XML 35 R20.htm IDEA: XBRL DOCUMENT
v3.21.2

CONTRACTS AND AGREEMENTS (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
CONTRACTS AND AGREEMENTS |
Schedule of brokerage commissions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended | ​ | Six months ended | ​
​ | ​ | June 30, 2021 | ​ | June 30, 2020 | ​
Total commissions accrued to brokers | ​ | $ | 436,130 | ​ | $ | 1,168,244 | ​
Total commissions as annualized percentage of average total net assets |  | ​ | 0.29 | % | ​ | 0.55 | %
Commissions accrued as a result of rebalancing | ​ | $ | 395,670 | ​ | $ | 1,025,730 | ​
Percentage of commissions accrued as a result of rebalancing | ​ | ​ | 90.72 | % | ​ | 87.80 | %
Commissions accrued as a result of creation and redemption activity | ​ | $ | 40,460 | ​ | $ | 142,514 | ​
Percentage of commissions accrued as a result of creation and redemption activity | ​ |  | 9.28 | % |  | 12.20 | %

X
- Definition Brokerage Commissions + References No definition available. + Details
Name: | ung_BrokerageCommissionsTableTextBlock
Namespace Prefix: | ung_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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