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Condensed Schedule of Investments (USD $)
Sep. 30, 2011
Dec. 31, 2010
Investment Holdings [Line Items]  
Futures contracts purchased, Fair value$ 34,608$ 391,803
Futures contracts purchased, Partners capital percentage0.05%0.61%
Futures contracts sold, fair value251,240(62,098)
Futures contracts sold, partners capital percentage(0.39%)(0.10%)
Total unrealized appreciation on open forward contracts177,57599,712
Total unrealized appreciation on open forward contracts, Partners capital percentage0.27%0.15%
Investment in JWH Master57,680,98356,636,675
Investment in JWH Master, Partners capital percentage88.85%87.54%
Net fair value58,144,40657,066,092
Net fair value, Partners capital percentage89.56%88.20%
Currencies [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts1526
Futures contracts purchased, Fair value7,738121,719
Futures contracts purchased, Partners capital percentage0.01%0.19%
Futures contracts sold, number of contracts286
Futures contracts sold, fair value49,200(13,875)
Futures contracts sold, partners capital percentage0.08%(0.02%)
Energy [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts014
Futures contracts purchased, Fair value024,947
Futures contracts purchased, Partners capital percentage0.00%0.04%
Futures contracts sold, number of contracts4110
Futures contracts sold, fair value110,010(12,500)
Futures contracts sold, partners capital percentage0.17%(0.02%)
Grains [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts440
Futures contracts purchased, Fair value(15,500)142,491
Futures contracts purchased, Partners capital percentage(0.02%)0.22%
Futures contracts sold, number of contracts13 
Futures contracts sold, fair value41,292 
Futures contracts sold, partners capital percentage0.06% 
Indices [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts 39
Futures contracts purchased, Fair value (1,191)
Futures contracts purchased, Partners capital percentage 0.00%[1]
Futures contracts sold, number of contracts33 
Futures contracts sold, fair value(26,887) 
Futures contracts sold, partners capital percentage(0.04%) 
Interest Rates US [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts58 
Futures contracts purchased, Fair value68,131 
Futures contracts purchased, Partners capital percentage0.10% 
Futures contracts sold, number of contracts 13
Futures contracts sold, fair value (4,644)
Futures contracts sold, partners capital percentage (0.01%)
Interest Rates Non-US [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts44 
Futures contracts purchased, Fair value(30,351) 
Futures contracts purchased, Partners capital percentage(0.05%) 
Futures contracts sold, number of contracts 25
Futures contracts sold, fair value (31,079)
Futures contracts sold, partners capital percentage (0.05%)
Livestock [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts58
Futures contracts purchased, Fair value3,70011,920
Futures contracts purchased, Partners capital percentage0.01%0.02%
Metals [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts46
Futures contracts purchased, Fair value2,98056,575
Futures contracts purchased, Partners capital percentage0.00%[1]0.09%
Futures contracts sold, number of contracts2 
Futures contracts sold, fair value48,175 
Futures contracts sold, partners capital percentage0.07% 
Unrealized appreciation on open forward contracts, Number of contracts1411
Total unrealized appreciation on open forward contracts177,57599,712
Total unrealized appreciation on open forward contracts, Partners capital percentage0.27%0.15%
Softs [Member]
  
Investment Holdings [Line Items]  
Futures contracts purchased, Number of contracts127
Futures contracts purchased, Fair value(2,090)35,342
Futures contracts purchased, Partners capital percentage0.00%[1]0.05%
Futures contracts sold, number of contracts9 
Futures contracts sold, fair value$ 29,450 
Futures contracts sold, partners capital percentage0.05% 
[1]Due to rounding.