RETIREMENT PLANS (Details) € in Millions, $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2018 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2018
Pension | U.S.
Net periodic benefit costs
Service cost						$ 74.5	$ 70.2	$ 67.1
Interest cost on benefit obligation						83.1	83.4	81.5
Expected return on plan assets						(161.9)	(149.9)	(143.6)
Recognition of net actuarial (gain) loss						39.0	28.7	30.7
Amortization of prior service cost (benefit)						(6.8)	(6.8)	(6.9)
Settlements/curtailments							0.3	0.5
Total expense (benefit)						27.9	$ 25.9	$ 29.3
Other Pension Plan Information
Contributions to plan	$ 80.0
Plan amendments, decrease in benefit obligation		$ 40.4				$ 40.4
Discount rate (as a percent)		4.34%	4.27%		4.34%	4.34%	3.70%	4.27%
Pension | International
Net periodic benefit costs
Service cost						$ 33.2	$ 31.4	$ 27.8
Interest cost on benefit obligation						29.1	28.4	31.9
Expected return on plan assets						(63.2)	(56.3)	(52.5)
Recognition of net actuarial (gain) loss						17.2	18.5	12.8
Amortization of prior service cost (benefit)						(0.9)	(0.7)	(0.8)
Settlements/curtailments						2.3	0.9	1.8
Total expense (benefit)						$ 17.7	$ 22.2	$ 21.0
Other Pension Plan Information
Discount rate (as a percent)		2.49%	2.33%		2.49%	2.49%	2.17%	2.33%
Postretirement Health Care
Other Pension Plan Information
Plan amendments, decrease in benefit obligation				$ 50.0
Postretirement Health Care | U.S.
Net periodic benefit costs
Service cost						$ 2.7	$ 2.6	$ 3.0
Interest cost on benefit obligation						5.6	5.8	7.4
Expected return on plan assets						(0.4)	(0.5)	(0.7)
Recognition of net actuarial (gain) loss						(1.9)	(2.4)	(1.6)
Amortization of prior service cost (benefit)						(19.7)	(16.7)	(4.3)
Total expense (benefit)						(13.7)	(11.2)	$ 3.8
Other Pension Plan Information
Plan amendments, decrease in benefit obligation					€ 18.9	$ 13.7	$ (1.8)
Plan amendments, decrease in benefit obligation, net of tax | €					€ (14.4)
Discount rate (as a percent)		4.29%	4.14%	3.29%	4.29%	4.29%	3.66%	4.14%	4.36%
Decrease in defined benefit cost due to re-measurement of benefit plans			$ 5.0			$ 4.5