Investments in Affiliates (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2019.

	Value 12/31/2018		Purchases at Cost		Proceeds from Sales		Change in Unrealized Appreciation (Depreciation)		Realized Gain (Loss)		Value 03/31/2019		Dividend Income
Invesco Treasury    Collateral ETF	$	250,145,856	$	—	$	—	$	118,620	$	—	$	250,264,476	$	1,445,333

The following is a summary of the transactions in, and earnings from, investments in affiliates (excluding affiliated money market funds) for the three months ended March 31, 2018.

	Value 12/31/2017		Purchases at Cost		Proceeds from Sales		Change in Unrealized Appreciation (Depreciation)		Realized Gain (Loss)		Value 03/31/2018		Dividend Income
PowerShares Treasury    Collateral Portfolio	$	249,742,548	$	—	$	—	$	972,684	$	—	$	250,715,232	$	—