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Derivative and Financial Instruments - Narrative (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Derivative [Line Items]
Debt securities, available-for-sale, unrealized loss					$ 17,000,000
Debt securities, available-for-sale, allowance for credit loss	$ 0				0		$ 0
Proceeds from sales and redemptions of investments in debt securities classified as available for sale	198,000,000	$ 165,000,000			399,000,000	$ 485,000,000
Derivative, net liability position, aggregate fair value	377,000,000				377,000,000		281,000,000
Collateral already posted, aggregate fair value	4,000,000				$ 4,000,000		$ 0
Minimum
Derivative [Line Items]
Investments and long-term receivables, remaining maturity					1 year
Maximum
Derivative [Line Items]
Investments and long-term receivables, remaining maturity					5 years
In event of downgrade below investment grade
Derivative [Line Items]
Additional collateral, aggregate fair value	$ 314,000,000				$ 314,000,000
Accounts Receivable | Maximum
Derivative [Line Items]
Credit derivative, term					30 days
Concho Resources Incorporated | Commodity Contract
Derivative [Line Items]
Gains (losses) from commodity derivatives				$ (305,000,000)
Increase (decrease) in commodity contract assets and liabilities			$ 69,000,000	$ 692,000,000

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The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

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