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Risk Management Activities (Details) MMBTU in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) MMBTU $ / bbl MBbls | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |  |
Assets from Price Risk Management Activities | $ |  | $ 18,000,000 |  |  | $ 65,000,000
Liabilities from Price Risk Management Activities | $ |  | 238,000,000 |  |  | 0
Net Cash Received from (Payments for) Settlements of Commodity Derivative Contracts | $ |  | (516,000,000) |  | $ 999,000,000 |
Derivative Collateral [Abstract] |  |  |  |  |
Collateral Already Posted On Derivative | $ |  | 308,000,000 |  |  | 0
Collateral Held on Derivative | $ |  | 0 |  |  | 0
Assets From Price Risk Management Activities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset | $ |  | 21,000,000 |  |  |
Derivative Liability, Fair Value, Gross Liability | $ |  | 3,000,000 |  |  |
Liabilities From Price Risk Management Activities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability | $ |  | 474,000,000 |  |  |
Derivative Collateral [Abstract] |  |  |  |  |
Collateral Posted On Derivative | $ |  | 236,000,000 |  |  |
Other Liabilities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability | $ |  | 153,000,000 |  |  |
Derivative Collateral [Abstract] |  |  |  |  |
Collateral Posted On Derivative | $ |  | 72,000,000 |  |  |
Derivative Contracts - Year Two |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Net Cash Received from (Payments for) Settlements of Commodity Derivative Contracts | $ |  | 600,000 |  |  |
Price Risk Derivative | Assets From Price Risk Management Activities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Assets from Price Risk Management Activities | $ |  | 18,000,000 | [1] |  | 65,000,000
Price Risk Derivative | Other Assets |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative Asset, Noncurrent | $ |  | 0 |  |  | 1,000,000
Price Risk Derivative | Liabilities From Price Risk Management Activities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Liabilities from Price Risk Management Activities | $ |  | 238,000,000 | [2] |  | 0
Price Risk Derivative | Other Liabilities |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative Liability, Noncurrent | $ |  | $ 81,000,000 | [3] |  | $ 1,000,000
Crude Oil | Derivative Contracts - January (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 151,000 |  |  |
Weighted Average Price |  | 50.06 |  |  |
Crude Oil | Derivative Contracts - February through March (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 201,000 |  |  |
Weighted Average Price |  | 51.29 |  |  |
Crude Oil | Derivative Contracts - April through June (closed) [Member] | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 150,000 |  |  |
Weighted Average Price |  | 51.68 |  |  |
Crude Oil | Derivative Contracts - July through September | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 150,000 |  |  |
Weighted Average Price |  | 52.71 |  |  |
Crude Oil | Derivative Contracts - January through March - Year Two | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 140,000 |  |  |
Weighted Average Price |  | 65.58 |  |  |
Crude Oil | Derivative Contracts - April through June - Year Two [Member] | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 140,000 |  |  |
Weighted Average Price |  | 65.62 |  |  |
Crude Oil | Derivative Contracts - July through September - Year Two [Member] | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 140,000 |  |  |
Weighted Average Price |  | 65.59 |  |  |
Crude Oil | Derivative Contracts - October through December - Year Two [Member] | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 140,000 |  |  |
Weighted Average Price |  | 65.68 |  |  |
Crude Oil | Derivative Contracts - February (closed) | Roll Differential Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls | [4] | 30,000 |  |  |
Weighted Average Price | [4] | 0.11 |  |  |
Crude Oil | Derivative Contracts - March through October (closed) | Roll Differential Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls | [4] | 125,000 |  |  |
Weighted Average Price | [4] | 0.17 |  |  |
Crude Oil | Derivative Contracts - Year Two | Roll Differential Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls | [4] | 125,000 |  |  |
Weighted Average Price | [4] | 0.15 |  |  |
Crude Oil | Derivative Contracts - November through December | Roll Differential Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls | [4] | 125,000 |  |  |
Weighted Average Price | [4] | 0.17 |  |  |
Crude Oil | Derivative Contracts - January through March - Year Three | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 60,000 |  |  |
Weighted Average Price |  | 66.21 |  |  |
Natural Gas Liquids | Derivative Contracts - January through September (closed) | Mont Belvieu Propane Price Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 15,000 |  |  |
Weighted Average Price |  | 29.44 |  |  |
Natural Gas Liquids | Derivative Contracts - October through December | Mont Belvieu Propane Price Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (Bbld) | MBbls |  | 15,000 |  |  |
Weighted Average Price |  | 29.44 |  |  |
Natural Gas | Derivative Contracts - Year Two | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 725 |  |  |
Weighted Average Price |  | 3.57 |  |  |
Natural Gas | Derivative Contracts - Year Two | Basis Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU | [5] | 10 |  |  |
Weighted Average Price | [5] | 0.00 |  |  |
Natural Gas | Derivative Contracts - January through March (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.99 |  |  |
Natural Gas | Derivative Contracts - April through September (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.99 |  |  |
Natural Gas | Derivative Contracts - April through September (closed) | Japan Korea Marker Price Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 70 |  |  |
Weighted Average Price |  | 6.65 |  |  |
Natural Gas | Derivative Contracts - October (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.99 |  |  |
Natural Gas | Derivative Contracts - November through December | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.99 |  |  |
Natural Gas | Derivative Contracts - Year Three | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 725 |  |  |
Weighted Average Price |  | 3.18 |  |  |
Natural Gas | Derivative Contracts - Year Three | Basis Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU | [5] | 10 |  |  |
Weighted Average Price | [5] | 0.00 |  |  |
Natural Gas | Derivative Contracts - Year Four | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 625 |  |  |
Weighted Average Price |  | 3.06 |  |  |
Natural Gas | Derivative Contracts - Year Four | Basis Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU | [5] | 10 |  |  |
Weighted Average Price | [5] | 0.00 |  |  |
Natural Gas | Derivative Contracts - Year Five | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 425 |  |  |
Weighted Average Price |  | 3.05 |  |  |
Natural Gas | Derivative Contracts - Year Five | Basis Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU | [5] | 10 |  |  |
Weighted Average Price | [5] | 0.00 |  |  |
Natural Gas | Offsetting Derivative Contracts - January through March (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.43 |  |  |
Natural Gas | OffSetting Derivative Contracts - November through December | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.83 |  |  |
Natural Gas | OffSetting Derivative Contracts - Year Two | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 0 |  |  |
Weighted Average Price |  | 0 |  |  |
Natural Gas | OffSetting Derivative Contracts - Year Three | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 0 |  |  |
Weighted Average Price |  | 0 |  |  |
Natural Gas | OffSetting Derivative Contracts - Year Four | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 0 |  |  |
Weighted Average Price |  | 0 |  |  |
Natural Gas | OffSetting Derivative Contracts - Year Five | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 0 |  |  |
Weighted Average Price |  | 0 |  |  |
Natural Gas | Offsetting Derivative Contracts - April through September (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 570 |  |  |
Weighted Average Price |  | 2.81 |  |  |
Natural Gas | Offsetting Derivative Contracts - April through September (closed) | Japan Korea Marker Price Swap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 0 |  |  |
Weighted Average Price |  | 0 |  |  |
Natural Gas | OffSetting Derivative Contracts - October (closed) | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU |  | 500 |  |  |
Weighted Average Price |  | 2.83 |  |  |
Natural Gas | Derivative Contracts Terminated - Year Two | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU | [6] | 20 |  |  |
Weighted Average Price | [6] | 2.75 |  |  |
Natural Gas | OffSetting Derivative Contracts Terminated - Year Two | Price Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Volume (MMBtud) | MMBTU | [6] | 0 |  |  |
Weighted Average Price | [6] | 0 |  |  |
[1] | The current portion of Assets from Price Risk Management Activities consists of gross assets of $21 million, partially offset by gross liabilities of $3 million, at September 30, 2021.
[2] | The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $474 million, partially offset by collateral posted with counterparties of $236 million, at September 30, 2021.
[3] | The noncurrent portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $153 million, partially offset by collateral posted with counterparties of $72 million, at September 30, 2021.
[4] | This settlement index is used to fix the differential in pricing between the NYMEX calendar month average and the physical crude oil delivery month.
[5] | This settlement index is used to fix the differential between pricing at the Houston Ship Channel and NYMEX Henry Hub prices.
[6] | In January 2021, EOG executed the early termination provision granting EOG the right to terminate all of its open 2022 natural gas price swap contracts which were open at that time. EOG received net cash of $0.6 million for the settlement of these contracts.

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