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Risk Management Activities (Notes) | 12 Months Ended
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Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Risk Management Activities | Risk Management Activities Commodity Price Risks. EOG engages in price risk management activities from time to time. These activities are intended to manage EOG's exposure to fluctuations in commodity prices for crude oil, NGLs and natural gas. EOG utilizes financial commodity derivative instruments, primarily price swap, option, swaption, collar and basis swap contracts, as a means to manage this price risk. During 2019, 2018 and 2017, EOG elected not to designate any of its financial commodity derivative contracts as accounting hedges and, accordingly, accounted for these financial commodity derivative contracts using the mark-to-market accounting method. Under this accounting method, changes in the fair value of outstanding financial instruments are recognized as gains or losses in the period of change and are recorded as Gains (Losses) on Mark-to-Market Commodity Derivative Contracts on the Consolidated Statements of Income and Comprehensive Income. The related cash flow impact is reflected in Cash Flows from Operating Activities. During 2019, 2018 and 2017, EOG recognized net gains (losses) on the mark-to-market of financial commodity derivative contracts of $180 million, $(166) million and $20 million, respectively, which included cash received from (payments for) settlements of crude oil and natural gas derivative contracts of $231 million, $(259) million and $7 million, respectively. Crude Oil Derivative Contracts. Prices received by EOG for its crude oil production generally vary from U.S. New York Mercantile Exchange (NYMEX) West Texas Intermediate prices due to adjustments for delivery location (basis) and other factors. EOG has entered into crude oil basis swap contracts in order to fix the differential between pricing in Midland, Texas, and Cushing, Oklahoma (Midland Differential). Presented below is a comprehensive summary of EOG's Midland Differential basis swap contracts for the year ended December 31, 2019. The weighted average price differential expressed in dollars per barrel ($/Bbl) represents the amount of reduction to Cushing, Oklahoma, prices for the notional volumes expressed in barrels per day (Bbld) covered by the basis swap contracts.
| Midland Differential Basis Swap Contracts
|  |  | Volume (Bbld) |  | Weighted Average Price Differential ($/Bbl)
| 2019 |  |  |  |
| January 1, 2019 through December 31, 2019 (closed) |  | 20,000 |  |  | $ | 1.075 |
EOG has also entered into crude oil basis swap contracts in order to fix the differential between pricing in the U.S. Gulf Coast and Cushing, Oklahoma (Gulf Coast Differential). Presented below is a comprehensive summary of EOG's Gulf Coast Differential basis swap contracts for the year ended December 31, 2019. The weighted average price differential expressed in $/Bbl represents the amount of addition to Cushing, Oklahoma, prices for the notional volumes expressed in Bbld covered by the basis swap contracts.
| Gulf Coast Differential Basis Swap Contracts
|  |  | Volume (Bbld) |  | Weighted Average Price Differential ($/Bbl)
| 2019 |  |  |  |
| January 1, 2019 through December 31, 2019 (closed) |  | 13,000 |  |  | $ | 5.572 |
Presented below is a comprehensive summary of EOG's crude oil price swap contracts for the year ended December 31, 2019, with notional volumes expressed in Bbld and prices expressed in $/Bbl.
| Crude Oil Price Swap Contracts
|  |  | Volume (Bbld) |  | Weighted Average Price ($/Bbl)
| 2019 |  |  |  |
| April 2019 (closed) |  | 25,000 |  |  | $ | 60.00 |
| May 1, 2019 through December 31, 2019 (closed) |  | 150,000 |  |  | 62.50 |
| 2020 |  |  |  |
| January 1, 2020 through March 31, 2020 |  | 200,000 |  |  | $ | 59.33 |
| April 1, 2020 through June 30, 2020 |  | 150,000 |  |  | 59.03 |
| July 1, 2020 through September 30, 2020 |  | 50,000 |  |  | 58.32 |
NGLs Derivative Contracts. Presented below is a comprehensive summary of EOG's Mont Belvieu propane (non-TET) price swap contracts for the year ended December 31, 2019, with notional volumes expressed in Bbld and prices expressed in $/Bbl.
| Mont Belvieu Propane Price Swap Contracts
|  |  | Volume (Bbld) |  | Weighted Average Price ($/Bbl)
| 2020 |  |  |  |
| January 1, 2020 through December 31, 2020 |  | 4,000 |  |  | $ | 21.34 |
Natural Gas Derivative Contracts. Presented below is a comprehensive summary of EOG's natural gas price swap contracts for the year ended December 31, 2019, with notional volumes expressed in million British thermal units (MMBtu) per day (MMBtud) and prices expressed in dollars per MMBtu ($/MMBtu).
| Natural Gas Price Swap Contracts
|  |  | Volume (MMBtud) |  | Weighted Average Price ($/MMBtu)
| 2019 |  |  |  |
| April 1, 2019 through October 31, 2019 (closed) |  | 250,000 |  |  | $ | 2.90 |
Prices received by EOG for its natural gas production generally vary from NYMEX Henry Hub prices due to adjustments for delivery location (basis) and other factors. EOG has entered into natural gas basis swap contracts in order to fix the differential between pricing in the Rocky Mountain area and NYMEX Henry Hub prices (Rockies Differential). Presented below is a comprehensive summary of EOG's Rockies Differential basis swap contracts for the year ended December 31, 2019. The weighted average price differential expressed in $/MMBtu represents the amount of reduction to NYMEX Henry Hub prices for the notional volumes expressed in MMBtud covered by the basis swap contracts.
| Rockies Differential Basis Swap Contracts
|  |  | Volume (MMBtud) |  | Weighted Average Price Differential ($/MMBtu)
| 2020 |  |  |  |
| January 1, 2020 through December 31, 2020 |  | 30,000 |  |  | $ | 0.55 |
EOG has also entered into natural gas basis swap contracts in order to fix the differential between pricing at the Houston Ship Channel (HSC) and NYMEX Henry Hub prices (HSC Differential). Presented below is a comprehensive summary of EOG's HSC Differential basis swap contracts for the year ended December 31, 2019. The weighted average price differential expressed in $/MMBtu represents the amount of reduction to NYMEX Henry Hub prices for the notional volumes expressed in MMBtud covered by the basis swap contracts.
| HSC Differential Basis Swap Contracts
|  |  | Volume (MMBtud) |  | Weighted Average Price Differential ($/MMBtu)
| 2020 |  |  |  |
| January 1, 2020 through December 31, 2020 |  | 60,000 |  |  | $ | 0.05 |
EOG has also entered into natural gas basis swap contracts in order to fix the differential between pricing at the Waha Hub in West Texas and NYMEX Henry Hub prices (Waha Differential). Presented below is a comprehensive summary of EOG's Waha Differential basis swap contracts for the year ended December 31, 2019. The weighted average price differential expressed in $/MMBtu represents the amount of reduction to NYMEX Henry Hub prices for the notional volumes expressed in MMBtud covered by the basis swap contracts.
| Waha Differential Basis Swap Contracts
|  |  | Volume (MMBtud) |  | Weighted Average Price Differential ($/MMBtu)
| 2020 |  |  |  |
| January 1, 2020 through December 31, 2020 |  | 50,000 |  |  | $ | 1.40 |
Commodity Derivatives Location on Balance Sheet. The following table sets forth the amounts and classification of EOG's outstanding derivative financial instruments at December 31, 2019 and 2018, respectively. Certain amounts may be presented on a net basis on the consolidated financial statements when such amounts are with the same counterparty and subject to a master netting arrangement (in thousands):
|  |  |  | Fair Value at December 31,
Description |  | Location on Balance Sheet |  | 2019 |  | 2018
Asset Derivatives |  |  |  |  |  |
Crude oil, NGLs and natural gas derivative contracts - |  |  |  |  |  |
Current portion |  | Assets from Price Risk Management Activities (1) |  | $ | 1,299 |  |  | $ | 23,806 |
Liability Derivatives |  |  |  |  |  |  |  |
Crude oil, NGLs and natural gas derivative contracts - |  |  |  |  |  |  |  |
Current portion |  | Liabilities from Price Risk Management Activities (2) |  | $ | 20,194 |  |  | $ | — |
(1) | The current portion of Assets from Price Risk Management Activities consists of gross assets of $3 million, partially offset by gross liabilities of $2 million, at December 31, 2019.
(2) | The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $23 million, partially offset by gross assets of $3 million at December 31, 2019.
Credit Risk. Notional contract amounts are used to express the magnitude of a financial derivative. The amounts potentially subject to credit risk, in the event of nonperformance by the counterparties, are equal to the fair value of such contracts (see Note 13). EOG evaluates its exposure to significant counterparties on an ongoing basis, including those arising from physical and financial transactions. In some instances, EOG renegotiates payment terms and/or requires collateral, parent guarantees or letters of credit to minimize credit risk. At December 31, 2019, EOG's net accounts receivable balance related to United States hydrocarbon sales included three receivable balances, each of which accounted for more than 10% of the total balance. The receivables were due from three petroleum refinery companies. The related amounts were collected during early 2020. At December 31, 2018, EOG's net accounts receivable balance related to United States hydrocarbon sales included three receivable balances, each of which accounted for more than 10% of the total balance. The receivables were due from three petroleum refinery companies. The related amounts were collected during early 2019. In 2019 and 2018, all natural gas from EOG's Trinidad operations was sold to the National Gas Company of Trinidad and Tobago Limited and its subsidiary. In 2019, all crude oil and condensate from EOG's Trinidad operations was sold to Heritage Petroleum Company Limited (Heritage). In 2018, all crude oil and condensate from EOG's Trinidad operations was sold to Heritage and its predecessor, the Petroleum Company of Trinidad and Tobago Limited. In 2019 and 2018, all natural gas from EOG's China operations was sold to Petrochina Company Limited. All of EOG's derivative instruments are covered by International Swap Dealers Association Master Agreements (ISDAs) with counterparties. The ISDAs may contain provisions that require EOG, if it is the party in a net liability position, to post collateral when the amount of the net liability exceeds the threshold level specified for EOG's then-current credit ratings. In addition, the ISDAs may also provide that as a result of certain circumstances, including certain events that cause EOG's credit ratings to become materially weaker than its then-current ratings, the counterparty may require all outstanding derivatives under the ISDA to be settled immediately. See Note 13 for the aggregate fair value of all derivative instruments that were in a net liability position at December 31, 2019. EOG had no collateral posted and held no collateral at December 31, 2019 and 2018. Substantially all of EOG's accounts receivable at December 31, 2019 and 2018 resulted from hydrocarbon sales and/or joint interest billings to third-party companies, including foreign state-owned entities in the oil and gas industry. This concentration of customers and joint interest owners may impact EOG's overall credit risk, either positively or negatively, in that these entities may be similarly affected by changes in economic or other conditions. In determining whether or not to require collateral or other credit enhancements from a customer, EOG typically analyzes the entity's net worth, cash flows, earnings and credit ratings. Receivables are generally not collateralized. During the three-year period ended December 31, 2019, credit losses incurred on receivables by EOG have been immaterial.

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI http://asc.fasb.org/topic&trid=2229140 + Details
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