PROPERTY (Schedule of Property) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total property	$ 56,325	$ 54,910
Depreciation expense	2,092	2,156	$ 2,174
Capitalized interest	64	80	$ 88
Land and land improvements
Property, Plant and Equipment [Line Items]
Total property	$ 2,011	2,177
Land and land improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	0 years
Land and land improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	25 years
Buildings
Property, Plant and Equipment [Line Items]
Total property	$ 4,976	4,742
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	5 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	50 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property	$ 42,108	40,651
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	25 years
Other property
Property, Plant and Equipment [Line Items]
Total property	$ 5,626	5,354
Other property | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Other property | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	50 years
Construction in progress 1
Property, Plant and Equipment [Line Items]
Total property	$ 1,604	$ 1,986