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Derivative and Financial Instruments - Narrative (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative [Line Items]
Proceeds from sales and redemptions of investments in debt securities classified as available for sale	$ 86,000,000	$ 173,000,000		$ 201,000,000	$ 320,000,000
Derivative, net liability position, aggregate fair value	326,000,000			326,000,000		$ 281,000,000
Collateral already posted, aggregate fair value	6,000,000			$ 6,000,000		$ 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				7 years
In event of downgrade below investment grade
Derivative [Line Items]
Additional collateral, aggregate fair value	$ 238,000,000			$ 238,000,000
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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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Term of the credit risk derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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