RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - NARRATIVE (Details) $ in Millions			12 Months Ended
	Aug. 08, 2019 USD ($)	Aug. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) employee	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure
Decrease to benefit obligation		$ 178
Accrued liabilities for the supplemental retirement plan			$ 279	$ 201
Expenses under provisions of defined contribution and supplemental retirement plans			211	152	$ 130
Total benefit costs, including postretirement costs			$ 220	182	$ 181
United States
Defined Benefit Plan Disclosure
Number of employees accruing benefits under defined benefit plans | employee			4,000
Foreign
Defined Benefit Plan Disclosure
Number of employees accruing benefits under defined benefit plans | employee			600
Pension Benefits
Defined Benefit Plan Disclosure
Additions due to the Acquisition	$ 193		$ 2,136	0
Decrease to benefit obligation			$ 0	$ 0