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Employee Benefit Plans (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2023
Alkali Pension Plan |
Defined Benefit Plan Disclosure [Line Items] |
Period of credited service required by benefit plan | 1 year

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- Definition Defined Benefit Plan, Requisite Service Period + References No definition available. + Details
Name: | gel_DefinedBenefitPlanRequisiteServicePeriod
Namespace Prefix: | gel_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PlanNameAxis=gel_AlkaliPensionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |