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Disposal Group, Including Discontinued Operation, Contingent Consideration

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Guarantor Obligations, Reimbursement

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Loss Contingency, Buyer Recovery, Percentage

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Loss Contingency, Obligation, Percentage

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Third-party vertical integration services (b)

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Leased area with working interest ownership on which oil and gas wells have not been drilled or completed that would permit production of economic quantities of oil and gas. Excludes area of undrilled acreage held by production under terms of lease.

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Area of land held.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Amount before tax of an increase (decrease) to a gain (loss) previously reported in discontinued operations in a prior period.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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The loss recognized on termination of a contract.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Acquisitions and Divestitures Acquisitions and Divestitures (Narrative) (Details) $ in Millions	1 Months Ended						3 Months Ended		12 Months Ended			42 Months Ended
	Dec. 31, 2019 USD ($) a	Jul. 31, 2019 USD ($) a	May 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) a	Sep. 30, 2019 USD ($) a	Dec. 31, 2019 USD ($) a	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jul. 01, 2022	Jan. 01, 2021 USD ($)
Business Acquisition [Line Items]
Payments for undeveloped acreage									$ 28	$ 65	$ 136
Proceeds from disposition of assets, net of cash sold									149	469	352
Total consideration	$ 56						$ 56		56
Gain (loss) on disposition of assets, net									(477)	290	208
Loss (income) from vertical integration services									15	2	17
Asset divestiture-related charges									$ 25	170	$ 0
Percent of employees impacted									25.00%
Restricted stock awards \| Corporate Restructuring Program [Member]
Business Acquisition [Line Items]
Share-based Payment Arrangement, Accelerated Cost									$ 26
Vertical and horizontal wells in Glasscock County \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Proceeds from disposition of assets, net of cash sold	$ 64
Area of Land \| a	4,500						4,500		4,500
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 10
Certain vertical wells in Martin County of the Permian Basin \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Proceeds from disposition of assets, net of cash sold		$ 27
Area of Land \| a		1,400
South Texas divestiture
Business Acquisition [Line Items]
Proceeds from disposition of assets, net of cash sold			$ 2
Total consideration			210
Gain (loss) on disposition of assets, net							$ (525)
Disposal Group, Including Discontinued Operation, Contingent Consideration			136
Guarantor Obligations, Reimbursement	69						69		$ 69
Noncash or Part Noncash Divestiture, Amount of Consideration Received							208
Escrow Deposit	$ 75						75		$ 75
South Texas divestiture \| Employee Severance [Member]
Business Acquisition [Line Items]
Asset divestiture-related charges							19
South Texas divestiture \| Forecast [Member]
Business Acquisition [Line Items]
Loss Contingency, Obligation, Percentage												10000.00%
Loss Contingency, Buyer Recovery, Percentage												18.00%
Escrow Deposit													$ 50
South Texas divestiture \| Divestitures Obligations, South Texas [Member]
Business Acquisition [Line Items]
Guarantor Obligations, Reimbursement			72
South Texas divestiture \| Maximum
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Contingent Consideration			$ 450
Loss Contingency, Obligation, Percentage									10000.00%
South Texas divestiture \| Maximum \| Forecast [Member]
Business Acquisition [Line Items]
Loss Contingency, Obligation, Percentage												10000.00%
Loss Contingency, Buyer Recovery, Percentage												2000.00%
Pressure Pumping Assets
Business Acquisition [Line Items]
Investment in affiliate				$ 172						172
Sand mine
Business Acquisition [Line Items]
Employee-related charges					$ 7
Loss (income) from vertical integration services									$ 12
Impairment of Long-Lived Assets to be Disposed of									13
Permian Basin
Business Acquisition [Line Items]
Proceeds from disposition of assets, net of cash sold										77
West Panhandle
Business Acquisition [Line Items]
Proceeds from disposition of assets, net of cash sold						$ 170
Employee-related charges						7
Gain (loss) on disposition of assets, net						$ 127
Certain Vertical Wells in Martin County of the Permian Basin [Member]
Business Acquisition [Line Items]
Total consideration								$ 38
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal							$ 26	$ 31
Oil and Gas, Undeveloped Acreage, Gross \| a								1,900
Pressure pumping assets
Business Acquisition [Line Items]
Impairment of Long-Lived Assets to be Disposed of									16
Pressure pumping assets \| Pressure Pumping Assets \| Sale assets
Business Acquisition [Line Items]
Employee-related charges				19					1
Total consideration				282						$ 282
Gain (loss) on disposition of assets, net				30
Other divestiture-related charges				6
Loss on Contract Termination				$ 13
Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, before Income Tax									$ (10)