Supplemental Information To Statements Of Cash Flows (Tables)

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Elements [Abstract]

Schedule Of Supplemental Information To Statements Of Cash Flows

	Year Ended December 31,
	2020			2019			2018
Changes in assets and liabilities, net:
Accounts receivable	$	231		$	(3	)	$	(69	)
Other current assets		(97	)		(7	)		(152	)
Other long-term assets		(9	)		17			(7	)
Accounts payable		(38	)		(54	)		(3	)
Revenues and royalties payable		(71	)		8			106
Other current liabilities		(68	)		(66	)		3
Other long-term liabilities		(43	)		23			(36	)
Total	$	(95	)	$	(82	)	$	(158	)
Supplementary cash flow data - total operations:
Interest paid	$	259		$	308		$	385
Income taxes paid	$	171		$	6		$	40