INDUSTRY SEGMENTS AND GEOGRAPHIC AREAS - CORPORATE AND GEOGRAPHIC AREAS (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Information
Property, plant and equipment, net	$ 65,889	$ 82,230	$ 31,437
United States
Segment Information
Property, plant and equipment, net	59,016	72,808	23,594
Total Foreign
Segment Information
Property, plant and equipment, net	6,873	9,422	7,843
United Arab Emirates
Segment Information
Property, plant and equipment, net	3,737	3,886	4,051
Oman
Segment Information
Property, plant and equipment, net	1,901	2,115	2,048
Algeria
Segment Information
Property, plant and equipment, net	664	1,761	0
Colombia
Segment Information
Property, plant and equipment, net	0	1,010	927
Qatar
Segment Information
Property, plant and equipment, net	510	563	741
Other International
Segment Information
Property, plant and equipment, net	$ 61	$ 87	$ 76