Investments in Affiliates - Summary of Transactions in, and Earnings from, Investments in Affiliates (Parenthetical) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Investments In And Advances To Affiliates Schedule Of Investments [Abstract]
Capital gains distributions from Invesco Treasury Collateral ETF	$ 7,452	$ 24,612