RESTRUCTURING COSTS - Restructuring Roll Forward (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Payments	$ 0.2	$ 3.9
Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	223.1
Restructuring charges	34.4
Payments	(84.0)
Changes in estimates	(5.7)
Non-cash utilization	(23.8)
Effect of exchange rates	1.5
Balance—December 31, 2018	142.5
2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	51.5
Restructuring charges	10.1
Payments	(31.7)
Changes in estimates	(1.3)
Effect of exchange rates	(0.7)
Balance—December 31, 2018	27.9
Severance and Employee Benefits | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	203.0
Restructuring charges	7.1
Payments	(75.7)
Changes in estimates	(5.5)
Effect of exchange rates	1.5
Balance—December 31, 2018	127.4
Severance and Employee Benefits | 2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	48.0
Restructuring charges	9.2
Payments	(30.4)
Changes in estimates	(1.3)
Non-cash utilization	0.0
Effect of exchange rates	(0.7)
Balance—December 31, 2018	24.8
Third-Party Contract Terminations | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	17.0
Restructuring charges	1.8
Payments	(6.1)
Changes in estimates	0.0
Effect of exchange rates	0.0
Balance—December 31, 2018	12.7
Third-Party Contract Terminations | 2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	0.2
Restructuring charges	0.0
Payments	0.0
Changes in estimates	0.0
Non-cash utilization	0.0
Effect of exchange rates	0.0
Balance—December 31, 2018	0.2
Fixed Asset Write-offs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	0.0
Restructuring charges	23.8
Payments	0.0
Changes in estimates	0.0
Non-cash utilization	(23.8)
Effect of exchange rates	0.0
Balance—December 31, 2018	0.0
Other Exit Costs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	3.1
Restructuring charges	1.7
Payments	(2.2)
Changes in estimates	(0.2)
Non-cash utilization	0.0
Effect of exchange rates	0.0
Balance—December 31, 2018	2.4
Other Exit Costs | 2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	3.3
Restructuring charges	0.9
Payments	(1.3)
Changes in estimates	0.0
Effect of exchange rates	0.0
Balance—December 31, 2018	$ 2.9