Name:	ngl_FixedPriceSaleCommitments
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Data Type:	xbrli:monetaryItemType
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Represents the volume of natural gas liquids and crude oil supplies in connection with an unconditional fixed-price sale that has not been recognized for financial reporting purposes.

No definition available.

Name:	ngl_FixedPriceSaleCommitmentsVolume
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Data Type:	dtr-types:volumeItemType
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Period Type:	instant

Fixed-Price Sale Commitments Volume, Due in One Year

No definition available.

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Fixed-price sale commitments (in barrels/gallons), due in remainder of fiscal year

No definition available.

Name:	ngl_FixedPriceSaleCommitmentsVolumeDueInRemainderOfFiscalYear
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Fixed-price sale commitments (in gallons), due in second year

No definition available.

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Fixed-price sale commitments (in gallons), due in third year

No definition available.

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Unrecorded Unconditional Obligation Fixed-Price Sales Contracts, Due in One Year

No definition available.

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Unrecorded Unconditional Obligation Outstanding Fixed-Price Sales Contracts, Due in Second Year

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingFixedPriceSalesContractsDueInSecondYear
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Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Fixed Price Sales Contracts, due in remainder of the fiscal year

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingFixedPriceSalesContractsDueinRemainderofFiscalYear
Namespace Prefix:	ngl_
Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Fixed-Price Sales Contracts, due in third year

No definition available.

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Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Contracts Volume, Due Remainder of Fiscal Year

No definition available.

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Data Type:	dtr-types:volumeItemType
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Represents the amount of natural gas liquids and crude oil supplies in connection with an unconditional index-price sale that has not been recognized for financial reporting purposes.

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingIndexPriceSalesContracts
Namespace Prefix:	ngl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts, Due in First Year

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingIndexPriceSalesContractsDueInFirstYear
Namespace Prefix:	ngl_
Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts, Due in Fourth Year

No definition available.

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Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts, remainder of the year

No definition available.

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Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts, due in second year

No definition available.

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Namespace Prefix:	ngl_
Data Type:	xbrli:monetaryItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts Volumes, due in the third year

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingIndexPriceSalesContractsDueinThirdYear
Namespace Prefix:	ngl_
Data Type:	xbrli:monetaryItemType
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Represents the volume of natural gas liquids and crude oil supplies in connection with an unconditional index-price sale that has not been recognized for financial reporting purposes.

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingIndexPriceSalesContractsVolume
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Data Type:	dtr-types:volumeItemType
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Period Type:	instant

Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts Volume, Due in Fourth Year

No definition available.

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Data Type:	dtr-types:volumeItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts Volume, Due in the First Year

No definition available.

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Data Type:	dtr-types:volumeItemType
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Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts Volume, Due in the second year

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingIndexPriceSalesContractsVolumeDueInTheSecondYear
Namespace Prefix:	ngl_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	instant

Unrecorded Unconditional Obligation Outstanding Index Price Sales Contracts Volume, Due in the Third Year

No definition available.

Name:	ngl_UnrecordedUnconditionalObligationOutstandingIndexPriceSalesContractsVolumeDueInTheThirdYear
Namespace Prefix:	ngl_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	instant

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

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Balance Type:	debit
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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.

No definition available.

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

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Data Type:	na
Balance Type:
Period Type:

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