SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Interest Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Supplemental Income Statement Elements [Abstract]
Interest expense	$ 117	$ 156	$ 241	$ 319
Interest income	60	40	92	86
Capitalized interest costs	$ 3	$ 9	$ 5	$ 18