Statements of Financial Condition - USD ($)		Dec. 31, 2018	Dec. 31, 2017
Assets:
Investment in the Funds(1), at fair value (Note 6)	[1]	$ 606,579,513	$ 656,495,374
Redemptions receivable from the Funds		15,961,188	12,837,759
Equity in trading account:
Unrestricted cash (Note 3c)		727,149	100,615,185
Restricted cash (Note 3c)			42,619,216
Net unrealized appreciation on open contracts		29,057	5,877,334
Total equity in trading account		756,206	149,111,735
Cash at bank (Note 1)			436
Interest receivable (Note 3c)			139,020
Total assets		623,296,907	818,584,324
Accrued expenses:
Ongoing selling agent fees (Notes 3d and 3e)		1,777,733	2,622,825
Management fees (Note 3b)		512,011	699,501
General Partner fees (Note 3a)		388,049	509,718
Professional fees		371,405	412,503
Subscriptions payable to the Funds		261,448
Redemptions payable to Limited Partners (Note 7)		13,927,786	15,806,850
Total liabilities		17,238,432	20,051,397
Partners' Capital (Notes 1 and 7):
Total partners' capital (net asset value)		606,058,475	798,532,927
Total liabilities and partners' capital		623,296,907	818,584,324
Class Z Redeemable Units [Member]
Partners' Capital (Notes 1 and 7):
General Partner		6,716,925	9,602,692
Limited Partners		4,310,125	3,392,462
Total partners' capital (net asset value)		$ 11,027,050	$ 12,995,154
Net asset value per Redeemable Unit:
Net asset value per Redeemable Unit		$ 1,034.06	$ 1,122.81
Class A Redeemable Units [Member]
Partners' Capital (Notes 1 and 7):
Limited Partners		$ 595,031,425	$ 785,537,773
Total partners' capital (net asset value)		$ 595,031,425	$ 785,537,773
Net asset value per Redeemable Unit:
Net asset value per Redeemable Unit		$ 2,608.11	$ 2,887.46
Futures Contracts [Member]
Equity in trading account:
Net unrealized appreciation on open contracts			$ 5,004,060
Forward Contracts [Member]
Equity in trading account:
Net unrealized appreciation on open contracts		$ 29,057	$ 873,274

[1] Defined in Note 1.