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- Definition

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- Definition

States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

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Long-Term Debt (Details) - USD ($) $ in Millions							1 Months Ended	3 Months Ended		9 Months Ended
Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 04, 2026	Jun. 01, 2026	May 11, 2026	Mar. 09, 2026	Mar. 04, 2026	Jan. 30, 2026	Nov. 03, 2026	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Long-Term Debt [Line Items]
Loss on extinguishment of debt										$ (4)
Debt Instrument, Covenant Compliance										We were in compliance with all financial and non-financial covenants as of September 30, 2026, and through the filing of this report.
Capitalized interest costs								$ 15	$ 8	$ 43	$ 26
Civitas Resources Merger
Long-Term Debt [Line Items]
Senior Notes Assumed - Principal						$ 4,900
Assumed Credit Facility Debt Paid						$ 201
6.625% Senior Unsecured Notes Due 2034
Long-Term Debt [Line Items]
Debt Related Commitment Fees and Debt Issuance Costs				$ 16
Senior Unsecured Notes, Principal amount				$ 1,000				1,000		1,000		$ 0
8.375% Senior Unsecured Notes Due 2028
Long-Term Debt [Line Items]
Debt Instrument, Repurchase Amount								924		924
Senior Notes, repurchased principal amount								894		894
Debt Instrument, Redemption Price, Percentage					103.175%
Senior Unsecured Notes, Principal amount								456		456		0
5.000% Senior Unsecured Notes Due 2026
Long-Term Debt [Line Items]
Senior Notes, repurchased principal amount			$ 400
Debt Instrument, Redemption Price, Percentage			100.00%
6.75% Senior Unsecured Notes due 2026
Long-Term Debt [Line Items]
Senior Notes, repurchased principal amount		$ 419
Debt Instrument, Redemption Price, Percentage		100.00%
Senior Unsecured Notes, Principal amount								0		0		419
6.625% Senior Unsecured Notes due 2027
Long-Term Debt [Line Items]
Senior Notes, repurchased principal amount	$ 417
Debt Instrument, Redemption Price, Percentage	100.00%
Senior Unsecured Notes, Principal amount								$ 0		$ 0		$ 417
Subsequent Event
Long-Term Debt [Line Items]
Debt Instrument, Covenant Compliance							We were in compliance with all financial and non-financial covenants as of September 30, 2026, and through the filing of this report.