Condensed Schedule of Investments (Parenthetical) - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Investment Holdings [Line Items]
Percentage of Partners' Capital (in hundredths)	71.11%
U.S. Treasury Bills, 0.005% Maturity At 10/15/2015 [Member]
Investment Holdings [Line Items]
Investment in U.S. Treasury bills, Amortized cost	$ 13,799,793
Investment, Interest rate	0.005%
Percentage of Partners' Capital (in hundredths)	13.12%
U.S. Treasury Bills, 0.025% Maturity At 09/24/2015 [Member]
Investment Holdings [Line Items]
Investment in U.S. Treasury bills, Amortized cost	$ 24,999,842
Investment, Interest rate	0.025%
Percentage of Partners' Capital (in hundredths)	23.77%
U.S. Treasury Bills, 0.025% Maturity At 09/24/2015 [Member]
Investment Holdings [Line Items]
Investment in U.S. Treasury bills, Amortized cost	$ 24,999,842
Investment, Interest rate	0.025%
Percentage of Partners' Capital (in hundredths)	23.77%
U.S. Treasury Bills, 0.005% Maturity At 10/15/2015 [Member]
Investment Holdings [Line Items]
Investment in U.S. Treasury bills, Amortized cost	$ 14,149,778
Investment, Interest rate	0.005%
Percentage of Partners' Capital (in hundredths)	13.46%
Futures and Forward Contracts [Member] | Short [Member]
Investment Holdings [Line Items]
Percentage of Partners' Capital (in hundredths)	(0.56%)	4.37%
Futures and Forward Contracts [Member] | Interest Rate [Member] | Short [Member]
Investment Holdings [Line Items]
Percentage of Partners' Capital (in hundredths)	(0.05%)
Futures and Forward Contracts [Member] | Maximum [Member] | Interest Rate [Member] | Short [Member]
Investment Holdings [Line Items]
Percentage of Partners' Capital (in hundredths)		0.005%