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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of changes in contract obligations
Year Ended December 31,
20212020
(in millions)
Beginning contractual obligations$360 $468 
Additions (a)1 — 
Liabilities settled(166)(200)
Accretion of discount8 13 
Changes in estimate (b)(4)79 
Ending contractual obligations$199 $360 
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(a)Represents environmental obligations associated with the Delaware Divestiture for which the Company is responsible for reimbursing Continental in 2022.
(b)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, 2021
Firm Commitments
(in millions)
2022$615 
2023558 
2024581 
2025513 
2026506 
Thereafter1,501 
$4,274 
Delivery commitments
Delivery commitments for oil and gas are as follows:
As of December 31, 2021
OilGas
 (Bbls per day)(MMBtu per day)
2022176,877 387,671 
2023138,630 408,356 
2024122,459 392,213 
202574,795 245,000 
202650,000 198,973 
Thereafter39,521 535,754