STATEMENTS OF FINANCIAL CONDITION (Unaudited) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Trading Equity:
Unrestricted cash	$ 45,574,799	$ 54,498,150
Restricted cash	6,652,085	6,938,556
Total cash	52,226,884	61,436,706
Net unrealized gain (loss) on open contracts	(1,553,595)	89,949
Total Trading Equity	50,673,289	61,526,655
Interest receivable (MS&Co. & MSSB)	2,840	1,376
Total Assets	50,676,129	61,528,031
Liabilities:
Redemptions payable	936,100	2,022,443
Accrued brokerage fees (MS&Co.)	251,917	297,607
Accrued management fees	83,973	99,203
Total Liabilities	1,271,990	2,419,253
Partners' Capital:
Limited Partners (4,755,773.363 and 5,973,858.709 Units, respectively)	48,852,650	58,393,243
General Partner (53,687.055 and 73,202.055 Units, respectively)	551,489	715,535
Total Partners' Capital	49,404,139	59,108,778
Total Liabilities and Partners' Capital	50,676,129	61,528,031
NET ASSET VALUE PER UNIT (in dollars per unit)	$ 10.27	$ 9.77
MS&Co. [Member]
Trading Equity:
Net unrealized gain (loss) on open contracts	(1,560,502)	(146,410)
MSIP [Member]
Trading Equity:
Net unrealized gain (loss) on open contracts	$ 6,907	$ 236,359