Financial Highlights (Details) - Schedule of Finanacial Highlights (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Capital Unit, Class A [Member]
Per share operating performance:
Net asset value of Trading units, beginning of period (in Dollars per share)	$ 72.55	$ 83.93	$ 76.92	$ 91.32
Trading gain (loss) (in Dollars per share)	$ (1.47)	$ (1.73)	$ (2.44)	$ (5.59)
Investment income (in Dollars per share)	$ 0.10	$ 0.10	$ 0.15	$ 0.32
Expenses (in Dollars per share)	$ (1.69)	$ (2.04)	$ (5.14)	$ (5.79)
Trading income (loss) (in Dollars per share)	$ (3.06)	$ (3.67)	$ (7.43)	$ (11.06)
Net asset value of Trading units, end of period (in Dollars per share)	$ 69.49	$ 80.26	$ 69.49	$ 80.26
Total return:
Total return before incentive fees	(4.22%)	(4.48%)	(9.66%)	(12.18%)
Less incentive fee allocations	0.00%	(0.10%)	0.00%	(0.07%)
Total return	(4.22%)	(4.58%)	(9.66%)	(12.25%)
Ratios to average net assets:
Trading income (loss)	(4.42%)	(1.98%)	(9.98%)	(6.51%)
Expenses:
Expenses, less incentive fees	(2.44%)	(2.58%)	(7.06%)	(6.86%)
Incentive fees	0.00%	(0.10%)	0.00%	(0.07%)
Total expenses	(2.44%)	(2.68%)	(7.06%)	(6.93%)
Capital Unit, Class B [Member]
Per share operating performance:
Net asset value of Trading units, beginning of period (in Dollars per share)	$ 79.38	$ 90.03	$ 83.34	$ 96.98
Trading gain (loss) (in Dollars per share)	$ (1.60)	$ (1.87)	$ (2.68)	$ (5.98)
Investment income (in Dollars per share)	$ 0.10	$ 0.11	$ 0.17	$ 0.34
Expenses (in Dollars per share)	$ (1.46)	$ (1.75)	$ (4.41)	$ (4.82)
Trading income (loss) (in Dollars per share)	$ (2.96)	$ (3.51)	$ (6.92)	$ (10.46)
Net asset value of Trading units, end of period (in Dollars per share)	$ 76.42	$ 86.52	$ 76.42	$ 86.52
Total return:
Total return before incentive fees	(3.73%)	(4.00%)	(8.31%)	(10.85%)
Less incentive fee allocations	0.00%	(0.10%)	0.00%	(0.07%)
Total return	(3.73%)	(4.10%)	(8.31%)	(10.92%)
Ratios to average net assets:
Trading income (loss)	(3.84%)	(2.00%)	(8.08%)	(6.48%)
Expenses:
Expenses, less incentive fees	(1.89%)	(2.06%)	(5.53%)	(5.34%)
Incentive fees	0.00%	(0.10%)	0.00%	(0.07%)
Total expenses	(1.89%)	(2.16%)	(5.53%)	(5.41%)