Business Acquisition, Pro Forma Earnings Per Share [Abstract]

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- Definition

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

+ References

No definition available.

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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- Definition

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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- Definition

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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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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- Definition

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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BUSINESS COMBINATIONS - Pro Forma Schedule (Details) - Galleria - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
	Oct. 01, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma Net revenues		$ 2,063.7	$ 2,070.4	$ 6,647.9	$ 7,049.4
Pro forma Net income (loss)		(77.5)	(28.6)	68.9	126.0
Pro forma Net income attributable to Coty Inc.		$ (89.7)	$ (47.2)	$ 37.4	$ 102.6
Pro forma Net income attributable to Coty Inc. per common share:
Basic (in dollars per share)		$ (0.12)	$ (0.06)	$ 0.05	$ 0.14
Diluted (in dollars per share)		$ (0.12)	$ (0.06)	$ 0.05	$ 0.13
Acquisition-related costs
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma Net income (loss)		$ (62.2)	$ (64.8)	$ (378.9)	$ (54.7)
Amortization of inventory step up
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma Net income (loss)		$ (34.5)	$ (4.9)	$ (71.0)	$ (104.1)
Majority Shareholders \| Pre-Merger Holders of Galleria Common Stock
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Number of shares received by former holders of Galleria common stock (in shares)	409.7