EMPLOYEE BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10.3	$ 7.7	$ 20.6	$ 10.0
Interest cost	3.8	3.2	7.7	4.9
Expected return on plan assets	(1.9)	(1.9)	(3.8)	(2.7)
Amortization of prior service cost (credit)	(1.3)	(1.4)	(2.6)	(2.8)
Amortization of net loss	0.2	1.6	0.3	3.2
Settlement loss recognized	0.0	12.8	0.0	15.9
Net periodic benefit cost	11.1	22.0	22.2	28.5
Other Post- Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.5	0.6	1.0	0.9
Interest cost	0.6	0.5	1.2	0.9
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of prior service cost (credit)	(1.4)	(1.5)	(2.8)	(3.0)
Amortization of net loss	(0.1)	0.0	(0.1)	0.0
Settlement loss recognized	0.0	0.0	0.0	0.0
Net periodic benefit cost	(0.4)	(0.4)	(0.7)	(1.2)
U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.1	0.6	0.3	1.3
Expected return on plan assets	0.0	(0.4)	0.0	(0.9)
Amortization of prior service cost (credit)	0.0	0.0	0.0	0.0
Amortization of net loss	(0.1)	0.5	(0.3)	1.0
Settlement loss recognized	0.0	12.8	0.0	15.9
Net periodic benefit cost	0.0	13.5	0.0	17.3
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	9.8	7.1	19.6	9.1
Interest cost	3.1	2.1	6.2	2.7
Expected return on plan assets	(1.9)	(1.5)	(3.8)	(1.8)
Amortization of prior service cost (credit)	0.1	0.1	0.2	0.2
Amortization of net loss	0.4	1.1	0.7	2.2
Settlement loss recognized	0.0	0.0	0.0	0.0
Net periodic benefit cost	$ 11.5	$ 8.9	$ 22.9	$ 12.4