Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of gain (loss) on sale or disposal of an equity method investment.

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The amount of liabilities reported by an equity method investment of the entity.

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The amount of noncurrent liabilities reported by an equity method investment of the entity.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Amount of cash inflow from the sale of other assets recognized in investing activities.

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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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No definition available.

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Acreage dedicated to joint venture of oil and gas property development.

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No definition available.

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Investments (Details) $ in Millions	3 Months Ended			12 Months Ended
Investments (Details) $ in Millions	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) a	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2017
Schedule of Equity Method Investments [Line Items]
Long-term investments	$ 48			$ 48	$ 167
Equity Method Investment, Realized Gain (Loss) on Disposal				$ 380	0	$ 0
Catalyst
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage							50.00%
Oil and Gas Acreage Dedication For Joint Venture \| a				50,000
Equity Method Investments	48			$ 48	58
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	244			244
Equity Method Investment, Summarized Financial Information, Liabilities	339			339		$ 349
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	$ 329			$ 329
Oryxx II Pipeline
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	25.00%			25.00%
Payments to Acquire Equity Method Investments					$ 93
Proceeds from Sale of Other Assets, Investing Activities				$ 357
Long-term investments	$ 110			110
Equity Method Investment, Realized Gain (Loss) on Disposal		$ 247		$ 247
Whitewater [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	20.00%			20.00%
Long-term investments	$ 15			$ 15
Equity Method Investment, Realized Gain (Loss) on Disposal	$ 7		$ 126
Minimum \| Oryxx II Pipeline
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage					12.50%
Payments to Acquire Equity Method Investments					$ 23
Maximum \| Oryxx II Pipeline
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage					25.00%