STATEMENTS OF FINANCIAL CONDITION (Unaudited) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Trading Equity:
Unrestricted cash	$ 51,008,098	$ 54,498,150
Restricted cash	5,943,221	6,938,556
Total cash	56,951,319	61,436,706
Net unrealized gain (loss) on open contracts	(4,017,777)	89,949
Total Trading Equity	52,933,542	61,526,655
Interest receivable (MSSB)	2,334	1,376
Total Assets	52,935,876	61,528,031
Liabilities:
Redemptions payable	1,557,490	2,022,443
Accrued brokerage fees (MS&Co.)	278,463	297,607
Accrued management fees	92,821	99,203
Total Liabilities	1,928,774	2,419,253
Partners' Capital:
Limited Partners (5,050,034.900 and 5,973,858.709 Units, respectively)	50,376,630	58,393,243
General Partner (63,202.055 and 73,202.055 Units, respectively)	630,472	715,535
Total Partners' Capital	51,007,102	59,108,778
Total Liabilities and Partners' Capital	52,935,876	61,528,031
NET ASSET VALUE PER UNIT (in dollars per unit)	$ 9.98	$ 9.77
MS&Co. [Member]
Trading Equity:
Net unrealized gain (loss) on open contracts	(4,050,660)	(146,410)
MSIP [Member]
Trading Equity:
Net unrealized gain (loss) on open contracts	$ 32,883	$ 236,359