FAIR VALUE OF FINANCIAL INSTRUMENTS - Summary of Fair Value of Derivative Instruments (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
FAIR VALUE OF FINANCIAL INSTRUMENTS
Derivatives not Accounted for as Hedging Instruments - Futures - Commodity Contracts	$ 2,337,370	$ 2,601,040

Amount of unrealized gain (loss) on open commodity futures contracts.

No definition available.

Name:	bno_UnrealizedGainLossOnOpenCommodityFuturesContractsCurrentAndNoncurrent
Namespace Prefix:	bno_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant