XML 47 R36.htm IDEA: XBRL DOCUMENT v3.25.2
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, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Investments In And Advances To Affiliates [Line Items]        
Beginning Value     $ 1,269,897,511  
Change in Unrealized Appreciation (Depreciation) $ (111,502) $ 128,688 (418,539) $ (554,636)
Ending Value 1,002,334,244   1,002,334,244  
Dividend Income 8,497,747 13,546,440 18,108,485 25,434,009
Investment, Affiliated Issuer [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value     876,644,367  
Ending Value 1,002,334,244   1,002,334,244  
Affiliated Investments [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value     876,644,367  
Ending Value 1,002,334,244   1,002,334,244  
Affiliated Investments [Member] | Investment, Affiliated Issuer [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value 799,613,441 1,008,453,788 876,644,367 908,120,125
Purchases at Cost 399,788,197 736,035,413 604,887,271 1,161,205,568
Proceeds from Sales (197,077,591) (697,831,485) (479,075,024) (1,022,392,644)
Change in Unrealized Appreciation (Depreciation) 10,197 0 (122,370) (275,333)
Ending Value 1,002,334,244 1,046,657,716 1,002,334,244 1,046,657,716
Dividend Income 8,497,747 13,546,440 18,108,485 25,434,009
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member] | Investment, Affiliated Issuer [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value 584,374,808 793,347,723 661,273,167 692,738,727
Purchases at Cost 399,788,197 736,035,413 604,887,271 1,161,205,568
Proceeds from Sales (197,077,591) (697,831,485) (479,075,024) (1,022,392,644)
Ending Value 787,085,414 831,551,651 787,085,414 831,551,651
Dividend Income 6,345,911 10,868,169 13,645,080 19,989,299
Affiliated Investments [Member] | Invesco Short Term Treasury ETF [Member] | Investment, Affiliated Issuer [Member]        
Investments In And Advances To Affiliates [Line Items]        
Beginning Value 215,238,633 215,106,065 215,371,200 215,381,398
Change in Unrealized Appreciation (Depreciation) 10,197 0 (122,370) (275,333)
Ending Value 215,248,830 215,106,065 215,248,830 215,106,065
Dividend Income $ 2,151,836 $ 2,678,271 $ 4,463,405 $ 5,444,710