CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net revenues	$ 1,990.6	$ 2,222.7	$ 6,533.1	$ 7,098.6
Cost of sales	741.2	812.3	2,507.0	2,711.4
Gross profit	1,249.4	1,410.4	4,026.1	4,387.2
Selling, general and administrative expenses	1,070.5	1,251.6	3,476.8	3,761.9
Amortization expense	86.7	92.8	267.7	260.6
Restructuring costs	6.7	42.7	43.7	75.6
Acquisition-related costs	0.0	2.6	0.0	63.7
Asset impairment charges	0.0	0.0	977.7	0.0
Operating income (loss)	85.5	20.7	(739.8)	225.4
Interest expense, net	72.0	72.6	204.4	199.3
Other expense, net	17.5	3.8	25.0	12.5
(Loss) income before income taxes	(4.0)	(55.7)	(969.2)	13.6
Provision (benefit) for income taxes	0.0	4.4	0.9	(28.8)
Net (loss) income	(4.0)	(60.1)	(970.1)	42.4
Net income (loss) attributable to noncontrolling interests	2.3	1.1	4.1	(3.0)
Net income attributable to redeemable noncontrolling interests	5.8	15.8	10.6	32.9
Net (loss) income attributable to Coty Inc.	$ (12.1)	$ (77.0)	$ (984.8)	$ 12.5
Net (loss) income attributable to Coty Inc. per common share:
Basic (in dollars per share)	$ (0.02)	$ (0.10)	$ (1.31)	$ 0.02
Diluted (in dollars per share)	$ (0.02)	$ (0.10)	$ (1.31)	$ 0.02
Weighted-average common shares outstanding:
Basic (in shares)	751.4	750.1	751.1	749.4
Diluted (in shares)	751.4	750.1	751.1	753.1