Document_and_Entity_Informatio
| Document and Entity Information | 9 Months Ended |
| Sep. 30, 2013 | |
| Document And Entity Information [Abstract] | ' |
| Document Type | '10-Q |
| Amendment Flag | 'false |
| Document Period End Date | 30-Sep-13 |
| Document Fiscal Year Focus | '2013 |
| Document Fiscal Period Focus | 'Q3 |
| Entity Registrant Name | 'PROSHARES TRUST II |
| Entity Central Index Key | '0001415311 |
| Current Fiscal Year End Date | '--12-31 |
| Entity Filer Category | 'Large Accelerated Filer |
| Entity Common Stock, Shares Outstanding | 107,968,272 |
Statement_of_Financial_Conditi
| Statement of Financial Condition (USD $) | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Dec. 31, 2012 | |
| ProShares UltraShort DJ-UBS Commodity [Member] | ProShares UltraShort DJ-UBS Commodity [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Silver [Member] | ProShares UltraShort Silver [Member] | ProShares Short Euro [Member] | ProShares Short Euro [Member] | ProShares UltraShort Australian Dollar [Member] | ProShares UltraShort Australian Dollar [Member] | ProShares UltraShort Euro [Member] | ProShares UltraShort Euro [Member] | ProShares UltraShort Yen [Member] | ProShares UltraShort Yen [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ProShares Ultra Gold [Member] | ProShares Ultra Gold [Member] | ProShares Ultra Silver [Member] | ProShares Ultra Silver [Member] | ProShares Ultra Australian Dollar [Member] | ProShares Ultra Australian Dollar [Member] | ProShares Ultra Euro [Member] | ProShares Ultra Euro [Member] | ProShares Ultra Yen [Member] | ProShares Ultra Yen [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ProShares Trust II [Member] | ProShares Trust II [Member] | ||
| Assets | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Cash | $352,169 | $296,119 | $3,166,122 | $658,676 | $262,113 | $310,060 | $273,407 | $175,194 | $428,378 | $344,378 | $501,333 | $302,359 | $972,741 | $361,157 | $241,121 | $276,372 | $475,539 | $363,826 | $124,557 | $167,546 | $685,206 | $2,198,932 | $3,961,056 | $3,385,764 | $191,886 | $342,345 | $635,419 | $890,051 | $277,991 | $426,634 | $46,708 | $240,086 | $29,162 | $138,033 | $2,371,337 | $2,989,958 | $1,626,981 | $2,063,715 | $3,012,817 | $1,790,825 | $254,640 | $2,236,726 | $19,890,683 | $19,959,356 | |
| Segregated cash balances with brokers for futures contracts | ' | ' | 17,043,290 | 4,401,374 | 2,081,310 | 1,795,030 | 17,600 | 14,850 | 24,750 | 24,200 | 118,250 | 63,250 | 1,044,747 | 144,540 | ' | ' | ' | ' | ' | ' | 4,929,430 | 23,356,627 | 12,222,210 | 10,264,090 | 17,600 | 14,850 | 24,750 | 24,200 | 148,962 | 158,400 | ' | ' | ' | ' | 29,359,000 | 34,109,998 | 14,112,900 | 7,830,000 | 100,757,800 | 38,727,007 | 16,724,300 | 20,731,497 | 198,626,899 | 141,659,913 | |
| Short-term U.S. government and agency obligations (Note 3) | 3,196,967 | 2,803,904 | 419,011,935 | [1] | 87,046,389 | 13,658,585 | 10,042,731 | 137,129,907 | 88,575,398 | 106,048,955 | 86,206,701 | 6,666,790 | 3,409,904 | 22,016,137 | 3,302,907 | 482,820,998 | 553,430,562 | 475,704,411 | 362,743,231 | 4,107,868 | 6,240,951 | 136,394,297 | 437,662,650 | 75,238,008 | 64,313,224 | 189,669,408 | 350,624,904 | 633,827,603 | 891,057,386 | 2,999,904 | 3,570,894 | 2,290,933 | 4,546,944 | 3,118,885 | 4,587,918 | 130,224,349 | 144,060,921 | 77,780,701 | 79,930,866 | 197,516,820 | 97,440,843 | 62,307,511 | 53,686,352 | 3,181,730,972 | 3,335,285,580 |
| Unrealized appreciation on swap agreements | 200,128 | 148,502 | 34,688,207 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 33,333,620 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 301,351 | ' | ' | 34,888,335 | 33,783,473 | |
| Unrealized appreciation on forward agreements | ' | ' | ' | ' | ' | ' | 7,782,450 | 3,729,856 | 9,083,114 | 19,307,685 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 16,865,564 | 23,037,541 | |
| Unrealized appreciation on foreign currency forward contracts | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1,643,765 | 251,047 | 793,507 | 38,346,817 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 198,744 | 89,473 | 78,715 | 13,523 | ' | ' | ' | ' | ' | ' | ' | ' | 2,714,731 | 38,700,860 | |
| Receivable from capital shares sold | ' | ' | ' | 4,031,477 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 7,613,633 | ' | ' | 6,943,327 | ' | 4,838,992 | ' | ' | ' | ' | 2,148,957 | ' | ' | ' | ' | ' | ' | 7,317,344 | 2,518,068 | 1,691,288 | ' | ' | 18,127,289 | 21,007,069 | 13,232,678 | 41,798,020 | 47,672,102 | |
| Receivable on open futures contracts | ' | ' | 2,100,651 | ' | 45,312 | 632,777 | 2,440 | ' | 580 | ' | ' | 6,612 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 3,430,415 | ' | ' | ' | 3,980 | ' | 2,520 | 5,180 | 12,000 | ' | ' | ' | ' | 7,590,541 | ' | 1,619,391 | ' | 30,450,046 | ' | ' | 5,524,721 | 41,814,141 | 9,613,025 | |
| Offering costs (Note 5) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 19,770 | ' | 22,129 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 22,128 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 257,927 | |
| Limitation by Sponsor | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 2,145 | ' | 2,216 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1,012 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 5,373 | |
| Total assets | 3,749,264 | 3,248,525 | 476,010,205 | 96,137,916 | 16,047,320 | 12,780,598 | 145,205,804 | 92,495,298 | 115,585,777 | 105,882,964 | 7,286,373 | 3,804,040 | 24,033,625 | 3,832,949 | 484,705,884 | 553,957,981 | 476,973,457 | 409,067,507 | 4,232,425 | 6,408,497 | 148,952,260 | 499,982,244 | 96,260,266 | 77,963,078 | 189,878,894 | 350,986,079 | 634,487,772 | 894,123,114 | 3,432,037 | 4,191,068 | 2,536,385 | 4,876,503 | 3,226,762 | 4,739,474 | 176,862,571 | 183,678,945 | 96,831,261 | 89,824,581 | 331,737,483 | 156,387,315 | 100,293,520 | 95,411,974 | 3,538,329,345 | 3,649,975,150 | |
| Liabilities | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Payable for capital shares redeemed | ' | ' | 33,181,570 | ' | ' | ' | ' | ' | ' | 5,138,116 | ' | ' | ' | ' | ' | 13,282,209 | ' | ' | ' | ' | ' | 16,071,243 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 9,658,307 | 14,374,851 | ' | 50,571,549 | 45,326,425 | 35,907,787 | ' | 12,699,384 | 88,166,302 | 148,045,139 | |
| Payable on open futures contracts | ' | ' | ' | 979,336 | ' | ' | ' | 3,980 | ' | 2,520 | 3,225 | ' | 36,330 | 10,950 | ' | ' | ' | ' | ' | ' | 772,970 | ' | 1,999,143 | 4,891,783 | 2,440 | ' | 1,780 | ' | ' | ' | ' | ' | ' | ' | ' | 31,540,181 | ' | 1,890,675 | ' | 35,666,735 | 5,707,549 | ' | 8,523,437 | 74,986,160 | |
| Management fee payable | 2,836 | 2,560 | 367,607 | 70,254 | 12,293 | 12,258 | 92,394 | 74,576 | 84,701 | 85,625 | 5,758 | ' | 19,068 | ' | 370,009 | 499,127 | 378,269 | 271,235 | 3,225 | 5,018 | 109,485 | 402,037 | 71,955 | 51,925 | 140,211 | 279,269 | 473,214 | 657,008 | 2,639 | ' | 2,654 | 3,873 | 2,480 | 3,660 | 118,636 | 106,449 | 66,110 | 59,365 | 210,425 | 96,661 | 69,893 | 48,957 | 2,603,862 | 2,729,857 | |
| Payable for offering costs | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 41,000 | ' | 41,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 41,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 316,900 | |
| Unrealized depreciation on swap agreements | ' | ' | ' | 5,607,060 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 237,372 | 306,268 | 10,995,019 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 11,232,391 | 5,913,328 | |
| Unrealized depreciation on forward agreements | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 17,189,960 | 15,652,058 | 80,087,349 | 145,740,706 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 97,277,309 | 161,392,764 | |
| Unrealized depreciation on foreign currency forward contracts | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 27,575,831 | 13,398,619 | 13,313,050 | 232,642 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 8,271 | 2,314 | 3,220 | 507,819 | ' | ' | ' | ' | ' | ' | ' | ' | 40,900,372 | 14,141,394 | |
| Total liabilities | 2,836 | 2,560 | 33,549,177 | 6,656,650 | 12,293 | 12,258 | 92,394 | 78,556 | 84,701 | 5,226,261 | 8,983 | 41,000 | 55,398 | 51,950 | 27,945,840 | 27,179,955 | 13,691,319 | 503,877 | 240,597 | 311,286 | 11,877,474 | 16,473,280 | 2,071,098 | 4,943,708 | 17,332,611 | 15,931,327 | 80,562,343 | 146,397,714 | 2,639 | 41,000 | 10,925 | 6,187 | 5,700 | 511,479 | 9,776,943 | 46,021,481 | 66,110 | 52,521,589 | 45,536,850 | 71,671,183 | 5,777,442 | 12,748,341 | 248,703,673 | 407,525,542 | |
| Shareholders' equity | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Shareholders' equity | 3,746,428 | 3,245,965 | 442,461,028 | 89,481,266 | 16,035,027 | 12,768,340 | 145,113,410 | 92,416,742 | 115,501,076 | 100,656,703 | 7,277,390 | 3,763,040 | 23,978,227 | 3,780,999 | 456,760,044 | 526,778,026 | 463,282,138 | 408,563,630 | 3,991,828 | 6,097,211 | 137,074,786 | 483,508,964 | 94,189,168 | 73,019,370 | 172,546,283 | 335,054,752 | 553,925,429 | 747,725,400 | 3,429,398 | 4,150,068 | 2,525,460 | 4,870,316 | 3,221,062 | 4,227,995 | 167,085,628 | 137,657,464 | 96,765,151 | 37,302,992 | 286,200,633 | 84,716,132 | 94,516,078 | 82,663,633 | 3,289,625,672 | 3,242,449,608 | |
| Total liabilities and shareholders' equity | $3,749,264 | $3,248,525 | $476,010,205 | $96,137,916 | $16,047,320 | $12,780,598 | $145,205,804 | $92,495,298 | $115,585,777 | $105,882,964 | $7,286,373 | $3,804,040 | $24,033,625 | $3,832,949 | $484,705,884 | $553,957,981 | $476,973,457 | $409,067,507 | $4,232,425 | $6,408,497 | $148,952,260 | $499,982,244 | $96,260,266 | $77,963,078 | $189,878,894 | $350,986,079 | $634,487,772 | $894,123,114 | $3,432,037 | $4,191,068 | $2,536,385 | $4,876,503 | $3,226,762 | $4,739,474 | $176,862,571 | $183,678,945 | $96,831,261 | $89,824,581 | $331,737,483 | $156,387,315 | $100,293,520 | $95,411,974 | $3,538,329,345 | $3,649,975,150 | |
| Shares outstanding | 59,997 | 59,997 | 14,619,944 | 2,219,944 | 174,952 | 125,008 | 1,646,978 | 1,446,978 | 1,508,489 | 1,958,489 | 200,005 | 100,005 | 550,005 | 100,005 | 25,750,014 | 27,700,014 | 7,449,294 | 8,049,294 | 200,014 | 250,014 | 3,949,170 | 16,449,170 | 2,919,941 | 1,869,941 | 3,400,014 | 4,000,014 | 27,600,028 | 17,400,028 | 100,005 | 100,005 | 100,014 | 200,014 | 150,014 | 150,014 | 4,224,812 | 1,640,001 | 4,175,005 | 1,075,005 | 8,289,557 | 420,808 | 900,020 | 1,250,020 | 107,968,272 | 86,564,783 | |
| Net asset value per share | $62.44 | $54.10 | $30.26 | $40.31 | $91.65 | $102.14 | $88.11 | $63.87 | $76.57 | $51.40 | $36.39 | $37.63 | $43.60 | $37.81 | $17.74 | $19.02 | $62.19 | $50.76 | $19.96 | $24.39 | $34.71 | $29.39 | $32.26 | $39.05 | $50.75 | $83.76 | $20.07 | $42.97 | $34.29 | $41.50 | $25.25 | $24.35 | $21.47 | $28.18 | $39.55 | $83.94 | $23.18 | $34.70 | $34.53 | $201.32 | $105.02 | $66.13 | ' | ' | |
| Market value per share | $57.37 | $51.64 | $30.25 | $40.44 | $91.86 | $101.64 | $87.88 | $62.60 | $76.49 | $50.07 | $36.41 | $37.64 | $43.54 | $37.74 | $17.75 | $19.01 | $62.23 | $50.77 | $19.92 | $23.93 | $34.73 | $29.32 | $32.18 | $39.24 | $50.86 | $85.34 | $20.05 | $44.10 | $34.35 | $41.45 | $25.30 | $24.32 | $21.70 | $28.28 | $39.45 | $85.05 | $23.02 | $34.22 | $34.34 | $209 | $105.14 | $65.45 | ' | ' | |
| [1] | All or partial amount pledged as collateral for swap agreements. | ||||||||||||||||||||||||||||||||||||||||||||
Statement_of_Financial_Conditi1
| Statement of Financial Condition (Parenthetical) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | $3,196,929 | $2,803,598 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 418,999,833 | 87,042,320 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 13,658,395 | 10,042,198 |
| ProShares UltraShort Gold [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 137,129,482 | 88,573,928 |
| ProShares UltraShort Silver [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 106,046,820 | 86,199,868 |
| ProShares Short Euro [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 6,666,802 | 3,409,716 |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 22,015,646 | 3,302,725 |
| ProShares UltraShort Euro [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 482,813,582 | 553,417,216 |
| ProShares UltraShort Yen [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 475,703,032 | 362,731,936 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 4,107,812 | 6,240,818 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 136,392,465 | 437,644,628 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 75,236,739 | 64,312,441 |
| ProShares Ultra Gold [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 189,665,568 | 350,608,755 |
| ProShares Ultra Silver [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 633,826,597 | 891,006,493 |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 2,999,882 | 3,570,687 |
| ProShares Ultra Euro [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 2,290,867 | 4,546,872 |
| ProShares Ultra Yen [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 3,118,815 | 4,587,701 |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 130,222,456 | 144,057,296 |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 77,779,005 | 79,927,870 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 197,515,581 | 97,445,279 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | 62,305,766 | 53,683,800 |
| ProShares Trust II [Member] | ' | ' |
| Short-term U.S. government and agency obligations, cost | $3,181,692,074 | $3,335,156,145 |
Statements_of_Operations
| Statements of Operations (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||
| Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | ||
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| Investment Income | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Interest | $416 | $568 | $1,651 | $2,227 | $34,116 | $19,218 | $82,626 | $49,995 | $1,267 | $1,854 | $7,217 | $4,883 | $13,065 | $21,407 | $48,373 | $52,562 | $8,580 | $25,338 | $47,626 | $69,765 | $338 | $641 | $641 | $1,363 | $586 | [1] | $1,790 | $3,399 | $39,032 | $160,447 | $179,135 | $359,466 | $40,839 | $41,475 | $171,429 | $104,677 | $395 | $1,472 | $1,809 | $3,401 | $13,828 | $63,544 | $115,731 | $126,796 | $5,794 | $9,896 | $22,420 | $18,894 | $18,099 | $62,437 | $118,967 | $151,337 | $51,513 | $136,002 | $313,406 | $313,266 | $618 | $242 | $1,312 | $371 | $975 | $1,468 | $2,550 | $295 | $1,009 | $1,538 | $2,253 | $10,711 | $21,142 | $54,250 | $47,219 | $6,721 | $12,846 | $20,472 | $31,096 | $10,797 | $22,293 | $46,863 | $40,074 | $6,018 | $4,522 | $22,651 | $8,717 | $264,227 | $608,290 | $1,263,706 | $1,391,023 |
| Expenses | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Management fee | 8,866 | 7,390 | 24,901 | 43,386 | 1,047,511 | 252,685 | 1,830,070 | 871,751 | 40,159 | 14,762 | 137,353 | 39,735 | 296,972 | 277,898 | 892,226 | 954,699 | 219,042 | 315,479 | 759,657 | 1,219,073 | 16,080 | ' | ' | 16,573 | ' | 47,611 | 47,611 | 1,169,113 | 2,052,823 | 3,553,447 | 6,345,979 | 1,205,676 | 537,172 | 3,450,237 | 1,699,389 | 9,770 | 21,020 | 32,386 | 62,966 | 391,381 | 914,474 | 1,902,343 | 2,267,600 | 188,763 | 137,754 | 458,553 | 260,956 | 409,677 | 825,270 | 1,692,282 | 2,546,445 | 1,317,246 | 1,795,410 | 4,410,160 | 5,416,759 | ' | 6,535 | 6,535 | 8,494 | 13,183 | 28,458 | 52,001 | 7,652 | 12,368 | 26,182 | 36,387 | 365,398 | 315,055 | 1,171,508 | 788,072 | 172,413 | 202,688 | 410,433 | 634,119 | 667,541 | 586,150 | 1,944,995 | 1,216,603 | 212,926 | 37,125 | 535,989 | 73,103 | 7,808,826 | 8,318,706 | 23,331,899 | 24,529,023 | |
| Brokerage commissions | ' | ' | ' | ' | 23,477 | 8,254 | 49,006 | 24,596 | 9,143 | 10,986 | 36,055 | 52,462 | 8 | 8 | 32 | 33 | 8 | 8 | 32 | 33 | 287 | 134 | 197 | 517 | 605 | [1] | 4,057 | 7,836 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 5,957 | 17,756 | 44,268 | 51,677 | 31,168 | 31,584 | 87,565 | 90,703 | 8 | 8 | 32 | 33 | 8 | 9 | 28 | 38 | 556 | 394 | 1,171 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 602,808 | 462,005 | 1,824,624 | 1,074,133 | 132,363 | 71,818 | 335,552 | 139,690 | 809,686 | 603,731 | 2,386,718 | 1,434,756 |
| Offering costs | ' | ' | ' | ' | ' | ' | ' | ' | ' | 17,694 | ' | 63,342 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 10,334 | 10,896 | 45,511 | 8,537 | [1] | 2,926 | 47,870 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 17,694 | ' | 63,342 | ' | ' | ' | ' | ' | ' | ' | ' | 8,537 | 2,926 | 47,870 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1,090 | ' | ' | ' | 682 | ' | 19,313 | ' | 69,341 | ' | 19,314 | ' | 69,342 | 5,852 | 101,423 | 141,251 | 295,109 |
| Limitation by Sponsor | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -816 | -964 | -28,232 | -1,012 | [1] | ' | -1,259 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -522 | -1,572 | -27,636 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -1,572 | -2,350 | -57,127 | -2,498 |
| Reduction in Limitation by Sponsor | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 6,817 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 6,817 | ' | ' | ' | |
| Total expenses | 8,866 | 7,390 | 24,901 | 43,386 | 1,070,988 | 260,939 | 1,879,076 | 896,347 | 49,302 | 43,442 | 173,408 | 155,539 | 296,980 | 277,906 | 892,258 | 954,732 | 219,050 | 315,487 | 759,689 | 1,219,106 | 16,367 | 9,652 | 10,129 | 34,369 | 8,130 | [1] | 61,411 | 102,058 | 1,169,113 | 2,052,823 | 3,553,447 | 6,345,979 | 1,205,676 | 537,172 | 3,450,237 | 1,699,389 | 9,770 | 21,020 | 32,386 | 62,966 | 397,338 | 932,230 | 1,946,611 | 2,319,277 | 219,931 | 187,032 | 546,118 | 415,001 | 409,685 | 825,278 | 1,692,314 | 2,546,478 | 1,317,254 | 1,795,419 | 4,410,188 | 5,416,797 | 8,571 | 8,283 | 27,940 | 8,494 | 13,183 | 28,458 | 52,001 | 7,652 | 12,368 | 26,182 | 36,387 | 365,398 | 315,055 | 1,171,508 | 789,162 | 172,413 | 202,688 | 410,433 | 634,801 | 1,270,349 | 1,067,468 | 3,769,619 | 2,360,077 | 345,289 | 128,257 | 871,541 | 282,135 | 8,629,609 | 9,021,510 | 25,802,741 | 26,256,390 |
| Net investment income (loss) | -8,450 | -6,822 | -23,250 | -41,159 | -1,036,872 | -241,721 | -1,796,450 | -846,352 | -48,035 | -41,588 | -166,191 | -150,656 | -283,915 | -256,499 | -843,885 | -902,170 | -210,470 | -290,149 | -712,063 | -1,149,341 | -16,029 | -9,011 | -9,488 | -33,006 | -7,544 | [1] | -59,621 | -98,659 | -1,130,081 | -1,892,376 | -3,374,312 | -5,986,513 | -1,164,837 | -495,697 | -3,278,808 | -1,594,712 | -9,375 | -19,548 | -30,577 | -59,565 | -383,510 | -868,686 | -1,830,880 | -2,192,481 | -214,137 | -177,136 | -523,698 | -396,107 | -391,586 | -762,841 | -1,573,347 | -2,395,141 | -1,265,741 | -1,659,417 | -4,096,782 | -5,103,531 | -7,953 | -8,041 | -26,628 | -8,123 | -12,208 | -26,990 | -49,451 | -7,357 | -11,359 | -24,644 | -34,134 | -354,687 | -293,913 | -1,117,258 | -741,943 | -165,692 | -189,842 | -389,961 | -603,705 | -1,259,552 | -1,045,175 | -3,722,756 | -2,320,003 | -339,271 | -123,735 | -848,890 | -273,418 | -8,365,382 | -8,413,220 | -24,539,035 | -24,865,367 |
| Net realized gain (loss) on | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Futures contracts | ' | ' | ' | ' | -25,209,929 | -11,352,523 | -28,442,320 | 9,297,036 | 2,862,705 | -4,766,026 | 254,565 | 1,537,148 | 30,380 | -1,600 | 95,800 | 38,100 | 3,700 | 8,100 | 129,440 | 61,500 | -39,024 | -102,555 | -104,555 | -114,962 | -123,485 | [1] | 389,254 | 2,294,351 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 14,935,152 | 39,863,006 | 58,472,792 | -3,106,383 | -14,491,916 | 20,880,016 | 410,025 | -5,782,759 | -30,400 | 1,600 | -95,940 | -37,880 | -3,850 | -8,250 | -129,994 | -66,550 | 99,030 | -123,128 | -863,033 | ' | ' | ' | ' | ' | ' | ' | ' | -58,627,489 | -85,611,502 | -102,880,094 | -137,705,726 | -6,929,719 | -19,925,729 | -19,676,804 | -45,669,199 | -197,375,157 | -282,640,076 | -297,848,329 | -461,102,812 | 37,631,293 | 10,269,196 | 58,706,439 | 14,345,508 | -246,978,128 | -333,410,798 | -329,688,064 | -628,321,027 |
| Swap agreements | 13,664 | -861,786 | 472,331 | 653,141 | -60,974,182 | -13,102,901 | -62,841,295 | 16,747,909 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -85,078 | 1,946,086 | -868,053 | -234,500 | 38,653,932 | 53,732,254 | 82,414,286 | 85,922 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -16,548,798 | -4,453,107 | -16,817,661 | ' | ' | ' | ' | -22,391,664 | 25,164,855 | 14,724,162 | 434,811 | |
| Forward agreements | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 5,990,767 | -10,988,696 | 39,666,864 | -9,316,144 | 5,999,781 | -30,594,433 | 86,693,880 | -27,269,372 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -5,880,490 | 23,187,603 | -124,238,804 | -27,034,257 | 28,403,922 | 159,551,951 | -509,769,205 | -51,676,872 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 34,513,980 | 141,156,425 | -507,647,265 | -115,296,645 | |
| Foreign currency forward contracts | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -8,625,860 | -14,572,815 | -19,722,590 | 106,381,285 | -5,693,424 | -4,756,665 | 139,331,278 | 5,696,143 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 41,105 | 55,097 | 12,734 | -811,701 | -20,255 | 90,137 | -1,694,827 | -131,047 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -14,298,434 | -19,184,246 | 117,926,595 | 111,134,680 | |
| Short-term U.S. government and agency obligations | 22 | ' | 24 | 62 | 3,458 | 1,654 | 11,757 | 3,424 | 418 | 185 | 1,419 | 27 | 2,788 | 383 | 3,993 | 1,226 | 4,502 | 911 | 7,599 | 869 | 15 | -1 | -1 | 162 | -2 | [1] | 156 | 317 | 2,718 | -442 | 7,137 | -877 | 1,031 | 205 | 5,849 | 897 | 11 | -7 | 41 | -7 | 2,220 | 1,157 | 11,070 | 3,970 | 1,729 | 451 | 5,506 | 1,705 | 3,048 | 1,030 | 11,545 | 1,664 | 5,757 | 167 | 28,868 | 3,218 | -1 | 7 | 22 | 9 | 2 | 18 | 45 | 19 | ' | 72 | 16 | 5,723 | -782 | 8,753 | 365 | 1,962 | 188 | 3,272 | -1,822 | 13,868 | 2,865 | 34,128 | 9,728 | 4,416 | 1,435 | 6,470 | 2,221 | 53,877 | 9,398 | 148,022 | 26,727 |
| Net realized gain (loss) | 13,686 | -861,786 | 472,355 | 653,203 | -86,180,653 | -24,453,770 | -91,271,858 | 26,048,369 | 2,863,123 | -4,765,841 | 255,984 | 1,537,175 | 6,023,935 | -10,989,913 | 39,766,657 | -9,276,818 | 6,007,983 | -30,585,422 | 86,830,919 | -27,207,003 | -39,009 | -102,556 | -104,556 | -114,800 | -123,487 | [1] | 389,410 | 2,294,668 | -8,623,142 | -14,573,257 | -19,715,453 | 106,380,408 | -5,692,393 | -4,756,460 | 139,337,127 | 5,697,040 | -85,067 | 1,946,079 | -868,012 | -234,507 | 53,591,304 | 93,596,417 | 140,898,148 | -3,016,491 | -14,490,187 | 20,880,467 | 415,531 | -5,781,054 | -5,907,842 | 23,190,233 | -124,323,199 | -27,070,473 | 28,405,829 | 159,543,868 | -509,870,331 | -51,740,204 | 99,029 | -123,121 | -863,011 | 41,114 | 55,099 | 12,752 | -811,656 | -20,236 | 90,137 | -1,694,755 | -131,031 | -58,621,766 | -85,612,284 | -102,871,341 | -137,705,361 | -6,927,757 | -19,925,541 | -19,673,532 | -45,671,021 | -197,361,289 | -299,186,009 | -302,267,308 | -477,910,745 | 37,635,709 | 10,270,631 | 58,712,909 | 14,347,729 | -249,100,369 | -186,264,366 | -704,536,550 | -632,021,454 |
| Change in net unrealized appreciation/depreciation on | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Futures contracts | ' | ' | ' | ' | 9,595,093 | 5,021,020 | 12,746,317 | 1,679,430 | -1,862,190 | 1,018,440 | 58,149 | -4,183,090 | -50,640 | -31,480 | -24,640 | -77,000 | -25,580 | -77,050 | -42,200 | -125,870 | -208,707 | 36,694 | -13,619 | -86,038 | 1,140 | [1] | -1,865,253 | -552,202 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -3,023,114 | -15,276,450 | -24,671,176 | -3,775,100 | 9,380,633 | -5,822,190 | 7,251,345 | 13,594,580 | 50,680 | 31,360 | 24,660 | 76,780 | 25,680 | 77,050 | 42,200 | 125,770 | -1,930 | 277,231 | 169,154 | ' | ' | ' | ' | ' | ' | ' | ' | 1,983,669 | 13,014,580 | 3,441,625 | -3,298,001 | -6,313,054 | -7,586,879 | 739,790 | -7,611,689 | 9,751,723 | 33,721,060 | 10,935,632 | -18,009,952 | -2,816,258 | -146,485 | -2,062,754 | 439,437 | 14,899,913 | 23,978,880 | 7,969,862 | -21,179,114 |
| Swap agreements | -212,120 | 206,641 | 51,626 | -684,284 | 35,068,228 | 5,012,876 | 40,295,267 | 2,763,277 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 233,903 | -418,834 | 68,896 | 974,662 | -15,181,493 | -17,443,924 | -44,328,639 | -3,473,334 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 5,869,689 | -301,351 | -1,826,122 | ' | ' | ' | ' | 19,908,518 | -6,773,552 | -4,214,201 | -2,245,801 | |
| Forward agreements | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -44,003,240 | -13,858,647 | 4,052,594 | -42,496,500 | -32,063,071 | -36,484,084 | -10,224,571 | -57,492,979 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 36,515,444 | 47,286,260 | -1,537,902 | 111,479,069 | 96,463,510 | 205,570,169 | 65,653,357 | 269,567,970 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 56,912,643 | 202,513,698 | 57,943,478 | 281,057,560 | |
| Foreign currency forward contracts | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -30,678,790 | -12,582,909 | -12,784,494 | -102,605,174 | -8,391,457 | -6,717,569 | -50,633,718 | 1,720,295 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 227,504 | 100,337 | 103,314 | 740,490 | 65,431 | 146,755 | 569,791 | -56,350 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -38,777,312 | -19,053,386 | -62,745,107 | -100,200,739 | |
| Short-term U.S. government and agency obligations | 91 | -71 | -268 | 235 | 11,054 | 1,235 | 8,033 | 6,556 | 648 | 259 | -343 | 723 | 982 | 2,461 | -1,045 | 8,985 | 3,530 | -270 | -4,698 | 8,702 | -93 | 18 | 18 | -200 | 17 | [1] | 535 | 309 | 17,665 | 744 | -5,930 | 50,098 | -44 | 1,760 | -9,916 | 9,826 | 40 | 278 | -77 | 586 | -157 | -123 | -16,190 | 19,991 | 2,201 | -319 | 486 | 1,575 | 6,673 | 5,738 | -12,309 | 17,402 | 4,593 | 7,110 | -49,887 | 33,736 | 27 | -67 | -185 | 90 | 87 | -6 | 540 | -55 | 65 | -147 | 306 | 7,646 | 1,910 | -1,732 | 5,216 | 3,772 | -1,753 | -1,300 | 6,800 | 5,260 | -1,578 | 5,675 | 1,763 | 3,113 | 91 | -807 | 515 | 67,477 | 17,686 | -90,537 | 173,617 |
| Change in net unrealized appreciation/depreciation | -212,029 | 206,570 | 51,358 | -684,049 | 44,674,375 | 10,035,131 | 53,049,617 | 4,449,263 | -1,861,542 | 1,018,699 | 57,806 | -4,182,367 | -44,052,898 | -13,887,666 | 4,026,909 | -42,564,515 | -32,085,121 | -36,561,404 | -10,271,469 | -57,610,147 | -208,800 | 36,712 | -13,601 | -86,238 | 1,157 | [1] | -1,864,718 | -551,893 | -30,661,125 | -12,582,165 | -12,790,424 | -102,555,076 | -8,391,501 | -6,715,809 | -50,643,634 | 1,730,121 | 233,943 | -418,556 | 68,819 | 975,248 | -18,204,764 | -32,720,497 | -69,016,005 | -7,228,443 | 9,382,834 | -5,822,509 | 7,251,831 | 13,596,155 | 36,572,797 | 47,323,358 | -1,525,551 | 111,573,251 | 96,493,783 | 205,654,329 | 65,645,670 | 269,727,476 | -1,903 | 277,164 | 168,969 | 227,594 | 100,424 | 103,308 | 741,030 | 65,376 | 146,820 | 569,644 | -56,044 | 1,991,315 | 13,016,490 | 3,439,893 | -3,292,785 | -6,309,282 | -7,588,632 | 738,490 | -7,604,889 | 9,756,983 | 39,589,171 | 10,639,956 | -19,834,311 | -2,813,145 | -146,394 | -2,063,561 | 439,952 | 53,011,239 | 200,683,326 | -1,136,505 | 157,605,523 |
| Net realized and unrealized gain (loss) | -198,343 | -655,216 | 523,713 | -30,846 | -41,506,278 | -14,418,639 | -38,222,241 | 30,497,632 | 1,001,581 | -3,747,142 | 313,790 | -2,645,192 | -38,028,963 | -24,877,579 | 43,793,566 | -51,841,333 | -26,077,138 | -67,146,826 | 76,559,450 | -84,817,150 | -247,809 | -65,844 | -118,157 | -201,038 | -122,330 | [1] | -1,475,308 | 1,742,775 | -39,284,267 | -27,155,422 | -32,505,877 | 3,825,332 | -14,083,894 | -11,472,269 | 88,693,493 | 7,427,161 | 148,876 | 1,527,523 | -799,193 | 740,741 | 35,386,540 | 60,875,920 | 71,882,143 | -10,244,934 | -5,107,353 | 15,057,958 | 7,667,362 | 7,815,101 | 30,664,955 | 70,513,591 | -125,848,750 | 84,502,778 | 124,899,612 | 365,198,197 | -444,224,661 | 217,987,272 | 97,126 | 154,043 | -694,042 | 268,708 | 155,523 | 116,060 | -70,626 | 45,140 | 236,957 | -1,125,111 | -187,075 | -56,630,451 | -72,595,794 | -99,431,448 | -140,998,146 | -13,237,039 | -27,514,173 | -18,935,042 | -53,275,910 | -187,604,306 | -259,596,838 | -291,627,352 | -497,745,056 | 34,822,564 | 10,124,237 | 56,649,348 | 14,787,681 | -196,089,130 | 14,418,960 | -705,673,055 | -474,415,931 |
| Net income (loss) | ($206,793) | ($662,038) | $500,463 | ($72,005) | ($42,543,150) | ($14,660,360) | ($40,018,691) | $29,651,280 | $953,546 | ($3,788,730) | $147,599 | ($2,795,848) | ($38,312,878) | ($25,134,078) | $42,949,681 | ($52,743,503) | ($26,287,608) | ($67,436,975) | $75,847,387 | ($85,966,491) | ($263,838) | ($74,855) | ($127,645) | ($234,044) | ($129,874) | [1] | ($1,534,929) | $1,644,116 | ($40,414,348) | ($29,047,798) | ($35,880,189) | ($2,161,181) | ($15,248,731) | ($11,967,966) | $85,414,685 | $5,832,449 | $139,501 | $1,507,975 | ($829,770) | $681,176 | $35,003,030 | $60,007,234 | $70,051,263 | ($12,437,415) | ($5,321,490) | $14,880,822 | $7,143,664 | $7,418,994 | $30,273,369 | $69,750,750 | ($127,422,097) | $82,107,637 | $123,633,871 | $363,538,780 | ($448,321,443) | $212,883,741 | $89,173 | $146,002 | ($720,670) | $260,585 | $143,315 | $89,070 | ($120,077) | $37,783 | $225,598 | ($1,149,755) | ($221,209) | ($56,985,138) | ($72,889,707) | ($100,548,706) | ($141,740,089) | ($13,402,731) | ($27,704,015) | ($19,325,003) | ($53,879,615) | ($188,863,858) | ($260,642,013) | ($295,350,108) | ($500,065,059) | $34,483,293 | $10,000,502 | $55,800,458 | $14,514,263 | ($204,454,512) | $6,005,740 | ($730,212,090) | ($499,281,298) |
| Net income (loss) per weighted-average share | ($3.45) | ($11.03) | $8.34 | ($0.65) | ($2.84) | ($5.67) | ($5.04) | $9.23 | $4.97 | ($30.64) | $0.60 | ($26.12) | ($27.99) | ($14.32) | $27.46 | ($26.76) | ($23.75) | ($29.10) | $46.96 | ($28.59) | ($1.46) | ($0.75) | ($1.29) | ($1.84) | ($1.32) | [1] | ($2.94) | $5.43 | ($1.53) | ($0.72) | ($1.36) | ($0.05) | ($1.92) | ($2.24) | $10.85 | $1.05 | $0.70 | $4.53 | ($4.03) | $1.98 | $7.77 | $4.94 | $8.11 | ($1.35) | ($2.33) | $10.27 | $4.27 | $7.15 | $9.07 | $17.08 | ($34.81) | $19.69 | $4.48 | $21.31 | ($19.74) | $13.40 | $0.90 | $1.46 | ($7.21) | $1.78 | $0.57 | $0.54 | ($0.39) | $0.25 | $1.50 | ($7.08) | ($1.47) | ($14.03) | ($59.55) | ($27.74) | ($184.59) | ($4.01) | ($14.21) | ($7.65) | ($30.91) | ($26.62) | ($545.19) | ($62.27) | ($2,302.64) | $38.81 | $23.35 | $66.80 | $32.15 | ' | ' | ' | ' |
| Weighted-average shares outstanding | 59,997 | 59,997 | 59,997 | 110,544 | 14,997,661 | 2,585,500 | 7,941,189 | 3,213,878 | 191,799 | 123,649 | 244,171 | 107,033 | 1,368,717 | 1,754,812 | 1,564,194 | 1,970,970 | 1,106,858 | 2,317,728 | 1,615,265 | 3,006,900 | 180,983 | 100,005 | 98,974 | 127,294 | 98,689 | [1] | 522,831 | 302,935 | 26,331,536 | 40,283,166 | 26,459,721 | 43,594,175 | 7,957,990 | 5,349,294 | 7,874,019 | 5,542,177 | 200,014 | 333,166 | 205,692 | 344,357 | 4,506,235 | 12,151,344 | 8,637,082 | 9,201,542 | 2,285,158 | 1,448,274 | 1,671,223 | 1,037,473 | 3,338,057 | 4,083,166 | 3,661,003 | 4,169,722 | 27,610,354 | 17,063,071 | 22,709,918 | 15,891,269 | 98,689 | 100,005 | 100,005 | 146,210 | 250,014 | 166,131 | 310,963 | 150,014 | 150,014 | 162,285 | 150,014 | 4,060,410 | 1,224,023 | 3,624,196 | 767,866 | 3,342,125 | 1,950,005 | 2,527,569 | 1,743,162 | 7,094,448 | 478,073 | 4,743,317 | 217,170 | 888,607 | 428,281 | 835,368 | 451,480 | ' | ' | ' | ' |
| [1] | Since the Fund commenced investment operations on July 17, 2012, the Statement of Operations for the nine months ended September 30, 2012 has not been provided. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Statement_of_Changes_in_Shareh
| Statement of Changes in Shareholders' Equity (USD $) | ProShares UltraShort DJ-UBS Commodity [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Silver [Member] | ProShares Short Euro [Member] | ProShares UltraShort Australian Dollar [Member] | ProShares UltraShort Euro [Member] | ProShares UltraShort Yen [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ProShares Ultra Gold [Member] | ProShares Ultra Silver [Member] | ProShares Ultra Australian Dollar [Member] | ProShares Ultra Euro [Member] | ProShares Ultra Yen [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ProShares Trust II [Member] | |
| Beginning balance at Dec. 31, 2012 | $3,245,965 | $89,481,266 | $12,768,340 | $92,416,742 | $100,656,703 | $3,763,040 | $3,780,999 | $526,778,026 | $408,563,630 | $6,097,211 | $483,508,964 | $73,019,370 | $335,054,752 | $747,725,400 | $4,150,068 | $4,870,316 | $4,227,995 | $137,657,464 | $37,302,992 | $84,716,132 | $82,663,633 | $3,242,449,608 | |
| Addition of shares | ' | 734,161,837 | 30,364,906 | 148,082,137 | 220,175,462 | 3,748,394 | 18,553,112 | 119,076,233 | 272,070,096 | ' | 219,201,551 | 134,247,069 | 30,696,013 | 333,745,816 | ' | ' | 1,323,474 | 428,238,793 | 132,906,931 | 1,605,278,513 | 402,441,178 | 4,834,311,515 | |
| Redemption of shares | ' | -341,163,384 | -27,245,818 | -138,335,150 | -281,178,476 | ' | ' | -153,214,026 | -302,766,273 | -1,275,613 | -635,686,992 | -120,220,935 | -65,782,385 | -79,224,344 | ' | -2,433,926 | -1,180,652 | -298,261,923 | -54,119,769 | -1,108,443,904 | -446,389,191 | -4,056,923,361 | [1],[2] |
| Net addition (redemption) of shares | ' | 392,998,453 | 3,119,088 | 9,746,987 | -61,003,014 | ' | ' | -34,137,793 | -30,696,177 | ' | -416,485,441 | 14,026,134 | -35,086,372 | 254,521,472 | ' | ' | 142,822 | 129,976,870 | 78,787,162 | 496,834,609 | -43,948,013 | 777,388,154 | |
| Net investment income (loss) | -23,250 | -1,796,450 | -166,191 | -843,885 | -712,063 | -33,006 | -98,659 | -3,374,312 | -3,278,808 | -30,577 | -1,830,880 | -523,698 | -1,573,347 | -4,096,782 | -26,628 | -26,990 | -24,644 | -1,117,258 | -389,961 | -3,722,756 | -848,890 | -24,539,035 | |
| Net realized gain (loss) | 472,355 | -91,271,858 | 255,984 | 39,766,657 | 86,830,919 | -114,800 | 2,294,668 | -19,715,453 | 139,337,127 | -868,012 | 140,898,148 | 415,531 | -124,323,199 | -509,870,331 | -863,011 | 12,752 | -1,694,755 | -102,871,341 | -19,673,532 | -302,267,308 | 58,712,909 | -704,536,550 | |
| Change in net unrealized appreciation/depreciation | 51,358 | 53,049,617 | 57,806 | 4,026,909 | -10,271,469 | -86,238 | -551,893 | -12,790,424 | -50,643,634 | 68,819 | -69,016,005 | 7,251,831 | -1,525,551 | 65,645,670 | 168,969 | 103,308 | 569,644 | 3,439,893 | 738,490 | 10,639,956 | -2,063,561 | -1,136,505 | |
| Net income (loss) | 500,463 | -40,018,691 | 147,599 | 42,949,681 | 75,847,387 | -234,044 | 1,644,116 | -35,880,189 | 85,414,685 | -829,770 | 70,051,263 | 7,143,664 | -127,422,097 | -448,321,443 | -720,670 | 89,070 | -1,149,755 | -100,548,706 | -19,325,003 | -295,350,108 | 55,800,458 | -730,212,090 | |
| Ending balance at Sep. 30, 2013 | 3,746,428 | 442,461,028 | 16,035,027 | 145,113,410 | 115,501,076 | 7,277,390 | 23,978,227 | 456,760,044 | 463,282,138 | 3,991,828 | 137,074,786 | 94,189,168 | 172,546,283 | 553,925,429 | 3,429,398 | 2,525,460 | 3,221,062 | 167,085,628 | 96,765,151 | 286,200,633 | 94,516,078 | 3,289,625,672 | |
| Beginning balance at Jun. 30, 2013 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |
| Net investment income (loss) | -8,450 | -1,036,872 | -48,035 | -283,915 | -210,470 | -16,029 | -59,621 | -1,130,081 | -1,164,837 | -9,375 | -383,510 | -214,137 | -391,586 | -1,265,741 | -8,041 | -8,123 | -7,357 | -354,687 | -165,692 | -1,259,552 | -339,271 | -8,365,382 | |
| Net realized gain (loss) | 13,686 | -86,180,653 | 2,863,123 | 6,023,935 | 6,007,983 | -39,009 | 389,410 | -8,623,142 | -5,692,393 | -85,067 | 53,591,304 | -14,490,187 | -5,907,842 | 28,405,829 | -123,121 | 41,114 | -20,236 | -58,621,766 | -6,927,757 | -197,361,289 | 37,635,709 | -249,100,369 | |
| Change in net unrealized appreciation/depreciation | -212,029 | 44,674,375 | -1,861,542 | -44,052,898 | -32,085,121 | -208,800 | -1,864,718 | -30,661,125 | -8,391,501 | 233,943 | -18,204,764 | 9,382,834 | 36,572,797 | 96,493,783 | 277,164 | 227,594 | 65,376 | 1,991,315 | -6,309,282 | 9,756,983 | -2,813,145 | 53,011,239 | |
| Net income (loss) | -206,793 | -42,543,150 | 953,546 | -38,312,878 | -26,287,608 | -263,838 | -1,534,929 | -40,414,348 | -15,248,731 | 139,501 | 35,003,030 | -5,321,490 | 30,273,369 | 123,633,871 | 146,002 | 260,585 | 37,783 | -56,985,138 | -13,402,731 | -188,863,858 | 34,483,293 | -204,454,512 | |
| Ending balance at Sep. 30, 2013 | $3,746,428 | $442,461,028 | $16,035,027 | $145,113,410 | $115,501,076 | $7,277,390 | $23,978,227 | $456,760,044 | $463,282,138 | $3,991,828 | $137,074,786 | $94,189,168 | $172,546,283 | $553,925,429 | $3,429,398 | $2,525,460 | $3,221,062 | $167,085,628 | $96,765,151 | $286,200,633 | $94,516,078 | $3,289,625,672 | |
| [1] | For forward agreements, a positive amount represents "long" exposure to the underlying commodity. A negative amount represents "short" exposure to the underlying commodity | ||||||||||||||||||||||
| [2] | Amount includes $600 of redemptions related to the termination of offerings of the New Funds. See Note 1. | ||||||||||||||||||||||
Statements_of_Cash_Flows
| Statements of Cash Flows (USD $) | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||||||||||||||||||||||||||||||||||
| Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | ||||
| ProShares UltraShort DJ-UBS Commodity [Member] | ProShares UltraShort DJ-UBS Commodity [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Silver [Member] | ProShares UltraShort Silver [Member] | ProShares Short Euro [Member] | ProShares Short Euro [Member] | ProShares UltraShort Australian Dollar [Member] | ProShares UltraShort Australian Dollar [Member] | ProShares UltraShort Euro [Member] | ProShares UltraShort Euro [Member] | ProShares UltraShort Yen [Member] | ProShares UltraShort Yen [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ProShares Ultra Gold [Member] | ProShares Ultra Gold [Member] | ProShares Ultra Silver [Member] | ProShares Ultra Silver [Member] | ProShares Ultra Australian Dollar [Member] | ProShares Ultra Australian Dollar [Member] | ProShares Ultra Euro [Member] | ProShares Ultra Euro [Member] | ProShares Ultra Yen [Member] | ProShares Ultra Yen [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ProShares Trust II [Member] | ProShares Trust II [Member] | ||||
| Cash flow from operating activities | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |||
| Net income (loss) | $500,463 | ($72,005) | ($40,018,691) | $29,651,280 | $147,599 | ($2,795,848) | $42,949,681 | ($52,743,503) | $75,847,387 | ($85,966,491) | ($127,645) | ($234,044) | ($129,874) | [1] | $1,644,116 | ($35,880,189) | ($2,161,181) | $85,414,685 | $5,832,449 | ($829,770) | $681,176 | $70,051,263 | ($12,437,415) | $7,143,664 | $7,418,994 | ($127,422,097) | $82,107,637 | ($448,321,443) | $212,883,741 | $89,173 | ($720,670) | $89,070 | ($120,077) | ($1,149,755) | ($221,209) | ($100,548,706) | ($141,740,089) | ($19,325,003) | ($53,879,615) | ($295,350,108) | ($500,065,059) | $55,800,458 | $14,514,263 | ($730,212,090) | ($499,281,298) | ||
| Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |||
| Decrease (Increase) in segregated cash balances with brokers for futures contracts | ' | ' | -12,641,916 | 4,325,029 | -286,280 | -760,225 | -2,750 | -455 | -550 | 15,760 | -79,200 | -55,000 | -206,250 | -900,207 | ' | ' | ' | ' | ' | ' | 18,427,197 | -3,115,277 | -1,958,120 | -10,458,841 | -2,750 | 6,045 | -550 | 18,210 | -217,250 | 9,438 | ' | ' | ' | ' | 4,750,998 | -40,524,749 | -6,282,900 | -18,471,651 | -62,030,793 | -84,191,092 | 4,007,197 | -10,923,896 | -56,966,986 | -164,583,842 | |||
| Net sale (purchase) of short-term U.S. government and agency obligations | -393,331 | 5,834,957 | -331,957,513 | 25,706,108 | -3,616,197 | -7,368,751 | -48,555,554 | 62,844,243 | -19,846,952 | 85,371,648 | -3,446,976 | -3,257,086 | -3,302,978 | -18,712,921 | 70,603,634 | 220,067,988 | -112,971,096 | -12,529,606 | 2,133,006 | 1,812,451 | 301,252,163 | -119,232,604 | -10,924,298 | -65,921,169 | 160,943,187 | 41,103,492 | 257,179,896 | -128,635,476 | -3,463,947 | 570,805 | 2,256,005 | 4,760,401 | 1,468,886 | 286,975 | 13,834,840 | -94,356,539 | 2,148,865 | 13,635,156 | -100,070,302 | -111,374,656 | -8,621,966 | -35,052,708 | 153,464,071 | -123,261,991 | |||
| Change in unrealized appreciation/depreciation on investments | -51,358 | 684,049 | -40,303,300 | -2,769,833 | 343 | -723 | -4,051,549 | 42,487,515 | 10,229,269 | 57,484,277 | -18 | 200 | -17 | -309 | 12,790,424 | 102,555,076 | 50,643,634 | -1,730,121 | -68,819 | -975,248 | 44,344,829 | 3,453,343 | -486 | -1,575 | 1,550,211 | -111,496,471 | -65,603,470 | -269,601,706 | -27 | 185 | -103,308 | -741,030 | -569,644 | 56,044 | 1,732 | -5,216 | 1,300 | -6,800 | 295,676 | 1,824,359 | 807 | -515 | 9,106,367 | -178,784,637 | |||
| Decrease (Increase) in receivable on futures contracts | ' | ' | -2,100,651 | 576,597 | 587,465 | 123,128 | -2,440 | -1,320 | -580 | ' | -19,500 | 6,612 | -51,288 | ' | ' | ' | ' | ' | ' | ' | 3,430,415 | -1,043,668 | ' | -2,218,701 | 3,980 | 540 | 2,520 | 6,000 | ' | 6,820 | ' | ' | ' | ' | -7,590,541 | -2,426,098 | -1,619,391 | 798,319 | -30,450,046 | -2,955,509 | 5,524,721 | ' | -32,201,116 | -7,211,500 | |||
| Decrease (Increase) in receivable from Sponsor | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 5,373 | -17 | |||
| Decrease (Increase) in Limitation by Sponsor | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -964 | 2,145 | -1,012 | 2,216 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | -522 | 1,012 | ' | ' | ' | ' | ' | ' | ' | 2,481 | ' | ' | ' | ' | ' | ' | |||
| Change in offering cost | ' | ' | ' | ' | ' | 19,574 | ' | ' | ' | ' | 10,896 | 19,770 | 8,537 | 22,129 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 19,574 | ' | ' | ' | ' | 8,537 | 22,128 | ' | ' | ' | ' | ' | 1,090 | ' | 682 | ' | 21,270 | ' | 21,270 | 64,027 | 111,430 | |||
| Increase (Decrease) in management fee payable | 276 | -5,076 | 297,353 | -18,181 | 35 | 6,661 | 17,818 | -47,596 | -924 | -94,337 | ' | 5,758 | ' | 19,068 | -129,118 | -242,729 | 107,034 | -1,421 | -1,793 | -958 | -292,552 | 51,287 | 20,030 | 54,666 | -139,058 | -12,934 | -183,794 | 142,746 | ' | 2,639 | -1,219 | -1,684 | -1,180 | -249 | 12,187 | 87,730 | 6,745 | 70,197 | 113,764 | 166,745 | 20,936 | 19,033 | -125,995 | 173,900 | |||
| Increase (Decrease) in payable on futures contracts | ' | ' | -979,336 | ' | ' | 312,649 | -3,980 | ' | -2,520 | ' | ' | 3,225 | ' | 25,380 | ' | ' | ' | ' | ' | ' | 772,970 | ' | -2,892,640 | ' | 2,440 | ' | 1,780 | ' | 55,632 | ' | ' | ' | ' | ' | -31,540,181 | ' | -1,890,675 | 626,539 | -35,666,735 | -1,852,966 | 5,707,549 | 2,031,024 | -66,462,723 | 1,172,878 | |||
| Increase (Decrease) in payable for offering costs | ' | ' | ' | ' | ' | -26,624 | ' | ' | ' | ' | ' | -41,000 | ' | -41,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | -26,624 | ' | ' | ' | ' | ' | -41,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | -28,764 | ' | -28,764 | -123,000 | -110,776 | |||
| Net cash provided by (used in) operating activities | 56,050 | 6,441,925 | -427,704,054 | 57,471,000 | -3,167,035 | -10,490,159 | -9,648,774 | 52,538,884 | 66,225,130 | 56,810,857 | -3,663,407 | -3,549,420 | -3,682,882 | -17,941,528 | 47,384,751 | 320,219,154 | 23,194,257 | -8,428,699 | 1,232,624 | 1,517,421 | 437,986,285 | -132,324,334 | -8,611,850 | -71,133,676 | 34,935,913 | 11,708,309 | -256,925,061 | -185,186,485 | -3,528,404 | -148,643 | 2,240,548 | 3,897,610 | -251,693 | 121,561 | -121,079,671 | -278,963,871 | -26,961,059 | -57,224,692 | -523,158,544 | -698,455,672 | 62,439,702 | -29,420,293 | -723,452,072 | -971,775,853 | |||
| Cash flow from financing activities | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | |||
| Proceeds from addition of shares | ' | ' | 738,193,314 | 204,359,211 | 30,364,906 | 28,130,004 | 148,082,137 | ' | 220,175,462 | 296,567,192 | 4,000,000 | 3,748,394 | 4,000,000 | 18,553,112 | 119,076,233 | 254,964,609 | 279,683,729 | 146,771,879 | ' | ' | 212,258,224 | 591,617,005 | 129,408,077 | 97,320,934 | 30,696,013 | 57,677,607 | 335,894,773 | 373,543,705 | 4,000,000 | ' | ' | 1,209,580 | 1,323,474 | ' | 423,439,517 | 676,632,747 | 131,215,643 | 100,824,264 | 1,623,405,802 | 1,242,185,498 | 394,666,787 | 436,938,792 | 4,840,185,597 | 4,520,743,027 | |||
| Payment on shares redeemed | ' | -6,153,645 | -307,981,814 | -261,883,622 | -27,245,818 | -20,300,520 | -138,335,150 | -52,764,851 | -286,316,592 | -353,503,290 | ' | ' | ' | ' | -166,496,235 | -574,890,311 | -302,766,273 | -138,310,736 | -1,275,613 | -1,338,727 | -651,758,235 | -459,048,365 | -120,220,935 | -26,076,573 | -65,782,385 | -69,697,699 | -79,224,344 | -188,772,194 | ' | ' | -2,433,926 | -4,841,780 | -1,180,652 | ' | -302,978,467 | -395,694,365 | -104,691,318 | -42,277,853 | -1,099,025,266 | -544,434,491 | -459,088,575 | -411,577,821 | -4,116,802,198 | [2] | -3,551,573,443 | [2] | |
| Net cash provided by (used in) financing activities | ' | -6,153,645 | 430,211,500 | -57,524,411 | 3,119,088 | 7,829,484 | 9,746,987 | -52,764,851 | -66,141,130 | -56,936,098 | 4,000,000 | 3,748,394 | 4,000,000 | 18,553,112 | -47,420,002 | -319,925,702 | -23,082,544 | 8,461,143 | -1,275,613 | -1,338,727 | -439,500,011 | 132,568,640 | 9,187,142 | 71,244,361 | -35,086,372 | -12,020,092 | 256,670,429 | 184,771,511 | 4,000,000 | ' | -2,433,926 | -3,632,200 | 142,822 | ' | 120,461,050 | 280,938,382 | 26,524,325 | 58,546,411 | 524,380,536 | 697,751,007 | -64,421,788 | 25,360,971 | 723,383,399 | 969,169,584 | |||
| Net increase (decrease) in cash | 56,050 | 288,280 | 2,507,446 | -53,411 | -47,947 | -2,660,675 | 98,213 | -225,967 | 84,000 | -125,241 | 336,593 | 198,974 | 317,118 | 611,584 | -35,251 | 293,452 | 111,713 | 32,444 | -42,989 | 178,694 | -1,513,726 | 244,306 | 575,292 | 110,685 | -150,459 | -311,783 | -254,632 | -414,974 | 471,596 | -148,643 | -193,378 | 265,410 | -108,871 | 121,561 | -618,621 | 1,974,511 | -436,734 | 1,321,719 | 1,221,992 | -704,665 | -1,982,086 | -4,059,322 | -68,673 | -2,606,269 | |||
| Cash, beginning of period | 296,119 | 9,060 | 658,676 | 265,258 | 310,060 | 2,969,266 | 175,194 | 330,841 | 344,378 | 648,166 | ' | 302,359 | 200 | 361,157 | 276,372 | 102,088 | 363,826 | 22,338 | 167,546 | 59,453 | 2,198,932 | 495,671 | 3,385,764 | 3,361,868 | 342,345 | 400,533 | 890,051 | 772,442 | 200 | 426,634 | 240,086 | 10,469 | 138,033 | 5,798 | 2,989,958 | 563,350 | 2,063,715 | 627,557 | 1,790,825 | 2,972,032 | 2,236,726 | 5,521,055 | 19,959,356 | 19,145,045 | |||
| Cash, end of period | $352,169 | $297,340 | $3,166,122 | $211,847 | $262,113 | $308,591 | $273,407 | $104,874 | $428,378 | $522,925 | $336,793 | $501,333 | $317,318 | $972,741 | $241,121 | $395,540 | $475,539 | $54,782 | $124,557 | $238,147 | $685,206 | $739,977 | $3,961,056 | $3,472,553 | $191,886 | $88,750 | $635,419 | $357,468 | $471,796 | $277,991 | $46,708 | $275,879 | $29,162 | $127,359 | $2,371,337 | $2,537,861 | $1,626,981 | $1,949,276 | $3,012,817 | $2,267,367 | $254,640 | $1,461,733 | $19,890,683 | $16,538,776 | |||
| [1] | Since the Fund commenced investment operations on July 17, 2012, the Statement of Operations for the nine months ended September 30, 2012 has not been provided. | ||||||||||||||||||||||||||||||||||||||||||||||
| [2] | Amount includes $600 of redemptions related to the termination of offerings of the New Funds. See Note 1. | ||||||||||||||||||||||||||||||||||||||||||||||
Statement_of_Changes_in_Shareh1
| Statement of Changes in Shareholders' Equity (Parenthetical) (USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' |
| Addition, shares | 22,350,000 |
| Redemption, shares | 9,950,000 |
| Net addition (redemption), shares | 12,400,000 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' |
| Addition, shares | 387,500 |
| Redemption, shares | 337,556 |
| Net addition (redemption), shares | 49,944 |
| ProShares UltraShort Gold [Member] | ' |
| Addition, shares | 1,750,000 |
| Redemption, shares | 1,550,000 |
| Net addition (redemption), shares | 200,000 |
| ProShares UltraShort Silver [Member] | ' |
| Addition, shares | 3,050,000 |
| Redemption, shares | 3,500,000 |
| Net addition (redemption), shares | -450,000 |
| ProShares Short Euro [Member] | ' |
| Addition, shares | 100,000 |
| ProShares UltraShort Australian Dollar [Member] | ' |
| Addition, shares | 450,000 |
| ProShares UltraShort Euro [Member] | ' |
| Addition, shares | 6,250,000 |
| Redemption, shares | 8,200,000 |
| Net addition (redemption), shares | -1,950,000 |
| ProShares UltraShort Yen [Member] | ' |
| Addition, shares | 4,300,000 |
| Redemption, shares | 4,900,000 |
| Net addition (redemption), shares | -600,000 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' |
| Redemption, shares | 50,000 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' |
| Addition, shares | 7,700,000 |
| Redemption, shares | 20,200,000 |
| Net addition (redemption), shares | -12,500,000 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' |
| Addition, shares | 3,750,000 |
| Redemption, shares | 2,700,000 |
| Net addition (redemption), shares | 1,050,000 |
| ProShares Ultra Gold [Member] | ' |
| Addition, shares | 550,000 |
| Redemption, shares | 1,150,000 |
| Net addition (redemption), shares | -600,000 |
| ProShares Ultra Silver [Member] | ' |
| Addition, shares | 13,550,000 |
| Redemption, shares | 3,350,000 |
| Net addition (redemption), shares | 10,200,000 |
| ProShares Ultra Euro [Member] | ' |
| Redemption, shares | 100,000 |
| ProShares Ultra Yen [Member] | ' |
| Addition, shares | 50,000 |
| Redemption, shares | 50,000 |
| Net addition (redemption), shares | 0 |
| ProShares VIX Short-Term Futures ETF [Member] | ' |
| Addition, shares | 8,170,000 |
| Redemption, shares | 5,585,189 |
| Net addition (redemption), shares | 2,584,811 |
| ProShares VIX Mid-Term Futures ETF [Member] | ' |
| Addition, shares | 5,200,000 |
| Redemption, shares | 2,100,000 |
| Net addition (redemption), shares | 3,100,000 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' |
| Addition, shares | 24,400,000 |
| Redemption, shares | 16,531,251 |
| Net addition (redemption), shares | 7,868,749 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' |
| Addition, shares | 4,600,000 |
| Redemption, shares | 4,950,000 |
| Net addition (redemption), shares | -350,000 |
| ProShares Trust II [Member] | ' |
| Addition, shares | 106,607,500 |
| Redemption, shares | 85,204,011 |
| Net addition (redemption), shares | 21,403,489 |
| Redemptions related to the termination | 600 |
Statements_of_Cash_Flows_Paren
| Statements of Cash Flows (Parenthetical) (ProShares Trust II [Member], USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| ProShares Trust II [Member] | ' |
| Redemptions related to termination of New Funds | $600 |
Organization
| Organization | 9 Months Ended | ||||||
| Sep. 30, 2013 | |||||||
| Accounting Policies [Abstract] | ' | ||||||
| Organization | ' | ||||||
| NOTE 1 – ORGANIZATION | |||||||
| Introduction | |||||||
| ProShares Trust II (formerly known as the Commodities and Currencies Trust) (the “Trust”) is a Delaware statutory trust formed on October 9, 2007 and is currently organized into separate series (each, a “Fund” and collectively, the “Funds”). As of September 30, 2013, the following twenty-one series of the Trust have commenced investment operations: (i) ProShares UltraShort DJ-UBS Commodity, ProShares UltraShort DJ-UBS Crude Oil, ProShares UltraShort DJ-UBS Natural Gas, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares UltraShort Australian Dollar, ProShares UltraShort Euro, ProShares UltraShort Yen, ProShares Ultra DJ-UBS Commodity, ProShares Ultra DJ-UBS Crude Oil, ProShares Ultra DJ-UBS Natural Gas, ProShares Ultra Gold, ProShares Ultra Silver, ProShares Ultra Australian Dollar, ProShares Ultra Euro and ProShares Ultra Yen (each, a “Leveraged Fund” and collectively, the “Leveraged Funds”); (ii) ProShares Short Euro (the “Short Euro Fund”); (iii) ProShares Ultra VIX Short-Term Futures ETF and ProShares Short VIX Short-Term Futures ETF (each, a “Geared VIX Fund” and collectively, the “Geared VIX Funds”); and (iv) ProShares VIX Short-Term Futures ETF and ProShares VIX Mid-Term Futures ETF (each, a “Matching VIX Fund” and collectively, the “Matching VIX Funds”). Each of the Funds listed above issues common units of beneficial interest (“Shares”), which represent units of fractional undivided beneficial interest in and ownership of only that Leveraged Fund, Short Euro Fund, Geared VIX Fund or Matching VIX Fund. The Shares of each Leveraged Fund, the Short Euro Fund, each Geared VIX Fund and each Matching VIX Fund are listed on the New York Stock Exchange Archipelago (“NYSE Arca”). The Leveraged Funds, the Short Euro Fund and the Geared VIX Funds, are collectively referred to as the “Geared Funds” in these Notes to Financial Statements. The Geared VIX Funds and the Matching VIX Funds are collectively referred to as the “VIX Funds” in these Notes to Financial Statements. | |||||||
| The Trust also registered shares for three additional series; ProShares UltraPro Short Euro, ProShares Managed Futures Strategy and ProShares Commodity Managed Futures Strategy, collectively referred to as the “New Funds” in these Notes to Financial Statements. On April 24, 2013, the registered offerings for each of the New Funds, which had never been publicly offered, were terminated. | |||||||
| The Trust had no operations prior to November 24, 2008, other than matters relating to its organization, the registration of each series under the Securities Act of 1933, as amended, and the sale and issuance to ProShare Capital Management LLC (the “Sponsor”) of fourteen Shares at an aggregate purchase price of $350 in each of the following Funds: ProShares UltraShort DJ-UBS Commodity, ProShares UltraShort DJ-UBS Crude Oil, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares UltraShort Euro, ProShares UltraShort Yen, ProShares Ultra DJ-UBS Commodity, ProShares Ultra DJ-UBS Crude Oil, ProShares Ultra Gold, ProShares Ultra Silver, ProShares Ultra Euro and ProShares Ultra Yen. | |||||||
| Eight of the Funds, ProShares UltraShort DJ-UBS Commodity, ProShares UltraShort DJ-UBS Crude Oil, ProShares UltraShort Euro, ProShares UltraShort Yen, ProShares Ultra DJ-UBS Commodity, ProShares Ultra DJ-UBS Crude Oil, ProShares Ultra Euro and ProShares Ultra Yen, commenced trading on the NYSE Arca on November 25, 2008. Four of the Funds, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares Ultra Gold and ProShares Ultra Silver, commenced trading on the NYSE Arca on December 3, 2008. Two of the Funds, ProShares VIX Short-Term Futures ETF and ProShares VIX Mid-Term Futures ETF, commenced trading on the NYSE Arca on January 3, 2011. Two of the Funds, ProShares Ultra VIX Short-Term Futures ETF and ProShares Short VIX Short-Term Futures ETF, commenced trading on the NYSE Arca on October 3, 2011. Two of the Funds, ProShares UltraShort DJ-UBS Natural Gas and ProShares Ultra DJ-UBS Natural Gas, commenced trading on the NYSE Arca on October 4, 2011. One of the Funds, ProShares Short Euro, commenced trading on the NYSE Arca on June 26, 2012. Two of the Funds, ProShares UltraShort Australian Dollar and ProShares Ultra Australian Dollar, commenced trading on the NYSE Arca on July 17, 2012. | |||||||
| Groups of Funds are collectively referred to in several different ways. References to “Short Funds,” “UltraShort Funds,” or “Ultra Funds” refer to the different Funds based upon their investment objectives, but without distinguishing among the Funds’ benchmarks. References to “Commodity Index Funds,” “Commodity Funds” and “Currency Funds” refer to the different Funds according to their general benchmark categories without distinguishing among the Funds’ investment objectives or Fund-specific benchmarks. References to “VIX Funds” refer to the different Funds based upon their investment objective and their general benchmark categories. | |||||||
| Each “Short” Fund seeks daily investment results (before fees and expenses) that correspond to the inverse (-1x) of the daily performance of its corresponding benchmark. Each “UltraShort” Fund seeks daily investment results (before fees and expenses) that correspond to two times the inverse (-2x) of the daily performance of its corresponding benchmark. Each “Ultra” Fund seeks daily investment results (before fees and expenses) that correspond to two times (2x) the daily performance of its corresponding benchmark. Daily performance is measured from the calculation of one NAV to the next. | |||||||
| Each of the Funds generally invests in Financial Instruments (i.e., instruments whose value is derived from the value of an underlying asset, rate or index, including futures contracts, swap agreements, forward contracts and other instruments) as a substitute for investing directly in commodities, currencies, or spot volatility products in order to gain exposure to the commodity futures index, commodity, currency or exchange rate, equity volatility index or applicable commodity or financial futures contracts. Financial Instruments also are used to produce economically “leveraged,” “inverse” or “inverse leveraged” investment results for the Geared Funds. Each Matching VIX Fund seeks results (before fees and expenses), both over a single day and over time, that match the performance of the S&P 500 VIX Short-Term Futures Index (the “Short-Term VIX Index”) or the S&P 500 VIX Mid-Term Futures Index (the “Mid-Term VIX Index”) (each a “VIX Futures Index”). Each Geared VIX Fund seeks daily investment results (before fees and expenses) that correspond to a multiple or the inverse of the daily performance of the Short-Term VIX Index. Each VIX Fund intends to obtain exposure to its benchmark by investing primarily in futures contracts (“VIX futures contracts”) based on the Chicago Board Options Exchange (“CBOE”) Volatility Index (the “VIX”). | |||||||
| The Geared Funds do not seek to achieve their stated investment objective over a period of time greater than a single day because mathematical compounding prevents the Geared Funds from achieving such results. Accordingly, results over periods of time greater than a single day should not be expected to be a simple multiple (e.g., -1x, -2x or 2x) of the period return of the corresponding benchmark and will likely differ significantly. The Matching VIX Funds seek to achieve their stated investment objective both over a single day and over time. | |||||||
| ProShares UltraShort DJ-UBS Commodity, ProShares UltraShort DJ-UBS Crude Oil, ProShares UltraShort DJ-UBS Natural Gas, ProShares Ultra DJ-UBS Commodity, ProShares Ultra DJ-UBS Crude Oil and ProShares Ultra DJ-UBS Natural Gas each have a benchmark that is an index designed to track the performance of commodity futures contracts, as applicable. The daily performance of these indexes and the corresponding Funds will likely be very different from the daily performance of the price of the related physical commodities. | |||||||
| Renaming of Index | |||||||
| Effective as of January 2, 2012, the official name for the Dow Jones-UBS Crude Oil SubindexSM (Ticker: DJUBSCL) changed to the Dow Jones-UBS WTI Crude Oil SubindexSM. The ticker did not change as a result of the name change. | |||||||
| Share Splits and Reverse Share Splits | |||||||
| The table below includes Share splits and reverse Share splits for the Funds during the nine months ended September 30, 2013 and year ended December 31, 2012. The ticker symbols for these Funds did not change and each Fund continues to trade on the NYSE Arca. | |||||||
| Fund | Execution Date | Type of Split | Date Trading | ||||
| (Prior to Opening | Resumed at Post- | ||||||
| of Trading) | Split Price | ||||||
| ProShares UltraShort DJ-UBS Natural Gas | May 11, 2012 | 3-for-1 Share split | May 11, 2012 | ||||
| ProShares UltraShort DJ-UBS Natural Gas | 10-Jun-13 | 1-for-4 reverse Share split | June 10, 2013 | ||||
| ProShares UltraShort Gold | October 5, 2012 | 1-for-4 reverse Share split | October 5, 2012 | ||||
| ProShares UltraShort Silver | May 11, 2012 | 1-for-5 reverse Share split | May 11, 2012 | ||||
| ProShares Ultra DJ-UBS Natural Gas | May 11, 2012 | 1-for-5 reverse Share split | May 11, 2012 | ||||
| ProShares VIX Short-Term Futures ETF | 10-Jun-13 | 1-for-5 reverse Share split | 10-Jun-13 | ||||
| ProShares Ultra VIX Short-Term Futures ETF | March 8, 2012 | 1-for-6 reverse Share split | March 8, 2012 | ||||
| ProShares Ultra VIX Short-Term Futures ETF | September 7, 2012 | 1-for-10 reverse Share split | September 7, 2012 | ||||
| ProShares Ultra VIX Short-Term Futures ETF | 10-Jun-13 | 1-for-10 reverse Share split | 10-Jun-13 | ||||
| ProShares Short VIX Short-Term Futures ETF | October 5, 2012 | 2-for-1 Share split | October 5, 2012 | ||||
| The reverse splits were applied retroactively for all periods presented, reducing the number of Shares outstanding for each of ProShares UltraShort DJ-UBS Natural Gas, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares Ultra DJ-UBS Natural Gas, ProShares VIX Short-Term Futures ETF and ProShares Ultra VIX Short-Term Futures ETF, and resulted in a proportionate increase in the price per Share and per Share information of each such Fund. Therefore, the reverse splits did not change the aggregate net asset value of a shareholder’s investment at the time of the reverse split. | |||||||
| The splits were applied retroactively for all periods presented, increasing the number of Shares outstanding for ProShares UltraShort DJ-UBS Natural Gas and ProShares Short VIX Short-Term Futures ETF, and resulted in a proportionate decrease in the price per Share and per Share information of each such Fund. Therefore, the splits did not change the aggregate net asset value of a shareholder’s investment at the time of the split. | |||||||
Significant_Accounting_Policie
| Significant Accounting Policies | 9 Months Ended | ||||||||||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||||||||||
| Accounting Policies [Abstract] | ' | ||||||||||||||||||||||||
| Significant Accounting Policies | ' | ||||||||||||||||||||||||
| NOTE 2 – SIGNIFICANT ACCOUNTING POLICIES | |||||||||||||||||||||||||
| The following is a summary of significant accounting policies followed by each Fund, as applicable, in preparation of its financial statements. These policies are in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Certain prior year amounts have been reclassified to conform to the current year presentation. | |||||||||||||||||||||||||
| The accompanying unaudited financial statements were prepared in accordance with GAAP for interim financial information and with the instructions for Form 10-Q and the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). In the opinion of management, all material adjustments, consisting only of normal recurring adjustments, considered necessary for a fair statement of the interim period financial statements have been made. Interim period results are not necessarily indicative of results for a full-year period. These financial statements and the notes thereto should be read in conjunction with the Trust’s and the Funds’ financial statements included in the Trust’s Annual Report on Form 10-K for the year ended December 31, 2012, as filed with the SEC on March 1, 2013. | |||||||||||||||||||||||||
| Use of Estimates & Indemnifications | |||||||||||||||||||||||||
| The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in these financial statements. Actual results could differ from those estimates. | |||||||||||||||||||||||||
| In the normal course of business, the Trust enters into contracts that contain a variety of representations which provide general indemnifications. The Trust’s maximum exposure under these arrangements cannot be known; however, the Trust expects any risk of loss to be remote. | |||||||||||||||||||||||||
| Basis of Presentation | |||||||||||||||||||||||||
| Pursuant to rules and regulations of the SEC, financial statements are presented for the Trust as a whole, as the SEC registrant, and for each Fund individually. The debts, liabilities, obligations and expenses incurred, contracted for or otherwise existing with respect to a particular Fund shall be enforceable only against the assets of such Fund and not against the assets of the Trust generally or any other Fund. Accordingly, the assets of one Fund of the Trust include only those funds and other assets that are paid to, held by or distributed to the Trust for the purchase of Shares in that Fund. | |||||||||||||||||||||||||
| Statement of Cash Flows | |||||||||||||||||||||||||
| The cash amount shown in the Statements of Cash Flows is the amount reported as cash in the Statement of Financial Condition dated September 30, 2013, and represents non-segregated cash with the custodian and does not include short-term investments. | |||||||||||||||||||||||||
| Final Net Asset Value for Fiscal Period | |||||||||||||||||||||||||
| The times of the calculation of the Leveraged Funds’, the Short Euro Fund’s, the Geared VIX Funds’ and the Matching VIX Funds’ final net asset value for creation and redemption of fund Shares for the three months and nine months ended September 30, 2013 were as follows. All times are Eastern Standard Time: | |||||||||||||||||||||||||
| NAV Calculation Time | NAV Calculation Date | ||||||||||||||||||||||||
| UltraShort Silver, Ultra Silver | 7:00 A.M. | September 30 | |||||||||||||||||||||||
| UltraShort Gold, Ultra Gold | 10:00 A.M. | September 30 | |||||||||||||||||||||||
| UltraShort DJ-UBS Crude Oil, Ultra DJ-UBS Crude Oil | 2:30 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort DJ-UBS Natural Gas, Ultra DJ-UBS Natural Gas | 2:30 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort DJ-UBS Commodity, Ultra DJ-UBS Commodity | 3:00 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort Australian Dollar, Ultra Australian Dollar | 4:00 P.M. | September 30 | |||||||||||||||||||||||
| Short Euro, UltraShort Euro, Ultra Euro | 4:00 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort Yen, Ultra Yen | 4:00 P.M. | September 30 | |||||||||||||||||||||||
| VIX Short-Term Futures ETF, Ultra VIX Short-Term Futures ETF, Short VIX Short-Term Futures ETF | 4:15 P.M. | September 30 | |||||||||||||||||||||||
| VIX Mid-Term Futures ETF | 4:15 P.M. | September 30 | |||||||||||||||||||||||
| Although the Leveraged Funds’, the Short Euro Fund’s, the Geared VIX Funds’ and the Matching VIX Funds’ Shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the three months and nine months ended September 30, 2013. | |||||||||||||||||||||||||
| Market value per Share is determined at the close of the NYSE Arca and may be later than when the Funds’ NAV per Share is calculated. | |||||||||||||||||||||||||
| For financial reporting purposes, the Leveraged Funds, the Short Euro Fund, and the VIX Funds value transactions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements may differ from those used in the calculation of certain Leveraged Funds’, the Short Euro Fund’s and VIX Funds’ final creation/redemption NAV for the three months and nine months ended September 30, 2013. | |||||||||||||||||||||||||
| Investment Valuation | |||||||||||||||||||||||||
| Short-term investments are valued at amortized cost which approximates fair value for daily NAV purposes. For financial reporting purposes, short-term investments are valued at their market price using information provided by a third-party pricing service or market quotations. In each of these situations, valuations are typically categorized as Level I in the fair value hierarchy. | |||||||||||||||||||||||||
| Derivatives (e.g., futures contracts, swap agreements, forward agreements and foreign currency forward contracts) are generally valued using independent sources and/or agreements with counterparties or other procedures as determined by the Sponsor. Futures contracts, except for those entered into by the Gold, Silver, Australian Dollar and Short Euro Funds, are generally valued at the last settled price on the applicable exchange on which that future trades. Futures contracts entered into by the Gold, Silver, Australian Dollar and Short Euro Funds are valued at the last sales price prior to the time at which the NAV per Share of a Fund is determined. For financial reporting purposes, all futures contracts are valued at the last settled price. Futures contracts valuations are typically categorized as Level I in the fair value hierarchy. Swap agreements, forward agreements and foreign currency forward contracts valuations are typically categorized as Level II in the fair value hierarchy. If there was no sale on that day, and for non-exchange-traded derivatives, the Sponsor may in its sole discretion choose to determine a fair value price as the basis for determining the market value of such position for such day. Such fair value prices would be generally determined based on available inputs about the current value of the underlying financial instrument or commodity and would be based on principles that the Sponsor deems fair and equitable so long as such principles are consistent with normal industry standards. When market closing prices are not available, the Sponsor may fair value an asset of a Fund pursuant to the policies the Sponsor has adopted, which are consistent with normal industry standards. Depending on the source and relevant significance of valuation inputs, these instruments may be classified as Level II or Level III in the fair value hierarchy. | |||||||||||||||||||||||||
| Fair value pricing may require subjective determinations about the value of an investment. While the Leveraged Funds’, the Short Euro Fund’s and the VIX Funds’ policies are intended to result in a calculation of a Leveraged Fund’s, the Short Euro Fund’s or a VIX Fund’s NAV that fairly reflects investment values as of the time of pricing, a Leveraged Fund, the Short Euro Fund or a VIX Fund cannot ensure that fair values determined by the Sponsor or persons acting at their direction would accurately reflect the price that a Fund could obtain for an investment if it were to dispose of that investment as of the time of pricing (for instance, in a forced or distressed sale). The prices used by a Leveraged Fund, the Short Euro Fund or a VIX Fund may differ from the value that would be realized if the investments were sold and the differences could be material to the financial statements. | |||||||||||||||||||||||||
| Fair Value of Financial Instruments | |||||||||||||||||||||||||
| The Funds disclose the fair value of their investments in a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Funds (observable inputs); and (2) the Funds’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements hierarchy are as follows: | |||||||||||||||||||||||||
| Level I – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. | |||||||||||||||||||||||||
| Level II – Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market-corroborated inputs). | |||||||||||||||||||||||||
| Level III – Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. | |||||||||||||||||||||||||
| In some instances, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest input level that is significant to the fair value measurement in its entirety. | |||||||||||||||||||||||||
| Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. | |||||||||||||||||||||||||
| The following table summarizes the valuation of investments at September 30, 2013 using the fair value hierarchy: | |||||||||||||||||||||||||
| Level I - Quoted Prices | Level II - Other Significant Observable Inputs | ||||||||||||||||||||||||
| Short-Term U.S. | Futures | Forward | Foreign | Swap | Total | ||||||||||||||||||||
| Government and | Contracts* | Agreements | Currency | Agreements | |||||||||||||||||||||
| Agencies | Forward | ||||||||||||||||||||||||
| Contracts | |||||||||||||||||||||||||
| UltraShort DJ-UBS Commodity | $ | 3,196,967 | $ | — | $ | — | $ | — | $ | 200,128 | $ | 3,397,095 | |||||||||||||
| UltraShort DJ-UBS Crude Oil | 419,011,935 | 8,716,596 | — | — | 34,688,207 | 462,416,738 | |||||||||||||||||||
| UltraShort DJ-UBS Natural Gas | 13,658,585 | 467,284 | — | — | — | 14,125,869 | |||||||||||||||||||
| UltraShort Gold | 137,129,907 | (9,400 | ) | 7,782,450 | — | — | 144,902,957 | ||||||||||||||||||
| UltraShort Silver | 106,048,955 | (2,180 | ) | 9,083,114 | — | — | 115,129,889 | ||||||||||||||||||
| Short Euro | 6,666,790 | (141,094 | ) | — | — | — | 6,525,696 | ||||||||||||||||||
| UltraShort Australian Dollar | 22,016,137 | (466,612 | ) | — | — | — | 21,549,525 | ||||||||||||||||||
| UltraShort Euro | 482,820,998 | — | — | (25,932,066 | ) | — | 456,888,932 | ||||||||||||||||||
| UltraShort Yen | 475,704,411 | — | — | (12,519,543 | ) | — | 463,184,868 | ||||||||||||||||||
| Ultra DJ-UBS Commodity | 4,107,868 | — | — | — | (237,372 | ) | 3,870,496 | ||||||||||||||||||
| Ultra DJ-UBS Crude Oil | 136,394,297 | (2,710,766 | ) | — | — | (10,995,019 | ) | 122,688,512 | |||||||||||||||||
| Ultra DJ-UBS Natural Gas | 75,238,008 | 3,434,395 | — | — | — | 78,672,403 | |||||||||||||||||||
| Ultra Gold | 189,669,408 | 9,420 | (17,189,960 | ) | — | — | 172,488,868 | ||||||||||||||||||
| Ultra Silver | 633,827,603 | 2,180 | (80,087,349 | ) | — | — | 553,742,434 | ||||||||||||||||||
| Ultra Australian Dollar | 2,999,904 | 70,124 | — | — | — | 3,070,028 | |||||||||||||||||||
| Ultra Euro | 2,290,933 | — | — | 190,473 | — | 2,481,406 | |||||||||||||||||||
| Ultra Yen | 3,118,885 | — | — | 75,495 | — | 3,194,380 | |||||||||||||||||||
| VIX Short-Term Futures ETF | 130,224,349 | 3,220,206 | — | — | — | 133,444,555 | |||||||||||||||||||
| VIX Mid-Term Futures ETF | 77,780,701 | (730,620 | ) | — | — | — | 77,050,081 | ||||||||||||||||||
| Ultra VIX Short-Term Futures ETF | 197,516,820 | 12,992,694 | — | — | — | 210,509,514 | |||||||||||||||||||
| Short VIX Short-Term Futures ETF | 62,307,511 | (3,449,929 | ) | — | — | — | 58,857,582 | ||||||||||||||||||
| Total Trust | 3,181,730,972 | 21,402,298 | (80,411,745 | ) | (38,185,641 | ) | 23,655,944 | 3,108,191,828 | |||||||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||||||||||
| At September 30, 2013, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. | |||||||||||||||||||||||||
| The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. | |||||||||||||||||||||||||
| The following table summarizes the valuation of investments at December 31, 2012 using the fair value hierarchy: | |||||||||||||||||||||||||
| Level I - Quoted Prices | Level II - Other Significant Observable Inputs | ||||||||||||||||||||||||
| Short-Term U.S. | Futures | Forward | Foreign | Swap | Total | ||||||||||||||||||||
| Government and | Contracts* | Agreements | Currency | Agreements | |||||||||||||||||||||
| Agencies | Forward | ||||||||||||||||||||||||
| Contracts | |||||||||||||||||||||||||
| UltraShort DJ-UBS Commodity | $ | 2,803,904 | $ | — | $ | — | $ | — | $ | 148,502 | $ | 2,952,406 | |||||||||||||
| UltraShort DJ-UBS Crude Oil | 87,046,389 | (4,029,721 | ) | — | — | (5,607,060 | ) | 77,409,608 | |||||||||||||||||
| UltraShort DJ-UBS Natural Gas | 10,042,731 | 409,135 | — | — | — | 10,451,866 | |||||||||||||||||||
| UltraShort Gold | 88,575,398 | 15,240 | 3,729,856 | — | — | 92,320,494 | |||||||||||||||||||
| UltraShort Silver | 86,206,701 | 40,020 | 19,307,685 | — | — | 105,554,406 | |||||||||||||||||||
| Short Euro | 3,409,904 | (55,056 | ) | — | — | — | 3,354,848 | ||||||||||||||||||
| UltraShort Australian Dollar | 3,302,907 | 85,590 | — | — | — | 3,388,497 | |||||||||||||||||||
| UltraShort Euro | 553,430,562 | — | — | (13,147,572 | ) | — | 540,282,990 | ||||||||||||||||||
| UltraShort Yen | 362,743,231 | — | — | 38,114,175 | — | 400,857,406 | |||||||||||||||||||
| Ultra DJ-UBS Commodity | 6,240,951 | — | — | — | (306,268 | ) | 5,934,683 | ||||||||||||||||||
| Ultra DJ-UBS Crude Oil | 437,662,650 | 21,960,410 | — | — | 33,333,620 | 492,956,680 | |||||||||||||||||||
| Ultra DJ-UBS Natural Gas | 64,313,224 | (3,816,950 | ) | — | — | — | 60,496,274 | ||||||||||||||||||
| Ultra Gold | 350,624,904 | (15,240 | ) | (15,652,058 | ) | — | — | 334,957,606 | |||||||||||||||||
| Ultra Silver | 891,057,386 | (40,020 | ) | (145,740,706 | ) | — | — | 745,276,660 | |||||||||||||||||
| Ultra Australian Dollar | 3,570,894 | (99,030 | ) | — | — | — | 3,471,864 | ||||||||||||||||||
| Ultra Euro | 4,546,944 | — | — | 87,159 | — | 4,634,103 | |||||||||||||||||||
| Ultra Yen | 4,587,918 | — | — | (494,296 | ) | — | 4,093,622 | ||||||||||||||||||
| VIX Short-Term Futures ETF | 144,060,921 | (221,419 | ) | — | — | — | 143,839,502 | ||||||||||||||||||
| VIX Mid-Term Futures ETF | 79,930,866 | (1,470,410 | ) | — | — | — | 78,460,456 | ||||||||||||||||||
| Ultra VIX Short-Term Futures ETF | 97,440,843 | 2,057,062 | — | — | 301,351 | 99,799,256 | |||||||||||||||||||
| Short VIX Short-Term Futures ETF | 53,686,352 | (1,387,175 | ) | — | — | — | 52,299,177 | ||||||||||||||||||
| Total Trust | $ | 3,335,285,580 | $ | 13,432,436 | $ | (138,355,223 | ) | $ | 24,559,466 | $ | 27,870,145 | $ | 3,262,792,404 | ||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||||||||||
| At December 31, 2012, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. | |||||||||||||||||||||||||
| The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. | |||||||||||||||||||||||||
| Investment Transactions and Related Income | |||||||||||||||||||||||||
| Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized appreciation/depreciation on open contracts are reflected in the Statements of Financial Condition and changes in the unrealized appreciation/depreciation between periods are reflected in the Statements of Operations. Discounts on short-term securities purchased are amortized and reflected as Interest Income in the Statements of Operations. | |||||||||||||||||||||||||
| Brokerage Commissions and Fees | |||||||||||||||||||||||||
| Each Fund pays its respective brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities for each Fund’s investment in U.S. Commodity Futures Trading Commission (“CFTC”) regulated investments. The effects of trading spreads, financing costs/fees associated with Financial Instruments, and costs relating to the purchase of U.S. Treasury securities or similar high credit quality short-term fixed-income or similar securities would also be borne by the Funds. Brokerage commissions on futures contracts are recognized on a half-turn basis (e.g., the first half is recognized when the contract is purchased (opened) and the second half is recognized when the transaction is closed). For the nine months ended September 30, 2013 and 2012, the Sponsor paid, and is currently paying, brokerage commissions on VIX futures contracts for the Matching VIX Funds. | |||||||||||||||||||||||||
| Federal Income Tax | |||||||||||||||||||||||||
| Each Fund is registered as a series of a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, no Fund expects to incur U.S. federal income tax liability; rather, each beneficial owner of a Fund’s Shares is required to take into account its allocable share of its Fund’s income, gain, loss, deductions and other items for its Fund’s taxable year ending with or within the beneficial owner’s taxable year. | |||||||||||||||||||||||||
| Management of the Funds has reviewed all open tax years and major jurisdictions (i.e., the last four tax year ends and the interim tax period since then, as applicable) and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Funds are also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management will monitor its tax positions taken under the interpretation to determine if adjustments to conclusions are necessary based on factors including, but not limited to, on-going analysis of tax law, regulation, and interpretations thereof. | |||||||||||||||||||||||||
Investments
| Investments | 9 Months Ended | ||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||
| Investments Debt And Equity Securities [Abstract] | ' | ||||||||||||||||
| Investments | ' | ||||||||||||||||
| NOTE 3 – INVESTMENTS | |||||||||||||||||
| Short-Term Investments | |||||||||||||||||
| The Funds may purchase U.S. Treasury Bills, agency securities, and other high-credit quality short-term fixed income or similar securities with original maturities of one year or less. A portion of these investments may be posted as collateral in connection with swap agreements and/or used as collateral for a Fund’s trading in futures and forward contracts. | |||||||||||||||||
| Accounting for Derivative Instruments | |||||||||||||||||
| In seeking to achieve each Fund’s investment objective, the Sponsor uses a mathematical approach to investing. Using this approach, the Sponsor determines the type, quantity and mix of investment positions, including derivative positions, which the Sponsor believes in combination, should produce returns consistent with a Fund’s objective. | |||||||||||||||||
| All open derivative positions at period-end for each Fund are disclosed in the Schedule of Investments and the notional value of these open positions relative to the shareholders’ equity of each Fund is generally representative of the notional value of open positions to shareholders’ equity throughout the reporting period for each respective Fund. The volume associated with derivative positions varies on a daily basis as each Fund transacts derivative contracts in order to achieve the appropriate exposure, as expressed in notional value, in comparison to shareholders’ equity consistent with each Fund’s investment objective. | |||||||||||||||||
| Following is a description of the derivative instruments used by the Funds during the reporting period, including the primary underlying risk exposures related to each instrument type. | |||||||||||||||||
| Futures Contracts | |||||||||||||||||
| The Funds enter into futures contracts to gain exposure to changes in the value of, or as a substitute for investing directly in (or shorting), an underlying index, currency or commodity. A futures contract obligates the seller to deliver (and the purchaser to accept) the future delivery of a specified quantity and type of asset at a specified time and place. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity, if applicable, or by making an offsetting sale or purchase of an identical futures contract on the same or linked exchange before the designated date of delivery, or by cash settlement at expiration of contract. | |||||||||||||||||
| Upon entering into a futures contract, each Fund is required to deposit and maintain as collateral at least such initial margin as required by the exchange on which the transaction is effected. The initial margin is segregated as cash balances with brokers for futures contracts, as disclosed in the Statements of Financial Condition, and is restricted as to its use. The Funds that enter into futures contracts maintain collateral at the broker in the form of cash. Pursuant to the futures contract, each Fund generally agrees to receive from or pay to the broker(s) an amount of cash equal to the daily fluctuation in value of the futures contract. Such receipts or payments are known as variation margin and are recorded by each Fund as unrealized gains or losses. Each Fund will realize a gain or loss upon closing of a futures transaction. | |||||||||||||||||
| Futures contracts involve, to varying degrees, elements of market risk (specifically commodity price risk or equity market volatility risk) and exposure to loss in excess of the amount of variation margin. The face or contract amounts reflect the extent of the total exposure each Fund has in the particular classes of instruments. Additional risks associated with the use of futures contracts are imperfect correlation between movements in the price of the futures contracts and the market value of the underlying index or commodity and the possibility of an illiquid market for a futures contract. With futures contracts, there is minimal but some counterparty risk to the Funds since futures contracts are exchange-traded and the exchange’s clearinghouse, as counterparty to all exchange-traded futures contracts, guarantees the futures contracts against default. Many futures exchanges and boards of trade limit the amount of fluctuation permitted in futures contract prices during a single trading day. Once the daily limit has been reached in a particular contract, no trades may be made that day at a price beyond that limit or trading may be suspended for specified times during the trading day. Futures contracts prices could move to the limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of futures positions and potentially subjecting a Fund to substantial losses. If trading is not possible, or if a Fund determines not to close a futures position in anticipation of adverse price movements, the Fund will be required to make daily cash payments of variation margin. The risk the Fund will be unable to close out a futures position will be minimized by entering into such transactions on a national exchange with an active and liquid secondary market. | |||||||||||||||||
| Swap Agreements | |||||||||||||||||
| Certain of the Funds enter into swap agreements for purposes of pursuing their investment objectives or as a substitute for investing directly in (or shorting) an underlying index, currency or commodity, or to create an economic hedge against a position. Swap agreements are two-party contracts that have traditionally been entered into primarily with institutional investors in over-the-counter (“OTC”) markets for a specified period, ranging from a day to more than one year. However, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) provides for significant reforms of the OTC derivative markets, including a requirement to execute certain swap and forward transactions on a CFTC-regulated market and/or to clear such transactions through a CFTC-regulated central clearing organization. In a standard swap transaction, two parties agree to exchange the returns earned or realized on a particular predetermined investment, instrument or index in exchange for a fixed or floating rate of return in respect of a predetermined notional amount. In the case of futures contracts based indices, such as those used by the Commodity Index Funds and the VIX Funds, the reference interest rate is zero. Transaction or commission costs are reflected in the benchmark level at which the transaction is entered into. The gross returns to be exchanged are calculated with respect to a notional amount and the benchmark returns to which the swap is linked. Swap agreements do not involve the delivery of underlying instruments. | |||||||||||||||||
| Generally, swap agreements entered into by the Funds calculate and settle the obligations of the parties to the agreement on a “net basis” with a single payment. Consequently, each Fund’s current obligations (or rights) under a swap agreement will generally be equal only to the net amount to be paid or received under the agreement based on the relative values of such obligations (or rights) (the “net amount”). In a typical swap agreement entered into by a Matching VIX Fund or an Ultra Fund, the Matching VIX Fund or Ultra Fund would be entitled to settlement payments in the event the benchmark increases and would be required to make payments to the swap counterparties in the event the benchmark decreases, adjusted for any transaction costs or trading spreads on the notional amount the Funds may pay. In a typical swap agreement entered into by a Short Fund or an UltraShort Fund, the Short Fund or UltraShort Fund would be required to make payments to the swap counterparties in the event the benchmark increases and would be entitled to settlement payments in the event the benchmark decreases, adjusted for any transaction costs or trading spreads on the notional amount the Funds may pay. | |||||||||||||||||
| The net amount of the excess, if any, of each Fund’s obligations over its entitlements with respect to each uncleared swap agreement is accrued on a daily basis and an amount of cash and/or securities having an aggregate value at least equal to such accrued excess is maintained for the benefit of the counterparty in a segregated account by the Funds’ Custodian. The net amount of the excess, if any, of each Fund’s entitlements over its obligations with respect to each uncleared swap agreement is accrued on a daily basis and an amount of cash and/or securities having an aggregate value at least equal to such accrued excess is maintained for the benefit of the Fund in a segregated account by the Fund’s Custodian. Until a swap agreement is settled in cash, the gain or loss on the notional amount less any transaction costs or trading spreads payable by each Fund on the notional amount are recorded as “unrealized appreciation or depreciation on swap agreements” and, when cash is exchanged, the gain or loss realized is recorded as “realized gains or losses on swap agreements.” Swap agreements are generally valued at the last settled price of the benchmark referenced asset. | |||||||||||||||||
| The Trust, on behalf of a Fund, may enter into agreements with certain counterparties for derivative transactions. These agreements contain various conditions, events of default, termination events, covenants and representations. The triggering of certain events or the default on certain terms of the agreement could allow a party to terminate a transaction under the agreement and request immediate payment in an amount equal to the net positions owed the party under the agreement. This could cause a Fund to have to enter into a new transaction with the same counterparty, enter into a transaction with a different counterparty or seek to achieve its investment objective through any number of different investments or investment techniques. | |||||||||||||||||
| Swap agreements involve, to varying degrees, elements of market risk (commodity price risk) and exposure to loss in excess of the unrealized gain/loss reflected. The notional amounts reflect the extent of the total investment exposure each Fund has under the swap agreement, which may exceed the NAV of each Fund. Additional risks associated with the use of swap agreements are imperfect correlations between movements in the notional amount and the price of the underlying reference index and the inability of counterparties to perform. Each Fund bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. A Fund will typically enter into swap agreements only with major global financial institutions. The creditworthiness of each of the firms that is a party to a swap agreement is monitored by the Sponsor. The Sponsor may use various techniques to minimize credit risk including early termination and payment, using different counterparties, limiting the net amount due from any individual counterparty and generally requiring collateral to be posted by the counterparty in an amount approximately equal to that owed to the Funds. All of the outstanding swap agreements at September 30, 2013 contractually terminate within one month but may be terminated without penalty by either party daily. Upon termination, the Fund is entitled to pay or receive the “unrealized appreciation or depreciation” amount. | |||||||||||||||||
| The Funds, as applicable, collateralize swap agreements by segregating or designating cash and/or certain securities as indicated on the Statements of Financial Condition or Schedules of Investments. As noted above, collateral posted in connection with uncleared derivative transactions is held for the benefit of the counterparty in a segregated tri-party account at the Custodian to protect the counterparty against non-payment by the Funds. In the event of a default by the counterparty, the Funds will seek withdrawal of this collateral from the segregated account and may incur certain costs in exercising its right with respect to the collateral. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Funds may experience significant delays in obtaining any recovery in a bankruptcy or other reorganizational proceeding. The Funds may obtain only limited recovery or may obtain no recovery in such circumstances. | |||||||||||||||||
| The Funds remain subject to credit risk with respect to the amount they expect to receive from counterparties. However, the Funds have sought to mitigate these risks in connection with uncleared swaps by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes the Fund, subject to certain minimum thresholds. In the event of the bankruptcy of a counterparty, the Fund will have direct access to the collateral received from the counterparty, generally as of the day prior to the bankruptcy, because there is a one day time lag between the Fund’s request for collateral and the delivery of such collateral. To the extent any such collateral is insufficient, the Funds will be exposed to counterparty risk as described above, including the possible delays in recovering amounts as a result of bankruptcy proceedings. As of September 30, 2013, the collateral posted by counterparties consisted of cash and U.S. Treasury Securities. | |||||||||||||||||
| The counterparty/credit risk for cleared derivative transactions is generally lower than for uncleared OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations. In addition, cleared derivative transactions benefit from daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. | |||||||||||||||||
| Forward Contracts | |||||||||||||||||
| Certain of the Funds enter into forward contracts for purposes of pursuing their investment objectives and as a substitute for investing directly in (or shorting) commodities and/or currencies. A forward contract is an agreement between two parties to purchase or sell a specified quantity of an asset at or before a specified date in the future at a specified price. Forward contracts are typically traded in the OTC markets and all details of the contract are negotiated between the counterparties to the agreement. Accordingly, the forward contracts are valued by reference to the contracts traded in the OTC markets. | |||||||||||||||||
| The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity or currency, establishing an opposite position in the contract and recognizing the profit or loss on both positions simultaneously on the delivery date or, in some instances, paying a cash settlement before the designated date of delivery. The forward contracts are adjusted by the daily fluctuation of the underlying commodity or currency and any gains or losses are recorded for financial statement purposes as unrealized gains or losses until the contract settlement date. | |||||||||||||||||
| Forward contracts have traditionally not been cleared or guaranteed by a third party. However, the Dodd-Frank Act provides for significant reforms of the OTC derivatives markets, including a requirement to execute most forward contracts on a CFTC-regulated market and/or to clear such transactions through a CFTC-regulated central clearing organization. The Funds may collateralize uncleared forward commodity contracts by segregating or designating cash and/or certain securities as indicated on their Statements of Financial Condition or Schedules of Investments. Such collateral is held for the benefit of the counterparty in a segregated tri-party account at the Custodian to protect the counterparty against non-payment by the Funds. In the event of a default by the counterparty, the Funds will seek withdrawal of this collateral from the segregated account and may incur certain costs in exercising its right with respect to the collateral. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Funds may experience significant delays in obtaining any recovery in a bankruptcy or other reorganizational proceeding. The Funds may obtain only limited recovery or may obtain no recovery in such circumstances. | |||||||||||||||||
| The Funds remain subject to credit risk with respect to the amount they expect to receive from counterparties. However, the Funds have sought to mitigate these risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes a Fund, subject to minimum thresholds. In the event of the bankruptcy of a counterparty, the Fund will have direct access to the collateral received from the counterparty, generally as of the day prior to the bankruptcy, because there is a one day time lag between the Fund’s request for collateral and the delivery of such collateral. To the extent any such collateral is insufficient, the Fund will be exposed to counterparty risk as described above, including the possible delays in recovering amounts as a result of bankruptcy proceedings. As of September 30, 2013, the collateral posted by counterparties consisted of cash and U.S. Treasury Securities. | |||||||||||||||||
| Participants in trading foreign exchange forward contracts often do not require margin deposits, but rely upon internal credit limitations and their judgments regarding the creditworthiness of their counterparties. In recent years, however, many OTC market participants in foreign exchange trading have begun to require their counterparties to post margin. | |||||||||||||||||
| A Fund will typically enter into forward contracts only with major global financial institutions. The creditworthiness of each of the firms that is a party to a forward contract is monitored by the Sponsor. | |||||||||||||||||
| The counterparty/credit risk for cleared derivative transactions is generally lower than for uncleared OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations. In addition, cleared derivative transactions benefit from daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. | |||||||||||||||||
| Fair Value of Derivative Instruments | |||||||||||||||||
| as of September 30, 2013 | |||||||||||||||||
| Asset Derivatives | Liability Derivatives | ||||||||||||||||
| Derivatives not accounted | Statements | Fund | Unrealized | Statements of | Fund | Unrealized | |||||||||||
| for as hedging instruments | of | Appreciation | Financial | Depreciation | |||||||||||||
| Financial | Condition | ||||||||||||||||
| Condition | Location | ||||||||||||||||
| Location | |||||||||||||||||
| Commodities Contracts | Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 200,128 | Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements | ProShares UltraShort Gold | $ | 9,400 | * | ||||||||
| ProShares UltraShort Silver | 2,180 | * | |||||||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | 43,404,803 | * | |||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 467,284 | * | ProShares Ultra DJ-UBS Commodity | 237,372 | |||||||||||||
| ProShares UltraShort Gold | 7,782,450 | ProShares Ultra DJ-UBS Crude Oil | 13,705,785 | * | |||||||||||||
| ProShares UltraShort Silver | 9,083,114 | ProShares Ultra Gold | 17,189,960 | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | 3,434,395 | * | ProShares Ultra Silver | 80,087,349 | |||||||||||||
| ProShares Ultra Gold | 9,420 | * | |||||||||||||||
| ProShares Ultra Silver | 2,180 | * | |||||||||||||||
| Foreign Exchange Contracts | Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts | ProShares UltraShort Euro | 1,643,765 | Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts | ProShares Short Euro | 141,094 | * | ||||||||||
| ProShares UltraShort Yen | 793,507 | ProShares UltraShort Australian Dollar | 466,612 | * | |||||||||||||
| ProShares Ultra Australian Dollar | 70,124 | * | ProShares UltraShort Euro | 27,575,831 | |||||||||||||
| ProShares UltraShort Yen | 13,313,050 | ||||||||||||||||
| ProShares Ultra Euro | 198,744 | ||||||||||||||||
| ProShares Ultra Yen | 78,715 | ProShares Ultra Euro | 8,271 | ||||||||||||||
| ProShares Ultra Yen | 3,220 | ||||||||||||||||
| VIX Futures Contracts | Receivables on open futures contracts | ProShares VIX Short-Term | 3,316,326 | * | Payable on open futures contracts | ProShares VIX Short-Term Futures ETF | 96,120 | * | |||||||||
| Futures ETF | |||||||||||||||||
| ProShares VIX Mid-Term Futures ETF | 271,990 | * | ProShares VIX Mid-Term Futures ETF | 1,002,610 | * | ||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | 12,992,694 | * | ProShares Short VIX Short-Term Futures ETF | 3,449,929 | * | ||||||||||||
| Total Trust | $ | 83,749,639* | Total Trust | $ | 157,288,783* | ||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||
| Fair Value of Derivative Instruments | |||||||||||||||||
| as of December 31, 2012 | |||||||||||||||||
| Asset Derivatives | Liability Derivatives | ||||||||||||||||
| Derivatives not accounted | Statements | Fund | Unrealized | Statements of | Fund | Unrealized | |||||||||||
| for as hedging instruments | of | Appreciation | Financial | Depreciation | |||||||||||||
| Financial | Condition | ||||||||||||||||
| Condition | Location | ||||||||||||||||
| Location | |||||||||||||||||
| Commodities Contracts | Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 148,502 | Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements | ProShares UltraShort DJ-UBS Crude Oil | $ | 9,636,781* | |||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 409,135 | * | ProShares Ultra DJ-UBS Commodity | 306,268 | |||||||||||||
| ProShares UltraShort Gold | 3,745,096 | * | ProShares Ultra DJ-UBS Natural Gas | 3,816,950 | * | ||||||||||||
| ProShares UltraShort Silver | 19,347,705 | * | ProShares Ultra Gold | 15,667,298 | * | ||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 55,294,030 | * | ProShares Ultra Silver | 145,780,726 | * | ||||||||||||
| Foreign Exchange Contracts | Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts | ProShares UltraShort | 85,590 | * | Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts | ProShares Short Euro | 55,056 | * | |||||||||
| Australian Dollar | |||||||||||||||||
| ProShares UltraShort Euro | 251,047 | ProShares UltraShort Euro | 13,398,619 | ||||||||||||||
| ProShares UltraShort Yen | 38,346,817 | ProShares UltraShort Yen | 232,642 | ||||||||||||||
| ProShares Ultra Euro | 89,473 | ProShares Ultra Australian Dollar | 99,030 | * | |||||||||||||
| ProShares Ultra Yen | 13,523 | ProShares Ultra Euro | 2,314 | ||||||||||||||
| ProShares Ultra Yen | 507,819 | ||||||||||||||||
| VIX Futures Contracts | Receivables on open futures contracts, unrealized appreciation on swap agreements | ProShares VIX Short-Term Futures ETF | 2,368,824 | * | Payable on open futures contracts, unrealized depreciation on swap agreements | ProShares VIX Short-Term Futures ETF | 2,590,243 | * | |||||||||
| ProShares VIX Mid-Term Futures ETF | 233,160 | * | ProShares VIX Mid-Term Futures ETF | 1,703,570 | * | ||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | 4,034,873 | * | ProShares Ultra VIX Short-Term Futures ETF | 1,676,460 | * | ||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 627,059 | * | ProShares Short VIX Short-Term Futures ETF | 2,014,234 | * | ||||||||||||
| Total Trust | $ | 124,994,834 | * | Total Trust | $ | 197,488,010 | * | ||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the three months ended September 30, 2013 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | (Loss) on Derivatives | on Derivatives | Appreciation or | ||||||||||||||
| Recognized in Income | Recognized in Income | Depreciation on | |||||||||||||||
| Derivatives Recognized in | |||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in | ProShares UltraShort DJ-UBS Commodity | $ | 13,664 | $ | (212,120 | ) | ||||||||||
| unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Crude Oil | (86,184,111 | ) | 44,663,321 | |||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 2,862,705 | (1,862,190 | ) | ||||||||||||||
| ProShares UltraShort Gold | 6,021,147 | (44,053,880 | ) | ||||||||||||||
| ProShares UltraShort Silver | 6,003,481 | (32,088,651 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Commodity | (85,078 | ) | 233,903 | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 53,589,084 | (18,204,607 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | (14,491,916 | ) | 9,380,633 | ||||||||||||||
| ProShares Ultra Gold | (5,910,890 | ) | 36,566,124 | ||||||||||||||
| ProShares Ultra Silver | 28,400,072 | 96,489,190 | |||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in | ProShares Short Euro | (39,024 | ) | (208,707 | ) | |||||||||||
| unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort Australian Dollar | 389,254 | (1,865,253 | ) | |||||||||||||
| ProShares UltraShort Euro | (8,625,860 | ) | (30,678,790 | ) | |||||||||||||
| ProShares UltraShort Yen | (5,693,424 | ) | (8,391,457 | ) | |||||||||||||
| ProShares Ultra Australian Dollar | (123,128 | ) | 277,231 | ||||||||||||||
| ProShares Ultra Euro | 41,105 | 227,504 | |||||||||||||||
| ProShares Ultra Yen | (20,255 | ) | 65,431 | ||||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts/changes in unrealized appreciation/depreciation on futures contracts | ProShares VIX Short-Term Futures ETF | (58,627,489 | ) | 1,983,669 | ||||||||||||
| ProShares VIX Mid-Term Futures ETF | (6,929,719 | ) | (6,313,054 | ) | |||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (197,375,157 | ) | 9,751,723 | ||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 37,631,293 | (2,816,258 | ) | ||||||||||||||
| Total Trust | $ | (249,154,246 | ) | $ | 52,943,762 | ||||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the three months ended September 30, 2012 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | (Loss) on Derivatives | on Derivatives | Appreciation or | ||||||||||||||
| Recognized in Income | Recognized in Income | Depreciation on | |||||||||||||||
| Derivatives Recognized in | |||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in | ProShares UltraShort DJ-UBS Commodity | $ | (861,786 | ) | $ | 206,641 | ||||||||||
| unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Crude Oil | (24,455,424 | ) | 10,033,896 | |||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | (4,766,026 | ) | 1,018,440 | ||||||||||||||
| ProShares UltraShort Gold | (10,990,296 | ) | (13,890,127 | ) | |||||||||||||
| ProShares UltraShort Silver | (30,586,333 | ) | (36,561,134 | ) | |||||||||||||
| ProShares Ultra DJ-UBS Commodity | 1,946,086 | (418,834 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 93,595,260 | (32,720,374 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | 20,880,016 | (5,822,190 | ) | ||||||||||||||
| ProShares Ultra Gold | 23,189,203 | 47,317,620 | |||||||||||||||
| ProShares Ultra Silver | 159,543,701 | 205,647,219 | |||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on foreign currency forward and futures contracts/changes in | ProShares Short Euro | (102,555 | ) | 36,694 | ||||||||||||
| unrealized appreciation/ depreciation on foreign | ProShares UltraShort | (123,485 | ) | 1,140 | |||||||||||||
| currency forward and futures contracts | Australian Dollar | ||||||||||||||||
| ProShares UltraShort Euro | (14,572,815 | ) | (12,582,909 | ) | |||||||||||||
| ProShares UltraShort Yen | (4,756,665 | ) | (6,717,569 | ) | |||||||||||||
| ProShares Ultra | 99,030 | (1,930 | ) | ||||||||||||||
| Australian Dollar | |||||||||||||||||
| ProShares Ultra Euro | 55,097 | 100,337 | |||||||||||||||
| ProShares Ultra Yen | 90,137 | 146,755 | |||||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation/ depreciation on futures contracts and swap agreements | ProShares VIX Short-Term Futures ETF | (85,611,502 | ) | 13,014,580 | ||||||||||||
| ProShares VIX Mid-Term Futures ETF | (19,925,729 | ) | (7,586,879 | ) | |||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (299,188,874 | ) | 39,590,749 | ||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 10,269,196 | (146,485 | ) | ||||||||||||||
| Total Trust | $ | (186,273,764 | ) | $ | 200,665,640 | ||||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the nine months ended September 30, 2013 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | (Loss) on Derivatives | on Derivatives | Appreciation or | ||||||||||||||
| Recognized in Income | Recognized in Income | Depreciation on | |||||||||||||||
| Derivatives Recognized in | |||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 472,331 | $ | 51,626 | |||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | (91,283,615 | ) | 53,041,584 | ||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 254,565 | 58,149 | |||||||||||||||
| ProShares UltraShort Gold | 39,762,664 | 4,027,954 | |||||||||||||||
| ProShares UltraShort Silver | 86,823,320 | (10,266,771 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Commodity | (868,053 | ) | 68,896 | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 140,887,078 | (68,999,815 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | 410,025 | 7,251,345 | |||||||||||||||
| ProShares Ultra Gold | (124,334,744 | ) | (1,513,242 | ) | |||||||||||||
| ProShares Ultra Silver | (509,899,199 | ) | 65,695,557 | ||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares Short Euro | (114,962 | ) | (86,038 | ) | |||||||||||
| ProShares UltraShort Australian Dollar | 2,294,351 | (552,202 | ) | ||||||||||||||
| ProShares UltraShort Euro | (19,722,590 | ) | (12,784,494 | ) | |||||||||||||
| ProShares UltraShort Yen | 139,331,278 | (50,633,718 | ) | ||||||||||||||
| ProShares Ultra Australian Dollar | (863,033 | ) | 169,154 | ||||||||||||||
| ProShares Ultra Euro | 12,734 | 103,314 | |||||||||||||||
| ProShares Ultra Yen | (1,694,827 | ) | 569,791 | ||||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation/depreciation on futures contracts | ProShares VIX Short-Term Futures ETF | (102,880,094 | ) | 3,441,625 | ||||||||||||
| ProShares VIX Mid-Term Futures ETF | (19,676,804 | ) | 739,790 | ||||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (302,301,436 | ) | 10,634,281 | ||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 58,706,439 | (2,062,754 | ) | ||||||||||||||
| Total Trust | $ | (704,684,572 | ) | $ | (1,045,968 | ) | |||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the nine months ended September 30, 2012 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | (Loss) on Derivatives | on Derivatives | Appreciation or | ||||||||||||||
| Recognized in Income | Recognized in Income | Depreciation on | |||||||||||||||
| Derivatives Recognized in | |||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 653,141 | $ | (684,284 | ) | ||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | 26,044,945 | 4,442,707 | |||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 1,537,148 | (4,183,090 | ) | ||||||||||||||
| ProShares UltraShort Gold | (9,278,044 | ) | (42,573,500 | ) | |||||||||||||
| ProShares UltraShort Silver | (27,207,872 | ) | (57,618,849 | ) | |||||||||||||
| ProShares Ultra DJ-UBS Commodity | (234,500 | ) | 974,662 | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | (3,020,461 | ) | (7,248,434 | ) | |||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | (5,782,759 | ) | 13,594,580 | ||||||||||||||
| ProShares Ultra Gold | (27,072,137 | ) | 111,555,849 | ||||||||||||||
| ProShares Ultra Silver | (51,743,422 | ) | 269,693,740 | ||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on foreign currency forward and futures contracts/changes in unrealized appreciation/depreciation on foreign currency forward and futures contracts | ProShares Short Euro | (104,555 | ) | (13,619 | ) | |||||||||||
| ProShares UltraShort | (123,485 | ) | 1,140 | ||||||||||||||
| Australian Dollar | |||||||||||||||||
| ProShares UltraShort Euro | 106,381,285 | (102,605,174 | ) | ||||||||||||||
| ProShares UltraShort Yen | 5,696,143 | 1,720,295 | |||||||||||||||
| ProShares Ultra | 99,030 | (1,930 | ) | ||||||||||||||
| Australian Dollar | |||||||||||||||||
| ProShares Ultra Euro | (811,701 | ) | 740,490 | ||||||||||||||
| ProShares Ultra Yen | (131,047 | ) | (56,350 | ) | |||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation/ depreciation on futures contracts and swap agreements | ProShares VIX Short-Term Futures ETF | (137,705,726 | ) | (3,298,001 | ) | |||||||||||
| ProShares VIX Mid-Term Futures ETF | (45,669,199 | ) | (7,611,689 | ) | |||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (477,920,473 | ) | (19,836,074 | ) | |||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 14,345,508 | 439,437 | |||||||||||||||
| Total Trust | $ | (632,048,181 | ) | $ | 157,431,906 | ||||||||||||
| Offsetting Assets and Liabilities | |||||||||||||||||
| Effective January 1, 2013, the Funds adopted Accounting Standards Update (“ASU”) No. 2011-11 “Disclosures about Offsetting Assets and Liabilities” which was subsequently clarified in ASU 2013-01 “Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities”. The amended standard requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. | |||||||||||||||||
| As described in Note 3, the Funds utilize derivative instruments to achieve each Fund’s investment objective. The amounts shown in the Statement of Financial Condition do not take into consideration the effects of legally enforceable master netting agreements. The following tables present the gross and net amounts of these assets and liabilities with any offsets to reflect the Funds’ ability to reflect the master netting agreements at September 30, 2013 and December 31, 2012: | |||||||||||||||||
| ProShares UltraShort DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 200,128 | $ | — | $ | 200,128 | |||||||||||
| Total | $ | 200,128 | $ | — | $ | 200,128 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 71,108 | $ | — | $ | — | $ | 71,108 | |||||||||
| Goldman Sachs International | $ | 100,420 | — | — | 100,420 | ||||||||||||
| UBS AG | 28,600 | — | — | 28,600 | |||||||||||||
| Total | $ | 200,128 | $ | — | $ | — | $ | 200,128 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 2,100,651 | $ | — | $ | 2,100,651 | |||||||||||
| Swap agreements | 34,688,207 | — | 34,688,207 | ||||||||||||||
| Total | $ | 36,788,858 | $ | — | $ | 36,788,858 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 10,374,607 | $ | — | $ | (9,400,000 | ) | $ | 974,607 | ||||||||
| Goldman Sachs & Co. | 2,100,651 | — | — | 2,100,651 | |||||||||||||
| Goldman Sachs International | 8,780,104 | (7,893,840 | ) | — | 886,264 | ||||||||||||
| Societe Generale S.A. | 5,485,866 | (5,485,866 | ) | — | — | ||||||||||||
| UBS AG | 10,047,630 | (9,268,674 | ) | — | 778,956 | ||||||||||||
| Total | $ | 36,788,858 | $ | (22,648,380 | ) | $ | (9,400,000 | ) | $ | 4,740,478 | |||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 45,312 | $ | — | $ | 45,312 | |||||||||||
| Total | $ | 45,312 | $ | — | $ | 45,312 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 45,312 | $ | — | $ | — | $ | 45,312 | |||||||||
| Total | $ | 45,312 | $ | — | $ | — | $ | 45,312 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Gold | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 7,782,450 | $ | — | $ | 7,782,450 | |||||||||||
| Futures contracts* | 2,440 | — | 2,440 | ||||||||||||||
| Total | $ | 7,784,890 | $ | — | $ | 7,784,890 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 4,474,464 | $ | — | $ | (2,850,000 | ) | $ | 1,624,464 | ||||||||
| Goldman Sachs & Co. | 2,440 | — | — | 2,440 | |||||||||||||
| Goldman Sachs International | 1,765,604 | (1,411,185 | ) | — | 354,419 | ||||||||||||
| Societe Generale S.A. | 935,071 | (935,071 | ) | — | — | ||||||||||||
| UBS AG | 607,311 | (607,311 | ) | — | — | ||||||||||||
| Total | $ | 7,784,890 | $ | (2,953,567 | ) | $ | (2,850,000 | ) | $ | 1,981,323 | |||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Silver | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 9,083,114 | $ | — | $ | 9,083,114 | |||||||||||
| Futures contracts* | 580 | — | 580 | ||||||||||||||
| Total | $ | 9,083,694 | $ | — | $ | 9,083,694 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 5,461,114 | $ | — | $ | (5,461,114 | ) | $ | — | ||||||||
| Goldman Sachs & Co. | 580 | — | — | 580 | |||||||||||||
| Goldman Sachs International | 1,249,680 | (1,249,680 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 1,810,591 | (1,810,591 | ) | — | — | ||||||||||||
| UBS AG | 561,729 | (561,729 | ) | — | — | ||||||||||||
| Total | $ | 9,083,694 | $ | (3,622,000 | ) | $ | (5,461,114 | ) | $ | 580 | |||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Short Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in | |||||||||||||||
| Financial Condition | the Statement | ||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 3,225 | $ | — | $ | 3,225 | |||||||||||
| Total | $ | 3,225 | $ | — | $ | 3,225 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 3,225 | $ | — | $ | (3,225 | ) | $ | — | ||||||||
| Total | $ | 3,225 | $ | — | $ | (3,225 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Australian Dollar | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 36,330 | $ | — | $ | 36,330 | |||||||||||
| Total | $ | 36,330 | $ | — | $ | 36,330 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 36,330 | $ | — | $ | (36,330 | ) | $ | — | ||||||||
| Total | $ | 36,330 | $ | — | $ | (36,330 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 1,643,765 | $ | — | $ | 1,643,765 | |||||||||||
| Total | $ | 1,643,765 | $ | — | $ | 1,643,765 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 1,060,483 | $ | — | $ | — | $ | 1,060,483 | |||||||||
| UBS AG | 583,282 | — | — | 583,282 | |||||||||||||
| Total | $ | 1,643,765 | $ | — | $ | — | $ | 1,643,765 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 27,575,831 | $ | — | $ | 27,575,831 | |||||||||||
| Total | $ | 27,575,831 | $ | — | $ | 27,575,831 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 13,695,213 | $ | (13,695,213 | ) | $ | — | $ | — | ||||||||
| UBS AG | 13,880,618 | (13,880,618 | ) | — | — | ||||||||||||
| Total | $ | 27,575,831 | $ | (27,575,831 | ) | $ | — | $ | — | ||||||||
| ProShares UltraShort Yen | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 793,507 | $ | — | $ | 793,507 | |||||||||||
| Total | $ | 793,507 | $ | — | $ | 793,507 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 718,095 | $ | — | $ | — | $ | 718,095 | |||||||||
| UBS AG | 75,412 | — | — | 75,412 | |||||||||||||
| Total | $ | 793,507 | $ | — | $ | — | $ | 793,507 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 13,313,050 | $ | — | $ | 13,313,050 | |||||||||||
| Total | $ | 13,313,050 | $ | — | $ | 13,313,050 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 7,048,993 | $ | (7,048,993 | ) | $ | — | $ | — | ||||||||
| UBS AG | 6,264,057 | (6,264,057 | ) | — | — | ||||||||||||
| Total | $ | 13,313,050 | $ | (13,313,050 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 237,372 | $ | — | $ | 237,372 | |||||||||||
| Total | $ | 237,372 | $ | — | $ | 237,372 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 73,556 | $ | (73,556 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs International | 113,209 | (113,209 | ) | — | — | ||||||||||||
| UBS AG | 50,607 | (50,607 | ) | — | — | ||||||||||||
| Total | $ | 237,372 | $ | (237,372 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 772,970 | $ | — | $ | 772,970 | |||||||||||
| Swap agreements | 10,995,019 | — | 10,995,019 | ||||||||||||||
| Total | $ | 11,767,989 | $ | — | $ | 11,767,989 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 2,428,302 | $ | (2,428,302 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs & Co. | 772,970 | — | (772,970 | ) | — | ||||||||||||
| Goldman Sachs International | 3,504,152 | (3,504,152 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 1,910,928 | (1,910,928 | ) | — | — | ||||||||||||
| UBS AG | 3,151,637 | (3,151,637 | ) | — | — | ||||||||||||
| Total | $ | 11,767,989 | $ | (10,995,019 | ) | $ | (772,970 | ) | $ | — | |||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 1,999,143 | $ | — | $ | 1,999,143 | |||||||||||
| Total | $ | 1,999,143 | $ | — | $ | 1,999,143 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 1,999,143 | $ | — | $ | (1,999,143 | ) | $ | — | ||||||||
| Total | $ | 1,999,143 | $ | — | $ | (1,999,143 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Gold | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 17,189,960 | $ | — | $ | 17,189,960 | |||||||||||
| Futures contracts* | 2,440 | — | 2,440 | ||||||||||||||
| Total | $ | 17,192,400 | $ | — | $ | 17,192,400 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 9,410,748 | $ | (9,410,748 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs & Co. | $ | 2,440 | — | (2,440 | ) | — | |||||||||||
| Goldman Sachs International | 4,079,114 | (4,079,114 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 2,180,790 | (2,180,790 | ) | — | — | ||||||||||||
| UBS AG | 1,519,308 | (1,519,308 | ) | — | — | ||||||||||||
| Total | $ | 17,192,400 | $ | (17,189,960 | ) | $ | (2,440 | ) | $ | — | |||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Silver | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 80,087,349 | $ | — | $ | 80,087,349 | |||||||||||
| Futures contracts* | 1,780 | — | 1,780 | ||||||||||||||
| Total | $ | 80,089,129 | $ | — | $ | 80,089,129 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 40,058,378 | $ | (40,058,378 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs & Co. | 1,780 | — | (1,780 | ) | — | ||||||||||||
| Goldman Sachs International | 24,037,958 | (24,037,958 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 11,898,455 | (11,898,455 | ) | — | — | ||||||||||||
| UBS AG | 4,092,558 | (4,092,558 | ) | — | — | ||||||||||||
| Total | $ | 80,089,129 | $ | (80,087,349 | ) | $ | (1,780 | ) | $ | — | |||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Australian Dollar | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 5,180 | $ | — | $ | 5,180 | |||||||||||
| Total | $ | 5,180 | $ | — | $ | 5,180 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 5,180 | $ | — | $ | — | $ | 5,180 | |||||||||
| Total | $ | 5,180 | $ | — | $ | — | $ | 5,180 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 198,744 | $ | — | $ | 198,744 | |||||||||||
| Total | $ | 198,744 | $ | — | $ | 198,744 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 55,456 | $ | — | $ | — | $ | 55,456 | |||||||||
| UBS AG | 143,288 | — | — | 143,288 | |||||||||||||
| Total | $ | 198,744 | $ | — | $ | — | $ | 198,744 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 8,271 | $ | — | $ | 8,271 | |||||||||||
| Total | $ | 8,271 | $ | — | $ | 8,271 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 6,697 | $ | (6,697 | ) | $ | — | $ | — | ||||||||
| UBS AG | 1,574 | (1,574 | ) | — | — | ||||||||||||
| Total | $ | 8,271 | $ | (8,271 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra Yen | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 78,715 | $ | — | $ | 78,715 | |||||||||||
| Total | $ | 78,715 | $ | — | $ | 78,715 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 37,892 | $ | — | $ | — | $ | 37,892 | |||||||||
| UBS AG | 40,823 | — | — | 40,823 | |||||||||||||
| Total | $ | 78,715 | $ | — | $ | — | $ | 78,715 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 3,220 | $ | — | $ | 3,220 | |||||||||||
| Total | $ | 3,220 | $ | — | $ | 3,220 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 2,496 | $ | (2,496 | ) | $ | — | $ | — | ||||||||
| UBS AG | 724 | (724 | ) | — | — | ||||||||||||
| Total | $ | 3,220 | $ | (3,220 | ) | $ | — | $ | — | ||||||||
| ProShares VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 7,590,541 | $ | — | $ | 7,590,541 | |||||||||||
| Total | $ | 7,590,541 | $ | — | $ | 7,590,541 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 7,590,541 | $ | — | $ | — | $ | 7,590,541 | |||||||||
| Total | $ | 7,590,541 | $ | — | $ | — | $ | 7,590,541 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares VIX Mid-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013 | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 1,619,391 | $ | — | $ | 1,619,391 | |||||||||||
| Total | $ | 1,619,391 | $ | — | $ | 1,619,391 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 1,619,391 | $ | — | $ | — | $ | 1,619,391 | |||||||||
| Total | $ | 1,619,391 | $ | — | $ | — | $ | 1,619,391 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013 | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 30,450,046 | $ | — | $ | 30,450,046 | |||||||||||
| Total | $ | 30,450,046 | $ | — | $ | 30,450,046 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 30,450,046 | $ | — | $ | — | $ | 30,450,046 | |||||||||
| Total | $ | 30,450,046 | $ | — | $ | — | $ | 30,450,046 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013 | |||||||||||||||||
| Assets | Gross | Gross Amounts | Net Amounts | ||||||||||||||
| Amounts of | Offset in the | of Assets | |||||||||||||||
| Recognized | Statement of | Presented in | |||||||||||||||
| Assets | Financial | the | |||||||||||||||
| Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 5,707,549 | $ | — | $ | 5,707,549 | |||||||||||
| Total | $ | 5,707,549 | $ | — | $ | 5,707,549 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 5,707,549 | $ | — | $ | (5,707,549 | ) | $ | — | ||||||||
| Total | $ | 5,707,549 | $ | — | $ | (5,707,549 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 148,502 | $ | — | $ | 148,502 | |||||||||||
| Total | $ | 148,502 | $ | — | $ | 148,502 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Assets | Instruments | Received | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 104,181 | $ | — | $ | — | $ | 104,181 | |||||||||
| UBS AG | 44,321 | — | — | 44,321 | |||||||||||||
| Total | $ | 148,502 | $ | — | $ | — | $ | 148,502 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 979,336 | $ | — | $ | 979,336 | |||||||||||
| Swap agreements | 5,607,060 | — | 5,607,060 | ||||||||||||||
| Total | $ | 6,586,396 | $ | — | $ | 6,586,396 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 979,336 | $ | — | $ | (979,336 | ) | $ | — | ||||||||
| Goldman Sachs International | 1,880,292 | (1,880,292 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 1,730,366 | (1,730,366 | ) | — | — | ||||||||||||
| UBS AG | 1,996,402 | (1,996,402 | ) | — | — | ||||||||||||
| Total | $ | 6,586,396 | $ | (5,607,060 | ) | $ | (979,336 | ) | $ | — | |||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 632,777 | $ | — | $ | 632,777 | |||||||||||
| Total | $ | 632,777 | $ | — | $ | 632,777 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Assets | Instruments | Received | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 632,777 | $ | — | $ | — | $ | 632,777 | |||||||||
| Total | $ | 632,777 | $ | — | $ | — | $ | 632,777 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Gold | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 3,729,856 | $ | — | $ | 3,729,856 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 3,729,856 | $ | — | $ | 3,729,856 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 2,389,236 | $ | — | $ | (2,389,236 | ) | $ | — | ||||||||
| Goldman Sachs International | 452,059 | (452,059 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 499,264 | — | (499,264 | ) | — | ||||||||||||
| UBS AG | 389,297 | (347,541 | ) | — | 41,756 | ||||||||||||
| Total | $ | 3,729,856 | $ | (799,600 | ) | $ | (2,888,500 | ) | $ | 41,756 | |||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 3,980 | — | 3,980 | ||||||||||||||
| Total | $ | 3,980 | $ | — | $ | 3,980 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 3,980 | $ | — | $ | (3,980 | ) | $ | — | ||||||||
| Total | $ | 3,980 | $ | — | $ | (3,980 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Silver | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 19,307,685 | $ | — | $ | 19,307,685 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 19,307,685 | $ | — | $ | 19,307,685 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 10,786,801 | $ | — | $ | (10,300,000 | ) | $ | 486,801 | ||||||||
| Goldman Sachs International | 3,141,119 | (3,141,119 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 3,255,649 | — | (3,255,649 | ) | — | ||||||||||||
| UBS AG | 2,124,116 | (2,065,937 | ) | — | 58,179 | ||||||||||||
| Total | $ | 19,307,685 | $ | (5,207,056 | ) | $ | (13,555,649 | ) | $ | 544,980 | |||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 2,520 | — | 2,520 | ||||||||||||||
| Total | $ | 2,520 | $ | — | $ | 2,520 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 2,520 | $ | — | $ | (2,520 | ) | $ | — | ||||||||
| Total | $ | 2,520 | $ | — | $ | (2,520 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Short Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 6,612 | $ | — | $ | 6,612 | |||||||||||
| Total | $ | 6,612 | $ | — | $ | 6,612 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 6,612 | $ | — | $ | — | $ | 6,612 | |||||||||
| Total | $ | 6,612 | $ | — | $ | — | $ | 6,612 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Australian Dollar | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 10,950 | $ | — | $ | 10,950 | |||||||||||
| Total | $ | 10,950 | $ | — | $ | 10,950 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 10,950 | $ | — | $ | (10,950 | ) | $ | — | ||||||||
| Total | $ | 10,950 | $ | — | $ | (10,950 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 251,047 | $ | — | $ | 251,047 | |||||||||||
| Total | $ | 251,047 | $ | — | $ | 251,047 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 251,047 | $ | — | $ | — | $ | 251,047 | |||||||||
| Total | $ | 251,047 | $ | — | $ | — | $ | 251,047 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 13,398,619 | $ | — | $ | 13,398,619 | |||||||||||
| Total | $ | 13,398,619 | $ | — | $ | 13,398,619 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 6,048,832 | $ | (6,048,832 | ) | $ | — | $ | — | ||||||||
| UBS AG | 7,349,787 | (7,349,787 | ) | — | — | ||||||||||||
| Total | $ | 13,398,619 | $ | (13,398,619 | ) | $ | — | $ | — | ||||||||
| ProShares UltraShort Yen | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 38,346,817 | $ | — | $ | 38,346,817 | |||||||||||
| Total | $ | 38,346,817 | $ | — | $ | 38,346,817 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 18,518,532 | $ | (14,958,352 | ) | $ | — | $ | 3,560,180 | ||||||||
| UBS AG | 19,828,285 | (17,590,896 | ) | — | 2,237,389 | ||||||||||||
| Total | $ | 38,346,817 | $ | (32,549,248 | ) | $ | — | $ | 5,797,569 | ||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 232,642 | $ | — | $ | 232,642 | |||||||||||
| Total | $ | 232,642 | $ | — | $ | 232,642 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| UBS AG | $ | 232,642 | $ | (232,642 | ) | $ | — | $ | — | ||||||||
| Total | $ | 232,642 | $ | (232,642 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 306,268 | $ | — | $ | 306,268 | |||||||||||
| Total | $ | 306,268 | $ | — | $ | 306,268 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 198,117 | $ | (198,117 | ) | $ | — | $ | — | ||||||||
| UBS AG | 108,151 | (108,151 | ) | — | — | ||||||||||||
| Total | $ | 306,268 | $ | (306,268 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 3,430,415 | $ | — | $ | 3,430,415 | |||||||||||
| Swap agreements | 33,333,620 | — | 33,333,620 | ||||||||||||||
| Total | $ | 36,764,035 | $ | — | $ | 36,764,035 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in | |||||||||||||||||
| the Statement of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 3,430,415 | $ | — | $ | — | $ | 3,430,415 | |||||||||
| Goldman Sachs International | 14,334,730 | (11,924,574 | ) | — | 2,410,156 | ||||||||||||
| Societe Generale S.A. | 8,989,866 | — | (8,989,866 | ) | — | ||||||||||||
| UBS AG | 10,009,024 | (8,589,406 | ) | — | 1,419,618 | ||||||||||||
| Total | $ | 36,764,035 | $ | (20,513,980 | ) | $ | (8,989,866 | ) | $ | 7,260,189 | |||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 4,891,783 | $ | — | $ | 4,891,783 | |||||||||||
| Total | $ | 4,891,783 | $ | — | $ | 4,891,783 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 4,891,783 | $ | — | $ | (4,891,783 | ) | $ | — | ||||||||
| Total | $ | 4,891,783 | $ | — | $ | (4,891,783 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Gold | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 3,980 | — | 3,980 | ||||||||||||||
| Total | $ | 3,980 | $ | — | $ | 3,980 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 3,980 | $ | — | $ | — | $ | 3,980 | |||||||||
| Total | $ | 3,980 | $ | — | $ | — | $ | 3,980 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 15,652,058 | $ | — | $ | 15,652,058 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 15,652,058 | $ | — | $ | 15,652,058 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 4,622,873 | $ | (4,622,873 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs International | 3,678,367 | (3,678,367 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 3,715,989 | (3,715,989 | ) | — | — | ||||||||||||
| UBS AG | 3,634,829 | (3,634,829 | ) | — | — | ||||||||||||
| Total | $ | 15,652,058 | $ | (15,652,058 | ) | $ | — | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Silver | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 2,520 | — | 2,520 | ||||||||||||||
| Total | $ | 2,520 | $ | — | $ | 2,520 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 2,520 | $ | — | $ | — | $ | 2,520 | |||||||||
| Total | $ | 2,520 | $ | — | $ | — | $ | 2,520 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 145,740,706 | $ | — | $ | 145,740,706 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 145,740,706 | $ | — | $ | 145,740,706 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 44,873,116 | $ | (42,756,218 | ) | $ | — | $ | 2,116,898 | ||||||||
| Goldman Sachs International | 34,491,042 | (34,491,042 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 34,802,217 | (34,802,217 | ) | — | — | ||||||||||||
| UBS AG | 31,574,331 | (31,574,331 | ) | — | — | ||||||||||||
| Total | $ | 145,740,706 | $ | (143,623,808 | ) | $ | — | $ | 2,116,898 | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Australian Dollar | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 12,000 | $ | — | $ | 12,000 | |||||||||||
| Total | $ | 12,000 | $ | — | $ | 12,000 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 12,000 | $ | — | $ | — | $ | 12,000 | |||||||||
| Total | $ | 12,000 | $ | — | $ | — | $ | 12,000 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 89,473 | $ | — | $ | 89,473 | |||||||||||
| Total | $ | 89,473 | $ | — | $ | 89,473 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 38,327 | $ | — | $ | — | $ | 38,327 | |||||||||
| UBS AG | 51,146 | — | — | 51,146 | |||||||||||||
| Total | $ | 89,473 | $ | — | $ | — | $ | 89,473 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 2,314 | $ | — | $ | 2,314 | |||||||||||
| Total | $ | 2,314 | $ | — | $ | 2,314 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 635 | $ | (635 | ) | $ | — | $ | — | ||||||||
| UBS AG | 1,679 | (1,679 | ) | — | — | ||||||||||||
| Total | $ | 2,314 | $ | (2,314 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra Yen | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 13,523 | $ | — | $ | 13,523 | |||||||||||
| Total | $ | 13,523 | $ | — | $ | 13,523 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 7,325 | $ | — | $ | — | $ | 7,325 | |||||||||
| UBS AG | 6,198 | — | — | 6,198 | |||||||||||||
| Total | $ | 13,523 | $ | — | $ | — | $ | 13,523 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts | ||||||||||||||
| of Recognized | Offset in the | of | |||||||||||||||
| Liabilities | Statement of | Liabilities | |||||||||||||||
| Financial Condition | Presented in the | ||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 507,819 | $ | — | $ | 507,819 | |||||||||||
| Total | $ | 507,819 | $ | — | $ | 507,819 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 231,047 | $ | (231,047 | ) | $ | — | $ | — | ||||||||
| UBS AG | 276,772 | (178,999 | ) | — | 97,773 | ||||||||||||
| Total | $ | 507,819 | $ | (410,046 | ) | $ | — | $ | 97,773 | ||||||||
| ProShares VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 31,540,181 | $ | — | $ | 31,540,181 | |||||||||||
| Total | $ | 31,540,181 | $ | — | $ | 31,540,181 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 31,540,181 | $ | — | $ | (31,540,181 | ) | $ | — | ||||||||
| Total | $ | 31,540,181 | $ | — | $ | (31,540,181 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares VIX Mid-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 1,890,675 | $ | — | $ | 1,890,675 | |||||||||||
| Total | $ | 1,890,675 | $ | — | $ | 1,890,675 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 1,890,675 | $ | — | $ | (1,890,675 | ) | $ | — | ||||||||
| Total | $ | 1,890,675 | $ | — | $ | (1,890,675 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | 301,351 | — | 301,351 | ||||||||||||||
| Total | $ | 301,351 | $ | — | $ | 301,351 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Societe Generale S.A. | $ | 301,351 | $ | — | $ | 301,351 | $ | — | |||||||||
| Total | $ | 301,351 | $ | — | $ | 301,351 | $ | — | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 35,666,735 | $ | — | $ | 35,666,735 | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | 35,666,735 | $ | — | $ | 35,666,735 | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 35,666,735 | $ | — | $ | (35,666,735 | ) | $ | — | ||||||||
| Total | $ | 35,666,735 | $ | — | $ | (35,666,735 | ) | $ | — | ||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 5,524,721 | $ | — | $ | 5,524,721 | |||||||||||
| Total | $ | 5,524,721 | $ | — | $ | 5,524,721 | |||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 5,524,721 | $ | — | $ | — | $ | 5,524,721 | |||||||||
| Total | $ | 5,524,721 | $ | — | $ | — | $ | 5,524,721 | |||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
Agreements
| Agreements | 9 Months Ended |
| Sep. 30, 2013 | |
| Text Block [Abstract] | ' |
| Agreements | ' |
| NOTE 4 – AGREEMENTS | |
| Management Fee | |
| Each Leveraged Fund, the Short Euro Fund and each Geared VIX Fund pays the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.95% per annum of its average daily NAV of such Fund. Each Matching VIX Fund pays the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.85% per annum of its average daily NAV of such Fund. The Sponsor did not and will not charge its fee in the first year of operation of each Fund in an amount equal to the organization and offering costs. The Sponsor reimbursed or will reimburse each Fund to the extent that its offering costs exceed the Management Fee for the first year of operations. The Management Fee is paid in consideration of the Sponsor’s services as commodity pool operator, and for managing the business and affairs of the Funds. From the Management Fee, the Sponsor pays the fees and expenses of the Administrator, Custodian, Distributor, ProFunds Distributors, Inc. (“PDI”), an affiliated broker-dealer of the Sponsor, Transfer Agent and any index licensors for the Funds , the routine operational, administrative and other ordinary expenses of each Fund, and the normal and expected expenses incurred in connection with the continuous offering of Shares of each Fund after the commencement of its trading operations, including, but not limited to, expenses such as tax preparation expenses, legal fees not in excess of $100,000 per annum, ongoing SEC registration fees not exceeding 0.021% per annum of the NAV of a Fund and Financial Industry Regulatory Authority (“FINRA”) filing fees, individual K-1 preparation and mailing fees not exceeding 0.10% per annum of the net assets of a Fund, and report preparation and mailing expenses. For the nine months ended September 30, 2013 and 2012, the Sponsor paid and is currently paying brokerage commissions on VIX futures contracts for the Matching VIX Funds. Each Fund incurs and pays its non-recurring and unusual fees and expenses. | |
| The Administrator | |
| The Sponsor and the Trust, for itself and on behalf of each Fund, has appointed Brown Brothers Harriman & Co. (“BBH&Co.”) as the Administrator of the Funds, and the Sponsor, and the Trust, on its own behalf and on behalf of each Fund, and BBH&Co. have entered into an Administrative Agency Agreement (the “Administration Agreement”) in connection therewith. Pursuant to the terms of the Administration Agreement and under the supervision and direction of the Sponsor and the Trust, BBH&Co. prepares and files certain regulatory filings on behalf of the Funds. BBH&Co. may also perform other services for the Funds pursuant to the Administration Agreement as mutually agreed upon by the Sponsor, the Trust and BBH&Co. from time to time. Pursuant to the terms of the Administration Agreement, BBH&Co. also serves as the Transfer Agent of the Funds. The Administrator’s fees are paid on behalf of the Funds by the Sponsor. | |
| The Custodian | |
| BBH&Co. serves as the Custodian of the Funds, and the Trust, on its own behalf and on behalf of each Fund, and BBH&Co. have entered into a Custodian Agreement in connection therewith. Pursuant to the terms of the Custodian Agreement, BBH&Co. is responsible for the holding and safekeeping of assets delivered to it by the Funds, and performing various administrative duties in accordance with instructions delivered to BBH&Co. by the Funds. The Custodian’s fees are paid on behalf of the Funds by the Sponsor. | |
| The Distributor | |
| SEI Investments Distribution Co. (“SEI”), serves as Distributor of the Funds and assists the Sponsor and the Administrator with certain functions and duties relating to distribution and marketing, including taking creation and redemption orders, consulting with the marketing staff of the Sponsor and its affiliates with respect to compliance with the requirements of FINRA and/or the NFA in connection with marketing efforts, and reviewing and filing of marketing materials with FINRA and/or the NFA. SEI retains all marketing materials separately for each Fund, at c/o SEI, One Freedom Valley Drive, Oaks, PA 19456. The Sponsor, on behalf of each Fund, has entered into a Distribution Services Agreement with SEI. | |
| Routine Operational, Administrative and Other Ordinary Expenses | |
| The Sponsor pays all of the routine operational, administrative and other ordinary expenses of each Fund generally, as determined by the Sponsor including, but not limited to, fees and expenses of the Administrator, Custodian, Distributor, PDI, Transfer Agent, accounting and auditing fees and expenses, tax preparation expenses, legal fees not in excess of $100,000 per annum, ongoing SEC registration fees not exceeding 0.021% per annum of the NAV of a Fund, FINRA filing fees, individual Schedule K-1 preparation and mailing fees not exceeding 0.10% per annum of the NAV of a Fund, and report preparation and mailing expenses. | |
| Non-Recurring Fees and Expenses | |
| Each Fund pays all non-recurring and unusual fees and expenses, if any, as determined by the Sponsor. Non-recurring and unusual fees and expenses are fees and expenses such as legal claims and liabilities, litigation costs or indemnification or other material expenses which are not currently anticipated obligations of the Funds. Such fees and expenses are those that are non-recurring, unexpected or unusual in nature. |
Offering_Costs
| Offering Costs | 9 Months Ended |
| Sep. 30, 2013 | |
| Text Block [Abstract] | ' |
| Offering Costs | ' |
| NOTE 5 – OFFERING COSTS | |
| Offering costs will be amortized by the Funds over a twelve month period on a straight-line basis beginning once the fund commences operations. The Sponsor did not charge its Management Fee in the first year of operations of the UltraShort DJ-UBS Natural Gas Fund, Ultra DJ-UBS Natural Gas Fund, Ultra Australian Dollar Fund, UltraShort Australian Dollar Fund, Short Euro Fund, each Geared VIX Fund and each Matching VIX Fund in an amount equal to the offering costs. The Sponsor reimbursed each Fund, with the exception of each Matching VIX Fund, to the extent that its offering costs exceeded 0.95% of its average daily NAV for the first year of operations. The Sponsor reimbursed each Matching VIX Fund to the extent its offering costs exceeded 0.85% of its average daily NAV for the first year of operations. | |
Creation_and_Redemption_of_Cre
| Creation and Redemption of Creation Units | 9 Months Ended | ||||||||
| Sep. 30, 2013 | |||||||||
| Text Block [Abstract] | ' | ||||||||
| Creation and Redemption of Creation Units | ' | ||||||||
| NOTE 6 – CREATION AND REDEMPTION OF CREATION UNITS | |||||||||
| Each Fund issues and redeems Shares from time to time, but only in one or more Creation Units. A Creation Unit is a block of 50,000 Shares of a Geared Fund and 25,000 Shares of a Matching VIX Fund. Creation Units may be created or redeemed only by Authorized Participants. As a result of the share splits and reverse share splits as described in Note 1, certain redemptions as disclosed in the Statements of Changes in Shareholders’ Equity reflect payment of fractional share balances on beneficial shareholder accounts. | |||||||||
| Except when aggregated in Creation Units, the Shares are not redeemable securities. Retail investors, therefore, generally will not be able to purchase or redeem Shares directly from or with a Fund. Rather, most retail investors will purchase or sell Shares in the secondary market with the assistance of a broker. Thus, some of the information contained in these Notes to Financial Statements, such as references to the Transaction Fees imposed on purchases and redemptions, is not relevant to retail investors. | |||||||||
| Transaction Fees on Creation and Redemption Transactions | |||||||||
| The manner by which Creation Units are purchased or redeemed is dictated by the terms of the Authorized Participant Agreement and Authorized Participant Handbook. By placing a purchase order, an Authorized Participant agrees to: (1) deposit cash with the Custodian; and (2) if permitted by the Sponsor in its sole discretion, enter into or arrange for an exchange of futures contract for related position or block trade whereby the Authorized Participant would also transfer to such Fund a number and type of exchange-traded futures contracts at or near the closing settlement price for such contracts on the purchase order date. | |||||||||
| Authorized Participants may pay a fixed transaction fee of up to $500 in connection with each order to create or redeem a Creation Unit in order to compensate BBH&Co., as the Administrator, the Custodian and the Transfer Agent of each Fund and its Shares, for services in processing the creation and redemption of Creation Units and to offset the costs of increasing or decreasing derivative positions. Authorized Participants also may pay a variable transaction fee to the Fund of up to 0.10% of the value of the Creation Unit that is purchased or redeemed unless the transaction fee is waived or otherwise adjusted by the Sponsor. The Sponsor provides such Authorized Participant with prompt notice in advance of any such waiver or adjustment of the transaction fee. Authorized Participants may sell the Shares included in the Creation Units they purchase from the Funds to other investors in the secondary market. | |||||||||
| Transaction fees for the three and nine months ended September 30, 2013, which are included in the Sale and/or Redemption of Shares on the Statements of Changes in Shareholders’ Equity, were as follows: | |||||||||
| Fund | Three Months Ended | Nine Months Ended | |||||||
| September 30, 2013 | September 30, 2013 | ||||||||
| UltraShort DJ-UBS Commodity | $ | — | $ | — | |||||
| UltraShort DJ-UBS Crude Oil | 119,865 | 237,750 | |||||||
| UltraShort DJ-UBS Natural Gas | 1,251 | 5,700 | |||||||
| UltraShort Gold | 19,262 | 62,352 | |||||||
| UltraShort Silver | 43,020 | 111,025 | |||||||
| Short Euro | — | — | |||||||
| UltraShort Australian Dollar | — | — | |||||||
| UltraShort Euro | — | — | |||||||
| UltraShort Yen | — | — | |||||||
| Ultra DJ-UBS Commodity | — | 283 | |||||||
| Ultra DJ-UBS Crude Oil | 41,709 | 188,267 | |||||||
| Ultra DJ-UBS Natural Gas | 8,303 | 25,719 | |||||||
| Ultra Gold | 7,284 | 21,066 | |||||||
| Ultra Silver | 25,625 | 91,299 | |||||||
| Ultra Australian Dollar | — | — | |||||||
| Ultra Euro | — | — | |||||||
| Ultra Yen | — | — | |||||||
| VIX Short-Term Futures ETF | — | — | |||||||
| VIX Mid-Term Futures ETF | — | — | |||||||
| Ultra VIX Short-Term Futures ETF | 182,504 | 659,703 | |||||||
| Short VIX Short-Term Futures ETF | 25,366 | 101,646 | |||||||
| Total Trust | $ | 474,189 | $ | 1,504,810 | |||||
Financial_Highlights
| Financial Highlights | 9 Months Ended | ||||||||||||||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||||||||||||||
| Quarterly Financial Information Disclosure [Abstract] | ' | ||||||||||||||||||||||||||||
| Financial Highlights | ' | ||||||||||||||||||||||||||||
| NOTE 7 – FINANCIAL HIGHLIGHTS | |||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the three months ended September 30, 2013: | |||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort DJ- | UltraShort DJ- | UltraShort DJ- | UltraShort Gold | UltraShort | Short Euro | UltraShort | ||||||||||||||||||||||
| UBS | UBS Crude Oil | UBS Natural | Silver | Australian | |||||||||||||||||||||||||
| Commodity | Gas | Dollar | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2013 | $ | 65.8903 | $ | 36.3393 | $ | 88.5724 | $ | 114.0985 | $ | 110.5972 | $ | 37.9264 | $ | 46.4112 | |||||||||||||||
| Net investment income (loss) | (0.1408 | ) | (0.0691 | ) | (0.2504 | ) | (0.2074 | ) | (0.1902 | ) | (0.0886 | ) | (0.1140 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (3.3059 | ) | (6.0060 | ) | 3.3319 | (25.7822 | ) | (33.8396 | ) | (1.4518 | ) | (2.7008 | ) | ||||||||||||||||
| Change in net asset value from operations | (3.4467 | ) | (6.0751 | ) | 3.0815 | (25.9896 | ) | (34.0298 | ) | (1.5404 | ) | (2.8148 | ) | ||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 62.4436 | $ | 30.2642 | $ | 91.6539 | $ | 88.1089 | $ | 76.5674 | $ | 36.386 | $ | 43.5964 | |||||||||||||||
| Market value per share, at June 30, 2013† | $ | 64.97 | $ | 36.45 | $ | 88 | $ | 106.5 | $ | 101.27 | $ | 38.01 | $ | 46.54 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 57.37 | $ | 30.25 | $ | 91.86 | $ | 87.88 | $ | 76.49 | $ | 36.41 | $ | 43.54 | |||||||||||||||
| Total Return, at net asset value^ | (5.2 | )% | (16.7 | )% | 3.5 | % | (22.8 | )% | (30.8 | )% | (4.1 | )% | (6.1 | )% | |||||||||||||||
| Total Return, at market value^ | (11.7 | )% | (17.0 | )% | 4.4 | % | (17.5 | )% | (24.5 | )% | (4.2 | )% | (6.4 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.97 | )% | (1.17 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.02 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.91 | )% | (0.94 | )% | (1.14 | )% | (0.91 | )% | (0.91 | )% | (0.95 | )% | (0.99 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort Euro | UltraShort Yen | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Commodity | Crude Oil | Natural Gas | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2013 | $ | 19.289 | $ | 64.1071 | $ | 19.2603 | $ | 30.1614 | $ | 36.0214 | $ | 41.6758 | $ | 15.7433 | |||||||||||||||
| Net investment income (loss) | (0.0429 | ) | (0.1464 | ) | (0.0469 | ) | (0.0851 | ) | (0.0937 | ) | (0.1173 | ) | (0.0458 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (1.5079 | ) | (1.7693 | ) | 0.7443 | 4.6335 | (3.6705 | ) | 9.1902 | 4.3722 | |||||||||||||||||||
| Change in net asset value from operations | (1.5508 | ) | (1.9157 | ) | 0.6974 | 4.5484 | (3.7642 | ) | 9.0729 | 4.3264 | |||||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 17.7382 | $ | 62.1914 | $ | 19.9577 | $ | 34.7098 | $ | 32.2572 | $ | 50.7487 | $ | 20.0697 | |||||||||||||||
| Market value per share, at June 30, 2013† | $ | 19.29 | $ | 64.08 | $ | 18.96 | $ | 30.11 | $ | 36.26 | $ | 44.63 | $ | 17 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 17.75 | $ | 62.23 | $ | 19.92 | $ | 34.73 | $ | 32.18 | $ | 50.86 | $ | 20.05 | |||||||||||||||
| Total Return, at net asset value^ | (8.0 | )% | (3.0 | )% | 3.6 | % | 15.1 | % | (10.4 | )% | 21.8 | % | 27.5 | % | |||||||||||||||
| Total Return, at market value^ | (8.0 | )% | (2.9 | )% | 5.1 | % | 15.3 | % | (11.3 | )% | 14 | % | 17.9 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.96 | )% | (1.11 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.92 | )% | (0.92 | )% | (0.91 | )% | (0.93 | )% | (1.08 | )% | (0.91 | )% | (0.91 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra Australian | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid-Term | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Dollar | Term Futures | Futures ETF | Short-Term | Short-Term | |||||||||||||||||||||||||
| ETF | Futures ETF | Futures ETF | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2013 | $ | 32.8323 | $ | 23.4744 | $ | 21.2199 | $ | 55.9419 | $ | 28.2875 | $ | 71.9959 | $ | 78.2628 | |||||||||||||||
| Net investment income (loss) | (0.0804 | ) | (0.0556 | ) | (0.0490 | ) | (0.0874 | ) | (0.0496 | ) | (0.1775 | ) | (0.3818 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | 1.5404 | 1.8323 | 0.3008 | (16.3058 | ) | (5.0606 | ) | (37.2930 | ) | 27.1345 | |||||||||||||||||||
| Change in net asset value from operations | 1.46 | 1.7767 | 0.2518 | (16.3932 | ) | (5.1102 | ) | (37.4705 | ) | 26.7527 | |||||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 34.2923 | $ | 25.2511 | $ | 21.4717 | $ | 39.5487 | $ | 23.1773 | $ | 34.5254 | $ | 105.0155 | |||||||||||||||
| Market value per share, at June 30, 2013† | $ | 33.96 | $ | 23.25 | $ | 21.1 | $ | 55.91 | $ | 28.25 | $ | 71.69 | $ | 78.45 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 34.35 | $ | 25.3 | $ | 21.7 | $ | 39.45 | $ | 23.02 | $ | 34.34 | $ | 105.14 | |||||||||||||||
| Total Return, at net asset value^ | 4.4 | % | 7.6 | % | 1.2 | % | (29.3 | )% | (18.1 | )% | (52.0 | )% | 34.2 | % | |||||||||||||||
| Total Return, at market value^ | 1.1 | % | 8.8 | % | 2.8 | % | (29.4 | )% | (18.5 | )% | (52.1 | )% | 34 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (1.00 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.81 | )% | (1.54 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.97 | )% | (0.91 | )% | (0.91 | )% | (0.83 | )% | (0.82 | )% | (1.79 | )% | (1.51 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the three months ended September 30, 2012: | |||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort DJ- | UltraShort DJ- | UltraShort DJ- | UltraShort | UltraShort | Short Euro | UltraShort | ||||||||||||||||||||||
| UBS | UBS Crude Oil | UBS Natural | Gold* | Silver | Australian | ||||||||||||||||||||||||
| Commodity | Gas* | Dollar+ | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2012 | $ | 59.0619 | $ | 49.2304 | $ | 121.2686 | $ | 70.9895 | $ | 69.925 | $ | 39.4721 | $ | 40 | |||||||||||||||
| Net investment income (loss) | (0.1137 | ) | (0.0935 | ) | (0.3363 | ) | (0.1462 | ) | (0.1252 | ) | (0.0901 | ) | (0.0764 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (10.9209 | ) | (8.5379 | ) | (32.3842 | ) | (14.5206 | ) | (29.9239 | ) | (0.6584 | ) | (1.2223 | ) | |||||||||||||||
| Change in net asset value from operations | (11.0346 | ) | (8.6314 | ) | (32.7205 | ) | (14.6668 | ) | (30.0491 | ) | (0.7485 | ) | (1.2987 | ) | |||||||||||||||
| Net asset value, at September 30, 2012 | $ | 48.0273 | $ | 40.599 | $ | 88.5481 | $ | 56.3227 | $ | 39.8759 | $ | 38.7236 | $ | 38.7013 | |||||||||||||||
| Market value per share, at June 30, 2012† | $ | 58.64 | $ | 49.42 | $ | 120.52 | $ | 70.92 | $ | 67.82 | $ | 39.49 | $ | 40 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 48.25 | $ | 40.72 | $ | 88.56 | $ | 56.48 | $ | 40.14 | $ | 38.64 | $ | 38.62 | |||||||||||||||
| Total Return, at net asset value^ | (18.7 | )% | (17.5 | )% | (27.0 | )% | (20.7 | )% | (43.0 | )% | (1.9 | )% | (3.2 | )% | |||||||||||||||
| Total Return, at market value^ | (17.7 | )% | (17.6 | )% | (26.5 | )% | (20.4 | )% | (40.8 | )% | (2.2 | )% | (3.5 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.98 | )% | (1.27 | )% | (0.95 | )% | (0.95 | )% | (0.96 | )% | (1.03 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.88 | )% | (0.91 | )% | (1.22 | )% | (0.88 | )% | (0.87 | )% | (0.90 | )% | (0.95 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| + | From commencement of investment operations, July 17, 2012 through September 30, 2012. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort Euro | UltraShort Yen | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Commodity | Crude Oil | Natural Gas | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2012 | $ | 20.9071 | $ | 43.5348 | $ | 23.5183 | $ | 27.713 | $ | 45.6921 | $ | 79.7618 | $ | 37.0313 | |||||||||||||||
| Net investment income (loss) | (0.0470 | ) | (0.0927 | ) | (0.0587 | ) | (0.0715 | ) | (0.1223 | ) | (0.1868 | ) | (0.0973 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (0.7332 | ) | (2.1433 | ) | 4.5424 | 3.67 | 5.5731 | 17.5971 | 21.864 | ||||||||||||||||||||
| Change in net asset value from operations | (0.7802 | ) | (2.2360 | ) | 4.4837 | 3.5985 | 5.4508 | 17.4103 | 21.7667 | ||||||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 20.1269 | $ | 41.2988 | $ | 28.002 | $ | 31.3115 | $ | 51.1429 | $ | 97.1721 | $ | 58.798 | |||||||||||||||
| Market value per share, at June 30, 2012† | $ | 20.9 | $ | 43.51 | $ | 23.66 | $ | 27.54 | $ | 45.75 | $ | 79.74 | $ | 38.13 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 20.12 | $ | 41.33 | $ | 27.71 | $ | 31.21 | $ | 51.09 | $ | 96.92 | $ | 58.35 | |||||||||||||||
| Total Return, at net asset value^ | (3.7 | )% | (5.1 | )% | 19.1 | % | 13 | % | 11.9 | % | 21.8 | % | 58.8 | % | |||||||||||||||
| Total Return, at market value^ | (3.7 | )% | (5.0 | )% | 17.1 | % | 13.3 | % | 11.7 | % | 21.5 | % | 53 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.14 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.88 | )% | (0.88 | )% | (0.88 | )% | (0.90 | )% | (1.08 | )% | (0.88 | )% | (0.88 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra Australian | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid-Term | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Dollar+ | Term Futures | Futures ETF | Short-Term | Short-Term | |||||||||||||||||||||||||
| ETF* | Futures ETF* | Futures ETF* | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2012 | $ | 40 | $ | 22.6354 | $ | 33.492 | $ | 160.0441 | $ | 55.0359 | $ | 962.1056 | $ | 45.2817 | |||||||||||||||
| Net investment income (loss) | (0.0806 | ) | (0.0488 | ) | (0.0757 | ) | (0.2401 | ) | (0.0974 | ) | (2.1862 | ) | (0.2889 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | 0.9723 | 0.622 | 1.5795 | (64.7877 | ) | (13.4312 | ) | (656.0164 | ) | 23.0577 | |||||||||||||||||||
| Change in net asset value from operations | 0.8917 | 0.5732 | 1.5038 | (65.0278 | ) | (13.5286 | ) | (658.2026 | ) | 22.7688 | |||||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 40.8917 | $ | 23.2086 | $ | 34.9958 | $ | 95.0163 | $ | 41.5073 | $ | 303.903 | $ | 68.0505 | |||||||||||||||
| Market value per share, at June 30, 2012† | $ | 40 | $ | 22.62 | $ | 33.39 | $ | 161.6 | $ | 55.08 | $ | 984 | $ | 44.92 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 40.9 | $ | 23.18 | $ | 35.28 | $ | 96.1 | $ | 41.66 | $ | 309.2 | $ | 67.37 | |||||||||||||||
| Total Return, at net asset value^ | 2.2 | % | 2.5 | % | 4.5 | % | (40.6 | )% | (24.6 | )% | (68.4 | )% | 50.3 | % | |||||||||||||||
| Total Return, at market value^ | 2.3 | % | 2.5 | % | 5.7 | % | (40.5 | )% | (24.4 | )% | (68.6 | )% | 50 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (1.02 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.67 | )% | (2.16 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.94 | )% | (0.88 | )% | (0.87 | )% | (0.79 | )% | (0.80 | )% | (1.64 | )% | (2.08 | )% | |||||||||||||||
| + | From commencement of investment operations, July 17, 2012 through September 30, 2012. | ||||||||||||||||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the nine months ended September 30, 2013: | |||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | UltraShort DJ- | UltraShort | UltraShort | Short Euro | UltraShort | ||||||||||||||||||||||
| DJ-UBS | DJ-UBS | UBS Natural | Gold | Silver | Australian | ||||||||||||||||||||||||
| Commodity | Crude Oil | Gas* | Dollar | ||||||||||||||||||||||||||
| Net asset value, at December 31, 2012 | $ | 54.1021 | $ | 40.3079 | $ | 102.1402 | $ | 63.8688 | $ | 51.3951 | $ | 37.6285 | $ | 37.8081 | |||||||||||||||
| Net investment income (loss) | (0.3875 | ) | (0.2262 | ) | (0.6806 | ) | (0.5395 | ) | (0.4408 | ) | (0.2593 | ) | (0.3257 | ) | |||||||||||||||
| Net realized and unrealized gain (loss)# | 8.729 | (9.8175 | ) | (9.8057 | ) | 24.7796 | 25.6131 | (0.9832 | ) | 6.114 | |||||||||||||||||||
| Change in net asset value from operations | 8.3415 | (10.0437 | ) | (10.4863 | ) | 24.2401 | 25.1723 | (1.2425 | ) | 5.7883 | |||||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 62.4436 | $ | 30.2642 | $ | 91.6539 | $ | 88.1089 | $ | 76.5674 | $ | 36.386 | $ | 43.5964 | |||||||||||||||
| Market value per share, at December 31, 2012† | $ | 51.64 | $ | 40.44 | $ | 101.64 | $ | 62.6 | $ | 50.07 | $ | 37.64 | $ | 37.74 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 57.37 | $ | 30.25 | $ | 91.86 | $ | 87.88 | $ | 76.49 | $ | 36.41 | $ | 43.54 | |||||||||||||||
| Total Return, at net asset value^ | 15.4 | % | (24.9 | )% | (10.3 | )% | 38 | % | 49 | % | (3.3 | )% | 15.3 | % | |||||||||||||||
| Total Return, at market value^ | 11.1 | % | (25.2 | )% | (9.6 | )% | 40.4 | % | 52.8 | % | (3.3 | )% | 15.4 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.98 | )% | (1.20 | )% | (0.95 | )% | (0.95 | )% | (0.96 | )% | (1.03 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.89 | )% | (0.93 | )% | (1.15 | )% | (0.90 | )% | (0.89 | )% | (0.93 | )% | (0.99 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| # | The amount shown for a Share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Euro | Yen | Commodity | Crude Oil | Natural Gas | |||||||||||||||||||||||||
| Net asset value, at December 31, 2012 | $ | 19.0172 | $ | 50.7577 | $ | 24.3875 | $ | 29.3941 | $ | 39.049 | $ | 83.7634 | $ | 42.9727 | |||||||||||||||
| Net investment income (loss) | (0.1275 | ) | (0.4164 | ) | (0.1487 | ) | (0.2120 | ) | (0.3134 | ) | (0.4298 | ) | (0.1804 | ) | |||||||||||||||
| Net realized and unrealized gain (loss)# | (1.1515 | ) | 11.8501 | (4.2811 | ) | 5.5277 | (6.4784 | ) | (32.5849 | ) | (22.7226 | ) | |||||||||||||||||
| Change in net asset value from operations | (1.2790 | ) | 11.4337 | (4.4298 | ) | 5.3157 | (6.7918 | ) | (33.0147 | ) | (22.9030 | ) | |||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 17.7382 | $ | 62.1914 | $ | 19.9577 | $ | 34.7098 | $ | 32.2572 | $ | 50.7487 | $ | 20.0697 | |||||||||||||||
| Market value per share, at December 31, 2012† | $ | 19.01 | $ | 50.77 | $ | 23.93 | $ | 29.32 | $ | 39.24 | $ | 85.34 | $ | 44.1 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 17.75 | $ | 62.23 | $ | 19.92 | $ | 34.73 | $ | 32.18 | $ | 50.86 | $ | 20.05 | |||||||||||||||
| Total Return, at net asset value^ | (6.7 | )% | 22.5 | % | (18.2 | )% | 18.1 | % | (17.4 | )% | (39.4 | )% | (53.3 | )% | |||||||||||||||
| Total Return, at market value^ | (6.6 | )% | 22.6 | % | (16.8 | )% | 18.5 | % | (18.0 | )% | (40.4 | )% | (54.5 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.13 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.90 | )% | (0.90 | )% | (0.90 | )% | (0.91 | )% | (1.08 | )% | (0.88 | )% | (0.88 | )% | |||||||||||||||
| # | The amount shown for a Share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid- | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Australian | Term Futures | Term Futures | Short-Term | Short-Term | |||||||||||||||||||||||||
| Dollar | ETF* | ETF | Futures ETF* | Futures ETF | |||||||||||||||||||||||||
| Net asset value, at December 31, 2012 | $ | 41.4986 | $ | 24.3499 | $ | 28.184 | $ | 83.9374 | $ | 34.7003 | $ | 201.3178 | $ | 66.1298 | |||||||||||||||
| Net investment income (loss) | (0.2663 | ) | (0.1625 | ) | (0.1519 | ) | (0.3083 | ) | (0.1543 | ) | (0.7848 | ) | (1.0162 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (6.9400 | ) | 1.0637 | (6.5604 | ) | (44.0804 | ) | (11.3687 | ) | (166.0076 | ) | 39.9019 | |||||||||||||||||
| Change in net asset value from operations | (7.2063 | ) | 0.9012 | (6.7123 | ) | (44.3887 | ) | (11.5230 | ) | (166.7924 | ) | 38.8857 | |||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 34.2923 | $ | 25.2511 | $ | 21.4717 | $ | 39.5487 | $ | 23.1773 | $ | 34.5254 | $ | 105.0155 | |||||||||||||||
| Market value per share, at December 31, 2012† | $ | 41.45 | $ | 24.32 | $ | 28.28 | $ | 85.05 | $ | 34.22 | $ | 209 | $ | 65.45 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 34.35 | $ | 25.3 | $ | 21.7 | $ | 39.45 | $ | 23.02 | $ | 34.34 | $ | 105.14 | |||||||||||||||
| Total Return, at net asset value^ | (17.4 | )% | 3.7 | % | (23.8 | )% | (52.9 | )% | (33.2 | )% | (82.9 | )% | 58.8 | % | |||||||||||||||
| Total Return, at market value^ | (17.1 | )% | 4 | % | (23.3 | )% | (53.6 | )% | (32.7 | )% | (83.6 | )% | 60.6 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.99 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.84 | )% | (1.54 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.95 | )% | (0.90 | )% | (0.89 | )% | (0.81 | )% | (0.81 | )% | (1.82 | )% | (1.50 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the nine months ended September 30, 2012: | |||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | UltraShort | UltraShort | UltraShort | Short Euro+ | UltraShort | ||||||||||||||||||||||
| DJ-UBS | DJ-UBS | DJ-UBS | Gold* | Silver* | Australian | ||||||||||||||||||||||||
| Commodity | Crude Oil | Natural Gas* | Dollar++ | ||||||||||||||||||||||||||
| Net asset value, at December 31, 2011 | $ | 56.9207 | $ | 38.8151 | $ | 95.2206 | $ | 82.7114 | $ | 76.6771 | $ | 40 | $ | 40 | |||||||||||||||
| Net investment income (loss) | (0.3723 | ) | (0.2633 | ) | (1.4076 | ) | (0.4577 | ) | (0.3822 | ) | (0.0959 | ) | (0.0764 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (8.5211 | ) | 2.0472 | (5.2649 | ) | (25.9310 | ) | (36.4190 | ) | (1.1805 | ) | (1.2223 | ) | ||||||||||||||||
| Change in net asset value from operations | (8.8934 | ) | 1.7839 | (6.6725 | ) | (26.3887 | ) | (36.8012 | ) | (1.2764 | ) | (1.2987 | ) | ||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 48.0273 | $ | 40.599 | $ | 88.5481 | $ | 56.3227 | $ | 39.8759 | $ | 38.7236 | $ | 38.7013 | |||||||||||||||
| Market value per share, at December 31, 2011† | $ | 56.19 | $ | 38.69 | $ | 95.84 | $ | 79.24 | $ | 79.35 | $ | 40 | $ | 40 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 48.25 | $ | 40.72 | $ | 88.56 | $ | 56.48 | $ | 40.14 | $ | 38.64 | $ | 38.62 | |||||||||||||||
| Total Return, at net asset value^ | (15.6 | )% | 4.6 | % | (7.0 | )% | (31.9 | )% | (48.0 | )% | (3.2 | )% | (3.2 | )% | |||||||||||||||
| Total Return, at market value^ | (14.1 | )% | 5.2 | % | (7.6 | )% | (28.7 | )% | (49.4 | )% | (3.4 | )% | (3.5 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.98 | )% | (1.43 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.03 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.90 | )% | (0.92 | )% | (1.39 | )% | (0.90 | )% | (0.90 | )% | (0.91 | )% | (0.95 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| + | From commencement of investment operations, June 26, 2012 through September 30, 2012. | ||||||||||||||||||||||||||||
| ++ | From commencement of investment operations, July 17, 2012, through September 30, 2012. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Euro | Yen | Commodity | Crude Oil | Natural Gas* | |||||||||||||||||||||||||
| Net asset value, at December 31, 2011 | $ | 20.3357 | $ | 40.9557 | $ | 25.8805 | $ | 40.8828 | $ | 101.9786 | $ | 75.9066 | $ | 43.1903 | |||||||||||||||
| Net investment income (loss) | (0.1373 | ) | (0.2877 | ) | (0.1730 | ) | (0.2383 | ) | (0.3818 | ) | (0.5744 | ) | (0.3212 | ) | |||||||||||||||
| Net realized and unrealized gain (loss)# | (0.0715 | ) | 0.6308 | 2.2945 | 9.333 | (50.4539 | ) | 21.8399 | 15.9289 | ||||||||||||||||||||
| Change in net asset value from operations | (0.2088 | ) | 0.3431 | 2.1215 | (9.5713 | ) | (50.8357 | ) | 21.2655 | 15.6077 | |||||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 20.1269 | $ | 41.2988 | $ | 28.002 | $ | 31.3115 | $ | 51.1429 | $ | 97.1721 | $ | 58.798 | |||||||||||||||
| Market value per share, at December 31, 2011† | $ | 20.35 | $ | 40.95 | $ | 25.64 | $ | 40.94 | $ | 101.35 | $ | 79.01 | $ | 41.65 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 20.12 | $ | 41.33 | $ | 27.71 | $ | 31.21 | $ | 51.09 | $ | 96.92 | $ | 58.35 | |||||||||||||||
| Total Return, at net asset value^ | (1.0 | )% | 0.8 | % | 8.2 | % | (23.4 | )% | (49.8 | )% | 28 | % | 36.1 | % | |||||||||||||||
| Total Return, at market value^ | (1.1 | )% | 0.9 | % | 8.1 | % | (23.8 | )% | (49.6 | )% | 22.7 | % | 40.1 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.22 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.90 | )% | (0.89 | )% | (0.90 | )% | (0.92 | )% | (1.16 | )% | (0.89 | )% | (0.90 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| # | The amount shown for a Share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid- | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Australian | Term Futures | Term Futures | Short-Term | Short-Term | |||||||||||||||||||||||||
| Dollar++ | ETF* | ETF | Futures ETF* | Futures ETF* | |||||||||||||||||||||||||
| Net asset value, at December 31, 2011 | $ | 40 | $ | 23.886 | $ | 36.4704 | $ | 381.869 | $ | 74.1396 | $ | 7,412.69 | $ | 25.8664 | |||||||||||||||
| Net investment income (loss) | (0.0806 | ) | (0.1590 | ) | (0.2275 | ) | (0.9662 | ) | (0.3463 | ) | (10.6829 | ) | (0.6056 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | 0.9723 | (0.5184 | ) | (1.2471 | ) | (285.8865 | ) | (32.2860 | ) | (7,098.1020 | ) | 42.7897 | |||||||||||||||||
| Change in net asset value from operations | 0.8917 | (0.6774 | ) | (1.4746 | ) | (286.8527 | ) | (32.6323 | ) | (7,108.7849 | ) | 42.1841 | |||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 40.8917 | $ | 23.2086 | $ | 34.9958 | $ | 95.0163 | $ | 41.5073 | $ | 303.903 | $ | 68.0505 | |||||||||||||||
| Market value per share, at December 31, 2011† | $ | 40 | $ | 23.87 | $ | 36.5 | $ | 378.7 | $ | 74.13 | $ | 7,296.00 | $ | 26.14 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 40.9 | $ | 23.18 | $ | 35.28 | $ | 96.1 | $ | 41.66 | $ | 309.2 | $ | 67.37 | |||||||||||||||
| Total Return, at net asset value^ | 2.2 | % | (2.8 | )% | (4.0 | )% | (75.1 | )% | (44.0 | )% | (95.9 | )% | 163.1 | % | |||||||||||||||
| Total Return, at market value^ | 2.3 | % | (2.9 | )% | (3.3 | )% | (74.6 | )% | (43.8 | )% | (95.8 | )% | 157.7 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (1.02 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.74 | )% | (1.88 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.94 | )% | (0.90 | )% | (0.89 | )% | (0.80 | )% | (0.81 | )% | (1.71 | )% | (1.82 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| ++ | From commencement of operations, July 17, 2012, through September 30, 2012. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
Risk
| Risk | 9 Months Ended |
| Sep. 30, 2013 | |
| Risks And Uncertainties [Abstract] | ' |
| Risk | ' |
| NOTE 8 – RISK | |
| Correlation and Compounding Risk | |
| The Geared Funds do not seek to achieve their stated investment objective over a period of time greater than a single day (as measured from NAV calculation time to NAV calculation time). The return of a Geared Fund for a period longer than a single day is the result of its return for each day compounded over the period and usually will differ from the inverse (-1x), two times the inverse (-2x), or two times (2x) of the return of the Geared Fund’s benchmark for the period. A Fund will lose money if its benchmark performance is flat over time, and it is possible for a Geared Fund to lose money over time even if the performance of its benchmark increases (or decreases in the case of Short and UltraShort Funds), as a result of daily rebalancing, the benchmark’s volatility and compounding. Longer holding periods, higher benchmark volatility, inverse exposure and greater leverage each affect the impact of compounding on a Fund’s returns. Daily compounding of a Geared Fund’s investment returns can dramatically and adversely affect its longer-term performance during periods of high volatility. Volatility may be at least as important to a Geared Fund’s return for a period as the return of the Fund’s underlying benchmark. The Matching VIX Funds seek to achieve their stated investment objective both over a single day and over time. | |
| Each Ultra and UltraShort Fund uses leverage and should produce daily returns that are more volatile than that of its benchmark. For example, the daily return of an Ultra Fund with a 2x multiple should be approximately two times as volatile on a daily basis as is the return of a fund with an objective of matching the same benchmark. The daily return of a Short or UltraShort Fund is designed to return the inverse (-1x) or two times the inverse (-2x) of the return that would be expected of a fund with an objective of matching the same benchmark. The Geared Funds are not appropriate for all investors and present different risks than other funds. The Leveraged Funds use leverage and are riskier than similarly benchmarked exchange-traded funds that do not use leverage. An investor should only consider an investment in a Geared Fund if he or she understands the consequences of seeking daily leveraged, daily inverse or daily inverse leveraged investment results. Daily objective geared funds, if used properly and in conjunction with the investor’s view on the future direction and volatility of the markets, can be useful tools for investors who want to manage their exposure to various markets and market segments and who are willing to monitor and/or periodically rebalance their portfolios. Shareholders who invest in the Funds should actively manage and monitor their investments, as frequently as daily. | |
| While the Funds expect to meet their investment objectives, several factors may affect their ability to do so. Among these factors are: (1) the Sponsor’s ability to purchase and sell Financial Instruments in a manner that correlates to a Fund’s objective; (2) an imperfect correlation between the performance of Financial Instruments held by a Fund and the performance of the applicable benchmarks; (3) bid-ask spreads on such Financial Instruments; (4) fees, expenses, transaction costs, financing costs associated with the use of Financial Instruments and commission costs; (5) holding instruments traded in a market that has become illiquid or disrupted; (6) a Fund’s Share prices being rounded to the nearest cent and/or valuation methodology; (7) changes to a benchmark index that are not disseminated in advance; (8) the need to conform a Fund’s portfolio holdings to comply with investment restrictions or policies or regulatory or tax law requirements; (9) early and unanticipated closings of the markets on which the holdings of a Fund trade, resulting in the inability of the Fund to execute intended portfolio transactions; and (10) accounting standards. | |
| A number of factors may affect a Geared Fund’s ability to achieve a high degree of correlation with its benchmark, and there can be no guarantee that a Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent a Geared Fund from achieving its investment objective. In order to achieve a high degree of correlation with their underlying benchmarks, the Geared Funds seek to rebalance their portfolios daily to keep exposure consistent with their investment objectives. Being materially under- or over-exposed to the benchmark may prevent such Geared Funds from achieving a high degree of correlation with such benchmark. Market disruptions or closure, large amounts of assets into or out of the Geared Funds, regulatory restrictions or extreme market volatility will adversely affect such Funds’ ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by the benchmarks’ movements during each day. Because of this, it is unlikely that the Geared Funds will be perfectly exposed (i.e., -1x, -2x or 2x, as applicable) to its benchmark at the end of each day, and the likelihood of being materially under- or over-exposed is higher on days when the benchmark levels are volatile near the close of the trading day. In addition, unlike other funds that do not rebalance their portfolios as frequently, each Geared Fund may be subject to increased trading costs associated with daily portfolio rebalancing in order to maintain appropriate exposure to the underlying benchmarks. | |
| Counterparty Risk | |
| Certain of the Funds will use swap agreements and/or forward contracts as a means to achieve their respective investment objectives. Such Funds will use either swap agreements and/or forward contracts referencing their respective benchmarks. These Funds may also invest in other swap agreements or forward contracts if such instruments tend to exhibit trading prices or returns that correlate with the benchmark or a component of the benchmark and will further the investment objective of the Fund. Certain Funds may invest in swap agreements or forward contracts if position accountability rules or position limits are reached with respect to specific futures contracts or the market for a specific futures contract experiences emergencies (e.g., natural disaster, terrorist attack or an act of God) or disruptions (e.g., a trading halt or a flash crash) that prevent the Funds from obtaining the appropriate amount of investment exposure to the affected futures contract or certain other futures contracts. Although unlikely, those Funds, under these circumstances, could have 100% exposure to swap agreements or forward contracts. | |
| Swap agreements and forward contracts are generally traded in OTC markets and have only recently become subject to regulation by the CFTC. CFTC rules, however, do not cover all types of swap agreements and forward contracts. Investors, therefore, may not receive the protection of CFTC regulation or the statutory scheme of the Commodity Exchange Act (the “CEA”) in connection with each Fund’s swap agreements or forward contracts. The lack of regulation in these markets could expose investors to significant losses under certain circumstances, including in the event of trading abuses or financial failure by participants. | |
| The Funds will be subject to credit risk with respect to the counterparties to the derivative contracts (whether a clearing corporation in the case of cleared instruments or another third party in the case of OTC uncleared instruments). Unlike in futures contracts, the counterparty to uncleared swap agreements or forward contracts is generally a single bank or other financial institution, rather than a clearing organization backed by a group of financial institutions. As a result, a Fund is subject to credit risk with respect to the amount it expects to receive from counterparties to uncleared swaps and forward contracts entered into as part of that Fund’s principal investment strategy. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, a Fund could suffer significant losses on these contracts and the value of an investor’s investment in a Fund may decline. | |
| The Funds have sought to mitigate these risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, subject to certain minimum thresholds; however there are no limitations on the percentage of its assets each Fund may invest in swap agreements or forward contracts with a particular counterparty. To the extent any such collateral is insufficient or there are delays in accessing the collateral, the Funds will be exposed to counterparty risk as described above, including possible delays in recovering amounts as a result of bankruptcy proceedings. The Funds typically enter into transactions only with major global financial institutions. | |
| OTC swaps or forward contracts are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty. If the level of the Fund’s benchmark has a dramatic intraday move that would cause a material decline in the Fund’s NAV, the terms of the swap may permit the counterparty to immediately close out the transaction with the Fund. In that event, it may not be possible for the Fund to enter into another swap agreement or to invest in other Financial Instruments necessary to achieve the desired exposure consistent with the Fund’s objective. This, in turn, may prevent the Fund from achieving its investment objective, particularly if the level of the Fund’s benchmark reverses all or part of its intraday move by the end of the day. In addition, cleared derivative transactions benefit from daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. Transactions entered into directly between two counterparties generally do not benefit from such protections. This exposes the Funds to the risk that a counterparty will not settle a transaction in accordance with its terms and conditions because of a dispute over the terms of the contract (whether or not bona fide) or because of a credit or liquidity problem, thus causing the Funds to suffer a loss. | |
| Each counterparty and/or any of its affiliates may be an Authorized Participant or shareholder of a Fund. | |
| The counterparty risk for cleared derivative transactions is generally lower than for uncleared over-the-counter derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing house for performance of financial obligations. However, there can be no assurance that the clearing house, or its members, will satisfy its obligations to the Fund. | |
| Leverage Risk | |
| The Leveraged Funds may utilize leverage in seeking to achieve their respective investment objectives and will lose more money in market environments adverse to their respective daily investment objectives than funds that do not employ leverage. The use of leveraged and/or inverse leveraged positions could result in the total loss of an investor’s investment. | |
| For example, because the UltraShort Funds and Ultra Funds include a two times the inverse (-2x), or a two times (2x) multiplier, a single-day movement in the relevant benchmark approaching 50% at any point in the day (for an UltraShort Fund or an UltraShort Fund) could result in the total loss or almost total loss of an investor’s investment if that movement is contrary to the investment objective of the Fund in which an investor has invested, even if such Fund’s benchmark subsequently moves in an opposite direction, eliminating all or a portion of the movement. This would be the case with downward single-day or intraday movements in the underlying benchmark of an Ultra Fund or upward single-day or intraday movements in the benchmark of an UltraShort Fund, even if the underlying benchmark maintains a level greater than zero at all times. | |
| Liquidity Risk | |
| Financial Instruments cannot always be liquidated at the desired price. It is difficult to execute a trade at a specific price when there is a relatively small volume of buy and sell orders in a market. A market disruption can also make it difficult to liquidate a position or find a swap or forward contract counterparty at a reasonable cost. Market illiquidity may cause losses for the Funds. The large size of the positions which the Funds may acquire increases the risk of illiquidity by both making their positions more difficult to liquidate and increasing the losses incurred while trying to do so. Any type of disruption or illiquidity will potentially be exacerbated due to the fact that the Funds will typically invest in Financial Instruments related to one benchmark, which in many cases is highly concentrated. | |
| “Contango” and “Backwardation” Risk | |
| In Funds that hold futures contracts, as the futures contracts near expiration, they are generally replaced by contracts that have a later expiration. Thus, for example, a contract purchased and held in August 2012 may specify an October 2012 expiration. For an Ultra Fund and a Matching VIX Fund, as that contract nears expiration, it may be replaced by selling the October 2012 contract and purchasing the contract expiring in December 2012. This process is referred to as “rolling.” Rolling may have a positive or negative impact on performance. For example, historically, the prices of certain types of futures contracts have frequently been higher for contracts with shorter-term expirations than for contracts with longer-term expirations, which is referred to as “backwardation.” In these circumstances, absent other factors, the sale of the October 2012 contract would take place at a price that is higher than the price at which the December 2012 contract is purchased, thereby creating a gain in connection with rolling. While certain types of futures contracts have historically exhibited consistent periods of backwardation, backwardation will likely not exist in these markets at all times. The presence of contango (where prices of contracts are higher in the distant delivery months than in the nearer delivery months due to the costs of long-term storage of a physical commodity prior to delivery or other factors) in certain futures contracts at the time of rolling would be expected to adversely affect an Ultra Fund or a Matching VIX Fund that invests in such futures, and positively affect a Short Fund or an UltraShort Fund that invests in such futures. Similarly, the presence of backwardation in certain futures contracts at the time of rolling such contracts would be expected to adversely affect the Short Funds and UltraShort Funds, and positively affect the Ultra Funds and Matching VIX Funds. | |
| Since the introduction of VIX futures contracts, there have frequently been periods where VIX futures prices reflect higher expected volatility levels further out in time. This can result in a loss from “rolling” the VIX futures to maintain the constant weighted average maturity of the VIX Futures Index. Losses from exchanging a lower priced VIX future for a higher priced longer-term future in the rolling process would adversely affect the value of each VIX Futures Index and, accordingly, decrease the return of the Ultra VIX Short-Term Futures ETF and the Matching VIX Funds. | |
| Gold and silver historically exhibit persistent “contango” markets rather than backwardation. Natural gas, like crude oil, moves in and out of backwardation and contango but historically has been in contango most commonly. It is generally believed this is because the market needs to build inventories for most of the year in order to have enough storage to make it through a normal winter. Periods of backwardation are typically thought to be caused by demand shocks or supply shortages such as an unusually cold winter or a hurricane. | |
Subsequent_Events
| Subsequent Events | 9 Months Ended |
| Sep. 30, 2013 | |
| Subsequent Events [Abstract] | ' |
| Subsequent Events | ' |
| NOTE 9 – SUBSEQUENT EVENTS | |
| Management has evaluated the possibility of subsequent events existing in the Trust’s and the Funds’ financial statements through the date the financial statements were issued. Management has determined that there are no material events that would require disclosure in the Trust’s or the Funds’ financial statements through this date. | |
Significant_Accounting_Policie1
| Significant Accounting Policies (Policies) | 9 Months Ended | ||||||||||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||||||||||
| Accounting Policies [Abstract] | ' | ||||||||||||||||||||||||
| Use of Estimates & Indemnifications | ' | ||||||||||||||||||||||||
| Use of Estimates & Indemnifications | |||||||||||||||||||||||||
| The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in these financial statements. Actual results could differ from those estimates. | |||||||||||||||||||||||||
| In the normal course of business, the Trust enters into contracts that contain a variety of representations which provide general indemnifications. The Trust’s maximum exposure under these arrangements cannot be known; however, the Trust expects any risk of loss to be remote. | |||||||||||||||||||||||||
| Basis of Presentation | ' | ||||||||||||||||||||||||
| Basis of Presentation | |||||||||||||||||||||||||
| Pursuant to rules and regulations of the SEC, financial statements are presented for the Trust as a whole, as the SEC registrant, and for each Fund individually. The debts, liabilities, obligations and expenses incurred, contracted for or otherwise existing with respect to a particular Fund shall be enforceable only against the assets of such Fund and not against the assets of the Trust generally or any other Fund. Accordingly, the assets of one Fund of the Trust include only those funds and other assets that are paid to, held by or distributed to the Trust for the purchase of Shares in that Fund. | |||||||||||||||||||||||||
| Statement of Cash Flows | ' | ||||||||||||||||||||||||
| Statement of Cash Flows | |||||||||||||||||||||||||
| The cash amount shown in the Statements of Cash Flows is the amount reported as cash in the Statement of Financial Condition dated September 30, 2013, and represents non-segregated cash with the custodian and does not include short-term investments. | |||||||||||||||||||||||||
| Final Net Asset Value for Fiscal Period | ' | ||||||||||||||||||||||||
| Final Net Asset Value for Fiscal Period | |||||||||||||||||||||||||
| The times of the calculation of the Leveraged Funds’, the Short Euro Fund’s, the Geared VIX Funds’ and the Matching VIX Funds’ final net asset value for creation and redemption of fund Shares for the three months and nine months ended September 30, 2013 were as follows. All times are Eastern Standard Time: | |||||||||||||||||||||||||
| NAV Calculation Time | NAV Calculation Date | ||||||||||||||||||||||||
| UltraShort Silver, Ultra Silver | 7:00 A.M. | September 30 | |||||||||||||||||||||||
| UltraShort Gold, Ultra Gold | 10:00 A.M. | September 30 | |||||||||||||||||||||||
| UltraShort DJ-UBS Crude Oil, Ultra DJ-UBS Crude Oil | 2:30 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort DJ-UBS Natural Gas, Ultra DJ-UBS Natural Gas | 2:30 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort DJ-UBS Commodity, Ultra DJ-UBS Commodity | 3:00 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort Australian Dollar, Ultra Australian Dollar | 4:00 P.M. | September 30 | |||||||||||||||||||||||
| Short Euro, UltraShort Euro, Ultra Euro | 4:00 P.M. | September 30 | |||||||||||||||||||||||
| UltraShort Yen, Ultra Yen | 4:00 P.M. | September 30 | |||||||||||||||||||||||
| VIX Short-Term Futures ETF, Ultra VIX Short-Term Futures ETF, Short VIX Short-Term Futures ETF | 4:15 P.M. | September 30 | |||||||||||||||||||||||
| VIX Mid-Term Futures ETF | 4:15 P.M. | September 30 | |||||||||||||||||||||||
| Although the Leveraged Funds’, the Short Euro Fund’s, the Geared VIX Funds’ and the Matching VIX Funds’ Shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the three months and nine months ended September 30, 2013. | |||||||||||||||||||||||||
| Market value per Share is determined at the close of the NYSE Arca and may be later than when the Funds’ NAV per Share is calculated. | |||||||||||||||||||||||||
| For financial reporting purposes, the Leveraged Funds, the Short Euro Fund, and the VIX Funds value transactions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements may differ from those used in the calculation of certain Leveraged Funds’, the Short Euro Fund’s and VIX Funds’ final creation/redemption NAV for the three months and nine months ended September 30, 2013. | |||||||||||||||||||||||||
| Investment Valuation | ' | ||||||||||||||||||||||||
| Investment Valuation | |||||||||||||||||||||||||
| Short-term investments are valued at amortized cost which approximates fair value for daily NAV purposes. For financial reporting purposes, short-term investments are valued at their market price using information provided by a third-party pricing service or market quotations. In each of these situations, valuations are typically categorized as Level I in the fair value hierarchy. | |||||||||||||||||||||||||
| Derivatives (e.g., futures contracts, swap agreements, forward agreements and foreign currency forward contracts) are generally valued using independent sources and/or agreements with counterparties or other procedures as determined by the Sponsor. Futures contracts, except for those entered into by the Gold, Silver, Australian Dollar and Short Euro Funds, are generally valued at the last settled price on the applicable exchange on which that future trades. Futures contracts entered into by the Gold, Silver, Australian Dollar and Short Euro Funds are valued at the last sales price prior to the time at which the NAV per Share of a Fund is determined. For financial reporting purposes, all futures contracts are valued at the last settled price. Futures contracts valuations are typically categorized as Level I in the fair value hierarchy. Swap agreements, forward agreements and foreign currency forward contracts valuations are typically categorized as Level II in the fair value hierarchy. If there was no sale on that day, and for non-exchange-traded derivatives, the Sponsor may in its sole discretion choose to determine a fair value price as the basis for determining the market value of such position for such day. Such fair value prices would be generally determined based on available inputs about the current value of the underlying financial instrument or commodity and would be based on principles that the Sponsor deems fair and equitable so long as such principles are consistent with normal industry standards. When market closing prices are not available, the Sponsor may fair value an asset of a Fund pursuant to the policies the Sponsor has adopted, which are consistent with normal industry standards. Depending on the source and relevant significance of valuation inputs, these instruments may be classified as Level II or Level III in the fair value hierarchy. | |||||||||||||||||||||||||
| Fair value pricing may require subjective determinations about the value of an investment. While the Leveraged Funds’, the Short Euro Fund’s and the VIX Funds’ policies are intended to result in a calculation of a Leveraged Fund’s, the Short Euro Fund’s or a VIX Fund’s NAV that fairly reflects investment values as of the time of pricing, a Leveraged Fund, the Short Euro Fund or a VIX Fund cannot ensure that fair values determined by the Sponsor or persons acting at their direction would accurately reflect the price that a Fund could obtain for an investment if it were to dispose of that investment as of the time of pricing (for instance, in a forced or distressed sale). The prices used by a Leveraged Fund, the Short Euro Fund or a VIX Fund may differ from the value that would be realized if the investments were sold and the differences could be material to the financial statements. | |||||||||||||||||||||||||
| Fair Value of Financial Instruments | ' | ||||||||||||||||||||||||
| Fair Value of Financial Instruments | |||||||||||||||||||||||||
| The Funds disclose the fair value of their investments in a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Funds (observable inputs); and (2) the Funds’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements hierarchy are as follows: | |||||||||||||||||||||||||
| Level I – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. | |||||||||||||||||||||||||
| Level II – Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market-corroborated inputs). | |||||||||||||||||||||||||
| Level III – Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. | |||||||||||||||||||||||||
| In some instances, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest input level that is significant to the fair value measurement in its entirety. | |||||||||||||||||||||||||
| Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. | |||||||||||||||||||||||||
| The following table summarizes the valuation of investments at September 30, 2013 using the fair value hierarchy: | |||||||||||||||||||||||||
| Level I - Quoted Prices | Level II - Other Significant Observable Inputs | ||||||||||||||||||||||||
| Short-Term U.S. | Futures | Forward | Foreign | Swap | Total | ||||||||||||||||||||
| Government and | Contracts* | Agreements | Currency | Agreements | |||||||||||||||||||||
| Agencies | Forward | ||||||||||||||||||||||||
| Contracts | |||||||||||||||||||||||||
| UltraShort DJ-UBS Commodity | $ | 3,196,967 | $ | 0 | $ | 0 | $ | 0 | $ | 200,128 | $ | 3,397,095 | |||||||||||||
| UltraShort DJ-UBS Crude Oil | 419,011,935 | 8,716,596 | 0 | 0 | 34,688,207 | 462,416,738 | |||||||||||||||||||
| UltraShort DJ-UBS Natural Gas | 13,658,585 | 467,284 | 0 | 0 | 0 | 14,125,869 | |||||||||||||||||||
| UltraShort Gold | 137,129,907 | (9,400 | ) | 7,782,450 | 0 | 0 | 144,902,957 | ||||||||||||||||||
| UltraShort Silver | 106,048,955 | (2,180 | ) | 9,083,114 | 0 | 0 | 115,129,889 | ||||||||||||||||||
| Short Euro | 6,666,790 | (141,094 | ) | 0 | 0 | 0 | 6,525,696 | ||||||||||||||||||
| UltraShort Australian Dollar | 22,016,137 | (466,612 | ) | 0 | 0 | 0 | 21,549,525 | ||||||||||||||||||
| UltraShort Euro | 482,820,998 | 0 | 0 | (25,932,066 | ) | 0 | 456,888,932 | ||||||||||||||||||
| UltraShort Yen | 475,704,411 | 0 | 0 | (12,519,543 | ) | 0 | 463,184,868 | ||||||||||||||||||
| Ultra DJ-UBS Commodity | 4,107,868 | 0 | 0 | 0 | (237,372 | ) | 3,870,496 | ||||||||||||||||||
| Ultra DJ-UBS Crude Oil | 136,394,297 | (2,710,766 | ) | 0 | 0 | (10,995,019 | ) | 122,688,512 | |||||||||||||||||
| Ultra DJ-UBS Natural Gas | 75,238,008 | 3,434,395 | 0 | 0 | 0 | 78,672,403 | |||||||||||||||||||
| Ultra Gold | 189,669,408 | 9,420 | (17,189,960 | ) | 0 | 0 | 172,488,868 | ||||||||||||||||||
| Ultra Silver | 633,827,603 | 2,180 | (80,087,349 | ) | 0 | 0 | 553,742,434 | ||||||||||||||||||
| Ultra Australian Dollar | 2,999,904 | 70,124 | 0 | 0 | 0 | 3,070,028 | |||||||||||||||||||
| Ultra Euro | 2,290,933 | 0 | 0 | 190,473 | 0 | 2,481,406 | |||||||||||||||||||
| Ultra Yen | 3,118,885 | 0 | 0 | 75,495 | 0 | 3,194,380 | |||||||||||||||||||
| VIX Short-Term Futures ETF | 130,224,349 | 3,220,206 | 0 | 0 | 0 | 133,444,555 | |||||||||||||||||||
| VIX Mid-Term Futures ETF | 77,780,701 | (730,620 | ) | 0 | 0 | 0 | 77,050,081 | ||||||||||||||||||
| Ultra VIX Short-Term Futures ETF | 197,516,820 | 12,992,694 | 0 | 0 | 0 | 210,509,514 | |||||||||||||||||||
| Short VIX Short-Term Futures ETF | 62,307,511 | (3,449,929 | ) | 0 | 0 | 0 | 58,857,582 | ||||||||||||||||||
| Total Trust | 3,181,730,972 | 21,402,298 | (80,411,745 | ) | (38,185,641 | ) | 23,655,944 | 3,108,191,828 | |||||||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts | ||||||||||||||||||||||||
| At September 30, 2013, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. | |||||||||||||||||||||||||
| The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. | |||||||||||||||||||||||||
| The following table summarizes the valuation of investments at December 31, 2012 using the fair value hierarchy: | |||||||||||||||||||||||||
| Level I - Quoted Prices | Level II - Other Significant Observable Inputs | ||||||||||||||||||||||||
| Short-Term U.S. | Futures | Forward | Foreign | Swap | Total | ||||||||||||||||||||
| Government and | Contracts* | Agreements | Currency | Agreements | |||||||||||||||||||||
| Agencies | Forward | ||||||||||||||||||||||||
| Contracts | |||||||||||||||||||||||||
| UltraShort DJ-UBS Commodity | $ | 2,803,904 | $ | — | $ | — | $ | — | $ | 148,502 | $ | 2,952,406 | |||||||||||||
| UltraShort DJ-UBS Crude Oil | 87,046,389 | (4,029,721 | ) | — | — | (5,607,060 | ) | 77,409,608 | |||||||||||||||||
| UltraShort DJ-UBS Natural Gas | 10,042,731 | 409,135 | — | — | — | 10,451,866 | |||||||||||||||||||
| UltraShort Gold | 88,575,398 | 15,240 | 3,729,856 | — | — | 92,320,494 | |||||||||||||||||||
| UltraShort Silver | 86,206,701 | 40,020 | 19,307,685 | — | — | 105,554,406 | |||||||||||||||||||
| Short Euro | 3,409,904 | (55,056 | ) | — | — | — | 3,354,848 | ||||||||||||||||||
| UltraShort Australian Dollar | 3,302,907 | 85,590 | — | — | — | 3,388,497 | |||||||||||||||||||
| UltraShort Euro | 553,430,562 | — | — | (13,147,572 | ) | — | 540,282,990 | ||||||||||||||||||
| UltraShort Yen | 362,743,231 | — | — | 38,114,175 | — | 400,857,406 | |||||||||||||||||||
| Ultra DJ-UBS Commodity | 6,240,951 | — | — | — | (306,268 | ) | 5,934,683 | ||||||||||||||||||
| Ultra DJ-UBS Crude Oil | 437,662,650 | 21,960,410 | — | — | 33,333,620 | 492,956,680 | |||||||||||||||||||
| Ultra DJ-UBS Natural Gas | 64,313,224 | (3,816,950 | ) | — | — | — | 60,496,274 | ||||||||||||||||||
| Ultra Gold | 350,624,904 | (15,240 | ) | (15,652,058 | ) | — | — | 334,957,606 | |||||||||||||||||
| Ultra Silver | 891,057,386 | (40,020 | ) | (145,740,706 | ) | — | — | 745,276,660 | |||||||||||||||||
| Ultra Australian Dollar | 3,570,894 | (99,030 | ) | — | — | — | 3,471,864 | ||||||||||||||||||
| Ultra Euro | 4,546,944 | — | — | 87,159 | — | 4,634,103 | |||||||||||||||||||
| Ultra Yen | 4,587,918 | — | — | (494,296 | ) | — | 4,093,622 | ||||||||||||||||||
| VIX Short-Term Futures ETF | 144,060,921 | (221,419 | ) | — | — | — | 143,839,502 | ||||||||||||||||||
| VIX Mid-Term Futures ETF | 79,930,866 | (1,470,410 | ) | — | — | — | 78,460,456 | ||||||||||||||||||
| Ultra VIX Short-Term Futures ETF | 97,440,843 | 2,057,062 | — | — | 301,351 | 99,799,256 | |||||||||||||||||||
| Short VIX Short-Term Futures ETF | 53,686,352 | (1,387,175 | ) | — | — | — | 52,299,177 | ||||||||||||||||||
| Total Trust | $ | 3,335,285,580 | $ | 13,432,436 | $ | (138,355,223 | ) | $ | 24,559,466 | $ | 27,870,145 | $ | 3,262,792,404 | ||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts | ||||||||||||||||||||||||
| At December 31, 2012, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. | |||||||||||||||||||||||||
| The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. | |||||||||||||||||||||||||
| Investment Transactions and Related Income | ' | ||||||||||||||||||||||||
| Investment Transactions and Related Income | |||||||||||||||||||||||||
| Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized appreciation/depreciation on open contracts are reflected in the Statements of Financial Condition and changes in the unrealized appreciation/depreciation between periods are reflected in the Statements of Operations. Discounts on short-term securities purchased are amortized and reflected as Interest Income in the Statements of Operations. | |||||||||||||||||||||||||
| Brokerage Commissions and Fees | ' | ||||||||||||||||||||||||
| Brokerage Commissions and Fees | |||||||||||||||||||||||||
| Each Fund pays its respective brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities for each Fund’s investment in U.S. Commodity Futures Trading Commission (“CFTC”) regulated investments. The effects of trading spreads, financing costs/fees associated with Financial Instruments, and costs relating to the purchase of U.S. Treasury securities or similar high credit quality short-term fixed-income or similar securities would also be borne by the Funds. Brokerage commissions on futures contracts are recognized on a half-turn basis (e.g., the first half is recognized when the contract is purchased (opened) and the second half is recognized when the transaction is closed). For the nine months ended September 30, 2013 and 2012, the Sponsor paid, and is currently paying, brokerage commissions on VIX futures contracts for the Matching VIX Funds. | |||||||||||||||||||||||||
| Federal Income Tax | ' | ||||||||||||||||||||||||
| Federal Income Tax | |||||||||||||||||||||||||
| Each Fund is registered as a series of a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, no Fund expects to incur U.S. federal income tax liability; rather, each beneficial owner of a Fund’s Shares is required to take into account its allocable share of its Fund’s income, gain, loss, deductions and other items for its Fund’s taxable year ending with or within the beneficial owner’s taxable year. | |||||||||||||||||||||||||
| Management of the Funds has reviewed all open tax years and major jurisdictions (i.e. the last four tax year ends and the interim tax period since then, as applicable) and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Funds are also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management will monitor its tax positions taken under the interpretation to determine if adjustments to conclusions are necessary based on factors including, but not limited to, on-going analysis of tax law, regulation, and interpretations thereof. | |||||||||||||||||||||||||
Organization_Tables
| Organization (Tables) | 9 Months Ended | ||||||
| Sep. 30, 2013 | |||||||
| Accounting Policies [Abstract] | ' | ||||||
| Schedule of Share Splits and Reverse Share Splits | ' | ||||||
| The table below includes Share splits and reverse Share splits for the Funds during the nine months ended September 30, 2013 and year ended December 31, 2012. The ticker symbols for these Funds did not change and each Fund continues to trade on the NYSE Arca. | |||||||
| Fund | Execution Date | Type of Split | Date Trading | ||||
| (Prior to Opening | Resumed at Post- | ||||||
| of Trading) | Split Price | ||||||
| ProShares UltraShort DJ-UBS Natural Gas | May 11, 2012 | 3-for-1 Share split | May 11, 2012 | ||||
| ProShares UltraShort DJ-UBS Natural Gas | 10-Jun-13 | 1-for-4 reverse Share split | 10-Jun-13 | ||||
| ProShares UltraShort Gold | October 5, 2012 | 1-for-4 reverse Share split | October 5, 2012 | ||||
| ProShares UltraShort Silver | May 11, 2012 | 1-for-5 reverse Share split | May 11, 2012 | ||||
| ProShares Ultra DJ-UBS Natural Gas | May 11, 2012 | 1-for-5 reverse Share split | May 11, 2012 | ||||
| ProShares VIX Short-Term Futures ETF | 10-Jun-13 | 1-for-5 reverse Share split | 10-Jun-13 | ||||
| ProShares Ultra VIX Short-Term Futures ETF | March 8, 2012 | 1-for-6 reverse Share split | March 8, 2012 | ||||
| ProShares Ultra VIX Short-Term Futures ETF | September 7, 2012 | 1-for-10 reverse Share split | September 7, 2012 | ||||
| ProShares Ultra VIX Short-Term Futures ETF | 10-Jun-13 | 1-for-10 reverse Share split | 10-Jun-13 | ||||
| ProShares Short VIX Short-Term Futures ETF | October 5, 2012 | 2-for-1 Share split | October 5, 2012 | ||||
Significant_Accounting_Policie2
| Significant Accounting Policies (Tables) | 9 Months Ended | ||||||||||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||||||||||
| Accounting Policies [Abstract] | ' | ||||||||||||||||||||||||
| Calculation of Funds' Final Net Asset Value for Creation and Redemption of Fund Shares | ' | ||||||||||||||||||||||||
| The times of the calculation of the Leveraged Funds’, the Short Euro Fund’s, the Geared VIX Funds’ and the Matching VIX Funds’ final net asset value for creation and redemption of fund Shares for the three months ended September 30, 2013 were as follows. All times are Eastern Standard Time: | |||||||||||||||||||||||||
| NAV Calculation Time | NAV Calculation Date | ||||||||||||||||||||||||
| UltraShort Silver, Ultra Silver | 7:00 A.M. | September 30 | |||||||||||||||||||||||
| UltraShort Gold, Ultra Gold | 10:00 A.M. | 30-Sep | |||||||||||||||||||||||
| UltraShort DJ-UBS Crude Oil, Ultra DJ-UBS Crude Oil | 2:30 P.M. | 30-Sep | |||||||||||||||||||||||
| UltraShort DJ-UBS Natural Gas, Ultra DJ-UBS Natural Gas | 2:30 P.M. | 30-Sep | |||||||||||||||||||||||
| UltraShort DJ-UBS Commodity, Ultra DJ-UBS Commodity | 3:00 P.M. | 30-Sep | |||||||||||||||||||||||
| UltraShort Australian Dollar, Ultra Australian Dollar | 4:00 P.M. | 30-Sep | |||||||||||||||||||||||
| Short Euro, UltraShort Euro, Ultra Euro | 4:00 P.M. | 30-Sep | |||||||||||||||||||||||
| UltraShort Yen, Ultra Yen | 4:00 P.M. | 30-Sep | |||||||||||||||||||||||
| VIX Short-Term Futures ETF, Ultra VIX Short-Term Futures ETF, Short VIX Short-Term Futures ETF | 4:15 P.M. | 30-Sep | |||||||||||||||||||||||
| VIX Mid-Term Futures ETF | 4:15 P.M. | 30-Sep | |||||||||||||||||||||||
| Valuation of Investments | ' | ||||||||||||||||||||||||
| The following table summarizes the valuation of investments at September 30, 2013 using the fair value hierarchy: | |||||||||||||||||||||||||
| Level I - Quoted Prices | Level II - Other Significant Observable Inputs | ||||||||||||||||||||||||
| Short-Term U.S. | Futures | Forward | Foreign | Swap | Total | ||||||||||||||||||||
| Government and | Contracts* | Agreements | Currency | Agreements | |||||||||||||||||||||
| Agencies | Forward | ||||||||||||||||||||||||
| Contracts | |||||||||||||||||||||||||
| UltraShort DJ-UBS Commodity | $ | 3,196,967 | $ | — | $ | — | $ | — | $ | 200,128 | $ | 3,397,095 | |||||||||||||
| UltraShort DJ-UBS Crude Oil | 419,011,935 | 8,716,596 | — | — | 34,688,207 | 462,416,738 | |||||||||||||||||||
| UltraShort DJ-UBS Natural Gas | 13,658,585 | 467,284 | — | — | — | 14,125,869 | |||||||||||||||||||
| UltraShort Gold | 137,129,907 | (9,400 | ) | 7,782,450 | — | — | 144,902,957 | ||||||||||||||||||
| UltraShort Silver | 106,048,955 | (2,180 | ) | 9,083,114 | — | — | 115,129,889 | ||||||||||||||||||
| Short Euro | 6,666,790 | (141,094 | ) | — | — | — | 6,525,696 | ||||||||||||||||||
| UltraShort Australian Dollar | 22,016,137 | (466,612 | ) | — | — | — | 21,549,525 | ||||||||||||||||||
| UltraShort Euro | 482,820,998 | — | — | (25,932,066 | ) | — | 456,888,932 | ||||||||||||||||||
| UltraShort Yen | 475,704,411 | — | — | (12,519,543 | ) | — | 463,184,868 | ||||||||||||||||||
| Ultra DJ-UBS Commodity | 4,107,868 | — | — | — | (237,372 | ) | 3,870,496 | ||||||||||||||||||
| Ultra DJ-UBS Crude Oil | 136,394,297 | (2,710,766 | ) | — | — | (10,995,019 | ) | 122,688,512 | |||||||||||||||||
| Ultra DJ-UBS Natural Gas | 75,238,008 | 3,434,395 | — | — | — | 78,672,403 | |||||||||||||||||||
| Ultra Gold | 189,669,408 | 9,420 | (17,189,960 | ) | — | — | 172,488,868 | ||||||||||||||||||
| Ultra Silver | 633,827,603 | 2,180 | (80,087,349 | ) | — | — | 553,742,434 | ||||||||||||||||||
| Ultra Australian Dollar | 2,999,904 | 70,124 | — | — | — | 3,070,028 | |||||||||||||||||||
| Ultra Euro | 2,290,933 | — | — | 190,473 | — | 2,481,406 | |||||||||||||||||||
| Ultra Yen | 3,118,885 | — | — | 75,495 | — | 3,194,380 | |||||||||||||||||||
| VIX Short-Term Futures ETF | 130,224,349 | 3,220,206 | — | — | — | 133,444,555 | |||||||||||||||||||
| VIX Mid-Term Futures ETF | 77,780,701 | (730,620 | ) | — | — | — | 77,050,081 | ||||||||||||||||||
| Ultra VIX Short-Term Futures ETF | 197,516,820 | 12,992,694 | — | — | — | 210,509,514 | |||||||||||||||||||
| Short VIX Short-Term Futures ETF | 62,307,511 | (3,449,929 | ) | — | — | — | 58,857,582 | ||||||||||||||||||
| Total Trust | 3,181,730,972 | 21,402,298 | (80,411,745 | ) | (38,185,641 | ) | 23,655,944 | 3,108,191,828 | |||||||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||||||||||
| At September 30, 2013, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. | |||||||||||||||||||||||||
| The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. | |||||||||||||||||||||||||
| The following table summarizes the valuation of investments at December 31, 2012 using the fair value hierarchy: | |||||||||||||||||||||||||
| Level I - Quoted Prices | Level II - Other Significant Observable Inputs | ||||||||||||||||||||||||
| Short-Term U.S. | Futures | Forward | Foreign | Swap | Total | ||||||||||||||||||||
| Government and | Contracts* | Agreements | Currency | Agreements | |||||||||||||||||||||
| Agencies | Forward | ||||||||||||||||||||||||
| Contracts | |||||||||||||||||||||||||
| UltraShort DJ-UBS Commodity | $ | 2,803,904 | $ | — | $ | — | $ | — | $ | 148,502 | $ | 2,952,406 | |||||||||||||
| UltraShort DJ-UBS Crude Oil | 87,046,389 | (4,029,721 | ) | — | — | (5,607,060 | ) | 77,409,608 | |||||||||||||||||
| UltraShort DJ-UBS Natural Gas | 10,042,731 | 409,135 | — | — | — | 10,451,866 | |||||||||||||||||||
| UltraShort Gold | 88,575,398 | 15,240 | 3,729,856 | — | — | 92,320,494 | |||||||||||||||||||
| UltraShort Silver | 86,206,701 | 40,020 | 19,307,685 | — | — | 105,554,406 | |||||||||||||||||||
| Short Euro | 3,409,904 | (55,056 | ) | — | — | — | 3,354,848 | ||||||||||||||||||
| UltraShort Australian Dollar | 3,302,907 | 85,590 | — | — | — | 3,388,497 | |||||||||||||||||||
| UltraShort Euro | 553,430,562 | — | — | (13,147,572 | ) | — | 540,282,990 | ||||||||||||||||||
| UltraShort Yen | 362,743,231 | — | — | 38,114,175 | — | 400,857,406 | |||||||||||||||||||
| Ultra DJ-UBS Commodity | 6,240,951 | — | — | — | (306,268 | ) | 5,934,683 | ||||||||||||||||||
| Ultra DJ-UBS Crude Oil | 437,662,650 | 21,960,410 | — | — | 33,333,620 | 492,956,680 | |||||||||||||||||||
| Ultra DJ-UBS Natural Gas | 64,313,224 | (3,816,950 | ) | — | — | — | 60,496,274 | ||||||||||||||||||
| Ultra Gold | 350,624,904 | (15,240 | ) | (15,652,058 | ) | — | — | 334,957,606 | |||||||||||||||||
| Ultra Silver | 891,057,386 | (40,020 | ) | (145,740,706 | ) | — | — | 745,276,660 | |||||||||||||||||
| Ultra Australian Dollar | 3,570,894 | (99,030 | ) | — | — | — | 3,471,864 | ||||||||||||||||||
| Ultra Euro | 4,546,944 | — | — | 87,159 | — | 4,634,103 | |||||||||||||||||||
| Ultra Yen | 4,587,918 | — | — | (494,296 | ) | — | 4,093,622 | ||||||||||||||||||
| VIX Short-Term Futures ETF | 144,060,921 | (221,419 | ) | — | — | — | 143,839,502 | ||||||||||||||||||
| VIX Mid-Term Futures ETF | 79,930,866 | (1,470,410 | ) | — | — | — | 78,460,456 | ||||||||||||||||||
| Ultra VIX Short-Term Futures ETF | 97,440,843 | 2,057,062 | — | — | 301,351 | 99,799,256 | |||||||||||||||||||
| Short VIX Short-Term Futures ETF | 53,686,352 | (1,387,175 | ) | — | — | — | 52,299,177 | ||||||||||||||||||
| Total Trust | $ | 3,335,285,580 | $ | 13,432,436 | $ | (138,355,223 | ) | $ | 24,559,466 | $ | 27,870,145 | $ | 3,262,792,404 | ||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||||||||||
Investments_Tables
| Investments (Tables) | 9 Months Ended | ||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||
| Investments Debt And Equity Securities [Abstract] | ' | ||||||||||||||||
| Fair Value of Derivative Instruments | ' | ||||||||||||||||
| Fair Value of Derivative Instruments | |||||||||||||||||
| as of September 30, 2013 | |||||||||||||||||
| Asset Derivatives | Liability Derivatives | ||||||||||||||||
| Derivatives not accounted | Statements | Fund | Unrealized | Statements of | Fund | Unrealized | |||||||||||
| for as hedging instruments | Appreciation | Financial | Depreciation | ||||||||||||||
| of | Condition | ||||||||||||||||
| Location | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Location | |||||||||||||||||
| Commodities Contracts | Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 200,128 | Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements | ProShares UltraShort Gold | $ | 9,400 | * | ||||||||
| ProShares UltraShort Silver | 2,180 | * | |||||||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | 43,404,803 | * | |||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 467,284 | * | ProShares Ultra DJ-UBS Commodity | 237,372 | |||||||||||||
| ProShares UltraShort Gold | 7,782,450 | ProShares Ultra DJ-UBS Crude Oil | 13,705,785 | * | |||||||||||||
| ProShares UltraShort Silver | 9,083,114 | ProShares Ultra Gold | 17,189,960 | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | 3,434,395 | * | ProShares Ultra Silver | 80,087,349 | |||||||||||||
| ProShares Ultra Gold | 9,420 | * | |||||||||||||||
| ProShares Ultra Silver | 2,180 | * | |||||||||||||||
| Foreign Exchange Contracts | Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts | ProShares UltraShort Euro | 1,643,765 | Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts | ProShares Short Euro | 141,094 | * | ||||||||||
| ProShares UltraShort Yen | 793,507 | ProShares UltraShort Australian Dollar | 466,612 | * | |||||||||||||
| ProShares Ultra Australian Dollar | 70,124 | * | ProShares UltraShort Euro | 27,575,831 | |||||||||||||
| ProShares UltraShort Yen | 13,313,050 | ||||||||||||||||
| ProShares Ultra Euro | 198,744 | ||||||||||||||||
| ProShares Ultra Yen | 78,715 | ProShares Ultra Euro | 8,271 | ||||||||||||||
| ProShares Ultra Yen | 3,220 | ||||||||||||||||
| VIX Futures Contracts | Receivables on open futures contracts | ProShares VIX Short-Term | 3,316,326 | * | Payable on open futures contracts | ProShares VIX Short-Term Futures ETF | 96,120 | * | |||||||||
| Futures ETF | |||||||||||||||||
| ProShares VIX Mid-Term Futures ETF | 271,990 | * | ProShares VIX Mid-Term Futures ETF | 1,002,610 | * | ||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | 12,992,694 | * | ProShares Short VIX Short-Term Futures ETF | 3,449,929 | * | ||||||||||||
| Total Trust | $ | 83,749,639* | Total Trust | $ | 157,288,783* | ||||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||
| Fair Value of Derivative Instruments | |||||||||||||||||
| as of December 31, 2012 | |||||||||||||||||
| Asset Derivatives | Liability Derivatives | ||||||||||||||||
| Derivatives not accounted | Statements | Fund | Unrealized | Statements of | Fund | Unrealized | |||||||||||
| for as hedging instruments | Appreciation | Financial | Depreciation | ||||||||||||||
| of | Condition | ||||||||||||||||
| Location | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Location | |||||||||||||||||
| Commodities Contracts | Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 148,502 | Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements | ProShares UltraShort DJ-UBS Crude Oil | $ | 9,636,781* | |||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 409,135 | * | ProShares Ultra DJ-UBS Commodity | 306,268 | |||||||||||||
| ProShares UltraShort Gold | 3,745,096 | * | ProShares Ultra DJ-UBS Natural Gas | 3,816,950 | * | ||||||||||||
| ProShares UltraShort Silver | 19,347,705 | * | ProShares Ultra Gold | 15,667,298 | * | ||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 55,294,030 | * | ProShares Ultra Silver | 145,780,726 | * | ||||||||||||
| Foreign Exchange Contracts | Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts | ProShares UltraShort | 85,590 | * | Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts | ProShares Short Euro | 55,056 | * | |||||||||
| Australian Dollar | |||||||||||||||||
| ProShares UltraShort Euro | 251,047 | ProShares UltraShort Euro | 13,398,619 | ||||||||||||||
| ProShares UltraShort Yen | 38,346,817 | ProShares UltraShort Yen | 232,642 | ||||||||||||||
| ProShares Ultra Euro | 89,473 | ProShares Ultra Australian Dollar | 99,030 | * | |||||||||||||
| ProShares Ultra Yen | 13,523 | ProShares Ultra Euro | 2,314 | ||||||||||||||
| ProShares Ultra Yen | 507,819 | ||||||||||||||||
| VIX Futures Contracts | Receivables on open futures contracts, unrealized appreciation on swap agreements | ProShares VIX Short-Term Futures ETF | 2,368,824 | * | Payable on open futures contracts, unrealized depreciation on swap agreements | ProShares VIX Short-Term Futures ETF | 2,590,243 | * | |||||||||
| ProShares VIX Mid-Term Futures ETF | 233,160 | * | ProShares VIX Mid-Term Futures ETF | 1,703,570 | * | ||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | 4,034,873 | * | ProShares Ultra VIX Short-Term Futures ETF | 1,676,460 | * | ||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 627,059 | * | ProShares Short VIX Short-Term Futures ETF | 2,014,234 | * | ||||||||||||
| Total Trust | $ | 124,994,834 | * | Total Trust | $ | 197,488,010 | * | ||||||||||
| * | Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. | ||||||||||||||||
| Effect of Derivative Instruments on Statements of Operations | ' | ||||||||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the three months ended September 30, 2013 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | on Derivatives | Appreciation or | |||||||||||||||
| (Loss) on Derivatives | Recognized in Income | Depreciation on | |||||||||||||||
| Recognized in Income | Derivatives Recognized in | ||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in | ProShares UltraShort DJ-UBS Commodity | $ | 13,664 | $ | (212,120 | ) | ||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | (86,184,111 | ) | 44,663,321 | ||||||||||||||
| unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Natural Gas | 2,862,705 | (1,862,190 | ) | |||||||||||||
| ProShares UltraShort Gold | 6,021,147 | (44,053,880 | ) | ||||||||||||||
| ProShares UltraShort Silver | 6,003,481 | (32,088,651 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Commodity | (85,078 | ) | 233,903 | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 53,589,084 | (18,204,607 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | (14,491,916 | ) | 9,380,633 | ||||||||||||||
| ProShares Ultra Gold | (5,910,890 | ) | 36,566,124 | ||||||||||||||
| ProShares Ultra Silver | 28,400,072 | 96,489,190 | |||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in | ProShares Short Euro | (39,024 | ) | (208,707 | ) | |||||||||||
| ProShares UltraShort Australian Dollar | 389,254 | (1,865,253 | ) | ||||||||||||||
| unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort Euro | (8,625,860 | ) | (30,678,790 | ) | ||||||||||||
| ProShares UltraShort Yen | (5,693,424 | ) | (8,391,457 | ) | |||||||||||||
| ProShares Ultra Australian Dollar | (123,128 | ) | 277,231 | ||||||||||||||
| ProShares Ultra Euro | 41,105 | 227,504 | |||||||||||||||
| ProShares Ultra Yen | (20,255 | ) | 65,431 | ||||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts/changes in unrealized appreciation/depreciation on futures contracts | ProShares VIX Short-Term Futures ETF | (58,627,489 | ) | 1,983,669 | ||||||||||||
| ProShares VIX Mid-Term Futures ETF | (6,929,719 | ) | (6,313,054 | ) | |||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (197,375,157 | ) | 9,751,723 | ||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 37,631,293 | (2,816,258 | ) | ||||||||||||||
| Total Trust | $ | (249,154,246 | ) | $ | 52,943,762 | ||||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the three months ended September 30, 2012 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | on Derivatives | Appreciation or | |||||||||||||||
| (Loss) on Derivatives | Recognized in Income | Depreciation on | |||||||||||||||
| Recognized in Income | Derivatives Recognized in | ||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in | ProShares UltraShort DJ-UBS Commodity | $ | (861,786 | ) | $ | 206,641 | ||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | (24,455,424 | ) | 10,033,896 | ||||||||||||||
| unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Natural Gas | (4,766,026 | ) | 1,018,440 | |||||||||||||
| ProShares UltraShort Gold | (10,990,296 | ) | (13,890,127 | ) | |||||||||||||
| ProShares UltraShort Silver | (30,586,333 | ) | (36,561,134 | ) | |||||||||||||
| ProShares Ultra DJ-UBS Commodity | 1,946,086 | (418,834 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 93,595,260 | (32,720,374 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | 20,880,016 | (5,822,190 | ) | ||||||||||||||
| ProShares Ultra Gold | 23,189,203 | 47,317,620 | |||||||||||||||
| ProShares Ultra Silver | 159,543,701 | 205,647,219 | |||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on foreign currency forward and futures contracts/changes in | ProShares Short Euro | (102,555 | ) | 36,694 | ||||||||||||
| ProShares UltraShort | (123,485 | ) | 1,140 | ||||||||||||||
| unrealized appreciation/ depreciation on foreign | |||||||||||||||||
| Australian Dollar | |||||||||||||||||
| currency forward and futures contracts | ProShares UltraShort Euro | (14,572,815 | ) | (12,582,909 | ) | ||||||||||||
| ProShares UltraShort Yen | (4,756,665 | ) | (6,717,569 | ) | |||||||||||||
| ProShares Ultra | 99,030 | (1,930 | ) | ||||||||||||||
| Australian Dollar | |||||||||||||||||
| ProShares Ultra Euro | 55,097 | 100,337 | |||||||||||||||
| ProShares Ultra Yen | 90,137 | 146,755 | |||||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation/ depreciation on futures contracts and swap agreements | ProShares VIX Short-Term Futures ETF | (85,611,502 | ) | 13,014,580 | ||||||||||||
| ProShares VIX Mid-Term Futures ETF | (19,925,729 | ) | (7,586,879 | ) | |||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (299,188,874 | ) | 39,590,749 | ||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 10,269,196 | (146,485 | ) | ||||||||||||||
| Total Trust | $ | (186,273,764 | ) | $ | 200,665,640 | ||||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the nine months ended September 30, 2013 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | (Loss) on Derivatives | on Derivatives | Appreciation or | ||||||||||||||
| Recognized in Income | Recognized in Income | Depreciation on | |||||||||||||||
| Derivatives Recognized in | |||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 472,331 | $ | 51,626 | |||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | (91,283,615 | ) | 53,041,584 | ||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 254,565 | 58,149 | |||||||||||||||
| ProShares UltraShort Gold | 39,762,664 | 4,027,954 | |||||||||||||||
| ProShares UltraShort Silver | 86,823,320 | (10,266,771 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Commodity | (868,053 | ) | 68,896 | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | 140,887,078 | (68,999,815 | ) | ||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | 410,025 | 7,251,345 | |||||||||||||||
| ProShares Ultra Gold | (124,334,744 | ) | (1,513,242 | ) | |||||||||||||
| ProShares Ultra Silver | (509,899,199 | ) | 65,695,557 | ||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements | ProShares Short Euro | (114,962 | ) | (86,038 | ) | |||||||||||
| ProShares UltraShort Australian Dollar | 2,294,351 | (552,202 | ) | ||||||||||||||
| ProShares UltraShort Euro | (19,722,590 | ) | (12,784,494 | ) | |||||||||||||
| ProShares UltraShort Yen | 139,331,278 | (50,633,718 | ) | ||||||||||||||
| ProShares Ultra Australian Dollar | (863,033 | ) | 169,154 | ||||||||||||||
| ProShares Ultra Euro | 12,734 | 103,314 | |||||||||||||||
| ProShares Ultra Yen | (1,694,827 | ) | 569,791 | ||||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation/depreciation on futures contracts | ProShares VIX Short-Term Futures ETF | (102,880,094 | ) | 3,441,625 | ||||||||||||
| ProShares VIX Mid-Term Futures ETF | (19,676,804 | ) | 739,790 | ||||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (302,301,436 | ) | 10,634,281 | ||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 58,706,439 | (2,062,754 | ) | ||||||||||||||
| Total Trust | $ | (704,684,572 | ) | $ | (1,045,968 | ) | |||||||||||
| The Effect of Derivative Instruments on the Statements of Operations | |||||||||||||||||
| For the nine months ended September 30, 2012 | |||||||||||||||||
| Derivatives not accounted for as | Location of Gain or | Fund | Realized Gain or (Loss) | Change in Unrealized | |||||||||||||
| hedging instruments | (Loss) on Derivatives | on Derivatives | Appreciation or | ||||||||||||||
| Recognized in Income | Recognized in Income | Depreciation on | |||||||||||||||
| Derivatives Recognized in | |||||||||||||||||
| Income | |||||||||||||||||
| Commodity Contracts | Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/depreciation on futures contracts, swap and/or forward agreements | ProShares UltraShort DJ-UBS Commodity | $ | 653,141 | $ | (684,284 | ) | ||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | 26,044,945 | 4,442,707 | |||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | 1,537,148 | (4,183,090 | ) | ||||||||||||||
| ProShares UltraShort Gold | (9,278,044 | ) | (42,573,500 | ) | |||||||||||||
| ProShares UltraShort Silver | (27,207,872 | ) | (57,618,849 | ) | |||||||||||||
| ProShares Ultra DJ-UBS Commodity | (234,500 | ) | 974,662 | ||||||||||||||
| ProShares Ultra DJ-UBS Crude Oil | (3,020,461 | ) | (7,248,434 | ) | |||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | (5,782,759 | ) | 13,594,580 | ||||||||||||||
| ProShares Ultra Gold | (27,072,137 | ) | 111,555,849 | ||||||||||||||
| ProShares Ultra Silver | (51,743,422 | ) | 269,693,740 | ||||||||||||||
| Foreign Exchange Contracts | Net realized gain (loss) on foreign currency forward and futures contracts/changes in unrealized appreciation/depreciation on foreign currency forward and futures contracts | ProShares Short Euro | (104,555 | ) | (13,619 | ) | |||||||||||
| ProShares UltraShort | (123,485 | ) | 1,140 | ||||||||||||||
| Australian Dollar | |||||||||||||||||
| ProShares UltraShort Euro | 106,381,285 | (102,605,174 | ) | ||||||||||||||
| ProShares UltraShort Yen | 5,696,143 | 1,720,295 | |||||||||||||||
| ProShares Ultra | 99,030 | (1,930 | ) | ||||||||||||||
| Australian Dollar | |||||||||||||||||
| ProShares Ultra Euro | (811,701 | ) | 740,490 | ||||||||||||||
| ProShares Ultra Yen | (131,047 | ) | (56,350 | ) | |||||||||||||
| VIX Futures Contracts | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation/ depreciation on futures contracts and swap agreements | ProShares VIX Short-Term Futures ETF | (137,705,726 | ) | (3,298,001 | ) | |||||||||||
| ProShares VIX Mid-Term Futures ETF | (45,669,199 | ) | (7,611,689 | ) | |||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | (477,920,473 | ) | (19,836,074 | ) | |||||||||||||
| ProShares Short VIX Short-Term Futures ETF | 14,345,508 | 439,437 | |||||||||||||||
| Total Trust | $ | (632,048,181 | ) | $ | 157,431,906 | ||||||||||||
| Offsetting of Financial Assets and Derivative Assets | ' | ||||||||||||||||
| ProShares UltraShort DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 200,128 | $ | — | $ | 200,128 | |||||||||||
| Total | $ | 200,128 | $ | — | $ | 200,128 | |||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 148,502 | $ | — | $ | 148,502 | |||||||||||
| Total | $ | 148,502 | $ | — | $ | 148,502 | |||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 2,100,651 | $ | — | $ | 2,100,651 | |||||||||||
| Swap agreements | 34,688,207 | — | 34,688,207 | ||||||||||||||
| Total | $ | 36,788,858 | $ | — | $ | 36,788,858 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 45,312 | $ | — | $ | 45,312 | |||||||||||
| Total | $ | 45,312 | $ | — | $ | 45,312 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 632,777 | $ | — | $ | 632,777 | |||||||||||
| Total | $ | 632,777 | $ | — | $ | 632,777 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Gold | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 7,782,450 | $ | — | $ | 7,782,450 | |||||||||||
| Futures contracts* | 2,440 | — | 2,440 | ||||||||||||||
| Total | $ | 7,784,890 | $ | — | $ | 7,784,890 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 3,729,856 | $ | — | $ | 3,729,856 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 3,729,856 | $ | — | $ | 3,729,856 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Silver | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 9,083,114 | $ | — | $ | 9,083,114 | |||||||||||
| Futures contracts* | 580 | — | 580 | ||||||||||||||
| Total | $ | 9,083,694 | $ | — | $ | 9,083,694 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 19,307,685 | $ | — | $ | 19,307,685 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 19,307,685 | $ | — | $ | 19,307,685 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Short Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 6,612 | $ | — | $ | 6,612 | |||||||||||
| Total | $ | 6,612 | $ | — | $ | 6,612 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Australian Dollar | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares UltraShort Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 1,643,765 | $ | — | $ | 1,643,765 | |||||||||||
| Total | $ | 1,643,765 | $ | — | $ | 1,643,765 | |||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 251,047 | $ | — | $ | 251,047 | |||||||||||
| Total | $ | 251,047 | $ | — | $ | 251,047 | |||||||||||
| ProShares UltraShort Yen | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 793,507 | $ | — | $ | 793,507 | |||||||||||
| Total | $ | 793,507 | $ | — | $ | 793,507 | |||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 38,346,817 | $ | — | $ | 38,346,817 | |||||||||||
| Total | $ | 38,346,817 | $ | — | $ | 38,346,817 | |||||||||||
| ProShares Ultra DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| ProShares Ultra DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 3,430,415 | $ | — | $ | 3,430,415 | |||||||||||
| Swap agreements | 33,333,620 | — | 33,333,620 | ||||||||||||||
| Total | $ | 36,764,035 | $ | — | $ | 36,764,035 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Gold | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 3,980 | — | 3,980 | ||||||||||||||
| Total | $ | 3,980 | $ | — | $ | 3,980 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Silver | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 2,520 | — | 2,520 | ||||||||||||||
| Total | $ | 2,520 | $ | — | $ | 2,520 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Australian Dollar | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 5,180 | $ | — | $ | 5,180 | |||||||||||
| Total | $ | 5,180 | $ | — | $ | 5,180 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 12,000 | $ | — | $ | 12,000 | |||||||||||
| Total | $ | 12,000 | $ | — | $ | 12,000 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra Euro | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 198,744 | $ | — | $ | 198,744 | |||||||||||
| Total | $ | 198,744 | $ | — | $ | 198,744 | |||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 89,473 | $ | — | $ | 89,473 | |||||||||||
| Total | $ | 89,473 | $ | — | $ | 89,473 | |||||||||||
| ProShares Ultra Yen | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 78,715 | $ | — | $ | 78,715 | |||||||||||
| Total | $ | 78,715 | $ | — | $ | 78,715 | |||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 13,523 | $ | — | $ | 13,523 | |||||||||||
| Total | $ | 13,523 | $ | — | $ | 13,523 | |||||||||||
| ProShares VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 7,590,541 | $ | — | $ | 7,590,541 | |||||||||||
| Total | $ | 7,590,541 | $ | — | $ | 7,590,541 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares VIX Mid-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013 | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 1,619,391 | $ | — | $ | 1,619,391 | |||||||||||
| Total | $ | 1,619,391 | $ | — | $ | 1,619,391 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013 | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 30,450,046 | $ | — | $ | 30,450,046 | |||||||||||
| Total | $ | 30,450,046 | $ | — | $ | 30,450,046 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | 301,351 | — | 301,351 | ||||||||||||||
| Total | $ | 301,351 | $ | — | $ | 301,351 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| ProShares Short VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of September 30, 2013 | |||||||||||||||||
| Assets | Gross | Gross Amounts | Net Amounts | ||||||||||||||
| Amounts of | Offset in the | of Assets | |||||||||||||||
| Recognized | Statement of | Presented in | |||||||||||||||
| Assets | Financial | the | |||||||||||||||
| Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Assets and Derivative Assets as of December 31, 2012: | |||||||||||||||||
| Assets | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Assets | |||||||||||||||
| Assets | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 5,524,721 | $ | — | $ | 5,524,721 | |||||||||||
| Total | $ | 5,524,721 | $ | — | $ | 5,524,721 | |||||||||||
| * | Current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts; Cumulative appreciation/depreciation is reported in the Schedule of Investments. | ||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities | ' | ||||||||||||||||
| ProShares UltraShort DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| ProShares UltraShort DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 979,336 | $ | — | $ | 979,336 | |||||||||||
| Swap agreements | 5,607,060 | — | 5,607,060 | ||||||||||||||
| Total | $ | 6,586,396 | $ | — | $ | 6,586,396 | |||||||||||
| ProShares UltraShort DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| ProShares UltraShort Gold | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 3,980 | — | 3,980 | ||||||||||||||
| Total | $ | 3,980 | $ | — | $ | 3,980 | |||||||||||
| ProShares UltraShort Silver | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | — | $ | — | $ | — | |||||||||||
| Futures contracts* | 2,520 | — | 2,520 | ||||||||||||||
| Total | $ | 2,520 | $ | — | $ | 2,520 | |||||||||||
| ProShares Short Euro | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in | |||||||||||||||
| Financial Condition | the Statement | ||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 3,225 | $ | — | $ | 3,225 | |||||||||||
| Total | $ | 3,225 | $ | — | $ | 3,225 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| ProShares UltraShort Australian Dollar | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 36,330 | $ | — | $ | 36,330 | |||||||||||
| Total | $ | 36,330 | $ | — | $ | 36,330 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 10,950 | $ | — | $ | 10,950 | |||||||||||
| Total | $ | 10,950 | $ | — | $ | 10,950 | |||||||||||
| ProShares UltraShort Euro | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 27,575,831 | $ | — | $ | 27,575,831 | |||||||||||
| Total | $ | 27,575,831 | $ | — | $ | 27,575,831 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 13,398,619 | $ | — | $ | 13,398,619 | |||||||||||
| Total | $ | 13,398,619 | $ | — | $ | 13,398,619 | |||||||||||
| ProShares UltraShort Yen | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 13,313,050 | $ | — | $ | 13,313,050 | |||||||||||
| Total | $ | 13,313,050 | $ | — | $ | 13,313,050 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 232,642 | $ | — | $ | 232,642 | |||||||||||
| Total | $ | 232,642 | $ | — | $ | 232,642 | |||||||||||
| ProShares Ultra DJ-UBS Commodity | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 237,372 | $ | — | $ | 237,372 | |||||||||||
| Total | $ | 237,372 | $ | — | $ | 237,372 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Swap agreements | $ | 306,268 | $ | — | $ | 306,268 | |||||||||||
| Total | $ | 306,268 | $ | — | $ | 306,268 | |||||||||||
| ProShares Ultra DJ-UBS Crude Oil | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 772,970 | $ | — | $ | 772,970 | |||||||||||
| Swap agreements | 10,995,019 | — | 10,995,019 | ||||||||||||||
| Total | $ | 11,767,989 | $ | — | $ | 11,767,989 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| ProShares Ultra DJ-UBS Natural Gas | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 1,999,143 | $ | — | $ | 1,999,143 | |||||||||||
| Total | $ | 1,999,143 | $ | — | $ | 1,999,143 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 4,891,783 | $ | — | $ | 4,891,783 | |||||||||||
| Total | $ | 4,891,783 | $ | — | $ | 4,891,783 | |||||||||||
| ProShares Ultra Gold | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 17,189,960 | $ | — | $ | 17,189,960 | |||||||||||
| Futures contracts* | 2,440 | — | 2,440 | ||||||||||||||
| Total | $ | 17,192,400 | $ | — | $ | 17,192,400 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 15,652,058 | $ | — | $ | 15,652,058 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 15,652,058 | $ | — | $ | 15,652,058 | |||||||||||
| ProShares Ultra Silver | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 80,087,349 | $ | — | $ | 80,087,349 | |||||||||||
| Futures contracts* | 1,780 | — | 1,780 | ||||||||||||||
| Total | $ | 80,089,129 | $ | — | $ | 80,089,129 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Forward agreements | $ | 145,740,706 | $ | — | $ | 145,740,706 | |||||||||||
| Futures contracts* | — | — | — | ||||||||||||||
| Total | $ | 145,740,706 | $ | — | $ | 145,740,706 | |||||||||||
| ProShares Ultra Australian Dollar | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| ProShares Ultra Euro | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 8,271 | $ | — | $ | 8,271 | |||||||||||
| Total | $ | 8,271 | $ | — | $ | 8,271 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 2,314 | $ | — | $ | 2,314 | |||||||||||
| Total | $ | 2,314 | $ | — | $ | 2,314 | |||||||||||
| ProShares Ultra Yen | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 3,220 | $ | — | $ | 3,220 | |||||||||||
| Total | $ | 3,220 | $ | — | $ | 3,220 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts | ||||||||||||||
| of Recognized | Offset in the | of | |||||||||||||||
| Liabilities | Statement of | Liabilities | |||||||||||||||
| Financial Condition | Presented in the | ||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Foreign currency forward contracts | $ | 507,819 | $ | — | $ | 507,819 | |||||||||||
| Total | $ | 507,819 | $ | — | $ | 507,819 | |||||||||||
| ProShares VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 31,540,181 | $ | — | $ | 31,540,181 | |||||||||||
| Total | $ | 31,540,181 | $ | — | $ | 31,540,181 | |||||||||||
| ProShares VIX Mid-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 1,890,675 | $ | — | $ | 1,890,675 | |||||||||||
| Total | $ | 1,890,675 | $ | — | $ | 1,890,675 | |||||||||||
| ProShares Ultra VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 35,666,735 | $ | — | $ | 35,666,735 | |||||||||||
| Swap agreements | — | — | — | ||||||||||||||
| Total | $ | 35,666,735 | $ | — | $ | 35,666,735 | |||||||||||
| ProShares Short VIX Short-Term Futures ETF | |||||||||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of September 30, 2013 | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | 5,707,549 | $ | — | $ | 5,707,549 | |||||||||||
| Total | $ | 5,707,549 | $ | — | $ | 5,707,549 | |||||||||||
| Offsetting of Financial Liabilities and Derivative Liabilities as of December 31, 2012: | |||||||||||||||||
| Liabilities | Gross Amounts | Gross Amounts | Net Amounts of | ||||||||||||||
| of Recognized | Offset in the | Liabilities | |||||||||||||||
| Liabilities | Statement of | Presented in the | |||||||||||||||
| Financial Condition | Statement of | ||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Futures contracts* | $ | — | $ | — | $ | — | |||||||||||
| Total | $ | — | $ | — | $ | — | |||||||||||
| Financial Liabilities Derivative Liabilities and Collateral Pledged by Counterparty | ' | ||||||||||||||||
| ProShares UltraShort DJ-UBS Commodity | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort DJ-UBS Crude Oil | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 979,336 | $ | — | $ | (979,336 | ) | $ | — | ||||||||
| Goldman Sachs International | 1,880,292 | (1,880,292 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 1,730,366 | (1,730,366 | ) | — | — | ||||||||||||
| UBS AG | 1,996,402 | (1,996,402 | ) | — | — | ||||||||||||
| Total | $ | 6,586,396 | $ | (5,607,060 | ) | $ | (979,336 | ) | $ | — | |||||||
| ProShares UltraShort DJ-UBS Natural Gas | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort Gold | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 3,980 | $ | — | $ | (3,980 | ) | $ | — | ||||||||
| Total | $ | 3,980 | $ | — | $ | (3,980 | ) | $ | — | ||||||||
| ProShares UltraShort Silver | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 2,520 | $ | — | $ | (2,520 | ) | $ | — | ||||||||
| Total | $ | 2,520 | $ | — | $ | (2,520 | ) | $ | — | ||||||||
| ProShares Short Euro | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 3,225 | $ | — | $ | (3,225 | ) | $ | — | ||||||||
| Total | $ | 3,225 | $ | — | $ | (3,225 | ) | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort Australian Dollar | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 36,330 | $ | — | $ | (36,330 | ) | $ | — | ||||||||
| Total | $ | 36,330 | $ | — | $ | (36,330 | ) | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 10,950 | $ | — | $ | (10,950 | ) | $ | — | ||||||||
| Total | $ | 10,950 | $ | — | $ | (10,950 | ) | $ | — | ||||||||
| ProShares UltraShort Euro | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 13,695,213 | $ | (13,695,213 | ) | $ | — | $ | — | ||||||||
| UBS AG | 13,880,618 | (13,880,618 | ) | — | — | ||||||||||||
| Total | $ | 27,575,831 | $ | (27,575,831 | ) | $ | — | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 6,048,832 | $ | (6,048,832 | ) | $ | — | $ | — | ||||||||
| UBS AG | 7,349,787 | (7,349,787 | ) | — | — | ||||||||||||
| Total | $ | 13,398,619 | $ | (13,398,619 | ) | $ | — | $ | — | ||||||||
| ProShares UltraShort Yen | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 7,048,993 | $ | (7,048,993 | ) | $ | — | $ | — | ||||||||
| UBS AG | 6,264,057 | (6,264,057 | ) | — | — | ||||||||||||
| Total | $ | 13,313,050 | $ | (13,313,050 | ) | $ | — | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| UBS AG | $ | 232,642 | $ | (232,642 | ) | $ | — | $ | — | ||||||||
| Total | $ | 232,642 | $ | (232,642 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra DJ-UBS Commodity | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 73,556 | $ | (73,556 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs International | 113,209 | (113,209 | ) | — | — | ||||||||||||
| UBS AG | 50,607 | (50,607 | ) | — | — | ||||||||||||
| Total | $ | 237,372 | $ | (237,372 | ) | $ | — | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 198,117 | $ | (198,117 | ) | $ | — | $ | — | ||||||||
| UBS AG | 108,151 | (108,151 | ) | — | — | ||||||||||||
| Total | $ | 306,268 | $ | (306,268 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra DJ-UBS Crude Oil | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 2,428,302 | $ | (2,428,302 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs & Co. | 772,970 | — | (772,970 | ) | — | ||||||||||||
| Goldman Sachs International | 3,504,152 | (3,504,152 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 1,910,928 | (1,910,928 | ) | — | — | ||||||||||||
| UBS AG | 3,151,637 | (3,151,637 | ) | — | — | ||||||||||||
| Total | $ | 11,767,989 | $ | (10,995,019 | ) | $ | (772,970 | ) | $ | — | |||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares Ultra DJ-UBS Natural Gas | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 1,999,143 | $ | — | $ | (1,999,143 | ) | $ | — | ||||||||
| Total | $ | 1,999,143 | $ | — | $ | (1,999,143 | ) | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 4,891,783 | $ | — | $ | (4,891,783 | ) | $ | — | ||||||||
| Total | $ | 4,891,783 | $ | — | $ | (4,891,783 | ) | $ | — | ||||||||
| ProShares Ultra Gold | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 9,410,748 | $ | (9,410,748 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs & Co. | $ | 2,440 | — | (2,440 | ) | — | |||||||||||
| Goldman Sachs International | 4,079,114 | (4,079,114 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 2,180,790 | (2,180,790 | ) | — | — | ||||||||||||
| UBS AG | 1,519,308 | (1,519,308 | ) | — | — | ||||||||||||
| Total | $ | 17,192,400 | $ | (17,189,960 | ) | $ | (2,440 | ) | $ | — | |||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 4,622,873 | $ | (4,622,873 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs International | 3,678,367 | (3,678,367 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 3,715,989 | (3,715,989 | ) | — | — | ||||||||||||
| UBS AG | 3,634,829 | (3,634,829 | ) | — | — | ||||||||||||
| Total | $ | 15,652,058 | $ | (15,652,058 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra Silver | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 40,058,378 | $ | (40,058,378 | ) | $ | — | $ | — | ||||||||
| Goldman Sachs & Co. | 1,780 | — | (1,780 | ) | — | ||||||||||||
| Goldman Sachs International | 24,037,958 | (24,037,958 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 11,898,455 | (11,898,455 | ) | — | — | ||||||||||||
| UBS AG | 4,092,558 | (4,092,558 | ) | — | — | ||||||||||||
| Total | $ | 80,089,129 | $ | (80,087,349 | ) | $ | (1,780 | ) | $ | — | |||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 44,873,116 | $ | (42,756,218 | ) | $ | — | $ | 2,116,898 | ||||||||
| Goldman Sachs International | 34,491,042 | (34,491,042 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 34,802,217 | (34,802,217 | ) | — | — | ||||||||||||
| UBS AG | 31,574,331 | (31,574,331 | ) | — | — | ||||||||||||
| Total | $ | 145,740,706 | $ | (143,623,808 | ) | $ | — | $ | 2,116,898 | ||||||||
| ProShares Ultra Australian Dollar | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares Ultra Euro | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 6,697 | $ | (6,697 | ) | $ | — | $ | — | ||||||||
| UBS AG | 1,574 | (1,574 | ) | — | — | ||||||||||||
| Total | $ | 8,271 | $ | (8,271 | ) | $ | — | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 635 | $ | (635 | ) | $ | — | $ | — | ||||||||
| UBS AG | 1,679 | (1,679 | ) | — | — | ||||||||||||
| Total | $ | 2,314 | $ | (2,314 | ) | $ | — | $ | — | ||||||||
| ProShares Ultra Yen | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 2,496 | $ | (2,496 | ) | $ | — | $ | — | ||||||||
| UBS AG | 724 | (724 | ) | — | — | ||||||||||||
| Total | $ | 3,220 | $ | (3,220 | ) | $ | — | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 231,047 | $ | (231,047 | ) | $ | — | $ | — | ||||||||
| UBS AG | 276,772 | (178,999 | ) | — | 97,773 | ||||||||||||
| Total | $ | 507,819 | $ | (410,046 | ) | $ | — | $ | 97,773 | ||||||||
| ProShares VIX Short-Term Futures ETF | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 31,540,181 | $ | — | $ | (31,540,181 | ) | $ | — | ||||||||
| Total | $ | 31,540,181 | $ | — | $ | (31,540,181 | ) | $ | — | ||||||||
| ProShares VIX Mid-Term Futures ETF | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 1,890,675 | $ | — | $ | (1,890,675 | ) | $ | — | ||||||||
| Total | $ | 1,890,675 | $ | — | $ | (1,890,675 | ) | $ | — | ||||||||
| ProShares Ultra VIX Short-Term Futures ETF | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Liabilities | Instruments | Pledged | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 35,666,735 | $ | — | $ | (35,666,735 | ) | $ | — | ||||||||
| Total | $ | 35,666,735 | $ | — | $ | (35,666,735 | ) | $ | — | ||||||||
| ProShares Short VIX Short-Term Futures ETF | |||||||||||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 5,707,549 | $ | — | $ | (5,707,549 | ) | $ | — | ||||||||
| Total | $ | 5,707,549 | $ | — | $ | (5,707,549 | ) | $ | — | ||||||||
| Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Liabilities | Instruments | Pledged | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets Derivative Assets and Collateral Held by Counterparty | ' | ||||||||||||||||
| ProShares UltraShort DJ-UBS Commodity | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 71,108 | $ | — | $ | — | $ | 71,108 | |||||||||
| Goldman Sachs International | $ | 100,420 | — | — | 100,420 | ||||||||||||
| UBS AG | 28,600 | — | — | 28,600 | |||||||||||||
| Total | $ | 200,128 | $ | — | $ | — | $ | 200,128 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Assets | Instruments | Received | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 104,181 | $ | — | $ | — | $ | 104,181 | |||||||||
| UBS AG | 44,321 | — | — | 44,321 | |||||||||||||
| Total | $ | 148,502 | $ | — | $ | — | $ | 148,502 | |||||||||
| ProShares UltraShort DJ-UBS Crude Oil | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 10,374,607 | $ | — | $ | (9,400,000 | ) | $ | 974,607 | ||||||||
| Goldman Sachs & Co. | 2,100,651 | — | — | 2,100,651 | |||||||||||||
| Goldman Sachs International | 8,780,104 | (7,893,840 | ) | — | 886,264 | ||||||||||||
| Societe Generale S.A. | 5,485,866 | (5,485,866 | ) | — | — | ||||||||||||
| UBS AG | 10,047,630 | (9,268,674 | ) | — | 778,956 | ||||||||||||
| Total | $ | 36,788,858 | $ | (22,648,380 | ) | $ | (9,400,000 | ) | $ | 4,740,478 | |||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort DJ-UBS Natural Gas | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 45,312 | $ | — | $ | — | $ | 45,312 | |||||||||
| Total | $ | 45,312 | $ | — | $ | — | $ | 45,312 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net | ||||||||||||||
| Assets | Instruments | Received | Amount | ||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 632,777 | $ | — | $ | — | $ | 632,777 | |||||||||
| Total | $ | 632,777 | $ | — | $ | — | $ | 632,777 | |||||||||
| ProShares UltraShort Gold | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 4,474,464 | $ | — | $ | (2,850,000 | ) | $ | 1,624,464 | ||||||||
| Goldman Sachs & Co. | 2,440 | — | — | 2,440 | |||||||||||||
| Goldman Sachs International | 1,765,604 | (1,411,185 | ) | — | 354,419 | ||||||||||||
| Societe Generale S.A. | 935,071 | (935,071 | ) | — | — | ||||||||||||
| UBS AG | 607,311 | (607,311 | ) | — | — | ||||||||||||
| Total | $ | 7,784,890 | $ | (2,953,567 | ) | $ | (2,850,000 | ) | $ | 1,981,323 | |||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 2,389,236 | $ | — | $ | (2,389,236 | ) | $ | — | ||||||||
| Goldman Sachs International | 452,059 | (452,059 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 499,264 | — | (499,264 | ) | — | ||||||||||||
| UBS AG | 389,297 | (347,541 | ) | — | 41,756 | ||||||||||||
| Total | $ | 3,729,856 | $ | (799,600 | ) | $ | (2,888,500 | ) | $ | 41,756 | |||||||
| ProShares UltraShort Silver | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 5,461,114 | $ | — | $ | (5,461,114 | ) | $ | — | ||||||||
| Goldman Sachs & Co. | 580 | — | — | 580 | |||||||||||||
| Goldman Sachs International | 1,249,680 | (1,249,680 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 1,810,591 | (1,810,591 | ) | — | — | ||||||||||||
| UBS AG | 561,729 | (561,729 | ) | — | — | ||||||||||||
| Total | $ | 9,083,694 | $ | (3,622,000 | ) | $ | (5,461,114 | ) | $ | 580 | |||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Deutsche Bank AG | $ | 10,786,801 | $ | — | $ | (10,300,000 | ) | $ | 486,801 | ||||||||
| Goldman Sachs International | 3,141,119 | (3,141,119 | ) | — | — | ||||||||||||
| Societe Generale S.A. | 3,255,649 | — | (3,255,649 | ) | — | ||||||||||||
| UBS AG | 2,124,116 | (2,065,937 | ) | — | 58,179 | ||||||||||||
| Total | $ | 19,307,685 | $ | (5,207,056 | ) | $ | (13,555,649 | ) | $ | 544,980 | |||||||
| ProShares Short Euro | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 6,612 | $ | — | $ | — | $ | 6,612 | |||||||||
| Total | $ | 6,612 | $ | — | $ | — | $ | 6,612 | |||||||||
| ProShares UltraShort Australian Dollar | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares UltraShort Euro | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 1,060,483 | $ | — | $ | — | $ | 1,060,483 | |||||||||
| UBS AG | 583,282 | — | — | 583,282 | |||||||||||||
| Total | $ | 1,643,765 | $ | — | $ | — | $ | 1,643,765 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 251,047 | $ | — | $ | — | $ | 251,047 | |||||||||
| Total | $ | 251,047 | $ | — | $ | — | $ | 251,047 | |||||||||
| ProShares UltraShort Yen | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 718,095 | $ | — | $ | — | $ | 718,095 | |||||||||
| UBS AG | 75,412 | — | — | 75,412 | |||||||||||||
| Total | $ | 793,507 | $ | — | $ | — | $ | 793,507 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 18,518,532 | $ | (14,958,352 | ) | $ | — | $ | 3,560,180 | ||||||||
| UBS AG | 19,828,285 | (17,590,896 | ) | — | 2,237,389 | ||||||||||||
| Total | $ | 38,346,817 | $ | (32,549,248 | ) | $ | — | $ | 5,797,569 | ||||||||
| ProShares Ultra DJ-UBS Commodity | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares Ultra DJ-UBS Crude Oil | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in | |||||||||||||||||
| the Statement of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 3,430,415 | $ | — | $ | — | $ | 3,430,415 | |||||||||
| Goldman Sachs International | 14,334,730 | (11,924,574 | ) | — | 2,410,156 | ||||||||||||
| Societe Generale S.A. | 8,989,866 | — | (8,989,866 | ) | — | ||||||||||||
| UBS AG | 10,009,024 | (8,589,406 | ) | — | 1,419,618 | ||||||||||||
| Total | $ | 36,764,035 | $ | (20,513,980 | ) | $ | (8,989,866 | ) | $ | 7,260,189 | |||||||
| ProShares Ultra DJ-UBS Natural Gas | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares Ultra Gold | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 3,980 | $ | — | $ | — | $ | 3,980 | |||||||||
| Total | $ | 3,980 | $ | — | $ | — | $ | 3,980 | |||||||||
| ProShares Ultra Silver | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs & Co. | $ | 2,520 | $ | — | $ | — | $ | 2,520 | |||||||||
| Total | $ | 2,520 | $ | — | $ | — | $ | 2,520 | |||||||||
| ProShares Ultra Australian Dollar | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 5,180 | $ | — | $ | — | $ | 5,180 | |||||||||
| Total | $ | 5,180 | $ | — | $ | — | $ | 5,180 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 12,000 | $ | — | $ | — | $ | 12,000 | |||||||||
| Total | $ | 12,000 | $ | — | $ | — | $ | 12,000 | |||||||||
| ProShares Ultra Euro | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 55,456 | $ | — | $ | — | $ | 55,456 | |||||||||
| UBS AG | 143,288 | — | — | 143,288 | |||||||||||||
| Total | $ | 198,744 | $ | — | $ | — | $ | 198,744 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 38,327 | $ | — | $ | — | $ | 38,327 | |||||||||
| UBS AG | 51,146 | — | — | 51,146 | |||||||||||||
| Total | $ | 89,473 | $ | — | $ | — | $ | 89,473 | |||||||||
| ProShares Ultra Yen | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013: | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 37,892 | $ | — | $ | — | $ | 37,892 | |||||||||
| UBS AG | 40,823 | — | — | 40,823 | |||||||||||||
| Total | $ | 78,715 | $ | — | $ | — | $ | 78,715 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Goldman Sachs International | $ | 7,325 | $ | — | $ | — | $ | 7,325 | |||||||||
| UBS AG | 6,198 | — | — | 6,198 | |||||||||||||
| Total | $ | 13,523 | $ | — | $ | — | $ | 13,523 | |||||||||
| ProShares VIX Short-Term Futures ETF | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 7,590,541 | $ | — | $ | — | $ | 7,590,541 | |||||||||
| Total | $ | 7,590,541 | $ | — | $ | — | $ | 7,590,541 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares VIX Mid-Term Futures ETF | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 1,619,391 | $ | — | $ | — | $ | 1,619,391 | |||||||||
| Total | $ | 1,619,391 | $ | — | $ | — | $ | 1,619,391 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| ProShares Ultra VIX Short-Term Futures ETF | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement of | |||||||||||||||||
| Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 30,450,046 | $ | — | $ | — | $ | 30,450,046 | |||||||||
| Total | $ | 30,450,046 | $ | — | $ | — | $ | 30,450,046 | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| Societe Generale S.A. | $ | 301,351 | $ | — | $ | 301,351 | $ | — | |||||||||
| Total | $ | 301,351 | $ | — | $ | 301,351 | $ | — | |||||||||
| ProShares Short VIX Short-Term Futures ETF | |||||||||||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of September 30, 2013 | |||||||||||||||||
| Gross Amounts Not Offset in the Statement | |||||||||||||||||
| of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets Presented | Instruments | Received | |||||||||||||||
| in the Statement | |||||||||||||||||
| of Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| $ | — | $ | — | $ | — | $ | — | ||||||||||
| Total | $ | — | $ | — | $ | — | $ | — | |||||||||
| Financial Assets, Derivative Assets, and Collateral Held by Counterparty as of December 31, 2012: | |||||||||||||||||
| Gross Amounts Not Offset in the | |||||||||||||||||
| Statement of Financial Condition | |||||||||||||||||
| Net Amounts of | Financial | Cash Collateral | Net Amount | ||||||||||||||
| Assets | Instruments | Received | |||||||||||||||
| Presented in the | |||||||||||||||||
| Statement of | |||||||||||||||||
| Financial | |||||||||||||||||
| Condition | |||||||||||||||||
| RBC Capital Markets | $ | 5,524,721 | $ | — | $ | — | $ | 5,524,721 | |||||||||
| Total | $ | 5,524,721 | $ | — | $ | — | $ | 5,524,721 | |||||||||
Creation_and_Redemption_of_Cre1
| Creation and Redemption of Creation Units (Tables) | 9 Months Ended | ||||||||
| Sep. 30, 2013 | |||||||||
| Text Block [Abstract] | ' | ||||||||
| Schedule of Transaction Fees | ' | ||||||||
| Transaction fees for the three and nine months ended September 30, 2013, which are included in the Sale and/or Redemption of Shares on the Statements of Changes in Shareholders’ Equity, were as follows: | |||||||||
| Fund | Three Months Ended | Nine Months Ended | |||||||
| September 30, 2013 | September 30, 2013 | ||||||||
| UltraShort DJ-UBS Commodity | $ | — | $ | — | |||||
| UltraShort DJ-UBS Crude Oil | 119,865 | 237,750 | |||||||
| UltraShort DJ-UBS Natural Gas | 1,251 | 5,700 | |||||||
| UltraShort Gold | 19,262 | 62,352 | |||||||
| UltraShort Silver | 43,020 | 111,025 | |||||||
| Short Euro | — | — | |||||||
| UltraShort Australian Dollar | — | — | |||||||
| UltraShort Euro | — | — | |||||||
| UltraShort Yen | — | — | |||||||
| Ultra DJ-UBS Commodity | — | 283 | |||||||
| Ultra DJ-UBS Crude Oil | 41,709 | 188,267 | |||||||
| Ultra DJ-UBS Natural Gas | 8,303 | 25,719 | |||||||
| Ultra Gold | 7,284 | 21,066 | |||||||
| Ultra Silver | 25,625 | 91,299 | |||||||
| Ultra Australian Dollar | — | — | |||||||
| Ultra Euro | — | — | |||||||
| Ultra Yen | — | — | |||||||
| VIX Short-Term Futures ETF | — | — | |||||||
| VIX Mid-Term Futures ETF | — | — | |||||||
| Ultra VIX Short-Term Futures ETF | 182,504 | 659,703 | |||||||
| Short VIX Short-Term Futures ETF | 25,366 | 101,646 | |||||||
| Total Trust | $ | 474,189 | $ | 1,504,810 | |||||
Financial_Highlights_Tables
| Financial Highlights (Tables) | 9 Months Ended | ||||||||||||||||||||||||||||
| Sep. 30, 2013 | |||||||||||||||||||||||||||||
| Quarterly Financial Information Disclosure [Abstract] | ' | ||||||||||||||||||||||||||||
| Per Share Operating Performance | ' | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the three months ended September 30, 2013: | |||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort DJ- | UltraShort DJ- | UltraShort DJ- | UltraShort Gold | UltraShort | Short Euro | UltraShort | ||||||||||||||||||||||
| UBS | UBS Crude Oil | UBS Natural | Silver | Australian | |||||||||||||||||||||||||
| Commodity | Gas | Dollar | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2013 | $ | 65.8903 | $ | 36.3393 | $ | 88.5724 | $ | 114.0985 | $ | 110.5972 | $ | 37.9264 | $ | 46.4112 | |||||||||||||||
| Net investment income (loss) | (0.1408 | ) | (0.0691 | ) | (0.2504 | ) | (0.2074 | ) | (0.1902 | ) | (0.0886 | ) | (0.1140 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (3.3059 | ) | (6.0060 | ) | 3.3319 | (25.7822 | ) | (33.8396 | ) | (1.4518 | ) | (2.7008 | ) | ||||||||||||||||
| Change in net asset value from operations | (3.4467 | ) | (6.0751 | ) | 3.0815 | (25.9896 | ) | (34.0298 | ) | (1.5404 | ) | (2.8148 | ) | ||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 62.4436 | $ | 30.2642 | $ | 91.6539 | $ | 88.1089 | $ | 76.5674 | $ | 36.386 | $ | 43.5964 | |||||||||||||||
| Market value per share, at June 30, 2013† | $ | 64.97 | $ | 36.45 | $ | 88 | $ | 106.5 | $ | 101.27 | $ | 38.01 | $ | 46.54 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 57.37 | $ | 30.25 | $ | 91.86 | $ | 87.88 | $ | 76.49 | $ | 36.41 | $ | 43.54 | |||||||||||||||
| Total Return, at net asset value^ | (5.2 | )% | (16.7 | )% | 3.5 | % | (22.8 | )% | (30.8 | )% | (4.1 | )% | (6.1 | )% | |||||||||||||||
| Total Return, at market value^ | (11.7 | )% | (17.0 | )% | 4.4 | % | (17.5 | )% | (24.5 | )% | (4.2 | )% | (6.4 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.97 | )% | (1.17 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.02 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.91 | )% | (0.94 | )% | (1.14 | )% | (0.91 | )% | (0.91 | )% | (0.95 | )% | (0.99 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort Euro | UltraShort Yen | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Commodity | Crude Oil | Natural Gas | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2013 | $ | 19.289 | $ | 64.1071 | $ | 19.2603 | $ | 30.1614 | $ | 36.0214 | $ | 41.6758 | $ | 15.7433 | |||||||||||||||
| Net investment income (loss) | (0.0429 | ) | (0.1464 | ) | (0.0469 | ) | (0.0851 | ) | (0.0937 | ) | (0.1173 | ) | (0.0458 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (1.5079 | ) | (1.7693 | ) | 0.7443 | 4.6335 | (3.6705 | ) | 9.1902 | 4.3722 | |||||||||||||||||||
| Change in net asset value from operations | (1.5508 | ) | (1.9157 | ) | 0.6974 | 4.5484 | (3.7642 | ) | 9.0729 | 4.3264 | |||||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 17.7382 | $ | 62.1914 | $ | 19.9577 | $ | 34.7098 | $ | 32.2572 | $ | 50.7487 | $ | 20.0697 | |||||||||||||||
| Market value per share, at June 30, 2013† | $ | 19.29 | $ | 64.08 | $ | 18.96 | $ | 30.11 | $ | 36.26 | $ | 44.63 | $ | 17 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 17.75 | $ | 62.23 | $ | 19.92 | $ | 34.73 | $ | 32.18 | $ | 50.86 | $ | 20.05 | |||||||||||||||
| Total Return, at net asset value^ | (8.0 | )% | (3.0 | )% | 3.6 | % | 15.1 | % | (10.4 | )% | 21.8 | % | 27.5 | % | |||||||||||||||
| Total Return, at market value^ | (8.0 | )% | (2.9 | )% | 5.1 | % | 15.3 | % | (11.3 | )% | 14 | % | 17.9 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.96 | )% | (1.11 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.92 | )% | (0.92 | )% | (0.91 | )% | (0.93 | )% | (1.08 | )% | (0.91 | )% | (0.91 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra Australian | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid-Term | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Dollar | Term Futures | Futures ETF | Short-Term | Short-Term | |||||||||||||||||||||||||
| ETF | Futures ETF | Futures ETF | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2013 | $ | 32.8323 | $ | 23.4744 | $ | 21.2199 | $ | 55.9419 | $ | 28.2875 | $ | 71.9959 | $ | 78.2628 | |||||||||||||||
| Net investment income (loss) | (0.0804 | ) | (0.0556 | ) | (0.0490 | ) | (0.0874 | ) | (0.0496 | ) | (0.1775 | ) | (0.3818 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | 1.5404 | 1.8323 | 0.3008 | (16.3058 | ) | (5.0606 | ) | (37.2930 | ) | 27.1345 | |||||||||||||||||||
| Change in net asset value from operations | 1.46 | 1.7767 | 0.2518 | (16.3932 | ) | (5.1102 | ) | (37.4705 | ) | 26.7527 | |||||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 34.2923 | $ | 25.2511 | $ | 21.4717 | $ | 39.5487 | $ | 23.1773 | $ | 34.5254 | $ | 105.0155 | |||||||||||||||
| Market value per share, at June 30, 2013† | $ | 33.96 | $ | 23.25 | $ | 21.1 | $ | 55.91 | $ | 28.25 | $ | 71.69 | $ | 78.45 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 34.35 | $ | 25.3 | $ | 21.7 | $ | 39.45 | $ | 23.02 | $ | 34.34 | $ | 105.14 | |||||||||||||||
| Total Return, at net asset value^ | 4.4 | % | 7.6 | % | 1.2 | % | (29.3 | )% | (18.1 | )% | (52.0 | )% | 34.2 | % | |||||||||||||||
| Total Return, at market value^ | 1.1 | % | 8.8 | % | 2.8 | % | (29.4 | )% | (18.5 | )% | (52.1 | )% | 34 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (1.00 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.81 | )% | (1.54 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.97 | )% | (0.91 | )% | (0.91 | )% | (0.83 | )% | (0.82 | )% | (1.79 | )% | (1.51 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the three months ended September 30, 2012: | |||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort DJ- | UltraShort DJ- | UltraShort DJ- | UltraShort | UltraShort | Short Euro | UltraShort | ||||||||||||||||||||||
| UBS | UBS Crude Oil | UBS Natural | Gold* | Silver | Australian | ||||||||||||||||||||||||
| Commodity | Gas* | Dollar+ | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2012 | $ | 59.0619 | $ | 49.2304 | $ | 121.2686 | $ | 70.9895 | $ | 69.925 | $ | 39.4721 | $ | 40 | |||||||||||||||
| Net investment income (loss) | (0.1137 | ) | (0.0935 | ) | (0.3363 | ) | (0.1462 | ) | (0.1252 | ) | (0.0901 | ) | (0.0764 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (10.9209 | ) | (8.5379 | ) | (32.3842 | ) | (14.5206 | ) | (29.9239 | ) | (0.6584 | ) | (1.2223 | ) | |||||||||||||||
| Change in net asset value from operations | (11.0346 | ) | (8.6314 | ) | (32.7205 | ) | (14.6668 | ) | (30.0491 | ) | (0.7485 | ) | (1.2987 | ) | |||||||||||||||
| Net asset value, at September 30, 2012 | $ | 48.0273 | $ | 40.599 | $ | 88.5481 | $ | 56.3227 | $ | 39.8759 | $ | 38.7236 | $ | 38.7013 | |||||||||||||||
| Market value per share, at June 30, 2012† | $ | 58.64 | $ | 49.42 | $ | 120.52 | $ | 70.92 | $ | 67.82 | $ | 39.49 | $ | 40 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 48.25 | $ | 40.72 | $ | 88.56 | $ | 56.48 | $ | 40.14 | $ | 38.64 | $ | 38.62 | |||||||||||||||
| Total Return, at net asset value^ | (18.7 | )% | (17.5 | )% | (27.0 | )% | (20.7 | )% | (43.0 | )% | (1.9 | )% | (3.2 | )% | |||||||||||||||
| Total Return, at market value^ | (17.7 | )% | (17.6 | )% | (26.5 | )% | (20.4 | )% | (40.8 | )% | (2.2 | )% | (3.5 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.98 | )% | (1.27 | )% | (0.95 | )% | (0.95 | )% | (0.96 | )% | (1.03 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.88 | )% | (0.91 | )% | (1.22 | )% | (0.88 | )% | (0.87 | )% | (0.90 | )% | (0.95 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| + | From commencement of investment operations, July 17, 2012 through September 30, 2012. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort Euro | UltraShort Yen | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Commodity | Crude Oil | Natural Gas | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2012 | $ | 20.9071 | $ | 43.5348 | $ | 23.5183 | $ | 27.713 | $ | 45.6921 | $ | 79.7618 | $ | 37.0313 | |||||||||||||||
| Net investment income (loss) | (0.0470 | ) | (0.0927 | ) | (0.0587 | ) | (0.0715 | ) | (0.1223 | ) | (0.1868 | ) | (0.0973 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (0.7332 | ) | (2.1433 | ) | 4.5424 | 3.67 | 5.5731 | 17.5971 | 21.864 | ||||||||||||||||||||
| Change in net asset value from operations | (0.7802 | ) | (2.2360 | ) | 4.4837 | 3.5985 | 5.4508 | 17.4103 | 21.7667 | ||||||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 20.1269 | $ | 41.2988 | $ | 28.002 | $ | 31.3115 | $ | 51.1429 | $ | 97.1721 | $ | 58.798 | |||||||||||||||
| Market value per share, at June 30, 2012† | $ | 20.9 | $ | 43.51 | $ | 23.66 | $ | 27.54 | $ | 45.75 | $ | 79.74 | $ | 38.13 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 20.12 | $ | 41.33 | $ | 27.71 | $ | 31.21 | $ | 51.09 | $ | 96.92 | $ | 58.35 | |||||||||||||||
| Total Return, at net asset value^ | (3.7 | )% | (5.1 | )% | 19.1 | % | 13 | % | 11.9 | % | 21.8 | % | 58.8 | % | |||||||||||||||
| Total Return, at market value^ | (3.7 | )% | (5.0 | )% | 17.1 | % | 13.3 | % | 11.7 | % | 21.5 | % | 53 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.14 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.88 | )% | (0.88 | )% | (0.88 | )% | (0.90 | )% | (1.08 | )% | (0.88 | )% | (0.88 | )% | |||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Three Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra Australian | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid-Term | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Dollar+ | Term Futures | Futures ETF | Short-Term | Short-Term | |||||||||||||||||||||||||
| ETF* | Futures ETF* | Futures ETF* | |||||||||||||||||||||||||||
| Net asset value, at June 30, 2012 | $ | 40 | $ | 22.6354 | $ | 33.492 | $ | 160.0441 | $ | 55.0359 | $ | 962.1056 | $ | 45.2817 | |||||||||||||||
| Net investment income (loss) | (0.0806 | ) | (0.0488 | ) | (0.0757 | ) | (0.2401 | ) | (0.0974 | ) | (2.1862 | ) | (0.2889 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | 0.9723 | 0.622 | 1.5795 | (64.7877 | ) | (13.4312 | ) | (656.0164 | ) | 23.0577 | |||||||||||||||||||
| Change in net asset value from operations | 0.8917 | 0.5732 | 1.5038 | (65.0278 | ) | (13.5286 | ) | (658.2026 | ) | 22.7688 | |||||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 40.8917 | $ | 23.2086 | $ | 34.9958 | $ | 95.0163 | $ | 41.5073 | $ | 303.903 | $ | 68.0505 | |||||||||||||||
| Market value per share, at June 30, 2012† | $ | 40 | $ | 22.62 | $ | 33.39 | $ | 161.6 | $ | 55.08 | $ | 984 | $ | 44.92 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 40.9 | $ | 23.18 | $ | 35.28 | $ | 96.1 | $ | 41.66 | $ | 309.2 | $ | 67.37 | |||||||||||||||
| Total Return, at net asset value^ | 2.2 | % | 2.5 | % | 4.5 | % | (40.6 | )% | (24.6 | )% | (68.4 | )% | 50.3 | % | |||||||||||||||
| Total Return, at market value^ | 2.3 | % | 2.5 | % | 5.7 | % | (40.5 | )% | (24.4 | )% | (68.6 | )% | 50 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (1.02 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.67 | )% | (2.16 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.94 | )% | (0.88 | )% | (0.87 | )% | (0.79 | )% | (0.80 | )% | (1.64 | )% | (2.08 | )% | |||||||||||||||
| + | From commencement of investment operations, July 17, 2012 through September 30, 2012. | ||||||||||||||||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the nine months ended September 30, 2013: | |||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | UltraShort DJ- | UltraShort | UltraShort | Short Euro | UltraShort | ||||||||||||||||||||||
| DJ-UBS | DJ-UBS | UBS Natural | Gold | Silver | Australian | ||||||||||||||||||||||||
| Commodity | Crude Oil | Gas* | Dollar | ||||||||||||||||||||||||||
| Net asset value, at December 31, 2012 | $ | 54.1021 | $ | 40.3079 | $ | 102.1402 | $ | 63.8688 | $ | 51.3951 | $ | 37.6285 | $ | 37.8081 | |||||||||||||||
| Net investment income (loss) | (0.3875 | ) | (0.2262 | ) | (0.6806 | ) | (0.5395 | ) | (0.4408 | ) | (0.2593 | ) | (0.3257 | ) | |||||||||||||||
| Net realized and unrealized gain (loss)# | 8.729 | (9.8175 | ) | (9.8057 | ) | 24.7796 | 25.6131 | (0.9832 | ) | 6.114 | |||||||||||||||||||
| Change in net asset value from operations | 8.3415 | (10.0437 | ) | (10.4863 | ) | 24.2401 | 25.1723 | (1.2425 | ) | 5.7883 | |||||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 62.4436 | $ | 30.2642 | $ | 91.6539 | $ | 88.1089 | $ | 76.5674 | $ | 36.386 | $ | 43.5964 | |||||||||||||||
| Market value per share, at December 31, 2012† | $ | 51.64 | $ | 40.44 | $ | 101.64 | $ | 62.6 | $ | 50.07 | $ | 37.64 | $ | 37.74 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 57.37 | $ | 30.25 | $ | 91.86 | $ | 87.88 | $ | 76.49 | $ | 36.41 | $ | 43.54 | |||||||||||||||
| Total Return, at net asset value^ | 15.4 | % | (24.9 | )% | (10.3 | )% | 38 | % | 49 | % | (3.3 | )% | 15.3 | % | |||||||||||||||
| Total Return, at market value^ | 11.1 | % | (25.2 | )% | (9.6 | )% | 40.4 | % | 52.8 | % | (3.3 | )% | 15.4 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.98 | )% | (1.20 | )% | (0.95 | )% | (0.95 | )% | (0.96 | )% | (1.03 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.89 | )% | (0.93 | )% | (1.15 | )% | (0.90 | )% | (0.89 | )% | (0.93 | )% | (0.99 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| # | The amount shown for a Share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Euro | Yen | Commodity | Crude Oil | Natural Gas | |||||||||||||||||||||||||
| Net asset value, at December 31, 2012 | $ | 19.0172 | $ | 50.7577 | $ | 24.3875 | $ | 29.3941 | $ | 39.049 | $ | 83.7634 | $ | 42.9727 | |||||||||||||||
| Net investment income (loss) | (0.1275 | ) | (0.4164 | ) | (0.1487 | ) | (0.2120 | ) | (0.3134 | ) | (0.4298 | ) | (0.1804 | ) | |||||||||||||||
| Net realized and unrealized gain (loss)# | (1.1515 | ) | 11.8501 | (4.2811 | ) | 5.5277 | (6.4784 | ) | (32.5849 | ) | (22.7226 | ) | |||||||||||||||||
| Change in net asset value from operations | (1.2790 | ) | 11.4337 | (4.4298 | ) | 5.3157 | (6.7918 | ) | (33.0147 | ) | (22.9030 | ) | |||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 17.7382 | $ | 62.1914 | $ | 19.9577 | $ | 34.7098 | $ | 32.2572 | $ | 50.7487 | $ | 20.0697 | |||||||||||||||
| Market value per share, at December 31, 2012† | $ | 19.01 | $ | 50.77 | $ | 23.93 | $ | 29.32 | $ | 39.24 | $ | 85.34 | $ | 44.1 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 17.75 | $ | 62.23 | $ | 19.92 | $ | 34.73 | $ | 32.18 | $ | 50.86 | $ | 20.05 | |||||||||||||||
| Total Return, at net asset value^ | (6.7 | )% | 22.5 | % | (18.2 | )% | 18.1 | % | (17.4 | )% | (39.4 | )% | (53.3 | )% | |||||||||||||||
| Total Return, at market value^ | (6.6 | )% | 22.6 | % | (16.8 | )% | 18.5 | % | (18.0 | )% | (40.4 | )% | (54.5 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.13 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.90 | )% | (0.90 | )% | (0.90 | )% | (0.91 | )% | (1.08 | )% | (0.88 | )% | (0.88 | )% | |||||||||||||||
| # | The amount shown for a Share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid- | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Australian | Term Futures | Term Futures | Short-Term | Short-Term | |||||||||||||||||||||||||
| Dollar | ETF* | ETF | Futures ETF* | Futures ETF | |||||||||||||||||||||||||
| Net asset value, at December 31, 2012 | $ | 41.4986 | $ | 24.3499 | $ | 28.184 | $ | 83.9374 | $ | 34.7003 | $ | 201.3178 | $ | 66.1298 | |||||||||||||||
| Net investment income (loss) | (0.2663 | ) | (0.1625 | ) | (0.1519 | ) | (0.3083 | ) | (0.1543 | ) | (0.7848 | ) | (1.0162 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (6.9400 | ) | 1.0637 | (6.5604 | ) | (44.0804 | ) | (11.3687 | ) | (166.0076 | ) | 39.9019 | |||||||||||||||||
| Change in net asset value from operations | (7.2063 | ) | 0.9012 | (6.7123 | ) | (44.3887 | ) | (11.5230 | ) | (166.7924 | ) | 38.8857 | |||||||||||||||||
| Net asset value, at September 30, 2013 | $ | 34.2923 | $ | 25.2511 | $ | 21.4717 | $ | 39.5487 | $ | 23.1773 | $ | 34.5254 | $ | 105.0155 | |||||||||||||||
| Market value per share, at December 31, 2012† | $ | 41.45 | $ | 24.32 | $ | 28.28 | $ | 85.05 | $ | 34.22 | $ | 209 | $ | 65.45 | |||||||||||||||
| Market value per share, at September 30, 2013† | $ | 34.35 | $ | 25.3 | $ | 21.7 | $ | 39.45 | $ | 23.02 | $ | 34.34 | $ | 105.14 | |||||||||||||||
| Total Return, at net asset value^ | (17.4 | )% | 3.7 | % | (23.8 | )% | (52.9 | )% | (33.2 | )% | (82.9 | )% | 58.8 | % | |||||||||||||||
| Total Return, at market value^ | (17.1 | )% | 4 | % | (23.3 | )% | (53.6 | )% | (32.7 | )% | (83.6 | )% | 60.6 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.99 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.84 | )% | (1.54 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.95 | )% | (0.90 | )% | (0.89 | )% | (0.81 | )% | (0.81 | )% | (1.82 | )% | (1.50 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2013. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| Selected data for a Share outstanding throughout the nine months ended September 30, 2012: | |||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | UltraShort | UltraShort | UltraShort | Short Euro+ | UltraShort | ||||||||||||||||||||||
| DJ-UBS | DJ-UBS | DJ-UBS | Gold* | Silver* | Australian | ||||||||||||||||||||||||
| Commodity | Crude Oil | Natural Gas* | Dollar++ | ||||||||||||||||||||||||||
| Net asset value, at December 31, 2011 | $ | 56.9207 | $ | 38.8151 | $ | 95.2206 | $ | 82.7114 | $ | 76.6771 | $ | 40 | $ | 40 | |||||||||||||||
| Net investment income (loss) | (0.3723 | ) | (0.2633 | ) | (1.4076 | ) | (0.4577 | ) | (0.3822 | ) | (0.0959 | ) | (0.0764 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | (8.5211 | ) | 2.0472 | (5.2649 | ) | (25.9310 | ) | (36.4190 | ) | (1.1805 | ) | (1.2223 | ) | ||||||||||||||||
| Change in net asset value from operations | (8.8934 | ) | 1.7839 | (6.6725 | ) | (26.3887 | ) | (36.8012 | ) | (1.2764 | ) | (1.2987 | ) | ||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 48.0273 | $ | 40.599 | $ | 88.5481 | $ | 56.3227 | $ | 39.8759 | $ | 38.7236 | $ | 38.7013 | |||||||||||||||
| Market value per share, at December 31, 2011† | $ | 56.19 | $ | 38.69 | $ | 95.84 | $ | 79.24 | $ | 79.35 | $ | 40 | $ | 40 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 48.25 | $ | 40.72 | $ | 88.56 | $ | 56.48 | $ | 40.14 | $ | 38.64 | $ | 38.62 | |||||||||||||||
| Total Return, at net asset value^ | (15.6 | )% | 4.6 | % | (7.0 | )% | (31.9 | )% | (48.0 | )% | (3.2 | )% | (3.2 | )% | |||||||||||||||
| Total Return, at market value^ | (14.1 | )% | 5.2 | % | (7.6 | )% | (28.7 | )% | (49.4 | )% | (3.4 | )% | (3.5 | )% | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.98 | )% | (1.43 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.03 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.90 | )% | (0.92 | )% | (1.39 | )% | (0.90 | )% | (0.90 | )% | (0.91 | )% | (0.95 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| + | From commencement of investment operations, June 26, 2012 through September 30, 2012. | ||||||||||||||||||||||||||||
| ++ | From commencement of investment operations, July 17, 2012, through September 30, 2012. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | UltraShort | UltraShort | Ultra DJ-UBS | Ultra DJ-UBS | Ultra DJ-UBS | Ultra Gold | Ultra Silver | ||||||||||||||||||||||
| Euro | Yen | Commodity | Crude Oil | Natural Gas* | |||||||||||||||||||||||||
| Net asset value, at December 31, 2011 | $ | 20.3357 | $ | 40.9557 | $ | 25.8805 | $ | 40.8828 | $ | 101.9786 | $ | 75.9066 | $ | 43.1903 | |||||||||||||||
| Net investment income (loss) | (0.1373 | ) | (0.2877 | ) | (0.1730 | ) | (0.2383 | ) | (0.3818 | ) | (0.5744 | ) | (0.3212 | ) | |||||||||||||||
| Net realized and unrealized gain (loss)# | (0.0715 | ) | 0.6308 | 2.2945 | 9.333 | (50.4539 | ) | 21.8399 | 15.9289 | ||||||||||||||||||||
| Change in net asset value from operations | (0.2088 | ) | 0.3431 | 2.1215 | (9.5713 | ) | (50.8357 | ) | 21.2655 | 15.6077 | |||||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 20.1269 | $ | 41.2988 | $ | 28.002 | $ | 31.3115 | $ | 51.1429 | $ | 97.1721 | $ | 58.798 | |||||||||||||||
| Market value per share, at December 31, 2011† | $ | 20.35 | $ | 40.95 | $ | 25.64 | $ | 40.94 | $ | 101.35 | $ | 79.01 | $ | 41.65 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 20.12 | $ | 41.33 | $ | 27.71 | $ | 31.21 | $ | 51.09 | $ | 96.92 | $ | 58.35 | |||||||||||||||
| Total Return, at net asset value^ | (1.0 | )% | 0.8 | % | 8.2 | % | (23.4 | )% | (49.8 | )% | 28 | % | 36.1 | % | |||||||||||||||
| Total Return, at market value^ | (1.1 | )% | 0.9 | % | 8.1 | % | (23.8 | )% | (49.6 | )% | 22.7 | % | 40.1 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.97 | )% | (1.22 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.90 | )% | (0.89 | )% | (0.90 | )% | (0.92 | )% | (1.16 | )% | (0.89 | )% | (0.90 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| # | The amount shown for a Share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2012 (unaudited) | |||||||||||||||||||||||||||||
| Per Share Operating Performance | Ultra | Ultra Euro | Ultra Yen | VIX Short- | VIX Mid- | Ultra VIX | Short VIX | ||||||||||||||||||||||
| Australian | Term Futures | Term Futures | Short-Term | Short-Term | |||||||||||||||||||||||||
| Dollar++ | ETF* | ETF | Futures ETF* | Futures ETF* | |||||||||||||||||||||||||
| Net asset value, at December 31, 2011 | $ | 40 | $ | 23.886 | $ | 36.4704 | $ | 381.869 | $ | 74.1396 | $ | 7,412.69 | $ | 25.8664 | |||||||||||||||
| Net investment income (loss) | (0.0806 | ) | (0.1590 | ) | (0.2275 | ) | (0.9662 | ) | (0.3463 | ) | (10.6829 | ) | (0.6056 | ) | |||||||||||||||
| Net realized and unrealized gain (loss) | 0.9723 | (0.5184 | ) | (1.2471 | ) | (285.8865 | ) | (32.2860 | ) | (7,098.1020 | ) | 42.7897 | |||||||||||||||||
| Change in net asset value from operations | 0.8917 | (0.6774 | ) | (1.4746 | ) | (286.8527 | ) | (32.6323 | ) | (7,108.7849 | ) | 42.1841 | |||||||||||||||||
| Net asset value, at September 30, 2012 | $ | 40.8917 | $ | 23.2086 | $ | 34.9958 | $ | 95.0163 | $ | 41.5073 | $ | 303.903 | $ | 68.0505 | |||||||||||||||
| Market value per share, at December 31, 2011† | $ | 40 | $ | 23.87 | $ | 36.5 | $ | 378.7 | $ | 74.13 | $ | 7,296.00 | $ | 26.14 | |||||||||||||||
| Market value per share, at September 30, 2012† | $ | 40.9 | $ | 23.18 | $ | 35.28 | $ | 96.1 | $ | 41.66 | $ | 309.2 | $ | 67.37 | |||||||||||||||
| Total Return, at net asset value^ | 2.2 | % | (2.8 | )% | (4.0 | )% | (75.1 | )% | (44.0 | )% | (95.9 | )% | 163.1 | % | |||||||||||||||
| Total Return, at market value^ | 2.3 | % | (2.9 | )% | (3.3 | )% | (74.6 | )% | (43.8 | )% | (95.8 | )% | 157.7 | % | |||||||||||||||
| Ratios to Average Net Assets** | |||||||||||||||||||||||||||||
| Expense ratio | (1.02 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (1.74 | )% | (1.88 | )% | |||||||||||||||
| Expense ratio, excluding brokerage commissions | (0.95 | )% | (0.95 | )% | (0.95 | )% | (0.85 | )% | (0.85 | )% | (0.95 | )% | (0.95 | )% | |||||||||||||||
| Net investment income (loss) | (0.94 | )% | (0.90 | )% | (0.89 | )% | (0.80 | )% | (0.81 | )% | (1.71 | )% | (1.82 | )% | |||||||||||||||
| * | See Note 1 of these Notes to Financial Statements. | ||||||||||||||||||||||||||||
| ++ | From commencement of operations, July 17, 2012, through September 30, 2012. | ||||||||||||||||||||||||||||
| † | Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. | ||||||||||||||||||||||||||||
| ^ | Percentages are not annualized for the period ended September 30, 2012. | ||||||||||||||||||||||||||||
| ** | Percentages are annualized. | ||||||||||||||||||||||||||||
Schedule_of_Investments_ShortT
| Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) (USD $) | Sep. 30, 2013 | |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | $3,196,967 | |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.051% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,420,000 | [1] |
| Value | 2,419,998 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.034% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 289,000 | [1] |
| Value | 288,992 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.047% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 139,000 | [1] |
| Value | 138,996 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.035% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 349,000 | |
| Value | 348,981 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 419,011,935 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.034% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 18,453,000 | |
| Value | 18,452,985 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 67,087,000 | |
| Value | 67,085,041 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 86,164,000 | |
| Value | 86,161,561 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.024% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 38,478,000 | [1] |
| Value | 38,477,654 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.046% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 12,524,000 | [1] |
| Value | 12,523,624 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.040% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 41,248,000 | [1] |
| Value | 41,246,643 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.034% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 17,504,000 | |
| Value | 17,503,582 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.029% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 124,865,000 | [1] |
| Value | 124,858,345 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.038% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 12,704,000 | [1] |
| Value | 12,702,500 | [1] |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 13,658,585 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.013% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 362,000 | |
| Value | 362,000 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.037% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 6,728,000 | |
| Value | 6,727,804 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.019% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,006,000 | |
| Value | 4,005,964 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.044% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 194,000 | |
| Value | 193,994 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.045% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 345,000 | |
| Value | 344,989 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.037% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 37,000 | |
| Value | 36,999 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.015% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,082,000 | |
| Value | 1,081,942 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.034% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 905,000 | |
| Value | 904,893 | |
| ProShares UltraShort Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 137,129,907 | |
| ProShares UltraShort Gold [Member] | US Treasury Bills 0.047% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,824,000 | [2] |
| Value | 4,823,855 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.019% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 20,905,000 | [2] |
| Value | 20,904,812 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.052% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 44,388,000 | [2] |
| Value | 44,387,965 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.032% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 28,810,000 | [2] |
| Value | 28,809,159 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.018% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 25,134,000 | [2] |
| Value | 25,132,660 | [2] |
| ProShares UltraShort Gold [Member] | Us Treasury Bills 0.013% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 13,073,000 | |
| Value | 13,071,456 | |
| ProShares UltraShort Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 106,048,955 | |
| ProShares UltraShort Silver [Member] | US Treasury Bills 0.047% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 7,370,000 | [2] |
| Value | 7,369,779 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.040% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 7,123,000 | [2] |
| Value | 7,122,766 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.043% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 6,755,000 | |
| Value | 6,754,994 | |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.033% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 45,457,000 | [2] |
| Value | 45,455,673 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 6,031,000 | [2] |
| Value | 6,030,856 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.026% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 29,233,000 | [2] |
| Value | 29,231,442 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.025% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,084,000 | [2] |
| Value | 4,083,445 | [2] |
| ProShares Short Euro [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 6,666,790 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.050% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 45,000 | |
| Value | 45,000 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.014% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,884,000 | |
| Value | 2,883,916 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.014% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,136,000 | |
| Value | 3,135,906 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.037% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 602,000 | |
| Value | 601,968 | |
| ProShares UltraShort Australian Dollar [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 22,016,137 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.040% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,583,000 | |
| Value | 2,582,915 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.037% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,980,000 | |
| Value | 1,979,953 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.030% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,343,000 | |
| Value | 1,342,999 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.036% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 620,000 | |
| Value | 619,982 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 10,660,000 | |
| Value | 10,659,680 | |
| ProShares UltraShort Australian Dollar [Member] | Us Treasury Bills 0.034% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,200,000 | |
| Value | 3,199,829 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.018% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,631,000 | |
| Value | 1,630,779 | |
| ProShares UltraShort Euro [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 482,820,998 | |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.019% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 232,904,000 | [3] |
| Value | 232,901,904 | [3] |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 9,649,000 | [3] |
| Value | 9,648,710 | [3] |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.049% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 22,750,000 | |
| Value | 22,749,982 | |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.041% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 207,300,000 | [3] |
| Value | 207,293,947 | [3] |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.021% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 10,227,000 | [3] |
| Value | 10,226,455 | [3] |
| ProShares UltraShort Yen [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 475,704,411 | |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.021% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 33,787,000 | [3] |
| Value | 33,785,199 | [3] |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.044% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 83,949,000 | |
| Value | 83,948,933 | |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.039% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 23,268,000 | [3] |
| Value | 23,267,320 | [3] |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.016% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 334,713,000 | [3] |
| Value | 334,702,959 | [3] |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 4,107,868 | |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.026% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,077,000 | |
| Value | 1,076,943 | |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.050% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 520,000 | [1] |
| Value | 520,000 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.014% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,115,000 | [1] |
| Value | 1,114,966 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.050% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,396,000 | [1] |
| Value | 1,395,959 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 136,394,297 | |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.045% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,725,000 | |
| Value | 1,724,943 | |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,164,000 | [1] |
| Value | 2,163,948 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.038% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 8,765,000 | [1] |
| Value | 8,764,993 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.019% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,253,000 | [1] |
| Value | 4,252,876 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.021% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 71,041,000 | [1] |
| Value | 71,038,990 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,257,000 | [1] |
| Value | 2,256,980 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.045% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,266,000 | [1] |
| Value | 1,265,962 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 44,928,000 | [1] |
| Value | 44,925,605 | [1] |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 75,238,008 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.034% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,632,000 | |
| Value | 3,631,913 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.026% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 19,439,000 | |
| Value | 19,437,964 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.018% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,839,000 | |
| Value | 4,838,343 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,984,000 | |
| Value | 1,983,982 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.045% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 6,718,000 | |
| Value | 6,717,798 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.039% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 5,406,000 | |
| Value | 5,405,996 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 28,257,000 | |
| Value | 28,256,175 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.036% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,966,000 | |
| Value | 4,965,837 | |
| ProShares Ultra Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 189,669,408 | |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.045% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 15,428,000 | |
| Value | 15,427,492 | |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.014% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,804,000 | [2] |
| Value | 2,803,916 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.023% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 59,813,000 | [2] |
| Value | 59,809,812 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.045% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 58,602,000 | [2] |
| Value | 58,601,953 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.048% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 39,951,000 | [2] |
| Value | 39,949,834 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.043% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 10,530,000 | [2] |
| Value | 10,529,702 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.042% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,547,000 | [2] |
| Value | 2,546,699 | [2] |
| ProShares Ultra Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 633,827,603 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,299,000 | |
| Value | 1,298,969 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,352,000 | [2] |
| Value | 3,351,970 | [2] |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.045% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 198,112,000 | |
| Value | 198,111,841 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.042% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,793,000 | |
| Value | 1,792,788 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.045% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 102,670,000 | |
| Value | 102,667,002 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.022% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 122,401,000 | [2] |
| Value | 122,397,536 | [2] |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.043% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 18,706,000 | [2] |
| Value | 18,705,385 | [2] |
| ProShares Ultra Silver [Member] | Us Treasury Bills 0.012% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 185,512,000 | [2] |
| Value | 185,502,112 | [2] |
| ProShares Ultra Australian Dollar [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 2,999,904 | |
| ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.018% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 257,000 | |
| Value | 256,986 | |
| ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,509,000 | |
| Value | 2,508,925 | |
| ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.032% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 234,000 | |
| Value | 233,993 | |
| ProShares Ultra Euro [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 2,290,933 | |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.029% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 994,000 | |
| Value | 993,947 | |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.050% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 848,000 | [3] |
| Value | 847,999 | [3] |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 114,000 | |
| Value | 113,997 | |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.039% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 335,000 | [3] |
| Value | 334,990 | [3] |
| ProShares Ultra Yen [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 3,118,885 | |
| ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,087,000 | [3] |
| Value | 2,086,937 | [3] |
| ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 117,000 | [3] |
| Value | 116,997 | [3] |
| ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.032% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 915,000 | |
| Value | 914,951 | |
| ProShares VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 130,224,349 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 14,330,000 | |
| Value | 14,329,236 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 57,588,000 | |
| Value | 57,587,954 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,058,000 | |
| Value | 2,057,942 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 184,000 | |
| Value | 183,995 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.029% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 10,100,000 | |
| Value | 10,099,909 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.041% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 26,175,000 | |
| Value | 26,174,215 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.032% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,142,000 | |
| Value | 1,141,962 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 5,178,000 | |
| Value | 5,177,876 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 8,413,000 | |
| Value | 8,411,858 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 5,060,000 | |
| Value | 5,059,402 | |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 77,780,701 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.044% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 14,079,000 | |
| Value | 14,078,578 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.034% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,738,000 | |
| Value | 3,737,559 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 5,457,000 | |
| Value | 5,456,870 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 166,000 | |
| Value | 165,977 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 20,632,000 | |
| Value | 20,631,983 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,243,000 | |
| Value | 1,242,989 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,233,000 | |
| Value | 2,232,937 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.040% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 13,992,000 | |
| Value | 13,991,591 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,087,000 | |
| Value | 4,086,865 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 12,156,000 | |
| Value | 12,155,352 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 197,516,820 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 20,354,000 | |
| Value | 20,351,596 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 24,506,000 | |
| Value | 24,502,672 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.041% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 6,849,000 | |
| Value | 6,848,800 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 274,000 | |
| Value | 273,997 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 14,776,000 | |
| Value | 14,775,557 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 12,780,000 | |
| Value | 12,779,695 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,745,000 | |
| Value | 3,744,997 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.028% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 21,125,000 | |
| Value | 21,124,402 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.037% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,300,000 | |
| Value | 3,299,891 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.014% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 89,820,000 | |
| Value | 89,815,213 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Value | 62,307,511 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 7,156,000 | |
| Value | 7,155,155 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.013% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 202,000 | |
| Value | 202,000 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 4,952,000 | |
| Value | 4,951,851 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.023% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 34,849,000 | |
| Value | 34,847,143 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 1,004,000 | |
| Value | 1,003,971 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.037% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 3,213,000 | |
| Value | 3,212,894 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | US Treasury Bills 0.022% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 8,776,000 | |
| Value | 8,775,790 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.022% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Principal amount | 2,159,000 | |
| Value | $2,158,707 | |
| [1] | All or partial amount pledged as collateral for swap agreements. | |
| [2] | All or partial amount pledged as collateral for forward agreements. | |
| [3] | All or partial amount pledged as collateral for foreign currency forward contracts. | |
Schedule_of_Investments_ShortT1
| Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) (USD $) | 9 Months Ended | |
| Sep. 30, 2013 | ||
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 85.00% | |
| Total short-term U.S. government and agency obligations, cost | $3,196,929 | |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.051% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [1] |
| Debt instrument, maturity date | 3-Oct-13 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.034% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [1] |
| Debt instrument, maturity date | 31-Oct-13 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.047% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [1] |
| Debt instrument, maturity date | 12-Dec-13 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | US Treasury Bills 0.035% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 95.00% | |
| Total short-term U.S. government and agency obligations, cost | 418,999,833 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.034% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 21-Nov-13 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.024% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [1] |
| Debt instrument, maturity date | 5-Dec-13 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.046% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [1] |
| Debt instrument, maturity date | 12-Dec-13 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.040% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [1] |
| Debt instrument, maturity date | 19-Dec-13 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.034% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.029% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [1] |
| Debt instrument, maturity date | 6-Feb-14 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.038% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [1] |
| Debt instrument, maturity date | 20-Mar-14 | [1] |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 85.00% | |
| Total short-term U.S. government and agency obligations, cost | 13,658,395 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.013% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.037% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.019% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 5-Dec-13 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.044% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.045% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.037% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.015% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.034% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares UltraShort Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 94.00% | |
| Total short-term U.S. government and agency obligations, cost | 137,129,482 | |
| ProShares UltraShort Gold [Member] | US Treasury Bills 0.047% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [2] |
| Debt instrument, maturity date | 12-Dec-13 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.019% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [2] |
| Debt instrument, maturity date | 5-Dec-13 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.052% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [2] |
| Debt instrument, maturity date | 3-Oct-13 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.032% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [2] |
| Debt instrument, maturity date | 31-Oct-13 | [2] |
| ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.018% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [2] |
| Debt instrument, maturity date | 6-Feb-14 | [2] |
| ProShares UltraShort Gold [Member] | Us Treasury Bills 0.013% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares UltraShort Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 92.00% | |
| Total short-term U.S. government and agency obligations, cost | 106,046,820 | |
| ProShares UltraShort Silver [Member] | US Treasury Bills 0.047% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [2] |
| Debt instrument, maturity date | 12-Dec-13 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.040% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [2] |
| Debt instrument, maturity date | 19-Dec-13 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.043% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.033% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [2] |
| Debt instrument, maturity date | 31-Oct-13 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [2] |
| Debt instrument, maturity date | 26-Dec-13 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.026% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [2] |
| Debt instrument, maturity date | 6-Feb-14 | [2] |
| ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.025% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [2] |
| Debt instrument, maturity date | 13-Mar-14 | [2] |
| ProShares Short Euro [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 92.00% | |
| Total short-term U.S. government and agency obligations, cost | 6,666,802 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.050% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.014% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.014% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares Short Euro [Member] | U.S. Treasury Bills 0.037% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares UltraShort Australian Dollar [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 92.00% | |
| Total short-term U.S. government and agency obligations, cost | 22,015,646 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.040% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.037% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.030% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.036% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares UltraShort Australian Dollar [Member] | Us Treasury Bills 0.034% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.018% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 13-Mar-14 | |
| ProShares UltraShort Euro [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 106.00% | |
| Total short-term U.S. government and agency obligations, cost | 482,813,582 | |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.019% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [3] |
| Debt instrument, maturity date | 5-Dec-13 | [3] |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [3] |
| Debt instrument, maturity date | 12-Dec-13 | [3] |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.049% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.041% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [3] |
| Debt instrument, maturity date | 31-Oct-13 | [3] |
| ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.021% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [3] |
| Debt instrument, maturity date | 6-Feb-14 | [3] |
| ProShares UltraShort Yen [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 103.00% | |
| Total short-term U.S. government and agency obligations, cost | 475,703,032 | |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.021% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [3] |
| Debt instrument, maturity date | 6-Feb-14 | [3] |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.044% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.039% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [3] |
| Debt instrument, maturity date | 31-Oct-13 | [3] |
| ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.016% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [3] |
| Debt instrument, maturity date | 12-Dec-13 | [3] |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 103.00% | |
| Total short-term U.S. government and agency obligations, cost | 4,107,812 | |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.026% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 6-Feb-13 | |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.050% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [1] |
| Debt instrument, maturity date | 3-Oct-13 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.014% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | [1] |
| Debt instrument, maturity date | 12-Dec-13 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.050% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [1] |
| Debt instrument, maturity date | 31-Oct-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 100.00% | |
| Total short-term U.S. government and agency obligations, cost | 136,392,465 | |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.045% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [1] |
| Debt instrument, maturity date | 26-Dec-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.038% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [1] |
| Debt instrument, maturity date | 3-Oct-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.019% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [1] |
| Debt instrument, maturity date | 31-Oct-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.021% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [1] |
| Debt instrument, maturity date | 21-Nov-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [1] |
| Debt instrument, maturity date | 5-Dec-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.045% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [1] |
| Debt instrument, maturity date | 12-Dec-13 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [1] |
| Debt instrument, maturity date | 6-Feb-14 | [1] |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 80.00% | |
| Total short-term U.S. government and agency obligations, cost | 75,236,739 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.034% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.026% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.018% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 13-Mar-14 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 5-Dec-13 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.045% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.039% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.036% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares Ultra Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 110.00% | |
| Total short-term U.S. government and agency obligations, cost | 189,665,568 | |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.045% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.014% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | [2] |
| Debt instrument, maturity date | 12-Dec-13 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.023% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [2] |
| Debt instrument, maturity date | 6-Feb-14 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.045% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [2] |
| Debt instrument, maturity date | 3-Oct-13 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.048% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [2] |
| Debt instrument, maturity date | 31-Oct-13 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.043% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [2] |
| Debt instrument, maturity date | 21-Nov-13 | [2] |
| ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.042% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [2] |
| Debt instrument, maturity date | 20-Mar-14 | [2] |
| ProShares Ultra Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 114.00% | |
| Total short-term U.S. government and agency obligations, cost | 633,826,597 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [2] |
| Debt instrument, maturity date | 5-Dec-13 | [2] |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.045% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.042% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.045% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.022% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [2] |
| Debt instrument, maturity date | 21-Nov-13 | [2] |
| ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.043% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [2] |
| Debt instrument, maturity date | 19-Dec-13 | [2] |
| ProShares Ultra Silver [Member] | Us Treasury Bills 0.012% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | [2] |
| Debt instrument, maturity date | 6-Feb-14 | [2] |
| ProShares Ultra Australian Dollar [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 87.00% | |
| Total short-term U.S. government and agency obligations, cost | 2,999,882 | |
| ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.018% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.032% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Ultra Euro [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 91.00% | |
| Total short-term U.S. government and agency obligations, cost | 2,290,867 | |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.029% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.050% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | [3] |
| Debt instrument, maturity date | 3-Oct-13 | [3] |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.039% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | [3] |
| Debt instrument, maturity date | 12-Dec-13 | [3] |
| ProShares Ultra Yen [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 97.00% | |
| Total short-term U.S. government and agency obligations, cost | 3,118,815 | |
| ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | [3] |
| Debt instrument, maturity date | 12-Dec-13 | [3] |
| ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.030% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | [3] |
| Debt instrument, maturity date | 31-Oct-13 | [3] |
| ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.032% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 78.00% | |
| Total short-term U.S. government and agency obligations, cost | 130,222,456 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 21-Nov-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.029% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 5-Dec-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.041% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.032% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 13-Mar-14 | |
| ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 80.00% | |
| Total short-term U.S. government and agency obligations, cost | 77,779,005 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.044% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.034% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.033% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 13-Mar-14 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 5-Dec-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 21-Nov-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.040% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 69.00% | |
| Total short-term U.S. government and agency obligations, cost | 197,515,581 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 13-Mar-14 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.041% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 12/05/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 5-Dec-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.05% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.028% Due 11/21/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.03% | |
| Debt instrument, maturity date | 21-Nov-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.037% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.014% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Short-term U.S. government and agency obligations percentage of shareholders' equity | 66.00% | |
| Total short-term U.S. government and agency obligations, cost | $62,305,766 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.038% Due 03/20/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 20-Mar-14 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.013% Due 10/03/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.01% | |
| Debt instrument, maturity date | 3-Oct-13 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 12/12/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 12-Dec-13 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.023% Due 02/06/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 6-Feb-14 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 10/31/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 31-Oct-13 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.037% Due 12/19/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.04% | |
| Debt instrument, maturity date | 19-Dec-13 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | US Treasury Bills 0.022% Due 12/26/13 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 26-Dec-13 | |
| ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.022% Due 03/13/14 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Interest rate | 0.02% | |
| Debt instrument, maturity date | 13-Mar-14 | |
| [1] | All or partial amount pledged as collateral for swap agreements. | |
| [2] | All or partial amount pledged as collateral for forward agreements. | |
| [3] | All or partial amount pledged as collateral for foreign currency forward contracts. | |
Schedule_of_Investments_Swap_A
| Schedule of Investments - Swap Agreements (Detail) (USD $) | Sep. 30, 2013 | |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | $200,128 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreement with Deutsche Bank AG Based on Dow Jones-UBS Commodity Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -2,645,772 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 71,108 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreement with Goldman Sachs International Based on Dow Jones-UBS Commodity Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -3,749,305 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 100,420 | [1] |
| ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreement with UBS AG Based on Dow Jones-UBS Commodity Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -1,095,198 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 28,600 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 34,688,207 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreement with Deutsche Bank AG Based on Dow Jones UBS WTI Crude Oil Sub Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -138,285,284 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 10,374,607 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreement with Goldman Sachs International Based on Dow Jones UBS WTI Crude Oil Sub Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -141,900,040 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 8,780,104 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap agreement with Societe Generale S.A. based on Dow Jones-UBS Crude Oil Sub-Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -85,110,010 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 5,485,866 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreement with UBS AG Based on Dow Jones UBS WTI Crude Oil Sub-Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | -132,930,537 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 10,047,630 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -237,372 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreement with Deutsche Bank AG Based on Dow Jones-UBS Commodity Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 2,467,834 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -73,556 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreement with Goldman Sachs International Based on Dow Jones-UBS Commodity Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 3,803,041 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -113,209 | [1] |
| ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreement with UBS AG Based on Dow Jones-UBS Commodity Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 1,697,422 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -50,607 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -10,995,019 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreement with Deutsche Bank AG Based on Dow Jones UBS WTI Crude Oil Sub Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 46,973,928 | [1],[3] |
| Unrealized Appreciation (Depreciation) | -2,428,302 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreement with Goldman Sachs International Based on Dow Jones UBS WTI Crude Oil Sub Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 45,742,000 | [1],[3] |
| Unrealized Appreciation (Depreciation) | -3,504,152 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreement with UBS AG Based on Dow Jones UBS WTI Crude Oil Sub-Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 44,514,417 | [1],[3] |
| Unrealized Appreciation (Depreciation) | -3,151,637 | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreement with Societe Generale S.A. Based on Dow Jones UBS WTI Crude Oil Sub Index [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Termination Date | 7-Oct-13 | [1] |
| Notional Amount at Value | 25,106,915 | [1],[3] |
| Unrealized Appreciation (Depreciation) | ($1,910,928) | [1] |
| [1] | The positions and counterparties herein are as of September 30, 2013. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time. | |
| [2] | For swap agreements, a positive amount represents "long" exposure to the benchmark index. A negative amount represents "short" exposure to the benchmark index. | |
| [3] | For swap agreements, a positive amount represents "long" exposure to the benchmark index. A negative amount represents "short" exposure to the benchmark index | |
Schedule_of_Investments_Future
| Schedule of Investments - Futures Contracts Sold (Detail) (USD $) | 9 Months Ended | |
| Sep. 30, 2013 | ||
| Contract | ||
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | $34,688,207 | [1] |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Crude Oil - NYMEX, expires November 2013[Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 3,779 | [2] |
| Notional Amount at Value | 386,705,070 | [2] |
| Unrealized Appreciation (Depreciation) | 8,716,596 | [2] |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | Natural Gas - NYMEX, expires November 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 901 | [3] |
| Notional Amount at Value | 32,075,600 | [3] |
| Unrealized Appreciation (Depreciation) | 467,284 | [3] |
| ProShares UltraShort Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 7,782,450 | [1] |
| ProShares UltraShort Gold [Member] | Gold Futures - COMEX, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 2 | [4] |
| Notional Amount at Value | 265,400 | [4] |
| Unrealized Appreciation (Depreciation) | -9,400 | [4] |
| ProShares UltraShort Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 9,083,114 | [1] |
| ProShares UltraShort Silver [Member] | Silver Futures - COMEX, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 2 | [5] |
| Notional Amount at Value | 217,080 | [5] |
| Unrealized Appreciation (Depreciation) | -2,180 | [5] |
| ProShares Short Euro [Member] | Euro Fx Currency Futures - CME, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 43 | [6] |
| Notional Amount at Value | 7,270,763 | [6] |
| Unrealized Appreciation (Depreciation) | -141,094 | [6] |
| ProShares UltraShort Australian Dollar [Member] | Australian Dollar Fx Currency Futures - CME, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 519 | [7] |
| Notional Amount at Value | 48,158,010 | [7] |
| Unrealized Appreciation (Depreciation) | -466,612 | [7] |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | ' | [8] |
| Notional Amount at Value | ' | [8] |
| Unrealized Appreciation (Depreciation) | -3,449,929 | [8] |
| ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires October 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 3,153 | [8] |
| Notional Amount at Value | 51,078,600 | [8] |
| Unrealized Appreciation (Depreciation) | -1,909,079 | [8] |
| ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires November 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 2,585 | [8] |
| Notional Amount at Value | 43,686,500 | [8] |
| Unrealized Appreciation (Depreciation) | ($1,540,850) | [8] |
| [1] | The positions and counterparties herein are as of September 30, 2013. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time. | |
| [2] | Cash collateral in the amount of $17,043,290 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [3] | Cash collateral in the amount of $2,081,310 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [4] | Cash collateral in the amount of $17,600 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [5] | Cash collateral in the amount of $24,750 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [6] | Cash collateral in the amount of $118,250 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [7] | Cash collateral in the amount of $1,044,747 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [8] | Cash collateral in the amount of $16,724,300 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
Schedule_of_Investments_Future1
| Schedule of Investments - Futures Contracts Sold (Parenthetical) (Detail) (USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | $17,043,290 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 2,081,310 |
| ProShares UltraShort Gold [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 17,600 |
| ProShares UltraShort Silver [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 24,750 |
| ProShares Short Euro [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 118,250 |
| ProShares UltraShort Australian Dollar [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 1,044,747 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | $16,724,300 |
Schedule_of_Investments_Forwar
| Schedule of Investments - Forward Agreements (Detail) (USD $) | Sep. 30, 2013 | |
| ProShares UltraShort Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | $7,782,450 | [1] |
| ProShares UltraShort Gold [Member] | Forward Agreements with Deutsche Bank AG Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -121,700 | [1] |
| Notional Amount at Value | -161,438,701 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 4,474,464 | [1] |
| ProShares UltraShort Gold [Member] | Forward Agreements with Goldman Sachs International Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -58,998 | [1] |
| Notional Amount at Value | -78,262,617 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 1,765,604 | [1] |
| ProShares UltraShort Gold [Member] | Forward Agreements with Societe Generale S.A. Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -30,000 | [1] |
| Notional Amount at Value | -39,795,900 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 935,071 | [1] |
| ProShares UltraShort Gold [Member] | Forward Agreements with UBS AG Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -7,850 | [1] |
| Notional Amount at Value | -10,413,261 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 607,311 | [1] |
| ProShares UltraShort Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 9,083,114 | [1] |
| ProShares UltraShort Silver [Member] | Forward Agreements with Deutsche Bank AG based On 0.999 Fine Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -5,467,000 | [1] |
| Notional Amount at Value | -118,539,868 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 5,461,114 | [1] |
| ProShares UltraShort Silver [Member] | Forward Agreements with Goldman Sachs International based On 0.999 Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -3,016,500 | [1] |
| Notional Amount at Value | -65,406,166 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 1,249,680 | [1] |
| ProShares UltraShort Silver [Member] | Forward Agreements with Societe Generale S.A. based on 0.999 Fine Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -1,749,000 | [1] |
| Notional Amount at Value | -37,923,217 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 1,810,591 | [1] |
| ProShares UltraShort Silver [Member] | Forward Agreements with UBS AG based on 0.999 Fine Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | -411,000 | [1] |
| Notional Amount at Value | -8,911,631 | [1],[2] |
| Unrealized Appreciation (Depreciation) | 561,729 | [1] |
| ProShares Ultra Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -17,189,960 | [1] |
| ProShares Ultra Gold [Member] | Forward Agreements with Deutsche Bank AG Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 142,200 | [1] |
| Notional Amount at Value | 188,632,566 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -9,410,748 | [1] |
| ProShares Ultra Gold [Member] | Forward Agreements with Goldman Sachs International Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 66,620 | [1] |
| Notional Amount at Value | 88,373,429 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -4,079,114 | [1] |
| ProShares Ultra Gold [Member] | Forward Agreements with Societe Generale S.A. Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 34,900 | [1] |
| Notional Amount at Value | 46,295,897 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -2,180,790 | [1] |
| ProShares Ultra Gold [Member] | Forward Agreements with UBS AG Based on 0.995 Fine Troy Ounce Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 16,200 | [1] |
| Notional Amount at Value | 21,489,786 | [1],[2] |
| Unrealized Appreciation (Depreciation) | -1,519,308 | [1] |
| ProShares Ultra Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -80,087,349 | [1] |
| ProShares Ultra Silver [Member] | Forward Agreements with Deutsche Bank AG based On 0.999 Fine Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 27,698,000 | [1] |
| Notional Amount at Value | 600,570,194 | [1],[3] |
| Unrealized Appreciation (Depreciation) | -40,058,378 | [1] |
| ProShares Ultra Silver [Member] | Forward Agreements with Goldman Sachs International based On 0.999 Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 12,282,800 | [1] |
| Notional Amount at Value | 266,325,496 | [1],[3] |
| Unrealized Appreciation (Depreciation) | -24,037,958 | [1] |
| ProShares Ultra Silver [Member] | Forward Agreements with Societe Generale S.A. based on 0.999 Fine Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 8,168,000 | [1] |
| Notional Amount at Value | 177,105,110 | [1],[3] |
| Unrealized Appreciation (Depreciation) | -11,898,455 | [1] |
| ProShares Ultra Silver [Member] | Forward Agreements with UBS AG based on 0.999 Fine Troy Ounce Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 7-Oct-13 | [1] |
| Commitment to (Deliver)/Receive | 2,935,000 | [1] |
| Notional Amount at Value | 63,639,018 | [1],[3] |
| Unrealized Appreciation (Depreciation) | ($4,092,558) | [1] |
| [1] | The positions and counterparties herein are as of September 30, 2013. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time. | |
| [2] | For forward agreements, a positive amount represents "long" exposure to the underlying commodity. A negative amount represents "short" exposure to the underlying commodity. | |
| [3] | For forward agreements, a positive amount represents "long" exposure to the underlying commodity. A negative amount represents "short" exposure to the underlying commodity | |
Schedule_of_Investments_Foreig
| Schedule of Investments - Foreign Currency Forward Contracts (Detail) (USD $) | Sep. 30, 2013 | |
| ProShares UltraShort Euro [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | $1,643,765 | [1] |
| ProShares UltraShort Euro [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -27,575,831 | [1] |
| ProShares UltraShort Euro [Member] | Euro with Goldman Sachs International [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 59,619,300 | [1] |
| Notional Amount at Value | 80,653,379 | [1] |
| Unrealized Appreciation (Depreciation) | 1,060,483 | [1] |
| ProShares UltraShort Euro [Member] | Euro with Goldman Sachs International [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -395,033,825 | [1] |
| Notional Amount at Value | -534,404,339 | [1] |
| Unrealized Appreciation (Depreciation) | -13,695,213 | [1] |
| ProShares UltraShort Euro [Member] | Euro with UBS AG [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 44,376,200 | [1] |
| Notional Amount at Value | 60,032,413 | [1] |
| Unrealized Appreciation (Depreciation) | 583,282 | [1] |
| ProShares UltraShort Euro [Member] | Euro with UBS AG [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -385,179,200 | [1] |
| Notional Amount at Value | -521,072,938 | [1] |
| Unrealized Appreciation (Depreciation) | -13,880,618 | [1] |
| ProShares UltraShort Yen [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 793,507 | [1] |
| ProShares UltraShort Yen [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -13,313,050 | [1] |
| ProShares UltraShort Yen [Member] | Yen with Goldman Sachs International [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 10,842,832,400 | [1] |
| Notional Amount at Value | 110,305,446 | [1] |
| Unrealized Appreciation (Depreciation) | 718,095 | [1] |
| ProShares UltraShort Yen [Member] | Yen with Goldman Sachs International [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -56,007,835,200 | [1] |
| Notional Amount at Value | -569,774,484 | [1] |
| Unrealized Appreciation (Depreciation) | -7,048,993 | [1] |
| ProShares UltraShort Yen [Member] | Yen with UBS AG [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 4,202,410,900 | [1] |
| Notional Amount at Value | 42,751,635 | [1] |
| Unrealized Appreciation (Depreciation) | 75,412 | [1] |
| ProShares UltraShort Yen [Member] | Yen with UBS AG [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -50,043,376,200 | [1] |
| Notional Amount at Value | -509,097,321 | [1] |
| Unrealized Appreciation (Depreciation) | -6,264,057 | [1] |
| ProShares Ultra Euro [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 198,744 | [1] |
| ProShares Ultra Euro [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -8,271 | [1] |
| ProShares Ultra Euro [Member] | Euro with Goldman Sachs International [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 1,573,025 | [1] |
| Notional Amount at Value | 2,127,999 | [1] |
| Unrealized Appreciation (Depreciation) | 55,456 | [1] |
| ProShares Ultra Euro [Member] | Euro with Goldman Sachs International [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -1,867,300 | [1] |
| Notional Amount at Value | -2,526,096 | [1] |
| Unrealized Appreciation (Depreciation) | -6,697 | [1] |
| ProShares Ultra Euro [Member] | Euro with UBS AG [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 4,058,700 | [1] |
| Notional Amount at Value | 5,490,636 | [1] |
| Unrealized Appreciation (Depreciation) | 143,288 | [1] |
| ProShares Ultra Euro [Member] | Euro with UBS AG [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -38,400 | [1] |
| Notional Amount at Value | -51,948 | [1] |
| Unrealized Appreciation (Depreciation) | -1,574 | [1] |
| ProShares Ultra Yen [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 78,715 | [1] |
| ProShares Ultra Yen [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -3,220 | [1] |
| ProShares Ultra Yen [Member] | Yen with Goldman Sachs International [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 317,266,000 | [1] |
| Notional Amount at Value | 3,227,585 | [1] |
| Unrealized Appreciation (Depreciation) | 37,892 | [1] |
| ProShares Ultra Yen [Member] | Yen with Goldman Sachs International [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -18,973,500 | [1] |
| Notional Amount at Value | -193,020 | [1] |
| Unrealized Appreciation (Depreciation) | -2,496 | [1] |
| ProShares Ultra Yen [Member] | Yen with UBS AG [Member] | Contracts To Purchase [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | 339,056,000 | [1] |
| Notional Amount at Value | 3,449,258 | [1] |
| Unrealized Appreciation (Depreciation) | 40,823 | [1] |
| ProShares Ultra Yen [Member] | Yen with UBS AG [Member] | Contracts To Sell [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Settlement Date | 4-Oct-13 | [1] |
| Local Currency | -3,870,100 | [1] |
| Notional Amount at Value | -39,371 | [1] |
| Unrealized Appreciation (Depreciation) | ($724) | [1] |
| [1] | The positions and counterparties herein are as of September 30, 2013. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time. | |
Schedule_of_Investments_Future2
| Schedule of Investments - Future Contracts Purchased (Detail) (USD $) | 9 Months Ended | |
| Sep. 30, 2013 | ||
| Contract | ||
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | ($10,995,019) | [1] |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Crude Oil - NYMEX, expires November 2013[Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 1,093 | [2] |
| Notional Amount at Value | 111,846,690 | [2] |
| Unrealized Appreciation (Depreciation) | -2,710,766 | [2] |
| ProShares Ultra DJ-UBS Natural Gas [Member] | Natural Gas - NYMEX, expires November 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 5,291 | [3] |
| Notional Amount at Value | 188,359,600 | [3] |
| Unrealized Appreciation (Depreciation) | 3,434,395 | [3] |
| ProShares Ultra Gold [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -17,189,960 | [1] |
| ProShares Ultra Gold [Member] | Gold Futures - COMEX, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 2 | [4] |
| Notional Amount at Value | 265,400 | [4] |
| Unrealized Appreciation (Depreciation) | 9,420 | [4] |
| ProShares Ultra Silver [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -80,087,349 | [1] |
| ProShares Ultra Silver [Member] | Silver Futures - COMEX, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 2 | [5] |
| Notional Amount at Value | 217,080 | [5] |
| Unrealized Appreciation (Depreciation) | 2,180 | [5] |
| ProShares Ultra Australian Dollar [Member] | Australian Dollar Fx Currency Futures - CME, expires December 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 74 | [6] |
| Notional Amount at Value | 6,866,460 | [6] |
| Unrealized Appreciation (Depreciation) | 70,124 | [6] |
| ProShares VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 3,220,206 | [7] |
| ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires October 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 5,549 | [7] |
| Notional Amount at Value | 89,893,800 | [7] |
| Unrealized Appreciation (Depreciation) | -96,120 | [7] |
| ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires November 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 4,540 | [7] |
| Notional Amount at Value | 76,726,000 | [7] |
| Unrealized Appreciation (Depreciation) | 3,316,326 | [7] |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | -730,620 | [8] |
| ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2014 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 943 | [8] |
| Notional Amount at Value | 17,021,150 | [8] |
| Unrealized Appreciation (Depreciation) | -125,230 | [8] |
| ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2014 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 1,715 | [8] |
| Notional Amount at Value | 31,984,750 | [8] |
| Unrealized Appreciation (Depreciation) | -290,520 | [8] |
| ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires March 2014 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 1,716 | [8] |
| Notional Amount at Value | 32,775,600 | [8] |
| Unrealized Appreciation (Depreciation) | -586,860 | [8] |
| ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires April 2014 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 772 | [8] |
| Notional Amount at Value | 14,976,800 | [8] |
| Unrealized Appreciation (Depreciation) | 271,990 | [8] |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Unrealized Appreciation (Depreciation) | 12,992,694 | [9] |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires October 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 19,039 | [9] |
| Notional Amount at Value | 308,431,800 | [9] |
| Unrealized Appreciation (Depreciation) | 1,573,538 | [9] |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires November 2013 [Member] | ' | |
| Schedule of Investments [Line Items] | ' | |
| Number of Contracts | 15,586 | [9] |
| Notional Amount at Value | 263,403,400 | [9] |
| Unrealized Appreciation (Depreciation) | $11,419,156 | [9] |
| [1] | The positions and counterparties herein are as of September 30, 2013. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time. | |
| [2] | Cash collateral in the amount of $4,929,430 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [3] | Cash collateral in the amount of $12,222,210 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [4] | Cash collateral in the amount of $17,600 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [5] | Cash collateral in the amount of $24,750 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [6] | Cash collateral in the amount of $148,962 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [7] | Cash collateral in the amount of $29,359,000 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [8] | Cash collateral in the amount of $14,112,900 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
| [9] | Cash collateral in the amount of $100,757,800 was pledged to cover margin requirements for open futures contracts as of September 30, 2013. | |
Schedule_of_Investments_Future3
| Schedule of Investments - Future Contracts Purchased (Parenthetical) (Detail) (USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | $4,929,430 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 12,222,210 |
| ProShares Ultra Gold [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 17,600 |
| ProShares Ultra Silver [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 24,750 |
| ProShares Ultra Australian Dollar [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 148,962 |
| ProShares VIX Short-Term Futures ETF [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 29,359,000 |
| ProShares VIX Mid-Term Futures ETF [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | 14,112,900 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' |
| Schedule of Investments [Line Items] | ' |
| Cash Collateral Pledged To Cover Margin Requirements | $100,757,800 |
Organization_Additional_Inform
| Organization - Additional Information (Detail) (USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| D | |
| Trust | |
| Organization [Line Items] | ' |
| Number of series of Trust | 21 |
| Number of shares of each Leveraged Fund | 14 |
| Aggregate purchase price of each Leveraged Fund | $350 |
| Number of days for expected multiple returns | 1 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares UltraShort Gold [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares UltraShort Silver [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares UltraShort Euro [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares UltraShort Yen [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares Ultra Gold [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares Ultra Silver [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares Ultra Euro [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | 350 |
| ProShares Ultra Yen [Member] | ' |
| Organization [Line Items] | ' |
| Aggregate purchase price of each Leveraged Fund | $350 |
Organization_Schedule_of_Share
| Organization - Schedule of Share Splits and Reverse Share Splits (Detail) | 1 Months Ended | |||||||||
| Jun. 10, 2013 | 11-May-12 | Oct. 05, 2012 | 11-May-12 | 11-May-12 | Jun. 10, 2013 | Jun. 10, 2013 | Sep. 07, 2012 | Mar. 08, 2012 | Oct. 05, 2012 | |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Silver [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | |
| Organization [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
| Execution Date (Prior to Opening of Trading) | 'June 10, 2013 | 'May 11, 2012 | 'October 5, 2012 | 'May 11, 2012 | 'May 11, 2012 | 'June 10, 2013 | 'June 10, 2013 | 'September 7, 2012 | 'March 8, 2012 | 'October 5, 2012 |
| Date Trading Resumed at Post- Split Price | 'June 10, 2013 | 'May 11, 2012 | 'October 5, 2012 | 'May 11, 2012 | 'May 11, 2012 | 'June 10, 2013 | 'June 10, 2013 | 'September 7, 2012 | 'March 8, 2012 | 'October 5, 2012 |
| Funds Reverse Split | '1-for-4 reverse Share split | ' | '1-for-4 reverse Share split | '1-for-5 reverse Share split | '1-for-5 reverse Share split | '1-for-5 reverse Share split | '1-for-10 reverse Share split | '1-for-10 reverse Share split | '1-for-6 reverse Share split | ' |
| Funds Split | ' | '3-for-1 Share split | ' | ' | ' | ' | ' | ' | ' | '2-for-1 Share split |
Significant_Accounting_Policie3
| Significant Accounting Policies - Calculation of Funds' Final Net Asset Value for Creation and Redemption of Fund Shares (Detail) | Sep. 30, 2013 |
| ProShares UltraShort Silver [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '7:00 A.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra Silver [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '7:00 A.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort Gold [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '10:00 A.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra Gold [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '10:00 A.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '2:30 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '2:30 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '2:30 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '2:30 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '3:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '3:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort Australian Dollar [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra Australian Dollar [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Short Euro [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort Euro [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra Euro [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares UltraShort Yen [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra Yen [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:00 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares VIX Short-Term Futures ETF [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:15 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:15 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:15 P.M. |
| NAV Calculation Date | 'September 30 |
| ProShares VIX Mid-Term Futures ETF [Member] | ' |
| Significant Accounting Policies [Line Items] | ' |
| NAV Calculation Time | '4:15 P.M. |
| NAV Calculation Date | 'September 30 |
Significant_Accounting_Policie4
| Significant Accounting Policies - Valuation of Investments (Detail) (USD $) | 9 Months Ended | 12 Months Ended |
| Sep. 30, 2013 | Dec. 31, 2012 | |
| Significant Accounting Policies [Line Items] | ' | ' |
| Level III portfolio investments | $0 | $0 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,397,095 | 2,952,406 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 462,416,738 | 77,409,608 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 14,125,869 | 10,451,866 |
| ProShares UltraShort Gold [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 144,902,957 | 92,320,494 |
| ProShares UltraShort Silver [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 115,129,889 | 105,554,406 |
| ProShares Short Euro [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 6,525,696 | 3,354,848 |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 21,549,525 | 3,388,497 |
| ProShares UltraShort Euro [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 456,888,932 | 540,282,990 |
| ProShares UltraShort Yen [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 463,184,868 | 400,857,406 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,870,496 | 5,934,683 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 122,688,512 | 492,956,680 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 78,672,403 | 60,496,274 |
| ProShares Ultra Gold [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 172,488,868 | 334,957,606 |
| ProShares Ultra Silver [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 553,742,434 | 745,276,660 |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,070,028 | 3,471,864 |
| ProShares Ultra Euro [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 2,481,406 | 4,634,103 |
| ProShares Ultra Yen [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,194,380 | 4,093,622 |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 133,444,555 | 143,839,502 |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 77,050,081 | 78,460,456 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 210,509,514 | 99,799,256 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 58,857,582 | 52,299,177 |
| Total Trust [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,108,191,828 | 3,262,792,404 |
| Level I - Quoted Prices [Member] | ProShares UltraShort DJ-UBS Commodity [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,196,967 | 2,803,904 |
| Level I - Quoted Prices [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 419,011,935 | 87,046,389 |
| Level I - Quoted Prices [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 8,716,596 | -4,029,721 |
| Level I - Quoted Prices [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 13,658,585 | 10,042,731 |
| Level I - Quoted Prices [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 467,284 | 409,135 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 137,129,907 | 88,575,398 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -9,400 | 15,240 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 106,048,955 | 86,206,701 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -2,180 | 40,020 |
| Level I - Quoted Prices [Member] | ProShares Short Euro [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 6,666,790 | 3,409,904 |
| Level I - Quoted Prices [Member] | ProShares Short Euro [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -141,094 | -55,056 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Australian Dollar [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 22,016,137 | 3,302,907 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Australian Dollar [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -466,612 | 85,590 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Euro [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 482,820,998 | 553,430,562 |
| Level I - Quoted Prices [Member] | ProShares UltraShort Yen [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 475,704,411 | 362,743,231 |
| Level I - Quoted Prices [Member] | ProShares Ultra DJ-UBS Commodity [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 4,107,868 | 6,240,951 |
| Level I - Quoted Prices [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 136,394,297 | 437,662,650 |
| Level I - Quoted Prices [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -2,710,766 | 21,960,410 |
| Level I - Quoted Prices [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 75,238,008 | 64,313,224 |
| Level I - Quoted Prices [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,434,395 | -3,816,950 |
| Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 189,669,408 | 350,624,904 |
| Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 9,420 | -15,240 |
| Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 633,827,603 | 891,057,386 |
| Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 2,180 | -40,020 |
| Level I - Quoted Prices [Member] | ProShares Ultra Australian Dollar [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 2,999,904 | 3,570,894 |
| Level I - Quoted Prices [Member] | ProShares Ultra Australian Dollar [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 70,124 | -99,030 |
| Level I - Quoted Prices [Member] | ProShares Ultra Euro [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 2,290,933 | 4,546,944 |
| Level I - Quoted Prices [Member] | ProShares Ultra Yen [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,118,885 | 4,587,918 |
| Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 130,224,349 | 144,060,921 |
| Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,220,206 | -221,419 |
| Level I - Quoted Prices [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 77,780,701 | 79,930,866 |
| Level I - Quoted Prices [Member] | ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -730,620 | -1,470,410 |
| Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 197,516,820 | 97,440,843 |
| Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 12,992,694 | 2,057,062 |
| Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 62,307,511 | 53,686,352 |
| Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -3,449,929 | -1,387,175 |
| Level I - Quoted Prices [Member] | Total Trust [Member] | Short-Term U.S. Government and Agencies [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 3,181,730,972 | 3,335,285,580 |
| Level I - Quoted Prices [Member] | Total Trust [Member] | VIX Futures Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 21,402,298 | 13,432,436 |
| Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 200,128 | 148,502 |
| Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 34,688,207 | -5,607,060 |
| Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Gold [Member] | Forward Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 7,782,450 | 3,729,856 |
| Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Silver [Member] | Forward Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 9,083,114 | 19,307,685 |
| Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -25,932,066 | -13,147,572 |
| Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -12,519,543 | 38,114,175 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -237,372 | -306,268 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -10,995,019 | 33,333,620 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Gold [Member] | Forward Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -17,189,960 | -15,652,058 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Silver [Member] | Forward Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -80,087,349 | -145,740,706 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 190,473 | 87,159 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | 75,495 | -494,296 |
| Level II - Other Significant Observable Inputs [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | ' | 301,351 |
| Level II - Other Significant Observable Inputs [Member] | Total Trust [Member] | Forward Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -80,411,745 | -138,355,223 |
| Level II - Other Significant Observable Inputs [Member] | Total Trust [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | -38,185,641 | 24,559,466 |
| Level II - Other Significant Observable Inputs [Member] | Total Trust [Member] | Swap Agreements [Member] | ' | ' |
| Significant Accounting Policies [Line Items] | ' | ' |
| Investments, fair value disclosure | $23,655,944 | $27,870,145 |
Investments_Fair_Value_of_Deri
| Investments - Fair Value of Derivative Instruments (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | $83,749,639 | $124,994,834 |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 157,288,783 | 197,488,010 |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | ' | 55,294,030 |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 467,284 | 409,135 |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort Gold [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 7,782,450 | 3,745,096 |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort Silver [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 9,083,114 | 19,347,705 |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 200,128 | 148,502 |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 43,404,803 | ' |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 3,434,395 | ' |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares Ultra Gold [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 9,420 | ' |
| Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares Ultra Silver [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 2,180 | ' |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 237,372 | 306,268 |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 13,705,785 | ' |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Gold [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 9,400 | ' |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Silver [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 2,180 | ' |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | ' | 9,636,781 |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | ' | 3,816,950 |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Gold [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 17,189,960 | 15,667,298 |
| Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Silver [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 80,087,349 | 145,780,726 |
| Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | ' | 85,590 |
| Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 1,643,765 | 251,047 |
| Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 793,507 | 38,346,817 |
| Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares Ultra Australian Dollar [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 70,124 | ' |
| Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares Ultra Euro [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 198,744 | 89,473 |
| Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares Ultra Yen [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 78,715 | 13,523 |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares Short Euro [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 141,094 | 55,056 |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 466,612 | ' |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 27,575,831 | 13,398,619 |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 13,313,050 | 232,642 |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares Ultra Australian Dollar [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | ' | 99,030 |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares Ultra Euro [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 8,271 | 2,314 |
| Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares Ultra Yen [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 3,220 | 507,819 |
| VIX Futures Contracts [Member] | Receivables on Open Futures Contracts and Unrealized Appreciation on Swap Agreements [Member] | ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 3,316,326 | 2,368,824 |
| VIX Futures Contracts [Member] | Receivables on Open Futures Contracts and Unrealized Appreciation on Swap Agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 271,990 | 233,160 |
| VIX Futures Contracts [Member] | Receivables on Open Futures Contracts and Unrealized Appreciation on Swap Agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | 12,992,694 | 4,034,873 |
| VIX Futures Contracts [Member] | Receivables on Open Futures Contracts and Unrealized Appreciation on Swap Agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative asset not designated as hedging instrument, Unrealized Appreciation | ' | 627,059 |
| VIX Futures Contracts [Member] | Payable on Open Futures Contracts and Unrealized Depreciation on Swap Agreements [Member] | ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 96,120 | 2,590,243 |
| VIX Futures Contracts [Member] | Payable on Open Futures Contracts and Unrealized Depreciation on Swap Agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | 1,002,610 | 1,703,570 |
| VIX Futures Contracts [Member] | Payable on Open Futures Contracts and Unrealized Depreciation on Swap Agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | ' | 1,676,460 |
| VIX Futures Contracts [Member] | Payable on Open Futures Contracts and Unrealized Depreciation on Swap Agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' |
| Derivative liability not designated as hedging instrument, Unrealized Depreciation | $3,449,929 | $2,014,234 |
Investments_Effect_of_Derivati
| Investments - Effect of Derivative Instruments on Statements of Operations (Detail) (USD $) | 3 Months Ended | 9 Months Ended | ||
| Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | ($249,154,246) | ($186,273,764) | ($704,684,572) | ($632,048,181) |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 52,943,762 | 200,665,640 | -1,045,968 | 157,431,906 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 13,664 | -861,786 | 472,331 | 653,141 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -212,120 | 206,641 | 51,626 | -684,284 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -86,184,111 | -24,455,424 | -91,283,615 | 26,044,945 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 44,663,321 | 10,033,896 | 53,041,584 | 4,442,707 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 2,862,705 | -4,766,026 | 254,565 | 1,537,148 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -1,862,190 | 1,018,440 | 58,149 | -4,183,090 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares UltraShort Gold [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 6,021,147 | -10,990,296 | 39,762,664 | -9,278,044 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -44,053,880 | -13,890,127 | 4,027,954 | -42,573,500 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares UltraShort Silver [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 6,003,481 | -30,586,333 | 86,823,320 | -27,207,872 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -32,088,651 | -36,561,134 | -10,266,771 | -57,618,849 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares Ultra DJ-UBS Commodity [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -85,078 | 1,946,086 | -868,053 | -234,500 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 233,903 | -418,834 | 68,896 | 974,662 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 53,589,084 | 93,595,260 | 140,887,078 | -3,020,461 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -18,204,607 | -32,720,374 | -68,999,815 | -7,248,434 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -14,491,916 | 20,880,016 | 410,025 | -5,782,759 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 9,380,633 | -5,822,190 | 7,251,345 | 13,594,580 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares Ultra Gold [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -5,910,890 | 23,189,203 | -124,334,744 | -27,072,137 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 36,566,124 | 47,317,620 | -1,513,242 | 111,555,849 |
| Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/ or Forward Agreements/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/ or Forward Agreements [Member] | ProShares Ultra Silver [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 28,400,072 | 159,543,701 | -509,899,199 | -51,743,422 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 96,489,190 | 205,647,219 | 65,695,557 | 269,693,740 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares Short Euro [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -39,024 | -102,555 | -114,962 | -104,555 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -208,707 | 36,694 | -86,038 | -13,619 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares UltraShort Australian Dollar [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 389,254 | -123,485 | 2,294,351 | -123,485 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -1,865,253 | 1,140 | -552,202 | 1,140 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -8,625,860 | -14,572,815 | -19,722,590 | 106,381,285 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -30,678,790 | -12,582,909 | -12,784,494 | -102,605,174 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -5,693,424 | -4,756,665 | 139,331,278 | 5,696,143 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -8,391,457 | -6,717,569 | -50,633,718 | 1,720,295 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares Ultra Australian Dollar [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -123,128 | 99,030 | -863,033 | 99,030 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 277,231 | -1,930 | 169,154 | -1,930 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 41,105 | 55,097 | 12,734 | -811,701 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 227,504 | 100,337 | 103,314 | 740,490 |
| Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Foreign Currency Forward Contracts/ Changes in Unrealized Appreciation/ Depreciation on Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -20,255 | 90,137 | -1,694,827 | -131,047 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 65,431 | 146,755 | 569,791 | -56,350 |
| VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -58,627,489 | -85,611,502 | -102,880,094 | -137,705,726 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 1,983,669 | 13,014,580 | 3,441,625 | -3,298,001 |
| VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -6,929,719 | -19,925,729 | -19,676,804 | -45,669,199 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | -6,313,054 | -7,586,879 | 739,790 | -7,611,689 |
| VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | -197,375,157 | -299,188,874 | -302,301,436 | -477,920,473 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | 9,751,723 | 39,590,749 | 10,634,281 | -19,836,074 |
| VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/ Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' | ' | ' |
| Derivative Instruments, Gain (Loss) [Line Items] | ' | ' | ' | ' |
| Realized Gain or (Loss) on Derivatives Recognized in Income | 37,631,293 | 10,269,196 | 58,706,439 | 14,345,508 |
| Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income | ($2,816,258) | ($146,485) | ($2,062,754) | $439,437 |
Investments_Offsetting_of_Fina
| Investments - Offsetting of Financial Assets and Derivative Assets (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | $200,128 | $148,502 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 200,128 | 148,502 |
| ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 200,128 | 148,502 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 200,128 | 148,502 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 36,788,858 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 36,788,858 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 34,688,207 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 34,688,207 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 2,100,651 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,100,651 | ' |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 45,312 | 632,777 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 45,312 | 632,777 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 45,312 | 632,777 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 45,312 | 632,777 |
| ProShares UltraShort Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 7,784,890 | 3,729,856 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,784,890 | 3,729,856 |
| ProShares UltraShort Gold [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 2,440 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,440 | ' |
| ProShares UltraShort Gold [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 7,782,450 | 3,729,856 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,782,450 | 3,729,856 |
| ProShares UltraShort Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 9,083,694 | 19,307,685 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 9,083,694 | 19,307,685 |
| ProShares UltraShort Silver [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 580 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 580 | ' |
| ProShares UltraShort Silver [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 9,083,114 | 19,307,685 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 9,083,114 | 19,307,685 |
| ProShares Short Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 6,612 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 6,612 |
| ProShares Short Euro [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 6,612 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 6,612 |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort Australian Dollar [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 1,643,765 | 251,047 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,643,765 | 251,047 |
| ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 1,643,765 | 251,047 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,643,765 | 251,047 |
| ProShares UltraShort Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 793,507 | 38,346,817 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 793,507 | 38,346,817 |
| ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 793,507 | 38,346,817 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 793,507 | 38,346,817 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 148,502 |
| ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 36,764,035 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 36,764,035 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 33,333,620 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 33,333,620 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 3,430,415 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,430,415 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra DJ-UBS Natural Gas [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 3,980 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| ProShares Ultra Gold [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 3,980 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| ProShares Ultra Gold [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 2,520 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| ProShares Ultra Silver [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 2,520 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| ProShares Ultra Silver [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 5,180 | 12,000 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,180 | 12,000 |
| ProShares Ultra Australian Dollar [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 5,180 | 12,000 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,180 | 12,000 |
| ProShares Ultra Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 198,744 | 89,473 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 198,744 | 89,473 |
| ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 198,744 | 89,473 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 198,744 | 89,473 |
| ProShares Ultra Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 78,715 | 13,523 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 78,715 | 13,523 |
| ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 78,715 | 13,523 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 78,715 | 13,523 |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 7,590,541 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,590,541 | ' |
| ProShares VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 7,590,541 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,590,541 | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 1,619,391 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,619,391 | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 1,619,391 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,619,391 | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 30,450,046 | 301,351 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 30,450,046 | 301,351 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 301,351 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 301,351 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | 30,450,046 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 30,450,046 | ' |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 5,524,721 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 5,524,721 |
| ProShares Short VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Assets | ' | 5,524,721 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | $5,524,721 |
Investments_Financial_Assets_D
| Investments - Financial Assets, Derivative Assets, and Collateral Held by Counterparty (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | $200,128 | $148,502 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 200,128 | 148,502 |
| ProShares UltraShort DJ-UBS Commodity [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 71,108 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 71,108 | ' |
| ProShares UltraShort DJ-UBS Commodity [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 100,420 | 104,181 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 100,420 | 104,181 |
| ProShares UltraShort DJ-UBS Commodity [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 28,600 | 44,321 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 28,600 | 44,321 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 36,788,858 | ' |
| Financial Instruments | -22,648,380 | ' |
| Cash Collateral Received | -9,400,000 | ' |
| Net Amount | 4,740,478 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 10,374,607 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -9,400,000 | ' |
| Net Amount | 974,607 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 8,780,104 | ' |
| Financial Instruments | -7,893,840 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 886,264 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 10,047,630 | ' |
| Financial Instruments | -9,268,674 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 778,956 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,100,651 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 2,100,651 | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,485,866 | ' |
| Financial Instruments | -5,485,866 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 45,312 | 632,777 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 45,312 | 632,777 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 45,312 | 632,777 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 45,312 | 632,777 |
| ProShares UltraShort Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,784,890 | 3,729,856 |
| Financial Instruments | -2,953,567 | -799,600 |
| Cash Collateral Received | -2,850,000 | -2,888,500 |
| Net Amount | 1,981,323 | 41,756 |
| ProShares UltraShort Gold [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 4,474,464 | 2,389,236 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -2,850,000 | -2,389,236 |
| Net Amount | 1,624,464 | ' |
| ProShares UltraShort Gold [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,765,604 | 452,059 |
| Financial Instruments | -1,411,185 | -452,059 |
| Cash Collateral Received | ' | ' |
| Net Amount | 354,419 | ' |
| ProShares UltraShort Gold [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 607,311 | 389,297 |
| Financial Instruments | -607,311 | -347,541 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 41,756 |
| ProShares UltraShort Gold [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,440 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 2,440 | ' |
| ProShares UltraShort Gold [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 935,071 | 499,264 |
| Financial Instruments | -935,071 | ' |
| Cash Collateral Received | ' | -499,264 |
| Net Amount | ' | ' |
| ProShares UltraShort Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 9,083,694 | 19,307,685 |
| Financial Instruments | -3,622,000 | -5,207,056 |
| Cash Collateral Received | -5,461,114 | -13,555,649 |
| Net Amount | 580 | 544,980 |
| ProShares UltraShort Silver [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,461,114 | 10,786,801 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -5,461,114 | -10,300,000 |
| Net Amount | ' | 486,801 |
| ProShares UltraShort Silver [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,249,680 | 3,141,119 |
| Financial Instruments | -1,249,680 | -3,141,119 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Silver [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 561,729 | 2,124,116 |
| Financial Instruments | -561,729 | -2,065,937 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 58,179 |
| ProShares UltraShort Silver [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 580 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 580 | ' |
| ProShares UltraShort Silver [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,810,591 | 3,255,649 |
| Financial Instruments | -1,810,591 | ' |
| Cash Collateral Received | ' | -3,255,649 |
| Net Amount | ' | ' |
| ProShares Short Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 6,612 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 6,612 |
| ProShares Short Euro [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 6,612 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 6,612 |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,643,765 | 251,047 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 1,643,765 | 251,047 |
| ProShares UltraShort Euro [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,060,483 | 251,047 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 1,060,483 | 251,047 |
| ProShares UltraShort Euro [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 583,282 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 583,282 | ' |
| ProShares UltraShort Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 793,507 | 38,346,817 |
| Financial Instruments | ' | -32,549,248 |
| Cash Collateral Received | ' | ' |
| Net Amount | 793,507 | 5,797,569 |
| ProShares UltraShort Yen [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 718,095 | 18,518,532 |
| Financial Instruments | ' | -14,958,352 |
| Cash Collateral Received | ' | ' |
| Net Amount | 718,095 | 3,560,180 |
| ProShares UltraShort Yen [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 75,412 | 19,828,285 |
| Financial Instruments | ' | -17,590,896 |
| Cash Collateral Received | ' | ' |
| Net Amount | 75,412 | 2,237,389 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 148,502 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 148,502 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 36,764,035 |
| Financial Instruments | ' | -20,513,980 |
| Cash Collateral Received | ' | -8,989,866 |
| Net Amount | ' | 7,260,189 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 14,334,730 |
| Financial Instruments | ' | -11,924,574 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 2,410,156 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 10,009,024 |
| Financial Instruments | ' | -8,589,406 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 1,419,618 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,430,415 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 3,430,415 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 8,989,866 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -8,989,866 |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 3,980 |
| ProShares Ultra Gold [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 3,980 |
| ProShares Ultra Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 2,520 |
| ProShares Ultra Silver [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 2,520 |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,180 | 12,000 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 5,180 | 12,000 |
| ProShares Ultra Australian Dollar [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,180 | 12,000 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 5,180 | 12,000 |
| ProShares Ultra Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 198,744 | 89,473 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 198,744 | 89,473 |
| ProShares Ultra Euro [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 55,456 | 38,327 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 55,456 | 38,327 |
| ProShares Ultra Euro [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 143,288 | 51,146 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 143,288 | 51,146 |
| ProShares Ultra Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 78,715 | 13,523 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 78,715 | 13,523 |
| ProShares Ultra Yen [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 37,892 | 7,325 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 37,892 | 7,325 |
| ProShares Ultra Yen [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 40,823 | 6,198 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 40,823 | 6,198 |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,590,541 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 7,590,541 | ' |
| ProShares VIX Short-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,590,541 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 7,590,541 | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,619,391 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 1,619,391 | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,619,391 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 1,619,391 | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 30,450,046 | 301,351 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | 301,351 |
| Net Amount | 30,450,046 | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 301,351 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | 301,351 |
| Net Amount | ' | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 30,450,046 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | 30,450,046 | ' |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 5,524,721 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 5,524,721 |
| ProShares Short VIX Short-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 5,524,721 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | $5,524,721 |
Investments_Offsetting_of_Fina1
| Investments - Offsetting of Financial Liabilities and Derivative Liabilities (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 6,586,396 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 6,586,396 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 5,607,060 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 5,607,060 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 979,336 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 979,336 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 3,980 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 3,980 |
| ProShares UltraShort Gold [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 3,980 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 3,980 |
| ProShares UltraShort Gold [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares UltraShort Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 2,520 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 2,520 |
| ProShares UltraShort Silver [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 2,520 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 2,520 |
| ProShares UltraShort Silver [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares Short Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 3,225 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 3,225 | ' |
| ProShares Short Euro [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 3,225 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 3,225 | ' |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 36,330 | 10,950 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 36,330 | 10,950 |
| ProShares UltraShort Australian Dollar [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 36,330 | 10,950 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 36,330 | 10,950 |
| ProShares UltraShort Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 27,575,831 | 13,398,619 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 27,575,831 | 13,398,619 |
| ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 27,575,831 | 13,398,619 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 27,575,831 | 13,398,619 |
| ProShares UltraShort Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 13,313,050 | 232,642 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 13,313,050 | 232,642 |
| ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 13,313,050 | 232,642 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 13,313,050 | 232,642 |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 237,372 | 306,268 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 237,372 | 306,268 |
| ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 237,372 | 306,268 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 237,372 | 306,268 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 11,767,989 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 11,767,989 | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 10,995,019 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 10,995,019 | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 772,970 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 772,970 | ' |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 1,999,143 | 4,891,783 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 1,999,143 | 4,891,783 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 1,999,143 | 4,891,783 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 1,999,143 | 4,891,783 |
| ProShares Ultra Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 17,192,400 | 15,652,058 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 17,192,400 | 15,652,058 |
| ProShares Ultra Gold [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 2,440 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 2,440 | ' |
| ProShares Ultra Gold [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 17,189,960 | 15,652,058 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 17,189,960 | 15,652,058 |
| ProShares Ultra Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 80,089,129 | 145,740,706 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 80,089,129 | 145,740,706 |
| ProShares Ultra Silver [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 1,780 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 1,780 | ' |
| ProShares Ultra Silver [Member] | Forward Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 80,087,349 | 145,740,706 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 80,087,349 | 145,740,706 |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra Australian Dollar [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 8,271 | 2,314 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 8,271 | 2,314 |
| ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 8,271 | 2,314 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 8,271 | 2,314 |
| ProShares Ultra Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 3,220 | 507,819 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 3,220 | 507,819 |
| ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 3,220 | 507,819 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 3,220 | 507,819 |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 31,540,181 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 31,540,181 |
| ProShares VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 31,540,181 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 31,540,181 |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 1,890,675 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 1,890,675 |
| ProShares VIX Mid-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 1,890,675 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 1,890,675 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 35,666,735 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 35,666,735 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | ' | 35,666,735 |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | ' | 35,666,735 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 5,707,549 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | 5,707,549 | ' |
| ProShares Short VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Gross Amounts of Recognized Liabilities | 5,707,549 | ' |
| Gross Amounts Offset in the Statement of Financial Condition | ' | ' |
| Net Amounts of Liabilities Presented in the Statement of Financial Condition | $5,707,549 | ' |
Investments_Financial_Liabilit
| Investments - Financial Liabilities, Derivative Liabilities, and Collateral Pledged by Counterparty (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 6,586,396 |
| Financial Instruments | ' | -5,607,060 |
| Cash Collateral Received | ' | -979,336 |
| Net Amount | ' | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 5,607,060 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 979,336 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 979,336 |
| Cash Collateral Received | ' | -979,336 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 1,880,292 |
| Financial Instruments | ' | -1,880,292 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 1,730,366 |
| Financial Instruments | ' | -1,730,366 |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 1,996,402 |
| Financial Instruments | ' | -1,996,402 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -3,980 |
| Net Amount | ' | ' |
| ProShares UltraShort Gold [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| ProShares UltraShort Gold [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 3,980 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -3,980 |
| Net Amount | ' | ' |
| ProShares UltraShort Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -2,520 |
| Net Amount | ' | ' |
| ProShares UltraShort Silver [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| ProShares UltraShort Silver [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 2,520 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -2,520 |
| Net Amount | ' | ' |
| ProShares Short Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 3,225 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -3,225 | ' |
| Net Amount | ' | ' |
| ProShares Short Euro [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 3,225 | ' |
| ProShares Short Euro [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 3,225 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -3,225 | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 36,330 | 10,950 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -36,330 | -10,950 |
| Net Amount | ' | ' |
| ProShares UltraShort Australian Dollar [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 36,330 | 10,950 |
| ProShares UltraShort Australian Dollar [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 36,330 | 10,950 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -36,330 | -10,950 |
| Net Amount | ' | ' |
| ProShares UltraShort Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 27,575,831 | 13,398,619 |
| Financial Instruments | -27,575,831 | -13,398,619 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Euro [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 13,695,213 | 6,048,832 |
| Financial Instruments | -13,695,213 | -6,048,832 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Euro [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 13,880,618 | 7,349,787 |
| Financial Instruments | -13,880,618 | -7,349,787 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 13,313,050 | 232,642 |
| Financial Instruments | -13,313,050 | -232,642 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Yen [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 7,048,993 | ' |
| Financial Instruments | -7,048,993 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares UltraShort Yen [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 6,264,057 | 232,642 |
| Financial Instruments | -6,264,057 | -232,642 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 237,372 | 306,268 |
| Financial Instruments | -237,372 | -306,268 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Commodity [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 237,372 | 306,268 |
| ProShares Ultra DJ-UBS Commodity [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 113,209 | 198,117 |
| Financial Instruments | -113,209 | -198,117 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Commodity [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 50,607 | 108,151 |
| Financial Instruments | -50,607 | -108,151 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Commodity [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 73,556 | ' |
| Financial Instruments | -73,556 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 11,767,989 | ' |
| Financial Instruments | -10,995,019 | ' |
| Cash Collateral Received | -772,970 | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 10,995,019 | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 772,970 | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 772,970 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -772,970 | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 3,504,152 | ' |
| Financial Instruments | -3,504,152 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,910,928 | ' |
| Financial Instruments | -1,910,928 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 3,151,637 | ' |
| Financial Instruments | -3,151,637 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Crude Oil [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,428,302 | ' |
| Financial Instruments | -2,428,302 | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,999,143 | 4,891,783 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -1,999,143 | -4,891,783 |
| Net Amount | ' | ' |
| ProShares Ultra DJ-UBS Natural Gas [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,999,143 | 4,891,783 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,999,143 | 4,891,783 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -1,999,143 | -4,891,783 |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 17,192,400 | 15,652,058 |
| Financial Instruments | -17,189,960 | -15,652,058 |
| Cash Collateral Received | -2,440 | ' |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,440 | ' |
| ProShares Ultra Gold [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,440 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -2,440 | ' |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 4,079,114 | 3,678,367 |
| Financial Instruments | -4,079,114 | -3,678,367 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,180,790 | 3,715,989 |
| Financial Instruments | -2,180,790 | -3,715,989 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,519,308 | 3,634,829 |
| Financial Instruments | -1,519,308 | -3,634,829 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Gold [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 9,410,748 | 4,622,873 |
| Financial Instruments | -9,410,748 | -4,622,873 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Silver [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 80,089,129 | 145,740,706 |
| Financial Instruments | -80,087,349 | -143,623,808 |
| Cash Collateral Received | -1,780 | ' |
| Net Amount | ' | 2,116,898 |
| ProShares Ultra Silver [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,780 | ' |
| ProShares Ultra Silver [Member] | Goldman Sachs & Co. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,780 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -1,780 | ' |
| Net Amount | ' | ' |
| ProShares Ultra Silver [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 24,037,958 | 34,491,042 |
| Financial Instruments | -24,037,958 | -34,491,042 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Silver [Member] | Societe Generale S.A. [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 11,898,455 | 34,802,217 |
| Financial Instruments | -11,898,455 | -34,802,217 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Silver [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 4,092,558 | 31,574,331 |
| Financial Instruments | -4,092,558 | -31,574,331 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Silver [Member] | Deutsche Bank AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 40,058,378 | 44,873,116 |
| Financial Instruments | -40,058,378 | -42,756,218 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 2,116,898 |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Australian Dollar [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra Euro [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 8,271 | 2,314 |
| Financial Instruments | -8,271 | -2,314 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Euro [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 6,697 | 635 |
| Financial Instruments | -6,697 | -635 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Euro [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 1,574 | 1,679 |
| Financial Instruments | -1,574 | -1,679 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Yen [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 3,220 | 507,819 |
| Financial Instruments | -3,220 | -410,046 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 97,773 |
| ProShares Ultra Yen [Member] | Goldman Sachs International [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 2,496 | 231,047 |
| Financial Instruments | -2,496 | -231,047 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | ' |
| ProShares Ultra Yen [Member] | UBS AG [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 724 | 276,772 |
| Financial Instruments | -724 | -178,999 |
| Cash Collateral Received | ' | ' |
| Net Amount | ' | 97,773 |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 31,540,181 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -31,540,181 |
| Net Amount | ' | ' |
| ProShares VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 31,540,181 |
| ProShares VIX Short-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 31,540,181 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -31,540,181 |
| Net Amount | ' | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 1,890,675 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -1,890,675 |
| Net Amount | ' | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 1,890,675 |
| ProShares VIX Mid-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 1,890,675 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -1,890,675 |
| Net Amount | ' | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 35,666,735 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -35,666,735 |
| Net Amount | ' | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 35,666,735 |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | ' | 35,666,735 |
| Financial Instruments | ' | ' |
| Cash Collateral Received | ' | -35,666,735 |
| Net Amount | ' | ' |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,707,549 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -5,707,549 | ' |
| Net Amount | ' | ' |
| ProShares Short VIX Short-Term Futures ETF [Member] | Future Contracts [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,707,549 | ' |
| ProShares Short VIX Short-Term Futures ETF [Member] | RBC Capital Markets [Member] | ' | ' |
| Derivative [Line Items] | ' | ' |
| Net Amounts of Assets Presented in the Statement of Financial Condition | 5,707,549 | ' |
| Financial Instruments | ' | ' |
| Cash Collateral Received | -5,707,549 | ' |
| Net Amount | ' | ' |
Agreements_Additional_Informat
| Agreements - Additional Information (Detail) (USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| Health Care Trust Fund [Line Items] | ' |
| Percentage of annual NAV as limit to pay SEC registration fees incurred | 0.02% |
| Ceiling for legal fees | $100,000 |
| Ceiling for per annum K-1 preparation and mailing fees against annual NAV | 0.10% |
| Leverage Fund [Member] | ' |
| Health Care Trust Fund [Line Items] | ' |
| Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund | 0.95% |
| Geared VIX Fund [Member] | ' |
| Health Care Trust Fund [Line Items] | ' |
| Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund | 0.95% |
| Short Euro Fund [Member] | ' |
| Health Care Trust Fund [Line Items] | ' |
| Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund | 0.95% |
| Volatility Index Fund [Member] | ' |
| Health Care Trust Fund [Line Items] | ' |
| Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund | 0.85% |
Offering_Costs_Additional_Info
| Offering Costs - Additional Information (Detail) | 9 Months Ended |
| Sep. 30, 2013 | |
| M | |
| Organization And Offering Costs [Line Items] | ' |
| Offering costs, amortization period, months | 12 |
| Sponsor reimbursement of organization and offering costs, maximum for each Leveraged Fund | 0.85% |
| New Fund [Member] | ' |
| Organization And Offering Costs [Line Items] | ' |
| Sponsor reimbursement of organization and offering costs, maximum for each Leveraged Fund | 0.95% |
Creation_and_Redemption_of_Cre2
| Creation and Redemption of Creation Units - Additional Information (Detail) (USD $) | 9 Months Ended |
| Sep. 30, 2013 | |
| Creation And Redemption Of Creation Units [Line Items] | ' |
| Creation Unit, block Shares of a Fund | 50,000 |
| Fixed transaction fee per Creation Unit | $500 |
| Variable transaction fee, percent of the value of the Creation Unit, maximum | 0.10% |
| Volatility Index Fund [Member] | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' |
| Creation Unit, block Shares of a Fund | 25,000 |
Creation_and_Redemption_of_Cre3
| Creation and Redemption of Creation Units (Schedule of Transaction Fees) (Detail) (USD $) | 3 Months Ended | 9 Months Ended |
| Sep. 30, 2013 | Sep. 30, 2013 | |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | $474,189 | $1,504,810 |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 119,865 | 237,750 |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 1,251 | 5,700 |
| ProShares UltraShort Gold [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 19,262 | 62,352 |
| ProShares UltraShort Silver [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 43,020 | 111,025 |
| ProShares Short Euro [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares UltraShort Australian Dollar [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares UltraShort Euro [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares UltraShort Yen [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | 283 |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 41,709 | 188,267 |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 8,303 | 25,719 |
| ProShares Ultra Gold [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 7,284 | 21,066 |
| ProShares Ultra Silver [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 25,625 | 91,299 |
| ProShares Ultra Australian Dollar [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares Ultra Euro [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares Ultra Yen [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | ' | ' |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | 182,504 | 659,703 |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' |
| Creation And Redemption Of Creation Units [Line Items] | ' | ' |
| Transaction fees | $25,366 | $101,646 |
Financial_Highlights_Per_Share
| Financial Highlights - Per Share Operating Performance (Detail) (USD $) | 3 Months Ended | 9 Months Ended | ||
| Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | |
| ProShares UltraShort DJ-UBS Commodity [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $65.89 | $59.06 | $54.10 | $56.92 |
| Net investment income (loss) | ($0.14) | ($0.11) | ($0.39) | ($0.37) |
| Net realized and unrealized gain (loss) | ($3.31) | ($10.92) | $8.73 | ($8.52) |
| Change in net asset value from operations | ($3.45) | ($11.03) | $8.34 | ($8.89) |
| Net asset value, at September 30, 2013 | $62.44 | $48.03 | $62.44 | $48.03 |
| Market value per share, at June 30, 2013b | $64.97 | $58.64 | $51.64 | $56.19 |
| Market value per share, at September 30, 2013b | $57.37 | $48.25 | $57.37 | $48.25 |
| Total Return, at net asset value | -5.20% | -18.70% | 15.40% | -15.60% |
| Total Return, at market value | -11.70% | -17.70% | 11.10% | -14.10% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.88% | -0.89% | -0.90% |
| ProShares UltraShort DJ-UBS Crude Oil [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $36.34 | $49.23 | $40.31 | $38.82 |
| Net investment income (loss) | ($0.07) | ($0.09) | ($0.23) | ($0.26) |
| Net realized and unrealized gain (loss) | ($6.01) | ($8.54) | ($9.82) | $2.05 |
| Change in net asset value from operations | ($6.08) | ($8.63) | ($10.04) | $1.78 |
| Net asset value, at September 30, 2013 | $30.26 | $40.60 | $30.26 | $40.60 |
| Market value per share, at June 30, 2013b | $36.45 | $49.42 | $40.44 | $38.69 |
| Market value per share, at September 30, 2013b | $30.25 | $40.72 | $30.25 | $40.72 |
| Total Return, at net asset value | -16.70% | -17.50% | -24.90% | 4.60% |
| Total Return, at market value | -17.00% | -17.60% | -25.20% | 5.20% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.97% | -0.98% | -0.98% | -0.98% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.94% | -0.91% | -0.93% | -0.92% |
| ProShares UltraShort DJ-UBS Natural Gas [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $88.57 | $121.27 | $102.14 | $95.22 |
| Net investment income (loss) | ($0.25) | ($0.34) | ($0.68) | ($1.41) |
| Net realized and unrealized gain (loss) | $3.33 | ($32.38) | ($9.81) | ($5.26) |
| Change in net asset value from operations | $3.08 | ($32.72) | ($10.49) | ($6.67) |
| Net asset value, at September 30, 2013 | $91.65 | $88.55 | $91.65 | $88.55 |
| Market value per share, at June 30, 2013b | $88 | $120.52 | $101.64 | $95.84 |
| Market value per share, at September 30, 2013b | $91.86 | $88.56 | $91.86 | $88.56 |
| Total Return, at net asset value | 3.50% | -27.00% | -10.30% | -7.00% |
| Total Return, at market value | 4.40% | -26.50% | -9.60% | -7.60% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -1.17% | -1.27% | -1.20% | -1.43% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -1.14% | -1.22% | -1.15% | -1.39% |
| ProShares UltraShort Gold [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $114.10 | $70.99 | $63.87 | $82.71 |
| Net investment income (loss) | ($0.21) | ($0.15) | ($0.54) | ($0.46) |
| Net realized and unrealized gain (loss) | ($25.78) | ($14.52) | $24.78 | ($25.93) |
| Change in net asset value from operations | ($25.99) | ($14.67) | $24.24 | ($26.39) |
| Net asset value, at September 30, 2013 | $88.11 | $56.32 | $88.11 | $56.32 |
| Market value per share, at June 30, 2013b | $106.50 | $70.92 | $62.60 | $79.24 |
| Market value per share, at September 30, 2013b | $87.88 | $56.48 | $87.88 | $56.48 |
| Total Return, at net asset value | -22.80% | -20.70% | 38.00% | -31.90% |
| Total Return, at market value | -17.50% | -20.40% | 40.40% | -28.70% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.88% | -0.90% | -0.90% |
| ProShares UltraShort Silver [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $110.60 | $69.92 | $51.40 | $76.68 |
| Net investment income (loss) | ($0.19) | ($0.13) | ($0.44) | ($0.38) |
| Net realized and unrealized gain (loss) | ($33.84) | ($29.92) | $25.61 | ($36.42) |
| Change in net asset value from operations | ($34.03) | ($30.05) | $25.17 | ($36.80) |
| Net asset value, at September 30, 2013 | $76.57 | $39.88 | $76.57 | $39.88 |
| Market value per share, at June 30, 2013b | $101.27 | $67.82 | $50.07 | $79.35 |
| Market value per share, at September 30, 2013b | $76.49 | $40.14 | $76.49 | $40.14 |
| Total Return, at net asset value | -30.80% | -43.00% | 49.00% | -48.00% |
| Total Return, at market value | -24.50% | -40.80% | 52.80% | -49.40% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.87% | -0.89% | -0.90% |
| ProShares Short Euro [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $37.93 | $39.47 | $37.63 | $40 |
| Net investment income (loss) | ($0.09) | ($0.09) | ($0.26) | ($0.10) |
| Net realized and unrealized gain (loss) | ($1.45) | ($0.66) | ($0.98) | ($1.18) |
| Change in net asset value from operations | ($1.54) | ($0.75) | ($1.24) | ($1.28) |
| Net asset value, at September 30, 2013 | $36.39 | $38.72 | $36.39 | $38.72 |
| Market value per share, at June 30, 2013b | $38.01 | $39.49 | $37.64 | $40 |
| Market value per share, at September 30, 2013b | $36.41 | $38.64 | $36.41 | $38.64 |
| Total Return, at net asset value | -4.10% | -1.90% | -3.30% | -3.20% |
| Total Return, at market value | -4.20% | -2.20% | -3.30% | -3.40% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.97% | -0.96% | -0.96% | -0.97% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.95% | -0.90% | -0.93% | -0.91% |
| ProShares UltraShort Australian Dollar [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $46.41 | $40 | $37.81 | $40 |
| Net investment income (loss) | ($0.11) | ($0.08) | ($0.33) | ($0.08) |
| Net realized and unrealized gain (loss) | ($2.70) | ($1.22) | $6.11 | ($1.22) |
| Change in net asset value from operations | ($2.81) | ($1.30) | $5.79 | ($1.30) |
| Net asset value, at September 30, 2013 | $43.60 | $38.70 | $43.60 | $38.70 |
| Market value per share, at June 30, 2013b | $46.54 | $40 | $37.74 | $40 |
| Market value per share, at September 30, 2013b | $43.54 | $38.62 | $43.54 | $38.62 |
| Total Return, at net asset value | -6.10% | -3.20% | 15.30% | -3.20% |
| Total Return, at market value | -6.40% | -3.50% | 15.40% | -3.50% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -1.02% | -1.03% | -1.03% | -1.03% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.99% | -0.95% | -0.99% | -0.95% |
| ProShares UltraShort Euro [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $19.29 | $20.91 | $19.02 | $20.34 |
| Net investment income (loss) | ($0.04) | ($0.05) | ($0.13) | ($0.14) |
| Net realized and unrealized gain (loss) | ($1.51) | ($0.73) | ($1.15) | ($0.07) |
| Change in net asset value from operations | ($1.55) | ($0.78) | ($1.28) | ($0.21) |
| Net asset value, at September 30, 2013 | $17.74 | $20.13 | $17.74 | $20.13 |
| Market value per share, at June 30, 2013b | $19.29 | $20.90 | $19.01 | $20.35 |
| Market value per share, at September 30, 2013b | $17.75 | $20.12 | $17.75 | $20.12 |
| Total Return, at net asset value | -8.00% | -3.70% | -6.70% | -1.00% |
| Total Return, at market value | -8.00% | -3.70% | -6.60% | -1.10% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.92% | -0.88% | -0.90% | -0.90% |
| ProShares UltraShort Yen [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $64.11 | $43.53 | $50.76 | $40.96 |
| Net investment income (loss) | ($0.15) | ($0.09) | ($0.42) | ($0.29) |
| Net realized and unrealized gain (loss) | ($1.77) | ($2.14) | $11.85 | $0.63 |
| Change in net asset value from operations | ($1.92) | ($2.24) | $11.43 | $0.34 |
| Net asset value, at September 30, 2013 | $62.19 | $41.30 | $62.19 | $41.30 |
| Market value per share, at June 30, 2013b | $64.08 | $43.51 | $50.77 | $40.95 |
| Market value per share, at September 30, 2013b | $62.23 | $41.33 | $62.23 | $41.33 |
| Total Return, at net asset value | -3.00% | -5.10% | 22.50% | 0.80% |
| Total Return, at market value | -2.90% | -5.00% | 22.60% | 0.90% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.92% | -0.88% | -0.90% | -0.89% |
| ProShares Ultra DJ-UBS Commodity [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $19.26 | $23.52 | $24.39 | $25.88 |
| Net investment income (loss) | ($0.05) | ($0.06) | ($0.15) | ($0.17) |
| Net realized and unrealized gain (loss) | $0.74 | $4.54 | ($4.28) | $2.29 |
| Change in net asset value from operations | $0.70 | $4.48 | ($4.43) | $2.12 |
| Net asset value, at September 30, 2013 | $19.96 | $28.00 | $19.96 | $28.00 |
| Market value per share, at June 30, 2013b | $18.96 | $23.66 | $23.93 | $25.64 |
| Market value per share, at September 30, 2013b | $19.92 | $27.71 | $19.92 | $27.71 |
| Total Return, at net asset value | 3.60% | 19.10% | -18.20% | 8.20% |
| Total Return, at market value | 5.10% | 17.10% | -16.80% | 8.10% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.88% | -0.90% | -0.90% |
| ProShares Ultra DJ-UBS Crude Oil [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $30.16 | $27.71 | $29.39 | $40.88 |
| Net investment income (loss) | ($0.09) | ($0.07) | ($0.21) | ($0.24) |
| Net realized and unrealized gain (loss) | $4.63 | $3.67 | $5.53 | $9.33 |
| Change in net asset value from operations | $4.55 | $3.60 | $5.32 | ($9.57) |
| Net asset value, at September 30, 2013 | $34.71 | $31.31 | $34.71 | $31.31 |
| Market value per share, at June 30, 2013b | $30.11 | $27.54 | $29.32 | $40.94 |
| Market value per share, at September 30, 2013b | $34.73 | $31.21 | $34.73 | $31.21 |
| Total Return, at net asset value | 15.10% | 13.00% | 18.10% | -23.40% |
| Total Return, at market value | 15.30% | 13.30% | 18.50% | -23.80% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.96% | -0.97% | -0.97% | -0.97% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.93% | -0.90% | -0.91% | -0.92% |
| ProShares Ultra DJ-UBS Natural Gas [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $36.02 | $45.69 | $39.05 | $101.98 |
| Net investment income (loss) | ($0.09) | ($0.12) | ($0.31) | ($0.38) |
| Net realized and unrealized gain (loss) | ($3.67) | $5.57 | ($6.48) | ($50.45) |
| Change in net asset value from operations | ($3.76) | $5.45 | ($6.79) | ($50.84) |
| Net asset value, at September 30, 2013 | $32.26 | $51.14 | $32.26 | $51.14 |
| Market value per share, at June 30, 2013b | $36.26 | $45.75 | $39.24 | $101.35 |
| Market value per share, at September 30, 2013b | $32.18 | $51.09 | $32.18 | $51.09 |
| Total Return, at net asset value | -10.40% | 11.90% | -17.40% | -49.80% |
| Total Return, at market value | -11.30% | 11.70% | -18.00% | -49.60% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -1.11% | -1.14% | -1.13% | -1.22% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -1.08% | -1.08% | -1.08% | -1.16% |
| ProShares Ultra Gold [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $41.68 | $79.76 | $83.76 | $75.91 |
| Net investment income (loss) | ($0.12) | ($0.19) | ($0.43) | ($0.57) |
| Net realized and unrealized gain (loss) | $9.19 | $17.60 | ($32.58) | $21.84 |
| Change in net asset value from operations | $9.07 | $17.41 | ($33.01) | $21.27 |
| Net asset value, at September 30, 2013 | $50.75 | $97.17 | $50.75 | $97.17 |
| Market value per share, at June 30, 2013b | $44.63 | $79.74 | $85.34 | $79.01 |
| Market value per share, at September 30, 2013b | $50.86 | $96.92 | $50.86 | $96.92 |
| Total Return, at net asset value | 21.80% | 21.80% | -39.40% | 28.00% |
| Total Return, at market value | 14.00% | 21.50% | -40.40% | 22.70% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.88% | -0.88% | -0.89% |
| ProShares Ultra Silver [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $15.74 | $37.03 | $42.97 | $43.19 |
| Net investment income (loss) | ($0.05) | ($0.10) | ($0.18) | ($0.32) |
| Net realized and unrealized gain (loss) | $4.37 | $21.86 | ($22.72) | $15.93 |
| Change in net asset value from operations | $4.33 | $21.77 | ($22.90) | $15.61 |
| Net asset value, at September 30, 2013 | $20.07 | $58.80 | $20.07 | $58.80 |
| Market value per share, at June 30, 2013b | $17 | $38.13 | $44.10 | $41.65 |
| Market value per share, at September 30, 2013b | $20.05 | $58.35 | $20.05 | $58.35 |
| Total Return, at net asset value | 27.50% | 58.80% | -53.30% | 36.10% |
| Total Return, at market value | 17.90% | 53.00% | -54.50% | 40.10% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.88% | -0.88% | -0.90% |
| ProShares Ultra Australian Dollar [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $32.83 | $40 | $41.50 | $40 |
| Net investment income (loss) | ($0.08) | ($0.08) | ($0.27) | ($0.08) |
| Net realized and unrealized gain (loss) | $1.54 | $0.97 | ($6.94) | $0.97 |
| Change in net asset value from operations | $1.46 | $0.89 | ($7.21) | $0.89 |
| Net asset value, at September 30, 2013 | $34.29 | $40.89 | $34.29 | $40.89 |
| Market value per share, at June 30, 2013b | $33.96 | $40 | $41.45 | $40 |
| Market value per share, at September 30, 2013b | $34.35 | $40.90 | $34.35 | $40.90 |
| Total Return, at net asset value | 4.40% | 2.20% | -17.40% | 2.20% |
| Total Return, at market value | 1.10% | 2.30% | -17.10% | 2.30% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -1.00% | -1.02% | -0.99% | -1.02% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.97% | -0.94% | -0.95% | -0.94% |
| ProShares Ultra Euro [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $23.47 | $22.64 | $24.35 | $23.89 |
| Net investment income (loss) | ($0.06) | ($0.05) | ($0.16) | ($0.16) |
| Net realized and unrealized gain (loss) | $1.83 | $0.62 | $1.06 | ($0.52) |
| Change in net asset value from operations | $1.78 | $0.57 | $0.90 | ($0.68) |
| Net asset value, at September 30, 2013 | $25.25 | $23.21 | $25.25 | $23.21 |
| Market value per share, at June 30, 2013b | $23.25 | $22.62 | $24.32 | $23.87 |
| Market value per share, at September 30, 2013b | $25.30 | $23.18 | $25.30 | $23.18 |
| Total Return, at net asset value | 7.60% | 2.50% | 3.70% | -2.80% |
| Total Return, at market value | 8.80% | 2.50% | 4.00% | -2.90% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.88% | -0.90% | -0.90% |
| ProShares Ultra Yen [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $21.22 | $33.49 | $28.18 | $36.47 |
| Net investment income (loss) | ($0.05) | ($0.08) | ($0.15) | ($0.23) |
| Net realized and unrealized gain (loss) | $0.30 | $1.58 | ($6.56) | ($1.25) |
| Change in net asset value from operations | $0.25 | $1.50 | ($6.71) | ($1.47) |
| Net asset value, at September 30, 2013 | $21.47 | $35.00 | $21.47 | $35.00 |
| Market value per share, at June 30, 2013b | $21.10 | $33.39 | $28.28 | $36.50 |
| Market value per share, at September 30, 2013b | $21.70 | $35.28 | $21.70 | $35.28 |
| Total Return, at net asset value | 1.20% | 4.50% | -23.80% | -4.00% |
| Total Return, at market value | 2.80% | 5.70% | -23.30% | -3.30% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.95% | -0.95% | -0.95% | -0.95% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -0.91% | -0.87% | -0.89% | -0.89% |
| ProShares VIX Short-Term Futures ETF [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $55.94 | $160.04 | $83.94 | $381.87 |
| Net investment income (loss) | ($0.09) | ($0.24) | ($0.31) | ($0.97) |
| Net realized and unrealized gain (loss) | ($16.31) | ($64.79) | ($44.08) | ($285.89) |
| Change in net asset value from operations | ($16.39) | ($65.03) | ($44.39) | ($286.85) |
| Net asset value, at September 30, 2013 | $39.55 | $95.02 | $39.55 | $95.02 |
| Market value per share, at June 30, 2013b | $55.91 | $161.60 | $85.05 | $378.70 |
| Market value per share, at September 30, 2013b | $39.45 | $96.10 | $39.45 | $96.10 |
| Total Return, at net asset value | -29.30% | -40.60% | -52.90% | -75.10% |
| Total Return, at market value | -29.40% | -40.50% | -53.60% | -74.60% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.85% | -0.85% | -0.85% | -0.85% |
| Expense ratio, excluding brokerage commissions | -0.85% | -0.85% | -0.85% | -0.85% |
| Net investment income (loss) | -0.83% | -0.79% | -0.81% | -0.80% |
| ProShares VIX Mid-Term Futures ETF [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $28.29 | $55.04 | $34.70 | $74.14 |
| Net investment income (loss) | ($0.05) | ($0.10) | ($0.15) | ($0.35) |
| Net realized and unrealized gain (loss) | ($5.06) | ($13.43) | ($11.37) | ($32.29) |
| Change in net asset value from operations | ($5.11) | ($13.53) | ($11.52) | ($32.63) |
| Net asset value, at September 30, 2013 | $23.18 | $41.51 | $23.18 | $41.51 |
| Market value per share, at June 30, 2013b | $28.25 | $55.08 | $34.22 | $74.13 |
| Market value per share, at September 30, 2013b | $23.02 | $41.66 | $23.02 | $41.66 |
| Total Return, at net asset value | -18.10% | -24.60% | -33.20% | -44.00% |
| Total Return, at market value | -18.50% | -24.40% | -32.70% | -43.80% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -0.85% | -0.85% | -0.85% | -0.85% |
| Expense ratio, excluding brokerage commissions | -0.85% | -0.85% | -0.85% | -0.85% |
| Net investment income (loss) | -0.82% | -0.80% | -0.81% | -0.81% |
| ProShares Ultra VIX Short-Term Futures ETF [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $72.00 | $962.11 | $201.32 | $7,412.69 |
| Net investment income (loss) | ($0.18) | ($2.19) | ($0.78) | ($10.68) |
| Net realized and unrealized gain (loss) | ($37.29) | ($656.02) | ($166.01) | ($7,098.10) |
| Change in net asset value from operations | ($37.47) | ($658.20) | ($166.79) | ($7,108.78) |
| Net asset value, at September 30, 2013 | $34.53 | $303.90 | $34.53 | $303.90 |
| Market value per share, at June 30, 2013b | $71.69 | $984 | $209 | $7,296 |
| Market value per share, at September 30, 2013b | $34.34 | $309.20 | $34.34 | $309.20 |
| Total Return, at net asset value | -52.00% | -68.40% | -82.90% | -95.90% |
| Total Return, at market value | -52.10% | -68.60% | -83.60% | -95.80% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -1.81% | -1.67% | -1.84% | -1.74% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -1.79% | -1.64% | -1.82% | -1.71% |
| ProShares Short VIX Short-Term Futures ETF [Member] | ' | ' | ' | ' |
| Financial Highlights [Line Items] | ' | ' | ' | ' |
| Net asset value, at June 30, 2013 | $78.26 | $45.28 | $66.13 | $25.87 |
| Net investment income (loss) | ($0.38) | ($0.29) | ($1.02) | ($0.61) |
| Net realized and unrealized gain (loss) | $27.13 | $23.06 | $39.90 | $42.79 |
| Change in net asset value from operations | $26.75 | $22.77 | $38.89 | $42.18 |
| Net asset value, at September 30, 2013 | $105.02 | $68.05 | $105.02 | $68.05 |
| Market value per share, at June 30, 2013b | $78.45 | $44.92 | $65.45 | $26.14 |
| Market value per share, at September 30, 2013b | $105.14 | $67.37 | $105.14 | $67.37 |
| Total Return, at net asset value | 34.20% | 50.30% | 58.80% | 163.10% |
| Total Return, at market value | 34.00% | 50.00% | 60.60% | 157.70% |
| Ratios to Average Net Assets | ' | ' | ' | ' |
| Expense ratio | -1.54% | -2.16% | -1.54% | -1.88% |
| Expense ratio, excluding brokerage commissions | -0.95% | -0.95% | -0.95% | -0.95% |
| Net investment income (loss) | -1.51% | -2.08% | -1.50% | -1.82% |
Risk_Additional_Information_De
| Risk - Additional Information (Detail) | 9 Months Ended |
| Sep. 30, 2013 | |
| Unusual Risk or Uncertainty [Line Items] | ' |
| Percentage of calculation on simple inverse correlation | 200.00% |
| UltraShort Fund [Member] | ' |
| Unusual Risk or Uncertainty [Line Items] | ' |
| Leverage risk benchmark | '50% at any point in the day |
| Forward Agreements [Member] | ' |
| Unusual Risk or Uncertainty [Line Items] | ' |
| Exposure to swap agreements or forward contracts | 100.00% |