XML 19 R4.htm IDEA: XBRL DOCUMENT
v3.19.1

Condensed Schedule of Investments (Parenthetical) | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($)
Collateral Amount on Open Futures Contracts | $ 978,236
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.37%, 4/04/2019 [Member] |
Expiration date | 4/04/2019
Interest Rate | 2.37%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.41%, 4/11/2019 [Member] |
Expiration date | 4/11/2019
Interest Rate | 2.41%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.42%, 4/18/2019 [Member] |
Expiration date | 4/18/2019
Interest Rate | 2.42%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.43%, 4/25/2019 [Member] |
Expiration date | 4/25/2019
Interest Rate | 2.43%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.46%, 5/02/2019 [Member] |
Expiration date | 5/02/2019
Interest Rate | 2.46%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.47%, 5/09/2019 [Member] |
Expiration date | 5/09/2019
Interest Rate | 2.47%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.48%, 5/16/2019 [Member] |
Expiration date | 5/16/2019
Interest Rate | 2.48%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.50%, 5/23/2019 [Member] |
Expiration date | 5/23/2019
Interest Rate | 2.50%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.49%, 5/30/2019 [Member] |
Expiration date | 5/30/2019
Interest Rate | 2.49%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.51%, 6/06/2019 [Member] |
Expiration date | 6/06/2019
Interest Rate | 2.51%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.51%, 6/13/2019 [Member] |
Expiration date | 6/13/2019
Interest Rate | 2.51%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.49%, 6/20/2019 [Member] |
Expiration date | 6/20/2019
Interest Rate | 2.49%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.49%, 6/27/2019 [Member] |
Expiration date | 6/27/2019
Interest Rate | 2.49%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.47%, 7/05/2019 [Member] |
Expiration date | 7/05/2019
Interest Rate | 2.47%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.48%, 7/11/2019 [Member] |
Expiration date | 7/11/2019
Interest Rate | 2.48%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.47%, 7/18/2019 [Member] |
Expiration date | 7/18/2019
Interest Rate | 2.47%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.47%, 7/25/2019 [Member] |
Expiration date | 7/25/2019
Interest Rate | 2.47%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.48%, 8/01/2019 [Member] |
Expiration date | 8/01/2019
Interest Rate | 2.48%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.46%, 8/08/2019 [Member] |
Expiration date | 8/08/2019
Interest Rate | 2.46%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.47%, 8/15/2019 [Member] |
Expiration date | 8/15/2019
Interest Rate | 2.47%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.47%, 8/22/2019 [Member] |
Expiration date | 8/22/2019
Interest Rate | 2.47%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.48%, 8/29/2019 [Member] |
Expiration date | 8/29/2019
Interest Rate | 2.48%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.48%, 9/05/2019 [Member] |
Expiration date | 9/05/2019
Interest Rate | 2.48%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.48%, 9/12/2019 [Member] |
Expiration date | 9/12/2019
Interest Rate | 2.48%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.46%, 9/19/2019 [Member] |
Expiration date | 9/19/2019
Interest Rate | 2.46%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills: 2.41%, 9/26/2019 [Member] |
Expiration date | 9/26/2019
Interest Rate | 2.41%

X
- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The list of dates or date range within which the options may be exercised of the investment subject to option. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13.5(d)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.4(b)) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 + Details
Name: | us-gaap_InvestmentOwnedSubjectToOptionExerciseDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | invest_InvestmentAxis=us-gaap_CashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesClassAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsElevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsThirteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsFourteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsFifteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeventeenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsEighteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesNinteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesTwentyThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesTwentyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | unl_InvestmentSecuritiesSeriesOneAxis=unl_UsTreasuryBillsSeriesTwentySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |