Acquisitions (Schedule of the Allocation of Purchase Price of Indigo) (Details) - Indigo Natural Resources, LLC - USD ($) $ in Millions		9 Months Ended
	Sep. 01, 2021	Sep. 30, 2022
Consideration:
Total consideration	$ 1,961
Fair Value of Assets Acquired:
Cash and cash equivalents	55
Accounts receivable (2)	193
Other current assets	2
Commodity derivative assets	2
Evaluated oil and gas properties	2,724
Unevaluated oil and gas properties (1)	690
Other property, plant and equipment	4
Other long-term assets	27
Total assets acquired	3,697
Fair Value of Liabilities Assumed:
Accounts payable (2)	285
Other current liabilities	55
Derivative liabilities	501
Revolving credit facility	95
Senior unsecured notes	726
Asset retirement obligations	8
Other noncurrent liabilities (2)	66
Total liabilities assumed	1,736
Net Assets Acquired and Liabilities Assumed	$ 1,961
Purchase price adjustment		$ 6
Business combination, provisional information, initial accounting incomplete, adjustment, accounts receivable		1
Business combination, provisional information, initial accounting incomplete, adjustment, account payable		11
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Liability		$ 4