Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, fair value	$ 1,882	$ 2,927
Premiums on senior notes	88	100
Debt issuance costs	(6)	(7)
Total long-term debt, net	2,032	3,093
Line of Credit \| New Credit Facility
Debt Instrument [Line Items]
Chesapeake revolving credit facility	0	1,050
Long-term debt, fair value	$ 0	1,050
Senior Notes \| 5.50% senior notes due 2026
Debt Instrument [Line Items]
Interest rate, stated percentage	5.50%
Outstanding borrowings	$ 500	500
Long-term debt, fair value	$ 484	485
Senior Notes \| 5.875% senior notes due 2029
Debt Instrument [Line Items]
Interest rate, stated percentage	5.875%
Outstanding borrowings	$ 500	500
Long-term debt, fair value	$ 470	475
Senior Notes \| 6.75% senior notes due 2029
Debt Instrument [Line Items]
Interest rate, stated percentage	6.75%
Outstanding borrowings	$ 950	950
Long-term debt, fair value	$ 928	$ 917

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt premium.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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