EMPLOYEE BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10.3	$ 16.0	$ 30.9	$ 26.0
Interest cost	3.9	2.7	11.6	7.6
Expected return on plan assets	(1.8)	(2.6)	(5.6)	(5.3)
Amortization of prior service cost (credit)	(1.4)	(1.4)	(4.0)	(4.2)
Amortization of net loss (gain)	0.1	1.5	0.4	4.7
Settlement loss recognized	0.0	0.0	0.0	15.9
Net periodic benefit cost (credit)	11.1	16.2	33.3	44.7
Other Post- Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.5	0.6	1.5	1.5
Interest cost	0.6	0.5	1.8	1.4
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of prior service cost (credit)	(1.4)	(1.5)	(4.2)	(4.5)
Amortization of net loss (gain)	0.0	0.0	(0.1)	0.0
Settlement loss recognized	0.0	0.0	0.0	0.0
Net periodic benefit cost (credit)	(0.3)	(0.4)	(1.0)	(1.6)
U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.2	0.2	0.5	1.5
Expected return on plan assets	0.0	0.0	0.0	(0.9)
Amortization of prior service cost (credit)	0.0	0.0	0.0	0.0
Amortization of net loss (gain)	(0.2)	0.4	(0.5)	1.4
Settlement loss recognized	0.0	0.0	0.0	15.9
Net periodic benefit cost (credit)	0.0	0.6	0.0	17.9
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	9.8	15.4	29.4	24.5
Interest cost	3.1	2.0	9.3	4.7
Expected return on plan assets	(1.8)	(2.6)	(5.6)	(4.4)
Amortization of prior service cost (credit)	0.0	0.1	0.2	0.3
Amortization of net loss (gain)	0.3	1.1	1.0	3.3
Settlement loss recognized	0.0	0.0	0.0	0.0
Net periodic benefit cost (credit)	$ 11.4	$ 16.0	$ 34.3	$ 28.4