Financial Highlights (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Class 0 Units [Member]
Per unit operating performance [Abstract]
Net asset value per unit, beginning balance (in dollars per units)	$ 114.88	$ 123.17
Net (loss) income [Abstract]
Net investment loss (in dollars per unit)	$ (3.32)	$ (4.88)
Net gain (loss) on investments (in dollars per unit)	$ 16.16	$ (3.41)
Net (loss) income (in dollars per unit)	$ 12.84	$ (8.29)
Net asset value per unit, ending balance (in dollars per unit)	$ 127.72	$ 114.88
Ratios to average members' capital and total return [Abstract]
Total return before Incentive Allocation (in hundredths)	11.18%	(6.73%)
Incentive Allocation (in hundredths)	0.00%	0.00%
Total return after Incentive Allocation (in hundredths)	11.18%	(6.73%)
Net investment loss before Incentive Allocation (in hundredths)	(2.74%)	(3.96%)
Incentive Allocation (in hundredths)	0.00%	0.00%
Net investment loss after Incentive Allocation (in hundredths)	(2.74%)	(3.96%)
Total expenses before Incentive Allocation (in hundredths)	2.95%	5.13%
Incentive Allocation (in hundredths)	0.00%	0.00%
Total expenses after Incentive Allocation (in hundredths)	2.95%	5.13%
Class 2 Units [Member]
Per unit operating performance [Abstract]
Net asset value per unit, beginning balance (in dollars per units)	$ 90.29	$ 98.77
Net (loss) income [Abstract]
Net investment loss (in dollars per unit)	$ (4.47)	$ (5.84)
Net gain (loss) on investments (in dollars per unit)	$ 12.59	$ (2.64)
Net (loss) income (in dollars per unit)	$ 8.12	$ (8.48)
Net asset value per unit, ending balance (in dollars per unit)	$ 98.41	$ 90.29
Ratios to average members' capital and total return [Abstract]
Total return before Incentive Allocation (in hundredths)	8.99%	(8.59%)
Incentive Allocation (in hundredths)	0.00%	0.00%
Total return after Incentive Allocation (in hundredths)	8.99%	(8.59%)
Net investment loss before Incentive Allocation (in hundredths)	(4.75%)	(5.91%)
Incentive Allocation (in hundredths)	0.00%	0.00%
Net investment loss after Incentive Allocation (in hundredths)	(4.75%)	(5.91%)
Total expenses before Incentive Allocation (in hundredths)	4.95%	7.18%
Incentive Allocation (in hundredths)	0.00%	0.00%
Total expenses after Incentive Allocation (in hundredths)	4.95%	7.18%