RESTRUCTURING COSTS - Restructuring Roll Forward (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	$ 223.1
Restructuring charges	45.6
Payments	(154.3)
Change in estimates	(17.1)
Non-cash impact	(26.9)
Effect of exchange rates	(3.4)
Balance—June 30, 2019	67.0	$ 223.1
2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	51.5
Restructuring charges	18.7
Payments	(50.3)
Change in estimates	(1.9)
Effect of exchange rates	(0.9)
Balance—June 30, 2019	17.1	51.5
Severance and Employee Benefits | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	203.0
Restructuring charges	10.8
Payments	(141.0)
Change in estimates	(16.8)
Non-cash impact	0.9
Effect of exchange rates	(3.2)
Balance—June 30, 2019	53.7	203.0
Severance and Employee Benefits | 2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	48.0
Restructuring charges	17.2
Payments	(47.1)
Change in estimates	(1.8)
Effect of exchange rates	(0.8)
Balance—June 30, 2019	15.5	48.0
Third-Party Contract Terminations | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	17.0
Restructuring charges	4.6
Payments	(9.6)
Change in estimates	(0.1)
Non-cash impact	0.0
Effect of exchange rates	(0.2)
Balance—June 30, 2019	11.7	17.0
Third-Party Contract Terminations | 2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	0.2
Restructuring charges	0.0
Payments	0.0
Change in estimates	(0.1)
Effect of exchange rates	0.0
Balance—June 30, 2019	0.1	0.2
Fixed Asset Write-offs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	0.0
Restructuring charges	27.8
Payments	0.0
Change in estimates	0.0
Non-cash impact	(27.8)
Effect of exchange rates	0.0
Balance—June 30, 2019	0.0	0.0
Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	9.4
Restructuring charges	(0.8)	(6.5)	$ 9.8
Balance—June 30, 2019	5.4	9.4
Other Exit Costs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	3.1
Restructuring charges	2.4
Payments	(3.7)
Change in estimates	(0.2)
Non-cash impact	0.0
Effect of exchange rates	0.0
Balance—June 30, 2019	1.6	3.1
Other Exit Costs | 2018 Restructuring Actions
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	3.3
Restructuring charges	1.5
Payments	(3.2)
Change in estimates	0.0
Effect of exchange rates	(0.1)
Balance—June 30, 2019	$ 1.5	$ 3.3