SEGMENT REPORTING - Reporting Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment			3
Net revenues	$ 1,027.8	$ 1,062.5	$ 3,567.5	$ 4,157.4
Operating (loss)	(1.4)	(299.5)	(50.4)	(316.0)
Interest expense, net	50.3	63.8	171.6	185.3
Other (income) expense, net	(62.5)	0.3	(50.7)	4.0
Income (loss) from continuing operations before income taxes	10.8	(363.6)	(171.3)	(505.3)
Operating Segments | Americas
Segment Reporting Information [Line Items]
Net revenues	409.6	435.9	1,419.7	1,506.2
Operating (loss)	2.3	(40.3)	55.3	(36.3)
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Net revenues	473.0	512.9	1,712.3	2,097.6
Operating (loss)	28.7	(57.5)	129.7	69.6
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Net revenues	145.2	113.7	435.5	498.1
Operating (loss)	1.9	(31.4)	(10.9)	(17.3)
Other
Segment Reporting Information [Line Items]
Net revenues	0.0	0.0	0.0	55.5
Operating (loss)	0.0	0.0	0.0	(10.9)
Corporate
Segment Reporting Information [Line Items]
Operating (loss)	$ (34.3)	$ (170.3)	$ (224.5)	$ (321.1)