SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Interest Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Supplemental Income Statement Elements [Abstract]
Interest expense	$ 156	$ 177	$ 319	$ 361
Interest income	40	55	86	106
Capitalized interest costs	$ 9	$ 9	$ 18	$ 14