XML 48 R38.htm IDEA: XBRL DOCUMENT v3.24.0.1
Investments in Affiliates - Summary of Transactions in, and Earnings from, Investments in Affiliates (Excluding Affiliated Money Market Funds) (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Investments In And Advances To Affiliates [Line Items]      
Beginning Value $ 2,697,737,111    
Change in Unrealized Appreciation (Depreciation) 336,743 $ 428,208 $ (23,268)
Ending Value 1,692,470,773 2,697,737,111  
Dividend Income 61,814,575 31,109,319 364,565
Investment, Affiliated Issuer [Member]      
Investments In And Advances To Affiliates [Line Items]      
Beginning Value 1,425,350,540    
Ending Value 908,120,125 1,425,350,540  
Affiliated Investments [Member]      
Investments In And Advances To Affiliates [Line Items]      
Purchases at Cost 3,555,261,081 7,464,209,086 4,296,742,105
Proceeds from Sales (4,072,945,337) (8,042,449,383) (3,183,546,911)
Change in Unrealized Appreciation (Depreciation) 453,841 (522,617) (83,187)
Realized Gain (Loss)   (103,308) 32,702
Affiliated Investments [Member] | Investment, Affiliated Issuer [Member]      
Investments In And Advances To Affiliates [Line Items]      
Beginning Value 1,425,350,540 2,004,216,762 891,104,755
Ending Value 908,120,125 1,425,350,540 2,004,216,762
Dividend Income 61,814,575 31,109,319 364,565
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member]      
Investments In And Advances To Affiliates [Line Items]      
Purchases at Cost 3,481,583,930 7,443,115,283 4,284,747,539
Proceeds from Sales (4,072,945,337) (7,970,371,224) (3,183,546,911)
Affiliated Investments [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member] | Investment, Affiliated Issuer [Member]      
Investments In And Advances To Affiliates [Line Items]      
Beginning Value 1,284,100,134 1,811,356,075 710,155,447
Ending Value 692,738,727 1,284,100,134 1,811,356,075
Dividend Income 53,660,273 28,222,082 335,265
Affiliated Investments [Member] | Invesco Short Term Treasury ETF [Member]      
Investments In And Advances To Affiliates [Line Items]      
Purchases at Cost 73,677,151 21,093,803 11,994,566
Proceeds from Sales   (72,078,159)  
Change in Unrealized Appreciation (Depreciation) 453,841 (522,617) (83,187)
Realized Gain (Loss)   (103,308) 32,702
Affiliated Investments [Member] | Invesco Short Term Treasury ETF [Member] | Investment, Affiliated Issuer [Member]      
Investments In And Advances To Affiliates [Line Items]      
Beginning Value 141,250,406 192,860,687 180,949,308
Ending Value 215,381,398 141,250,406 192,860,687
Dividend Income $ 8,154,302 $ 2,887,237 $ 29,300