Investments in Affiliates - Summary of Transactions in, and Earnings from, Investments in Affiliates (Excluding Affiliated Money Market Funds) (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments In And Advances To Affiliates [Line Items]
Beginning Value			$ 1,692,470,773
Change in Unrealized Appreciation (Depreciation)	$ 128,688	$ (90,232)	(554,636)	$ 138,742
Ending Value	1,731,547,718		1,731,547,718
Dividend Income	13,546,440	13,676,615	25,434,009	28,045,719
Investment, Affiliated Issuer [Member]
Investments In And Advances To Affiliates [Line Items]
Beginning Value			908,120,125
Ending Value	1,046,657,716		1,046,657,716
Affiliated Investments [Member]
Investments In And Advances To Affiliates [Line Items]
Purchases at Cost	736,035,413	1,119,210,361	1,161,205,568	2,300,076,293
Proceeds from Sales	(697,831,485)	(1,081,991,364)	(1,022,392,644)	(2,544,184,903)
Change in Unrealized Appreciation (Depreciation)		(80,454)	(275,333)	174,317
Affiliated Investments [Member] | Investment, Affiliated Issuer [Member]
Investments In And Advances To Affiliates [Line Items]
Beginning Value	1,008,453,788	1,144,277,704	908,120,125	1,425,350,540
Ending Value	1,046,657,716	1,181,416,247	1,046,657,716	1,181,416,247
Dividend Income	13,546,440	13,676,615	25,434,009	28,045,719
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member]
Investments In And Advances To Affiliates [Line Items]
Purchases at Cost	736,035,413	1,119,210,361	1,161,205,568	2,300,076,293
Proceeds from Sales	(697,831,485)	(1,081,991,364)	(1,022,392,644)	(2,544,184,903)
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member] | Investment, Affiliated Issuer [Member]
Investments In And Advances To Affiliates [Line Items]
Beginning Value	793,347,723	1,002,772,527	692,738,727	1,284,100,134
Ending Value	831,551,651	1,039,991,524	831,551,651	1,039,991,524
Dividend Income	10,868,169	12,125,677	19,989,299	25,136,288
Affiliated Investments [Member] | Invesco Treasury Collateral ETF [Member]
Investments In And Advances To Affiliates [Line Items]
Change in Unrealized Appreciation (Depreciation)		(80,454)	(275,333)	174,317
Affiliated Investments [Member] | Invesco Treasury Collateral ETF [Member] | Investment, Affiliated Issuer [Member]
Investments In And Advances To Affiliates [Line Items]
Beginning Value	215,106,065	141,505,177	215,381,398	141,250,406
Ending Value	215,106,065	141,424,723	215,106,065	141,424,723
Dividend Income	$ 2,678,271	$ 1,550,938	$ 5,444,710	$ 2,909,431