GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Changes in Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2021	Jun. 30, 2020
Goodwill [Roll Forward]
Gross beginning balance	$ 8,014.0
Accumulated impairments	(4,040.1)	$ (4,040.1)
Net beginning balance	3,973.9
Measurement period adjustments	0.0
Foreign currency translation	52.7
Gross ending balance	8,066.7
Accumulated impairments	(4,040.1)	(4,040.1)
Net ending balance	4,026.6
Americas
Goodwill [Roll Forward]
Gross beginning balance	3,112.2
Accumulated impairments	(1,768.7)	(1,768.7)
Net beginning balance	1,343.5
Measurement period adjustments	(62.0)
Foreign currency translation	13.3
Gross ending balance	3,063.5
Accumulated impairments	(1,768.7)	(1,768.7)
Net ending balance	1,294.8
EMEA
Goodwill [Roll Forward]
Gross beginning balance	3,638.9
Accumulated impairments	(1,857.3)	(1,857.3)
Net beginning balance	1,781.6
Measurement period adjustments	35.9
Foreign currency translation	25.6
Gross ending balance	3,700.4
Accumulated impairments	(1,857.3)	(1,857.3)
Net ending balance	1,843.1
Asia Pacific
Goodwill [Roll Forward]
Gross beginning balance	1,262.9
Accumulated impairments	(414.1)	(414.1)
Net beginning balance	848.8
Measurement period adjustments	26.1
Foreign currency translation	13.8
Gross ending balance	1,302.8
Accumulated impairments	(414.1)	$ (414.1)
Net ending balance	$ 888.7