SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SUPPLEMENTAL CASH FLOW INFORMATION
Interest paid	$ 911	$ 383	$ 351
Capitalized interest	85	46	52
Continuing operations
SUPPLEMENTAL CASH FLOW INFORMATION
Foreign, state and federal income taxes paid for continuing operations	1,700	1,100	800
Tax refund	79	82	768
Production, property and other taxes paid	$ 725	$ 505	$ 375