RESTRUCTURING COSTS - Restructuring Roll Forward (Details) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Reserve [Roll Forward]
Payments	$ 0.6	$ 4.7
Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	223.1
Restructuring charges	39.1
Payments	(140.6)
Changes in estimates	(7.8)
Non-cash utilization	(27.8)
Effect of exchange rates	(3.6)
Balance—March 31, 2019	82.4
2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	51.5
Restructuring charges	14.9
Payments	(46.0)
Changes in estimates	(1.6)
Effect of exchange rates	(0.7)
Balance—March 31, 2019	18.1
Severance and Employee Benefits | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	203.0
Restructuring charges	7.8
Payments	(130.3)
Changes in estimates	(7.5)
Non-cash utilization	0.0
Effect of exchange rates	(3.6)
Balance—March 31, 2019	69.4
Severance and Employee Benefits | 2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	48.0
Restructuring charges	13.6
Payments	(43.2)
Changes in estimates	(1.5)
Effect of exchange rates	(0.5)
Balance—March 31, 2019	16.4
Third-Party Contract Terminations | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	17.0
Restructuring charges	1.6
Payments	(7.1)
Changes in estimates	(0.1)
Non-cash utilization	0.0
Effect of exchange rates	0.0
Balance—March 31, 2019	11.4
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	(0.1)
Effect of exchange rates	0.0
Balance—March 31, 2019	0.1
Fixed Asset Write-offs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	0.0
Restructuring charges	27.8
Payments	0.0
Changes in estimates	0.0
Non-cash utilization	(27.8)
Effect of exchange rates	0.0
Balance—March 31, 2019	0.0
Other Exit Costs | Global Integration Activities
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	3.1
Restructuring charges	1.9
Payments	(3.2)
Changes in estimates	(0.2)
Non-cash utilization	0.0
Effect of exchange rates	0.0
Balance—March 31, 2019	1.6
Other Exit Costs | 2018 Restructuring
Restructuring Reserve [Roll Forward]
Balance—July 1, 2018	3.3
Restructuring charges	1.3
Payments	(2.8)
Changes in estimates	0.0
Effect of exchange rates	(0.2)
Balance—March 31, 2019	$ 1.6