Financial Highlights (Details) - Schedule of Finanacial Highlights (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Capital Unit, Class A [Member]
Per share operating performance:
Net asset value of Trading units, beginning of period	$ 61.92	$ 72.55	$ 71.25	$ 76.92
Total Trading income (loss):
Trading gain (loss)	$ 4.10	$ (1.47)	$ (1.44)	$ (2.44)
Investment income	$ 0	$ 0.10	$ 0.03	$ 0.15
Expenses	$ (2.33)	$ (1.69)	$ (6.15)	$ (5.14)
Incentive fees	$ (0.53)	$ 0	$ (0.53)	$ 0
Trading income (loss)	$ 1.24	$ (3.06)	$ (8.09)	$ (7.43)
Net asset value of Trading units, end of period	$ 63.16	$ 69.49	$ 63.16	$ 69.49
Total return:
Total return before incentive fees	2.86%	(4.22%)	(10.58%)	(9.66%)
Less incentive fee allocations	(0.86%)	0.00%	(0.77%)	0.00%
Total return	2.00%	(4.22%)	(11.35%)	(9.66%)
Ratios to average net assets:
Trading income (loss)	1.86%	(4.42%)	(14.49%)	(9.98%)
Expenses:
Expenses, less incentive fees	(3.88%)	(2.44%)	(9.81%)	(7.06%)
Incentive fees	(0.86%)	0.00%	(0.77%)	0.00%
Total expenses	(4.74%)	(2.44%)	(10.58%)	(7.06%)
Capital Unit, Class B [Member]
Per share operating performance:
Net asset value of Trading units, beginning of period	$ 69.13	$ 79.38	$ 78.74	$ 83.34
Total Trading income (loss):
Trading gain (loss)	$ 4.60	$ (1.60)	$ (1.51)	$ (2.68)
Investment income	$ 0	$ 0.10	$ 0.04	$ 0.17
Expenses	$ (2.26)	$ (1.46)	$ (5.80)	$ (4.41)
Incentive fees	$ (0.60)	$ 0	$ (0.60)	$ 0
Trading income (loss)	$ 1.74	$ (2.96)	$ (7.87)	$ (6.92)
Net asset value of Trading units, end of period	$ 70.87	$ 76.42	$ 70.87	$ 76.42
Total return:
Total return before incentive fees	3.22%	(3.73%)	(9.48%)	(8.31%)
Less incentive fee allocations	(0.70%)	0.00%	(0.52%)	0.00%
Total return	2.52%	(3.73%)	(10.00%)	(8.31%)
Ratios to average net assets:
Trading income (loss)	1.54%	(3.84%)	(17.47%)	(8.08%)
Expenses:
Expenses, less incentive fees	(3.55%)	(1.89%)	(8.32%)	(5.53%)
Incentive fees	(0.70%)	0.00%	(0.52%)	0.00%
Total expenses	(4.25%)	(1.89%)	(8.84%)	(5.53%)