XML 38 R23.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

FINANCIAL HIGHLIGHTS (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2024
FINANCIAL HIGHLIGHTS |
Schedule of per unit performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Three months ended | ​ | Six months ended |  | Six months ended | ​
​ | ​ | June 30, 2024 | ​ | June 30, 2023 | ​ | June 30, 2024 | ​ | June 30, 2023 | ​
​ |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) |  | (Unaudited) | ​
Per Share Operating Performance: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Net asset value, beginning of period | ​ | $ | 39.99 | ​ | $ | 33.77 | ​ | $ | 35.23 | ​ | $ | 35.45 | ​
Total income (loss) | ​ |  | 0.64 | ​ |  | (1.01) | ​ |  | 5.48 | ​ |  | (2.63) | ​
Total expenses | ​ |  | (0.09) | ​ |  | (0.06) | ​ |  | (0.17) | ​ |  | (0.12) | ​
Net increase (decrease) in net asset value | ​ |  | 0.55 | ​ |  | (1.07) | ​ |  | 5.31 | ​ |  | (2.75) | ​
Net asset value, end of period | ​ | $ | 40.54 | ​ | $ | 32.70 | ​ | $ | 40.54 | ​ | $ | 32.70 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Return | ​ |  | 1.38 | % |  | (3.17) | % |  | 15.07 | % |  | (7.76) | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ratios to Average Net Assets | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Total income (loss) | ​ |  | 1.61 | % |  | (2.45) | % |  | 14.59 | % |  | (6.94) | %
Management fees# | ​ |  | 0.60 | % |  | 0.60 | % |  | 0.60 | % |  | 0.60 | %
Total expenses excluding management fees# | ​ |  | 0.31 | % |  | 0.15 | % |  | 0.30 | % |  | 0.15 | %
Net income (loss) | ​ |  | 1.39 | % |  | (2.64) | % |  | 14.14 | % |  | (7.31) | %
# Annualized.

X
- References No definition available. + Details
Name: | usl_FinancialHighlightsAbstract
Namespace Prefix: | usl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of per unit performance data and other supplemental financial data. + References No definition available. + Details
Name: | usl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock
Namespace Prefix: | usl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration