Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 CreationUnit shares	Dec. 31, 2021 shares	Feb. 23, 2015 shares
Organization [Line Items]
General shares, shares issued	40	40	40
Ratio of the notional value of futures contracts	2.00%
Ratio of the notional value of futures contracts	1.66%
Treasury obligation measurement maximum maturity period	12 months
Number of shares issued per creation unit	100,000
Minimum number of Creation Units that can be purchased | CreationUnit	1
Invesco Capital Management LLC [Member]
Organization [Line Items]
Purchase agreement transaction date	Feb. 23, 2015