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Represents the amount of total expense expected to be recognized from the equity-based compensation arrangements.

No definition available.

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Represents the amount of expense expected to be recognized during the first fiscal year following the latest fiscal year arising from the equity-based compensation arrangements.

No definition available.

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Period Type:	duration

Allocated Share Based Compensation Expense, Year Two

No definition available.

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Period Type:	duration

Common units canceled by the Partnership to satisfy the minimum employee tax liability in connection with the vesting of certain restricted units.

No definition available.

Name:	ngl_CommonUnitsCanceledDuringPeriod
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Expected Future Expense

No definition available.

Name:	ngl_ExpectedFutureExpenseAbstract
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Data Type:	xbrli:stringItemType
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Represents the amount of distributions that will accrue to or be paid during the period in which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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The number of equity based payment instruments, excluding stock (or unit) options, that will vest in subsequent periods.

No definition available.

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Data Type:	xbrli:sharesItemType
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Value of common units canceled by the Partnership to satisfy the minimum employee tax liability in connection with the vesting of certain restricted units.

No definition available.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section S99
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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	dtr-types:perShareItemType
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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
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Data Type:	xbrli:stringItemType
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Name:	us-gaap_VestingAxis=ngl_VestingIn2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_VestingAxis=ngl_VestingIn2023Member
Namespace Prefix:
Data Type:	na
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