Investments in Affiliates - Summary of Transactions in, and Earnings from, Investments in Affiliates (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments in and Advances to Affiliates [Line Items]
Beginning Value	$ 710,772,102
Change in Unrealized Appreciation (Depreciation)	(90,747)	$ 171,804	$ 178,637
Ending Value	767,686,990	710,772,102
Dividend Income	21,577,336	24,359,948	12,480,118
Investment, Affiliated Issuer [Member]
Investments in and Advances to Affiliates [Line Items]
Beginning Value	367,815,458
Ending Value	521,903,775	367,815,458
Affiliated Investments [Member]
Investments in and Advances to Affiliates [Line Items]
Purchases at Cost	1,088,771,837	1,461,510,451	3,155,758,046
Proceeds from Sales	(934,677,851)	(1,611,536,659)	(3,465,598,343)
Change in Unrealized Appreciation (Depreciation)	(5,669)	279,064	(240,740)
Realized Gain (Loss)			0
Affiliated Investments [Member] | Investment, Affiliated Issuer [Member]
Investments in and Advances to Affiliates [Line Items]
Beginning Value	367,815,458	517,562,602	827,643,639
Ending Value	521,903,775	367,815,458	517,562,602
Dividend Income	21,577,336	24,359,948	12,480,118
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member]
Investments in and Advances to Affiliates [Line Items]
Purchases at Cost	1,088,771,837	1,431,035,264	3,155,758,046
Proceeds from Sales	(934,677,851)	(1,611,536,659)	(3,465,598,343)
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member] | Investment, Affiliated Issuer [Member]
Investments in and Advances to Affiliates [Line Items]
Beginning Value	248,080,509	428,581,904	738,422,201
Ending Value	402,174,495	248,080,509	428,581,904
Dividend Income	15,604,807	19,001,072	11,257,863
Affiliated Investments [Member] | Invesco Treasury Collateral ETF [Member]
Investments in and Advances to Affiliates [Line Items]
Purchases at Cost		30,475,187
Change in Unrealized Appreciation (Depreciation)	(5,669)	279,064	(240,740)
Affiliated Investments [Member] | Invesco Treasury Collateral ETF [Member] | Investment, Affiliated Issuer [Member]
Investments in and Advances to Affiliates [Line Items]
Beginning Value	119,734,949	88,980,698	89,221,438
Ending Value	119,729,280	119,734,949	88,980,698
Dividend Income	$ 5,972,529	$ 5,358,876	$ 1,222,255