PENSION AND POSTRETIREMENT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension | U.S.
Net periodic benefit costs
Service cost	$ 18.6	$ 17.5	$ 55.8	$ 52.6
Interest cost on benefit obligation	20.8	20.9	62.4	62.6
Expected return on plan assets	(40.5)	(37.4)	(121.5)	(112.3)
Recognition of net actuarial (gain) loss	9.8	7.2	29.4	21.5
Amortization of prior service cost (benefit)	(1.7)	(1.7)	(5.1)	(5.1)
Total expense (benefit)	7.0	6.5	21.0	19.3
Pension | International
Net periodic benefit costs
Service cost	8.4	7.7	25.4	23.0
Interest cost on benefit obligation	7.5	7.0	22.4	21.1
Expected return on plan assets	(16.1)	(13.9)	(48.8)	(41.7)
Recognition of net actuarial (gain) loss	4.4	4.5	13.2	13.6
Amortization of prior service cost (benefit)	(0.2)	(0.2)	(0.6)	(0.5)
Total expense (benefit)	4.0	5.1	11.6	15.5
Other Pension Plan Information
Contributions to plan			33.0
Contributions anticipated to be made during the remainder of 2018	10.0		10.0
Pension | Non-qualified plan | U.S.
Other Pension Plan Information
Contributions to plan			5.0
Contributions anticipated to be made during the remainder of 2018	1.0		1.0
Postretirement Health Care | U.S.
Net periodic benefit costs
Service cost	0.5	0.7	2.3	2.0
Interest cost on benefit obligation	1.3	1.5	4.3	4.4
Expected return on plan assets	(0.1)	(0.1)	(0.3)	(0.4)
Recognition of net actuarial (gain) loss	(0.5)	(0.6)	(1.5)	(1.8)
Amortization of prior service cost (benefit)	(5.8)	(4.2)	(14.0)	(12.5)
Total expense (benefit)	(4.6)	$ (2.7)	(9.2)	$ (8.3)
Other Pension Plan Information
Contributions to plan			8.0
Contributions anticipated to be made during the remainder of 2018	3.0		$ 3.0
Plan amendments, decrease in benefit obligation	18.9
Plan amendments, decrease in benefit obligation, net of tax	$ 14.4
Discount rate (as a percent)	4.36%		4.36%
Decrease in defined benefit cost due to re-measurement of benefit plans	$ 2.3