Investments in Affiliates (Tables)

9 Months Ended

Sep. 30, 2020

Investments In And Advances To Affiliates Schedule Of Investments [Abstract]

Summary of Transactions in, and Earnings from, Investments in Affiliates

The following is a summary of the transactions in, and earnings from, investments in affiliates for the three and nine months ended September 30, 2020.

	Value 06/30/2020		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 09/30/2020		Dividend Income
Invesco Treasury Collateral    ETF	$	80,090,600	$	—	$	—		$	(52,990	)	$	—	$	80,037,610	$	58,024
Investments in Affiliated    Money Market Funds:
Invesco Premier U.S.    Government Money    Portfolio, Institutional    Class		216,108,596		190,622,258		(406,730,854	)		—			—		—		11,735
Invesco Government &    Agency Portfolio, Institutional    Class		—		554,055,482		(13,204,279	)		—			—		540,851,203		1,378
Total	$	296,199,196	$	744,677,740	$	(419,935,133	)	$	(52,990	)	$	—	$	620,888,813	$	71,137

	Value 12/31/2019		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)		Realized Gain (Loss)		Value 09/30/2020		Dividend Income
Invesco Treasury Collateral    ETF	$	79,893,780	$	—	$	—		$	143,830	$	—	$	80,037,610	$	573,935
Investments in Affiliated    Money Market Funds:
Invesco Premier U.S.    Government Money    Portfolio, Institutional    Class		25,736,227		1,566,305,879		(1,592,042,106	)		—		—		—		665,495
Invesco Government &    Agency Portfolio, Institutional    Class		—		554,055,482		(13,204,279	)		—		—		540,851,203		1,378
Total	$	105,630,007	$	2,120,361,361	$	(1,605,246,385	)	$	143,830	$	—	$	620,888,813	$	1,240,808

The following is a summary of the transactions in, and earnings from, investments in affiliates for the three and nine months ended September 30, 2019.

	Value 06/30/2019		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 09/30/2019		Dividend Income
Invesco Treasury Collateral    ETF	$	79,935,415	$	—	$	—		$	(15,140	)	$	—	$	79,920,275	$	441,467
Investments in Affiliated    Money Market Funds:
Invesco Premier U.S.    Government Money    Portfolio, Institutional    Class		22,018,773		159,197,124		(164,077,025	)		—			—		17,138,872		99,673
Total	$	101,954,188	$	159,197,124	$	(164,077,025	)	$	(15,140	)	$	—	$	97,059,147	$	541,140

	Value 12/31/2018		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)		Realized Gain (Loss)		Value 09/30/2019		Dividend Income
Invesco Treasury Collateral    ETF	$	79,818,080	$	—	$	—		$	102,195	$	—	$	79,920,275	$	1,381,607
Investments in Affiliated    Money Market Funds:
Invesco Premier U.S.    Government Money    Portfolio, Institutional    Class		22,398,721		638,558,101		(643,817,950	)		—		—		17,138,872		346,738
Total	$	102,216,801	$	638,558,101	$	(643,817,950	)	$	102,195	$	—	$	97,059,147	$	1,728,345