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Statements of Changes in Partners' Capital - USD ($)
Total
General Partner [Member]
Limited Partners [Member]
Beginning Balance at Dec. 31, 2013 $ 574,277,054 $ 0 $ 574,277,054
Addition of partnership shares 5,187,835,835 0 5,187,835,835
Redemption of partnership shares (3,995,159,782) 0 (3,995,159,782)
Net income (loss) (489,273,234) 0 (489,273,234)
Ending Balance at Dec. 31, 2014 $ 1,277,679,873 0 1,277,679,873
Net asset value, beginning of year at Dec. 31, 2013 $ 35.23    
Net asset value, end of year at Dec. 31, 2014 $ 20.15    
Addition of partnership shares $ 9,173,312,546 0 9,173,312,546
Redemption of partnership shares (6,040,509,746) 0 (6,040,509,746)
Net income (loss) (1,288,412,920) 0 (1,288,412,920)
Ending Balance at Dec. 31, 2015 $ 3,122,069,753 0 3,122,069,753
Net asset value, end of year at Dec. 31, 2015 $ 11.02    
Addition of partnership shares $ 4,450,820,824 0 4,450,820,824
Redemption of partnership shares (5,137,486,718) 0 (5,137,486,718)
Net income (loss) 666,552,810 0 666,552,810
Ending Balance at Dec. 31, 2016 $ 3,101,956,669 $ 0 $ 3,101,956,669
Net asset value, end of year at Dec. 31, 2016 $ 11.71