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Statement of Changes in Shareholders' Equity (USD $)
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ProShares UltraShort Bloomberg Commodity [Member]
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ProShares UltraShort Bloomberg Crude Oil [Member]
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ProShares UltraShort Bloomberg Natural Gas [Member]
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ProShares UltraShort Gold [Member]
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ProShares UltraShort Silver [Member]
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ProShares Short Euro [Member]
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ProShares UltraShort Australian Dollar [Member]
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ProShares UltraShort Euro [Member]
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ProShares UltraShort Yen [Member]
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ProShares Ultra Bloomberg Commodity [Member]
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ProShares Ultra Bloomberg Crude Oil [Member]
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ProShares Ultra Bloomberg Natural Gas [Member]
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ProShares Ultra Gold [Member]
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ProShares Ultra Silver [Member]
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ProShares Ultra Australian Dollar [Member]
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ProShares Ultra Euro [Member]
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ProShares Ultra Yen [Member]
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ProShares VIX Short-Term Futures ETF [Member]
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ProShares VIX Mid-Term Futures ETF [Member]
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ProShares Ultra VIX Short-Term Futures ETF [Member]
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ProShares Short VIX Short-Term Futures ETF [Member]
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ProShares Trust II [Member]
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning balance at Dec. 31, 2013 | $ 3,797,427 | $ 256,060,149 | $ 22,734,767 | $ 139,436,456 | $ 112,989,686 | $ 8,896,842 | $ 27,983,279 | $ 418,001,115 | $ 588,121,516 | $ 2,915,034 | $ 142,773,429 | $ 62,915,779 | $ 132,017,405 | $ 465,479,519 | $ 3,168,165 | $ 2,603,827 | $ 2,795,026 | $ 270,398,554 | $ 51,134,323 | $ 226,233,584 | $ 141,751,202 | $ 3,082,207,084 |
| Addition of shares | 414,862,542 | 100,908,495 | 36,818,943 | 54,418,009 | 7,104,479 | 38,562,082 | 29,737,314 | 1,134,916 | 158,474,412 | 18,451,569 | 7,049,141 | 76,672,081 | 99,763,141 | 33,853,464 | 749,779,908 | 247,070,571 | 2,074,661,067 | |||||
| Redemption of shares | (245,343,028) | (63,877,287) | (67,537,697) | (106,367,453) | (1,792,584) | (4,540,263) | (16,410,307) | (223,574,024) | (236,400,780) | (79,246,187) | (25,005,415) | (96,097,669) | (975,650) | (255,813,079) | (33,582,872) | (411,012,456) | (283,151,770) | (2,150,728,521) | ||||
| Net addition (redemption) of shares | 169,519,514 | 37,031,208 | (30,718,754) | (51,949,444) | 5,311,895 | 22,151,775 | (193,836,710) | (77,926,368) | (60,794,618) | (17,956,274) | (19,425,588) | (156,049,938) | 270,592 | 338,767,452 | (36,081,199) | (76,067,454) | ||||||
| Net investment income (loss) | (15,258) | (1,428,630) | (327,867) | (469,062) | (324,337) | (43,854) | (108,740) | (1,849,767) | (1,770,703) | (14,695) | (558,013) | (169,279) | (614,629) | (2,172,510) | (15,473) | (11,443) | (12,488) | (579,835) | (207,195) | (2,503,175) | (1,511,150) | (14,708,103) |
| Net realized gain (loss) | (505,634) | (43,834,692) | (11,181,106) | (8,272,081) | (157,279) | 158,792 | (1,925,051) | (6,292,600) | 177,423 | 376,946 | 31,015,727 | 16,969,039 | 1,945,207 | (32,278,698) | 258,243 | 44,885 | (21,518) | (25,436,108) | (12,062,604) | (250,709,223) | 76,278,010 | (265,452,322) |
| Change in net unrealized appreciation/depreciation | (22,119) | (17,716,756) | 1,425,007 | (16,233,578) | (8,368,370) | (78,252) | (1,281,924) | 8,146,372 | (39,074,311) | (6,083) | 2,638,918 | 2,242,913 | 20,066,415 | 89,399,913 | 181,254 | (70,368) | 211,681 | 10,032,087 | 1,400,878 | (16,527,391) | 799,651 | 37,165,937 |
| Net income (loss) | (543,011) | (62,980,078) | (10,083,966) | (24,974,721) | (8,849,986) | 36,686 | (3,315,715) | 4,005 | (40,667,591) | 356,168 | 33,096,632 | 19,042,673 | 21,396,993 | 54,948,705 | 424,024 | (36,926) | 177,675 | (15,983,856) | (10,868,921) | (269,739,789) | 75,566,511 | (242,994,488) |
| Ending balance at Jun. 30, 2014 | 3,254,416 | 362,599,585 | 49,682,009 | 83,742,981 | 52,190,256 | 14,245,423 | 20,127,301 | 440,156,895 | 353,617,215 | 4,406,118 | 97,943,693 | 21,163,834 | 135,458,124 | 501,002,636 | 3,592,189 | 2,566,901 | 1,997,051 | 98,364,760 | 40,535,994 | 295,261,247 | 181,236,514 | 2,763,145,142 |
| Beginning balance at Mar. 31, 2014 | ||||||||||||||||||||||
| Net investment income (loss) | (7,267) | (829,357) | (172,282) | (218,689) | (133,126) | (27,255) | (49,562) | (948,368) | (820,394) | (7,738) | (224,621) | (51,717) | (297,090) | (1,047,200) | (8,143) | (5,779) | (6,068) | (226,038) | (97,187) | (1,418,872) | (740,111) | (7,336,864) |
| Net realized gain (loss) | 130,061 | (31,561,980) | (1,968,124) | 13,876,111 | 12,455,585 | 225,122 | (1,846,846) | 5,887,503 | 271,807 | (160,396) | 9,815,672 | 162,957 | (21,488,343) | (106,237,339) | 285,670 | (40,251) | (11,077) | (41,222,421) | (6,665,185) | (247,162,005) | 73,543,760 | (341,709,719) |
| Change in net unrealized appreciation/depreciation | (152,108) | (14,323,306) | (2,014,256) | (19,138,156) | (18,329,419) | (159,193) | 857,975 | (1,867,338) | (14,531,898) | 123,032 | 2,162,771 | 440,187 | 25,256,448 | 145,040,452 | (129,874) | 9,649 | 93,703 | (1,589,050) | (1,489,069) | (10,838,017) | 831,898 | 90,254,431 |
| Net income (loss) | (29,314) | (46,714,643) | (4,154,662) | (5,480,734) | (6,006,960) | 38,674 | (1,038,433) | 3,071,797 | (15,080,485) | (45,102) | 11,753,822 | 551,427 | 3,471,015 | 37,755,913 | 147,653 | (36,381) | 76,558 | (43,037,509) | (8,251,441) | (259,418,894) | 73,635,547 | (258,792,152) |
| Ending balance at Jun. 30, 2014 | $ 3,254,416 | $ 362,599,585 | $ 49,682,009 | $ 83,742,981 | $ 52,190,256 | $ 14,245,423 | $ 20,127,301 | $ 440,156,895 | $ 353,617,215 | $ 4,406,118 | $ 97,943,693 | $ 21,163,834 | $ 135,458,124 | $ 501,002,636 | $ 3,592,189 | $ 2,566,901 | $ 1,997,051 | $ 98,364,760 | $ 40,535,994 | $ 295,261,247 | $ 181,236,514 | $ 2,763,145,142 |