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SEGMENT REPORTING - Reporting Segments (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2016 segment	Jun. 30, 2017 segment	Jun. 30, 2017 unit	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| segment	4	3
Number of reportable segments	4	3	3
Net revenues				$ 7,650.3	$ 4,349.1	$ 4,395.2
Depreciation and amortization				555.1	232.0	230.9
Operating (loss) income				(437.8)	254.2	395.1
Interest expense, net				218.6	81.9	73.0
Loss on early extinguishment of debt				0.0	3.1	88.8
Other expense, net				1.6	30.4	0.0
(Loss) income before income taxes				(658.0)	138.8	233.3
Luxury
Segment Reporting Information [Line Items]
Net revenues				2,566.6	1,836.6	1,938.3
Consumer Beauty
Segment Reporting Information [Line Items]
Net revenues				3,688.2	2,262.5	2,185.4
Professional Beauty
Segment Reporting Information [Line Items]
Net revenues				1,395.5	250.0	271.5
Operating Segments \| Luxury
Segment Reporting Information [Line Items]
Depreciation and amortization				203.5	99.1	113.0
Operating (loss) income				158.0	228.9	313.1
Operating Segments \| Consumer Beauty
Segment Reporting Information [Line Items]
Depreciation and amortization				256.2	114.6	99.7
Operating (loss) income				261.2	246.5	156.4
Operating Segments \| Professional Beauty
Segment Reporting Information [Line Items]
Depreciation and amortization				95.4	18.0	16.9
Operating (loss) income				78.5	68.0	74.8
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization				0.0	0.3	1.3
Operating (loss) income				$ (935.5)	$ (289.2)	$ (149.2)