EMPLOYEE BENEFIT PLANS - Reconciliation of the projected benefit obligations, plan assets, funded status (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning balance	$ 333.4	$ 303.1
Service cost	36.7	7.6	$ 7.4
Interest cost	10.0	8.9	10.3
Plan participants’ contributions	15.2	2.3
Benefits paid	(14.1)	(15.3)
Premiums paid	(2.9)	(0.8)
Pension curtailment	(2.2)	(1.8)
Pension settlements	(83.2)	(1.7)
Actuarial (gain) loss	(84.5)	28.7
Acquired obligations	572.8	5.2
Effect of exchange rates	10.2	(2.9)
Other	0.0	0.1
Benefit obligation - ending balance	791.4	333.4	303.1
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets - beginning balance	95.6	88.8
Actual return on plan assets	9.8	5.6
Employer contributions	41.7	12.8
Plan participants’ contributions	15.2	2.3
Benefits paid	(14.1)	(15.3)
Premiums paid	(2.9)	(0.8)
Plan settlements	(83.2)	(1.7)
Acquired plan assets	168.7	5.2
Effect of exchange rates	3.6	(1.3)
Other	0.2	0.0
Fair value of plan assets - ending balance	234.6	95.6	88.8
Funded status	(556.8)	(237.8)
Other Post-Employment Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning balance	47.7	48.2
Service cost	1.9	1.1	1.9
Interest cost	1.8	1.9	2.7
Plan participants’ contributions	0.2	0.3
Benefits paid	(2.0)	(3.2)
Premiums paid	0.0	0.0
Pension curtailment	0.0	(1.8)
Pension settlements	0.0	0.0
Actuarial (gain) loss	(1.4)	1.3
Acquired obligations	15.4	0.0
Effect of exchange rates	0.1	(0.2)
Other	0.1	0.1
Benefit obligation - ending balance	63.8	47.7	48.2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets - beginning balance	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	1.8	2.9
Plan participants’ contributions	0.2	0.3
Benefits paid	(2.0)	(3.2)
Premiums paid	0.0	0.0
Plan settlements	0.0	0.0
Acquired plan assets	0.4	0.0
Effect of exchange rates	0.0	0.0
Other	0.0	0.0
Fair value of plan assets - ending balance	0.4	0.0	0.0
Funded status	(63.4)	(47.7)
U.S. Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning balance	82.1	77.7
Service cost	0.0	0.0	0.0
Interest cost	1.6	3.4	3.3
Plan participants’ contributions	0.0	0.0
Benefits paid	(2.5)	(3.5)
Premiums paid	0.0	0.0
Pension curtailment	0.0	0.0
Pension settlements	(60.2)	0.0
Actuarial (gain) loss	(2.2)	4.5
Acquired obligations	0.0	0.0
Effect of exchange rates	0.0	0.0
Other	0.0	0.0
Benefit obligation - ending balance	18.8	82.1	77.7
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets - beginning balance	53.2	52.2
Actual return on plan assets	(0.8)	3.8
Employer contributions	10.1	0.7
Plan participants’ contributions	0.0	0.0
Benefits paid	(2.5)	(3.5)
Premiums paid	0.0	0.0
Plan settlements	(60.2)	0.0
Acquired plan assets	0.0	0.0
Effect of exchange rates	0.0	0.0
Other	0.2	0.0
Fair value of plan assets - ending balance	0.0	53.2	52.2
Funded status	(18.8)	(28.9)
International Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning balance	203.6	177.2
Service cost	34.8	6.5	5.5
Interest cost	6.6	3.6	4.3
Plan participants’ contributions	15.0	2.0
Benefits paid	(9.6)	(8.6)
Premiums paid	(2.9)	(0.8)
Pension curtailment	(2.2)	0.0
Pension settlements	(23.0)	(1.7)
Actuarial (gain) loss	(80.9)	22.9
Acquired obligations	557.4	5.2
Effect of exchange rates	10.1	(2.7)
Other	(0.1)	0.0
Benefit obligation - ending balance	708.8	203.6	177.2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets - beginning balance	42.4	36.6
Actual return on plan assets	10.6	1.8
Employer contributions	29.8	9.2
Plan participants’ contributions	15.0	2.0
Benefits paid	(9.6)	(8.6)
Premiums paid	(2.9)	(0.8)
Plan settlements	(23.0)	(1.7)
Acquired plan assets	168.3	5.2
Effect of exchange rates	(3.6)	1.3
Other	0.0	0.0
Fair value of plan assets - ending balance	234.2	42.4	$ 36.6
Funded status	$ (474.6)	$ (161.2)