PROPERTIES AND ACCUMULATED DEPRECIATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Properties and equipment at cost	$ 13,531	$ 13,081
Less: Accumulated depreciation	7,982	7,510
Net properties	5,549	5,571
Property, Plant, and Equipment, Additional Disclosures [Abstract]
Depreciation expense	445	450	$ 437
Cumulative construction-period interest	100	98
Accumulated depreciation for cumulative construction-period interest	41	38
Interest capitalized	4	4	$ 4
Land [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment at cost	163	158
Buildings and Building Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment at cost	1,824	1,450
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment at cost	11,494	11,117
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment at cost	$ 50	$ 356