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Condensed Consolidating Financial Information (Narrative) (Details) (USD $) In Billions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items] |
Guarantor Obligations, Current Carrying Value | 1.05 us-gaap_GuaranteeObligationsCurrentCarryingValue
Genesis NEJD Pipeline, LLC [Member] |
Condensed Financial Statements, Captions [Line Items] |
Percentage of equity interest | 100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = gel_GenesisNejdPipelineLlcMember

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- Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References No definition available. + Details
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- Details
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Balance Type: |
Period Type: |