Investments in Affiliates (Tables)

9 Months Ended

Sep. 30, 2019

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

Summary of Transactions in, and Earnings from, Investments in Affiliates (Excluding Affiliated Money Market Funds)

The following is a summary of the transactions in, and earnings from, investments in affiliates (excluding affiliated money market funds) 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
	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

The following is a summary of the transactions in, and earnings from, investments in affiliates (excluding affiliated money market mutual funds) for the three and nine months ended September 30, 2018.

	Value 06/30/2018		Purchases at Cost		Proceeds from Sales		Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 09/30/2018		Dividend Income
Invesco Treasury Collateral ETF	$	80,325,270	$	—	$	—	$	(499,620	)	$	—	$	79,825,650	$	889,134
	Value 12/31/2017		Purchases at Cost		Proceeds from Sales		Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 09/30/2018		Dividend Income
Invesco Treasury Collateral ETF	$	79,689,390	$	—	$	—	$	136,260		$	—	$	79,825,650	$	889,134