4)	(739.8)
Interest expense, net	73.6	72.0	222.1	204.4
Other expense, net	0.5	17.5	4.0	25.0
Loss before income taxes	(332.9)	(4.0)	(323.5)	(969.2)
(Benefit) provision for income taxes	(68.5)	0.0	(99.0)	0.9
Net loss	(264.4)	(4.0)	(224.5)	(970.1)
Net income attributable to noncontrolling interests	6.2	2.3	9.5	4.1
Net income attributable to redeemable noncontrolling interests	1.0	5.8	6.4	10.6
Net loss attributable to Coty Inc.	$ (271.6)	$ (12.1)	$ (240.4)	$ (984.8)
Net loss attributable to Coty Inc. per common share:
Basic (in dollars per share)	$ (0.36)	$ (0.02)	$ (0.32)	$ (1.31)
Diluted (in dollars per share)	$ (0.36)	$ (0.02)	$ (0.32)	$ (1.31)
Weighted-average common shares outstanding:
Basic (in shares)	760.8	751.4	757.7	751.1
Diluted (in shares)	760.8	751.4	757.7	751.1