XML 43 R28.htm IDEA: XBRL DOCUMENT v3.22.0.1

CONTRACTS AND AGREEMENTS - Brokerage Commission (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Commissions accrued to brokers	$ 794,337	$ 1,879,043	$ 1,155,153
Percentage of commissions accrued	0.24%	0.47%	0.38%
Rebalancing Investments Transaction [Member]
Commissions accrued to brokers	$ 712,376	$ 1,636,443	$ 964,567
Percentage of commissions accrued	89.68%	87.09%	83.50%
Creation And Redemption Activity [Member]
Commissions accrued to brokers	$ 81,961	$ 242,600	$ 190,586
Percentage of commissions accrued	10.32%	12.91%	16.50%

X

- Definition

Percentage of Average Daily Net Assets

+ References

No definition available.

+ Details

Name:	ung_PercentageOfAverageDailyNetAssets
Namespace Prefix:	ung_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees, order flow fees, and clearance fees.

+ References

No definition available.

+ Details

Name:	us-gaap_FloorBrokerageExchangeAndClearanceFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=ung_RebalancingInvestmentsTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=ung_TradesNecessitatedByCreationAndRedemptionActivityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: