FAIR VALUE OF FINANCIAL INSTRUMENTS - Summary of Fair Value of Derivative Instruments (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
FAIR VALUE OF FINANCIAL INSTRUMENTS
Derivatives not Accounted for as Hedging Instruments - Futures - Commodity Contracts	$ (43,540,680)	$ 2,337,370

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