SUPPLEMENTARY INFORMATION (Supplemental Cash Flow Information) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplementary Information [Abstract]
Interest , net of amounts capitalized	$ 842	$ 993	$ 1,143
Income taxes	$ 518	$ 881	$ 1,193