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v3.21.1

Summary of Significant Accounting Policies (Details) $ in Billions | Mar. 31, 2021 USD ($)
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Revolving Credit Agreement (New Facility) [Member] |
Line of Credit Facility, Maximum Borrowing Capacity | $ 2

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_LineOfCreditFacilityAxis=eog_RevolvingCreditAgreementNewFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |