Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule Of Carrying Value And Fair Value Measurement Information For Financial Assets And Liabilities

							Fair Value Measurements Using:
	Carrying			Total Fair			Level 1		Level 2
	Amount			Value			Inputs		Inputs
December 31, 2020 assets (liabilities):
Cash equivalents	$	1,436		$	1,436		$	1,436	$	—
Commodity derivatives	$	6		$	6		$	—	$	6
Commodity derivatives	$	(148	)	$	(148	)	$	—	$	(148	)
Debt	$	(4,298	)	$	(5,365	)	$	—	$	(5,365	)
December 31, 2019 assets (liabilities):
Cash equivalents	$	702		$	702		$	702	$	—
Commodity derivatives	$	50		$	50		$	—	$	50
Commodity derivatives	$	(31	)	$	(31	)	$	—	$	(31	)
Debt	$	(4,294	)	$	(5,376	)	$	—	$	(5,376	)