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Condensed Statement of Changes in Partners' Capital - USD ($)
Total
General Partner [Member]
Limited Partners [Member]
Net income (loss) $ (276,690,243)    
Net asset value, beginning of year at Dec. 31, 2014 $ 20.15    
Net asset value, end of year at Mar. 31, 2015 $ 16.87    
Beginning Balance at Dec. 31, 2015 $ 3,122,069,753 $ 0 $ 3,122,069,753
Addition of 177,000,000 partnership shares 1,538,268,122 0 1,538,268,122
Redemption of 99,700,000 partnership shares (968,488,152) 0 (968,488,152)
Net income (loss) (178,972,992) 0 (178,972,992)
Ending Balance at Mar. 31, 2016 $ 3,512,876,731 $ 0 $ 3,512,876,731
Net asset value, beginning of year at Dec. 31, 2015 $ 11.02    
Net asset value, end of year at Mar. 31, 2016 $ 9.74