Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Schedule of Guarantor Obligations [Table Text Block]

The changes in these contractual obligations are as follows:

	Year Ended December 31, 2020
	(in millions)
Beginning contract obligations	$	468
Liabilities settled	(200)
Accretion of discount	13
Changes in estimate (a)	79
Ending contract obligations	$	360

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(a)Primarily represents changes in the Company's forecasted deficiency fee payments associated with the South Texas Divestiture and the difference between estimated and actual liabilities settled associated with the Raton transportation commitments.

Schedule of future minimum drilling commitments

Minimum firm commitments are as follows:

	As of December 31, 2020
	Firm Commitments
	(in millions)
2021	$	577
2022	527
2023	453
2024	478
2025	436
Thereafter	1,833
Total minimum firm commitments	$	4,304

Delivery Commitments

Delivery commitments for oil and gas are as follows:

	As of December 31, 2020
	Oil	Gas
	(Bbls per day)	(MMBtu per day)
2021	70,000	264,671
2022	30,575	275,000
2023	—	279,178
2024	—	264,754
2025	—	125,000
Thereafter	—	405,822
Total oil and gas delivery commitments	100,575	1,614,425