BUSINESS COMBINATIONS - Pro Forma Schedule (Details) - Galleria - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma Net revenues	$ 2,462.5	$ 4,407.9	$ 4,647.8
Pro forma Net income	215.5	132.5	207.6
Pro forma Net income attributable to Coty Inc.	$ 206.9	$ 117.4	$ 191.6
Pro forma Net income attributable to Coty Inc. per common share:
Basic (in dollars per share)	$ 0.27	$ 0.16	$ 0.25
Diluted (in dollars per share)	$ 0.27	$ 0.16	$ 0.25
Non-recurring adjustments	$ (215.5)	$ (132.5)	$ (207.6)
Acquisition-related costs
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma Net income	0.0	(314.1)	(133.0)
Pro forma Net income attributable to Coty Inc. per common share:
Non-recurring adjustments	0.0	314.1	133.0
Amortization of inventory step up
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma Net income	(12.2)	(36.5)	(48.7)
Pro forma Net income attributable to Coty Inc. per common share:
Non-recurring adjustments	$ 12.2	$ 36.5	$ 48.7

Business Acquisition, Pro Forma Earnings Per Share [Abstract]

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Business Acquisition, Pro Forma Net Income (Loss) Attributable to Parent

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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