Acquisitions and Divestitures - Schedule of Business Combination, Recognized Asset Acquired and Liability Assumed (Details) - Encino $ in Millions	Aug. 01, 2025 USD ($)
Business Combination [Line Items]
Total Consideration	$ 4,471
Fair value of assets acquired:
Cash and Cash Equivalents	20
Accounts Receivable, Net	323
Inventories	8
Assets from Price Risk Management Activities	26
Other Current Assets	23
Oil and Gas Properties (Successful Efforts Method)	6,732
Other Property, Plant and Equipment	52
Other Assets	68
Amount Attributable to Assets Acquired	7,252
Fair value of liabilities assumed:
Accounts Payable	621
Accrued Taxes Payable	22
Liabilities from Price Risk Management Activities	15
Current Portion of Operating Lease Liabilities	23
Other Current Liabilities	46
Senior Notes	1,266
Asset Retirement Obligations	67
Other Liabilities	72
Deferred Income Taxes	649
Amount Attributable to Liabilities Assumed	2,781
Net assets acquired and liabilities assumed	$ 4,471