EMPLOYEE BENEFIT PLANS - Components of net periodic benefit cost (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7.6	$ 7.4	$ 8.0
Interest cost	8.9	10.3	12.3
Expected return on plan assets	(3.7)	(4.2)	(3.7)
Amortization of prior service (credit) cost	(5.7)	(2.8)	0.0
Amortization of net loss (gain)	3.8	5.0	2.0
Settlements loss (gain) recognized	0.1	1.1	(0.1)
Curtailment (gain) loss recognized	(1.8)	(0.6)	(0.6)
Net periodic benefit cost	9.2	16.2	17.9
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0
Interest cost	3.4	3.3	3.4
Expected return on plan assets	(2.6)	(3.0)	(2.5)
Amortization of prior service (credit) cost	0.0	0.0	0.0
Amortization of net loss (gain)	1.2	2.0	1.0
Settlements loss (gain) recognized	0.0	0.0	0.0
Curtailment (gain) loss recognized	0.0	0.0	0.0
Net periodic benefit cost	2.0	2.3	1.9
International Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	6.5	5.5	5.7
Interest cost	3.6	4.3	5.5
Expected return on plan assets	(1.1)	(1.2)	(1.2)
Amortization of prior service (credit) cost	0.2	0.3	0.2
Amortization of net loss (gain)	2.6	3.1	2.1
Settlements loss (gain) recognized	0.1	1.2	(0.1)
Curtailment (gain) loss recognized	0.0	(0.6)	(0.6)
Net periodic benefit cost	11.9	12.6	11.6
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.1	1.9	2.3
Interest cost	1.9	2.7	3.4
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service (credit) cost	(5.9)	(3.1)	(0.2)
Amortization of net loss (gain)	0.0	(0.1)	(1.1)
Settlements loss (gain) recognized	0.0	(0.1)	0.0
Curtailment (gain) loss recognized	(1.8)	0.0	0.0
Net periodic benefit cost	$ (4.7)	$ 1.3	$ 4.4