Financial Highlights (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Ratios as a percentage of average net assets:
Expenses prior to incentive fees (as a percent)	6.26%	6.39%	6.28%	6.38%
Incentive fees (as a percent)	0.00%	0.58%	0.06%	0.81%
Total expenses (as a percent)	6.26%	6.97%	6.34%	7.19%
Net investment loss (as a percent)	(6.06%)	(6.15%)	(6.07%)	(6.13%)
Class A Units
Financial Highlights
Total return (as a percent)	(4.91%)	1.00%	(5.13%)	(0.44%)
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 1,213.59	$ 1,277.32	$ 1,216.37	$ 1,295.84
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (40.68)	$ 40.96	$ (23.72)	$ 45.64
Expenses net of interest income (in dollars per unit)	$ (18.92)	$ (28.14)	$ (38.66)	$ (51.34)
Total income (loss) from operations (in dollars per unit)	$ (59.60)	$ 12.82	$ (62.38)	$ (5.70)
Net asset value per unit at end of period (in dollars per unit)	$ 1,153.99	$ 1,290.14	$ 1,153.99	$ 1,290.14
Class B Units
Financial Highlights
Total return (as a percent)	(5.07%)	0.85%	(5.43%)	(0.76%)
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 1,021.07	$ 1,081.52	$ 1,024.97	$ 1,099.04
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (34.35)	$ 34.63	$ (20.13)	$ 38.69
Expenses net of interest income (in dollars per unit)	$ (17.40)	$ (25.47)	$ (35.52)	$ (47.05)
Total income (loss) from operations (in dollars per unit)	$ (51.75)	$ 9.16	$ (55.65)	$ (8.36)
Net asset value per unit at end of period (in dollars per unit)	$ 969.32	$ 1,090.68	$ 969.32	$ 1,090.68
Legacy 1 Class Units
Financial Highlights
Total return (as a percent)	(4.36%)	1.57%	(4.05%)	0.69%
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 878.96	$ 904.32	$ 876.10	$ 912.23
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (29.88)	$ 28.83	$ (17.78)	$ 32.05
Expenses net of interest income (in dollars per unit)	$ (8.45)	$ (14.60)	$ (17.69)	$ (25.73)
Total income (loss) from operations (in dollars per unit)	$ (38.33)	$ 14.23	$ (35.47)	$ 6.32
Net asset value per unit at end of period (in dollars per unit)	$ 840.63	$ 918.55	$ 840.63	$ 918.55
Legacy 2 Class Units
Financial Highlights
Total return (as a percent)	(4.42%)	1.44%	(4.16%)	0.50%
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 866.97	$ 894.70	$ 864.60	$ 903.06
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (29.25)	$ 28.61	$ (17.18)	$ 31.87
Expenses net of interest income (in dollars per unit)	$ (9.07)	$ (15.72)	$ (18.77)	$ (27.34)
Total income (loss) from operations (in dollars per unit)	$ (38.32)	$ 12.89	$ (35.95)	$ 4.53
Net asset value per unit at end of period (in dollars per unit)	$ 828.65	$ 907.59	$ 828.65	$ 907.59
Global 1 Class Units
Financial Highlights
Total return (as a percent)	(4.21%)	1.72%	(3.75%)	1.07%
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 849.59	$ 868.77	$ 845.52	$ 874.34
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (28.73)	$ 28.25	$ (16.96)	$ 31.57
Expenses net of interest income (in dollars per unit)	$ (7.01)	$ (13.30)	$ (14.71)	$ (22.19)
Total income (loss) from operations (in dollars per unit)	$ (35.74)	$ 14.95	$ (31.67)	$ 9.38
Net asset value per unit at end of period (in dollars per unit)	$ 813.85	$ 883.72	$ 813.85	$ 883.72
Global 2 Class Units
Financial Highlights
Total return (as a percent)	(4.26%)	1.65%	(3.86%)	0.93%
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 838.99	$ 860.14	$ 835.49	$ 866.22
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (28.26)	$ 27.52	$ (16.55)	$ 30.91
Expenses net of interest income (in dollars per unit)	$ (7.52)	$ (13.35)	$ (15.73)	$ (22.82)
Total income (loss) from operations (in dollars per unit)	$ (35.78)	$ 14.17	$ (32.28)	$ 8.09
Net asset value per unit at end of period (in dollars per unit)	$ 803.21	$ 874.31	$ 803.21	$ 874.31
Global 3 Class Units
Financial Highlights
Total return (as a percent)	(4.69%)	1.24%	(4.70%)	0.09%
Per Unit Performance (for unit outstanding throughout the entire period):
Net asset value per unit at beginning of period (in dollars per unit)	$ 779.82	$ 813.23	$ 779.90	$ 822.60
Income (loss) from operations:
Net realized and change in unrealized gain (loss) from trading (in dollars per unit)	$ (26.15)	$ 25.96	$ (15.23)	$ 29.26
Expenses net of interest income (in dollars per unit)	$ (10.40)	$ (15.85)	$ (21.40)	$ (28.52)
Total income (loss) from operations (in dollars per unit)	$ (36.55)	$ 10.11	$ (36.63)	$ 0.74
Net asset value per unit at end of period (in dollars per unit)	$ 743.27	$ 823.34	$ 743.27	$ 823.34