The annual rate paid for the use of letters of credit.

No definition available.

Name:	gel_LetterOfCreditFeePercentage
Namespace Prefix:	gel_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility, aggregate maximum borrowing capacity after accordion feature adjustment.

+ References

No definition available.

+ Details

Name:	gel_LineOfCreditFacilityAggregateMaximumBorrowingCapacity
Namespace Prefix:	gel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Extension Period

+ References

No definition available.

+ Details

Name:	gel_LineOfCreditFacilityExtensionPeriod
Namespace Prefix:	gel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Number Of Extension Periods

+ References

No definition available.

+ Details

Name:	gel_LineOfCreditFacilityNumberOfExtensionPeriods
Namespace Prefix:	gel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Of Stock, Percentage Of Ownership Sold

+ References

No definition available.

+ Details

Name:	gel_SaleOfStockPercentageOfOwnershipSold
Namespace Prefix:	gel_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467658&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=gel_CameronHighwayOilPipelineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gel_SeniorSecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=us-gaap_PublicUtilitiesInventoryPetroleumProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gel_SeniorSecuredCreditFacilityRevolvingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gel_FederalFundsEffectiveRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gel_LiborRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gel_EurodollarRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gel_AlternateBaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gel_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Senior Secured Credit Facility) (Details)				1 Months Ended	12 Months Ended
Debt (Senior Secured Credit Facility) (Details)	Nov. 17, 2021 USD ($)	Nov. 16, 2021	Apr. 08, 2021 USD ($) extension	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Cash proceeds from the sale of a noncontrolling interest in a subsidiary					$ 418,140,000	$ 0	$ 0
Repayments of senior secured credit facility					1,371,000,000	1,338,600,000	825,900,000
Loss on extinguishment of debt					$ 1,627,000	$ 31,730,000	$ 0
Affiliated Entity \| CHOPS
Debt Instrument [Line Items]
Percentage of ownership in equity interest sold		0.36
Cash proceeds from the sale of a noncontrolling interest in a subsidiary	$ 418,000,000
Line of Credit \| Senior Secured Credit Facility
Debt Instrument [Line Items]
Senior secured credit facility, maximum borrowing capacity			$ 950,000,000
Extension period			1 year
Number of extensions \| extension			2
Commitment fee percentage					0.50%
Credit facility aggregate accordion feature				$ 200,000,000	$ 200,000,000
Senior secured credit facility, amount outstanding				49,000,000	49,000,000
Letters of credit, outstanding amount				1,300,000	1,300,000
Total amount available for borrowings, remaining borrowing capacity				599,700,000	599,700,000
Line of Credit \| Senior Secured Credit Facility \| Petroleum Products
Debt Instrument [Line Items]
Senior secured credit facility, amount outstanding				9,700,000	$ 9,700,000
Line of Credit \| Senior Secured Credit Facility \| Minimum
Debt Instrument [Line Items]
Commitment fee percentage					0.30%
Line of Credit \| Senior Secured Credit Facility \| Maximum
Debt Instrument [Line Items]
Commitment fee percentage					0.50%
Letters of credit, outstanding amount				100,000,000	$ 100,000,000
Line of Credit \| Revolving Loan \| Revolving Credit Facility
Debt Instrument [Line Items]
Senior secured credit facility, maximum borrowing capacity			$ 650,000,000
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Federal Funds Effective Rate
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					0.50%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| LIBOR Rate \| Maximum
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					1.00%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Eurodollar Rate
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					3.75%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Eurodollar Rate \| Minimum
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					2.25%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Eurodollar Rate \| Maximum
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					3.75%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Alternate Base Rate
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					2.75%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Alternate Base Rate \| Minimum
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					1.25%
Line of Credit \| Revolving Loan \| Revolving Credit Facility \| Alternate Base Rate \| Maximum
Debt Instrument [Line Items]
Interest rate spreads senior secured credit facility					275.00%
Line of Credit \| Term Loan
Debt Instrument [Line Items]
Senior unsecured notes, principal				300,000,000	$ 300,000,000
Repayments of senior secured credit facility	$ 300,000,000
Loss on extinguishment of debt				$ 2,300,000
Line of Credit \| Term Loan \| Revolving Credit Facility \| Eurodollar Rate \| Maximum
Debt Instrument [Line Items]
Interest rate margin				3.75%	3.75%
Line of Credit \| Term Loan \| Revolving Credit Facility \| Alternate Base Rate \| Maximum
Debt Instrument [Line Items]
Interest rate margin				2.75%	2.75%
Letter of Credit \| Senior Secured Credit Facility
Debt Instrument [Line Items]
Letter of credit, fee percentage					3.75%
Letter of Credit \| Senior Secured Credit Facility \| Eurodollar Rate \| Minimum
Debt Instrument [Line Items]
Letter of credit, fee percentage					2.25%
Letter of Credit \| Senior Secured Credit Facility \| Eurodollar Rate \| Maximum
Debt Instrument [Line Items]
Letter of credit, fee percentage					3.75%