v3.26.1
Statements of Operations - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Investment Income        
Interest $ 34,737,195 $ 31,608,406 $ 72,749,424 $ 62,559,311
Dividends from affiliates 14,923,797 0 21,519,338 0
Total income 49,660,992 31,608,406 94,268,762 62,559,311
Expenses        
Management fee 14,232,592 8,240,705 29,915,149 16,091,243
Brokerage commissions 2,136,363 1,988,079 4,325,222 4,152,582
Futures account fees 220,893 222,750 417,823 549,450
Total expenses 16,589,848 10,451,534 34,658,194 20,793,275
Net investment income (loss) 33,071,144 21,156,872 59,610,568 41,766,036
Net realized gain (loss) on        
Net realized gain (loss) (1,095,488,840) 406,051,436 (90,749,924) 653,081,996
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (139,515,325) (256,039,064) (692,782,517) (96,121,534)
Net realized and unrealized gain (loss) (1,235,004,165) 150,012,372 (783,532,441) 556,960,462
Net income (loss) (1,201,933,021) 171,169,244 (723,921,873) 598,726,498
Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (777,247,902) 328,054,378 (222,976,007) 513,310,950
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 188,057,704 (165,477,989) (140,194,370) (104,237,226)
Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (6,469) (9,131) 5,082 (9,201)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (39,447) 13,008 (494,672) (125,625)
Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 636,039 0 949,535 0
Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (318,604,869) 81,036,670 132,409,662 142,797,216
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (328,285,016) (91,024,244) (553,662,898) 8,077,709
Affiliated Investments [Member]        
Investment Income        
Dividends from affiliates 14,923,797   21,519,338  
Net realized gain (loss) on        
Net realized gain (loss) (62,770) 0 186,180 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 57,360 0 170,980 0
Foreign Currency Forward Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (202,869) (3,030,481) (1,324,376) (3,016,969)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 694,074 450,161 1,398,443 163,608
ProShares Short VIX Short-Term Futures ETF [Member]        
Investment Income        
Interest 1,082,679 3,664,726 2,304,724 5,820,643
Dividends from affiliates 583,084 0 790,653 0
Total income 1,665,763 3,664,726 3,095,377 5,820,643
Expenses        
Management fee 541,259 973,113 1,031,026 1,528,502
Brokerage commissions 99,757 205,533 199,725 332,745
Futures account fees 16,359 27,459 30,217 53,156
Total expenses 657,375 1,206,105 1,260,968 1,914,403
Net investment income (loss) 1,008,388 2,458,621 1,834,409 3,906,240
Net realized gain (loss) on        
Net realized gain (loss) 32,421,061 2,460 13,730,650 (17,634,393)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 15,210,500 13,637,223 (3,781,548) 13,394,285
Net realized and unrealized gain (loss) 47,631,561 13,639,683 9,949,102 (4,240,108)
Net income (loss) 48,639,949 16,098,304 11,783,511 (333,868)
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 32,396,869 2,005 13,691,256 (17,634,848)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 15,231,904 13,636,368 (3,768,368) 13,401,093
ProShares Short VIX Short-Term Futures ETF [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 455 0 455
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,904) 855 (11,680) (6,808)
ProShares Short VIX Short-Term Futures ETF [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 24,192 0 34,394 0
ProShares Short VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 0 5,000 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (19,500) 0 (1,500) 0
ProShares Ultra Bloomberg Crude Oil [Member]        
Investment Income        
Interest 2,632,705 3,240,612 4,551,207 6,745,716
Dividends from affiliates 1,114,675 0 1,803,495 0
Total income 3,747,380 3,240,612 6,354,702 6,745,716
Expenses        
Management fee 1,016,255 951,694 2,134,963 1,916,607
Brokerage commissions 56,298 61,348 166,497 107,916
Total expenses 1,072,553 1,013,042 2,301,460 2,024,523
Net investment income (loss) 2,674,827 2,227,570 4,053,242 4,721,193
Net realized gain (loss) on        
Net realized gain (loss) 145,524,039 (28,591,884) 368,528,515 (13,075,023)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (187,941,169) (41,335,786) (64,126,188) (41,800,136)
Net realized and unrealized gain (loss) (42,417,130) (69,927,670) 304,402,327 (54,875,159)
Net income (loss) (39,742,303) (67,700,100) 308,455,569 (50,153,966)
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 68,072,675 (14,353,923) 108,222,340 (3,195,195)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (74,612,147) (8,595,750) 43,180 (7,581,547)
ProShares Ultra Bloomberg Crude Oil [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 322 0 322
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (8,360) 2,253 (35,789) (26,602)
ProShares Ultra Bloomberg Crude Oil [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 48,424 0 77,510 0
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 77,435,368 (14,238,283) 260,277,893 (9,880,150)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (113,381,322) (32,742,289) (64,154,579) (34,191,987)
ProShares Ultra Bloomberg Crude Oil [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (32,428) 0 (49,228) 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 60,660 0 21,000 0
ProShares Ultra Bloomberg Natural Gas [Member]        
Investment Income        
Interest 2,019,001 2,079,577 4,792,683 4,980,630
Dividends from affiliates 1,044,838 0 1,478,171 0
Total income 3,063,839 2,079,577 6,270,854 4,980,630
Expenses        
Management fee 948,756 548,526 1,992,507 1,251,579
Brokerage commissions 439,496 288,858 852,057 571,013
Futures account fees 31,025 18,071 78,240 116,609
Total expenses 1,419,277 855,455 2,922,804 1,939,201
Net investment income (loss) 1,644,562 1,224,122 3,348,050 3,041,429
Net realized gain (loss) on        
Net realized gain (loss) (57,377,925) (12,342,333) 15,028,178 210,262,895
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 31,159,508 (84,894,992) 136,933,487 (127,033,885)
Net realized and unrealized gain (loss) (26,218,417) (97,237,325) 151,961,665 83,229,010
Net income (loss) (24,573,855) (96,013,203) 155,309,715 86,270,439
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (57,395,045) (12,342,109) 14,982,770 210,263,119
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 31,126,328 (84,894,683) 136,975,690 (127,006,905)
ProShares Ultra Bloomberg Natural Gas [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 22 (224) 9,550 (224)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (6,820) (309) (62,703) (26,980)
ProShares Ultra Bloomberg Natural Gas [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 44,515 0 63,275 0
ProShares Ultra Bloomberg Natural Gas [Member] | Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (5) 0 (5) 0
ProShares Ultra Bloomberg Natural Gas [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (27,412) 0 (27,412) 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 40,000 0 20,500 0
ProShares Ultra Euro [Member]        
Investment Income        
Interest 47,346 68,572 94,187 114,044
Total income 47,346 68,572 94,187 114,044
Expenses        
Management fee 13,061 18,079 27,870 29,891
Total expenses 13,061 18,079 27,870 29,891
Net investment income (loss) 34,285 50,493 66,317 84,153
Net realized gain (loss) on        
Net realized gain (loss) (45,142) 616,633 (224,784) 777,150
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (78,046) 415,771 (188,584) 610,648
Net realized and unrealized gain (loss) (123,188) 1,032,404 (413,368) 1,387,798
Net income (loss) (88,903) 1,082,897 (347,051) 1,471,951
ProShares Ultra Euro [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (54) 0 (54) 0
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (45,142) 616,633 (224,784) 777,150
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (77,992) 415,771 (188,530) 610,648
ProShares Ultra Gold [Member]        
Investment Income        
Interest 5,227,533 5,119,975 13,317,296 8,858,522
Dividends from affiliates 2,546,130 0 3,978,367 0
Total income 7,773,663 5,119,975 17,295,663 8,858,522
Expenses        
Management fee 2,080,734 1,197,578 5,010,657 2,061,122
Brokerage commissions 22,489 26,535 76,645 45,879
Total expenses 2,103,223 1,224,113 5,087,302 2,107,001
Net investment income (loss) 5,670,440 3,895,862 12,208,361 6,751,521
Net realized gain (loss) on        
Net realized gain (loss) (236,731,105) 86,158,116 (7,878,443) 144,586,702
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (6,380,474) (61,454,302) (142,007,741) (5,429,584)
Net realized and unrealized gain (loss) (243,111,579) 24,703,814 (149,886,184) 139,157,118
Net income (loss) (237,441,139) 28,599,676 (137,677,823) 145,908,639
ProShares Ultra Gold [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (124,752,536) 42,515,493 20,220,213 71,847,565
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 34,892,725 (33,165,219) (80,380,812) (3,032,218)
ProShares Ultra Gold [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 77 0 77
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (16,408) 2,408 (121,985) (19,478)
ProShares Ultra Gold [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 108,616 0 180,238 0
ProShares Ultra Gold [Member] | Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (112,125,387) 43,642,546 (28,403,646) 72,739,060
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (41,208,791) (28,291,491) (61,558,944) (2,377,888)
ProShares Ultra Gold [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 38,202 0 124,752 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (48,000) 0 54,000 0
ProShares Ultra Silver [Member]        
Investment Income        
Interest 11,530,778 6,095,350 26,100,001 12,115,255
Dividends from affiliates 4,043,046 0 5,973,753 0
Total income 15,573,824 6,095,350 32,073,754 12,115,255
Expenses        
Management fee 4,220,154 1,485,223 10,454,233 3,001,678
Brokerage commissions 77,234 58,272 184,682 104,828
Total expenses 4,297,388 1,543,495 10,638,915 3,106,506
Net investment income (loss) 11,276,436 4,551,855 21,434,839 9,008,749
Net realized gain (loss) on        
Net realized gain (loss) (612,192,543) 99,198,831 (252,637,503) 153,909,618
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (198,181,181) (73,497,185) (917,573,769) 65,780,286
Net realized and unrealized gain (loss) (810,373,724) 25,701,646 (1,170,211,272) 219,689,904
Net income (loss) (799,097,288) 30,253,501 (1,148,776,433) 228,698,653
ProShares Ultra Silver [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (298,925,767) 45,180,695 (125,830,415) 68,353,031
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (19,713,708) (39,005,923) (474,355,017) 19,765,588
ProShares Ultra Silver [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (6,976) (12) (6,721) (12)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (174) 4,316 (193,843) (32,836)
ProShares Ultra Silver [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 173,106 0 271,591 0
ProShares Ultra Silver [Member] | Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (313,469,955) 54,018,148 (127,236,007) 85,556,599
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (178,429,799) (34,495,578) (443,108,909) 46,047,534
ProShares Ultra Silver [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 37,049 0 164,049 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (37,500) 0 84,000 0
ProShares Ultra VIX Short-Term Futures ETF [Member]        
Investment Income        
Interest 1,737,367 2,804,863 3,712,951 5,692,389
Dividends from affiliates 760,092 0 1,098,093 0
Total income 2,497,459 2,804,863 4,811,044 5,692,389
Expenses        
Management fee 919,269 906,425 1,772,627 1,742,735
Brokerage commissions 644,706 621,171 1,283,038 1,508,883
Futures account fees 109,212 126,256 178,377 213,163
Total expenses 1,673,187 1,653,852 3,234,042 3,464,781
Net investment income (loss) 824,272 1,151,011 1,577,002 2,227,608
Net realized gain (loss) on        
Net realized gain (loss) (192,467,810) 56,043,330 (116,442,087) 155,964,717
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (56,863,823) (88,992,737) 23,175,576 (69,359,376)
Net realized and unrealized gain (loss) (249,331,633) (32,949,407) (93,266,511) 86,605,341
Net income (loss) (248,507,361) (31,798,396) (91,689,509) 88,832,949
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (192,491,371) 56,045,179 (116,494,011) 155,966,636
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (56,859,023) (88,993,838) 23,187,545 (69,352,758)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 (1,849) 52 (1,919)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 0 1,101 (21,969) (6,618)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 32,338 0 48,649 0
ProShares Ultra VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (8,777) 0 3,223 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (4,800) 0 10,000 0
ProShares Ultra Yen [Member]        
Investment Income        
Interest 219,316 580,313 519,892 1,108,434
Dividends from affiliates 120,938 0 174,435 0
Total income 340,254 580,313 694,327 1,108,434
Expenses        
Management fee 91,093 153,765 203,396 290,779
Total expenses 91,093 153,765 203,396 290,779
Net investment income (loss) 249,161 426,548 490,931 817,655
Net realized gain (loss) on        
Net realized gain (loss) (1,505,101) 1,428,203 (4,423,294) 3,070,845
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (699,201) 2,283,730 234,335 4,951,669
Net realized and unrealized gain (loss) (2,204,302) 3,711,933 (4,188,959) 8,022,514
Net income (loss) (1,955,141) 4,138,481 (3,698,028) 8,840,169
ProShares Ultra Yen [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (67) 0 (188) 0
ProShares Ultra Yen [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 5,147 0 7,714 0
ProShares Ultra Yen [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 1,897 0 1,897 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (2,600) 0 2,200 0
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (1,512,145) 1,428,203 (4,432,905) 3,070,845
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (696,534) 2,283,730 232,323 4,951,669
ProShares UltraShort Bloomberg Crude Oil [Member]        
Investment Income        
Interest 6,034,097 1,176,354 7,365,892 3,111,177
Dividends from affiliates 3,019,466 0 3,700,898 0
Total income 9,053,563 1,176,354 11,066,790 3,111,177
Expenses        
Management fee 2,707,032 294,244 3,345,203 775,568
Brokerage commissions 444,442 62,422 563,868 123,198
Total expenses 3,151,474 356,666 3,909,071 898,766
Net investment income (loss) 5,902,089 819,688 7,157,719 2,212,411
Net realized gain (loss) on        
Net realized gain (loss) (233,392,515) 32,209,630 (330,228,695) 41,143,529
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 329,969,647 14,026,830 272,945,806 17,511,380
Net realized and unrealized gain (loss) 96,577,132 46,236,460 (57,282,889) 58,654,909
Net income (loss) 102,479,221 47,056,148 (50,125,170) 60,867,320
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (233,450,154) 32,210,113 (330,310,811) 41,144,012
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 329,873,520 14,026,553 273,002,005 17,511,380
ProShares UltraShort Bloomberg Crude Oil [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 413 (483) 411 (483)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,873) 277 (10,779) 0
ProShares UltraShort Bloomberg Crude Oil [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 128,775 0 153,254 0
ProShares UltraShort Bloomberg Crude Oil [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (71,549) 0 (71,549) 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 98,000 0 (45,420) 0
ProShares UltraShort Bloomberg Natural Gas [Member]        
Investment Income        
Interest 811,304 3,919,799 2,624,020 8,363,249
Dividends from affiliates 443,285 0 744,332 0
Total income 1,254,589 3,919,799 3,368,352 8,363,249
Expenses        
Management fee 383,335 972,550 1,100,457 2,059,769
Brokerage commissions 216,918 525,062 732,352 1,029,562
Futures account fees 9,242 26,697 37,707 72,737
Total expenses 609,495 1,524,309 1,870,516 3,162,068
Net investment income (loss) 645,094 2,395,490 1,497,836 5,201,181
Net realized gain (loss) on        
Net realized gain (loss) 69,531,049 124,592,646 249,415,454 (97,235,066)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (41,475,060) 80,955,495 (53,365,642) 66,357,458
Net realized and unrealized gain (loss) 28,055,989 205,548,141 196,049,812 (30,877,608)
Net income (loss) 28,701,083 207,943,631 197,547,648 (25,676,427)
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 69,502,325 124,600,984 249,344,756 (97,226,728)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (41,472,530) 80,953,188 (53,365,916) 66,356,953
ProShares UltraShort Bloomberg Natural Gas [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 (8,338) 1,718 (8,338)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (30) 2,307 (13,226) 505
ProShares UltraShort Bloomberg Natural Gas [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 18,946 0 34,702 0
ProShares UltraShort Bloomberg Natural Gas [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 9,778 0 34,278 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (2,500) 0 13,500 0
ProShares UltraShort Euro [Member]        
Investment Income        
Interest 241,908 303,400 462,021 651,455
Dividends from affiliates 88,387 0 121,823 0
Total income 330,295 303,400 583,844 651,455
Expenses        
Management fee 88,784 79,062 170,057 169,010
Total expenses 88,784 79,062 170,057 169,010
Net investment income (loss) 241,511 224,338 413,787 482,445
Net realized gain (loss) on        
Net realized gain (loss) 276,107 (3,936,874) 888,993 (5,567,827)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 686,886 (1,538,631) 1,292,682 (2,883,349)
Net realized and unrealized gain (loss) 962,993 (5,475,505) 2,181,675 (8,451,176)
Net income (loss) 1,204,504 (5,251,167) 2,595,462 (7,968,731)
ProShares UltraShort Euro [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 119 0 119
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (187) 0 (268) 0
ProShares UltraShort Euro [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 3,744 0 5,348 0
ProShares UltraShort Euro [Member] | Affiliated Investments [Member]        
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,000) 0 2,000 0
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 272,363 (3,936,993) 883,645 (5,567,946)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 688,073 (1,538,631) 1,290,950 (2,883,349)
ProShares UltraShort Gold [Member]        
Investment Income        
Interest 689,377 712,768 1,259,553 925,475
Dividends from affiliates 237,897 0 321,487 0
Total income 927,274 712,768 1,581,040 925,475
Expenses        
Management fee 256,484 198,669 480,471 256,449
Brokerage commissions 4,828 9,743 11,873 11,822
Total expenses 261,312 208,412 492,344 268,271
Net investment income (loss) 665,962 504,356 1,088,696 657,204
Net realized gain (loss) on        
Net realized gain (loss) 18,754,588 5,846,099 3,721,435 2,403,495
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 8,062,621 5,933,528 21,345,466 1,607,812
Net realized and unrealized gain (loss) 26,817,209 11,779,627 25,066,901 4,011,307
Net income (loss) 27,483,171 12,283,983 26,155,597 4,668,511
ProShares UltraShort Gold [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 9,904,179 5,683,372 4,210,330 4,105,748
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 4,902,721 3,028,045 15,854,449 341,396
ProShares UltraShort Gold [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,747) 0 (1,990) 0
ProShares UltraShort Gold [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 9,895 0 14,029 0
ProShares UltraShort Gold [Member] | Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 8,843,720 162,727 (501,468) (1,702,253)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 3,162,647 2,905,483 5,486,507 1,266,416
ProShares UltraShort Gold [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (3,206) 0 (1,456) 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,000) 0 6,500 0
ProShares UltraShort Silver [Member]        
Investment Income        
Interest 913,905 227,082 2,165,937 404,937
Dividends from affiliates 195,906 0 270,134 0
Total income 1,109,811 227,082 2,436,071 404,937
Expenses        
Management fee 312,255 72,877 866,999 134,248
Brokerage commissions 14,344 5,790 42,246 10,119
Total expenses 326,599 78,667 909,245 144,367
Net investment income (loss) 783,212 148,415 1,526,826 260,570
Net realized gain (loss) on        
Net realized gain (loss) 38,498,831 (3,327,232) 733,506 (6,436,218)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 5,539,198 2,491,447 29,367,087 (2,560,601)
Net realized and unrealized gain (loss) 44,038,029 (835,785) 30,100,593 (8,996,819)
Net income (loss) 44,821,241 (687,370) 31,627,419 (8,736,249)
ProShares UltraShort Silver [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 17,783,840 (778,764) (27,551,545) (2,520,178)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 3,969,823 891,816 19,694,661 105,765
ProShares UltraShort Silver [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 67 0 67 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,424) 0 1,349 0
ProShares UltraShort Silver [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 8,196 0 12,301 0
ProShares UltraShort Silver [Member] | Swap Agreements [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 20,711,390 (2,548,468) 28,272,895 (3,916,040)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 1,572,249 1,599,631 9,673,027 (2,666,366)
ProShares UltraShort Silver [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (4,662) 0 (212) 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (1,450) 0 (1,950) 0
ProShares UltraShort Yen [Member]        
Investment Income        
Interest 204,564 208,788 415,903 417,761
Dividends from affiliates 61,871 0 85,276 0
Total income 266,435 208,788 501,179 417,761
Expenses        
Management fee 72,367 53,166 146,367 107,103
Total expenses 72,367 53,166 146,367 107,103
Net investment income (loss) 194,068 155,622 354,812 310,658
Net realized gain (loss) on        
Net realized gain (loss) 1,084,676 (1,138,233) 2,453,412 (1,296,927)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 779,640 (710,709) 64,832 (2,515,360)
Net realized and unrealized gain (loss) 1,864,316 (1,848,942) 2,518,244 (3,812,287)
Net income (loss) 2,058,384 (1,693,320) 2,873,056 (3,501,629)
ProShares UltraShort Yen [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 91 0 91
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (187) 0 (268) 0
ProShares UltraShort Yen [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 2,621 0 3,744 0
ProShares UltraShort Yen [Member] | Affiliated Investments [Member]        
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (700) 0 1,400 0
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 1,082,055 (1,138,324) 2,449,668 (1,297,018)
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) 780,527 (710,709) 63,700 (2,515,360)
ProShares VIX Mid-Term Futures ETF [Member]        
Investment Income        
Interest 263,794 216,994 656,606 498,093
Dividends from affiliates 152,911 0 219,783 0
Total income 416,705 216,994 876,389 498,093
Expenses        
Management fee 111,544 49,547 241,608 113,521
Brokerage commissions 7,648 5,909 22,594 18,454
Futures account fees 5,496 2,004 9,523 5,124
Total expenses 124,688 57,460 273,725 137,099
Net investment income (loss) 292,017 159,534 602,664 360,994
Net realized gain (loss) on        
Net realized gain (loss) (1,140,314) 4,727,074 (587,399) 5,434,266
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (9,099,123) (1,835,417) (1,563,390) (210,933)
Net realized and unrealized gain (loss) (10,239,437) 2,891,657 (2,150,789) 5,223,333
Net income (loss) (9,947,420) 3,051,191 (1,548,125) 5,584,327
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (1,150,253) 4,726,990 (600,547) 5,434,182
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (9,095,985) (1,835,417) (1,566,090) (210,933)
ProShares VIX Mid-Term Futures ETF [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 0 84 0 84
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (138) 0 (300) 0
ProShares VIX Mid-Term Futures ETF [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 6,542 0 9,751 0
ProShares VIX Mid-Term Futures ETF [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 3,397 0 3,397 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (3,000) 0 3,000 0
ProShares VIX Short-Term Futures ETF [Member]        
Investment Income        
Interest 1,081,522 1,189,233 2,406,551 2,751,531
Dividends from affiliates 511,271 0 758,638 0
Total income 1,592,793 1,189,233 3,165,189 2,751,531
Expenses        
Management fee 470,210 286,187 936,708 652,682
Brokerage commissions 108,204 117,436 189,645 288,163
Futures account fees 49,559 22,263 83,759 88,661
Total expenses 627,973 425,886 1,210,112 1,029,506
Net investment income (loss) 964,820 763,347 1,955,077 1,722,025
Net realized gain (loss) on        
Net realized gain (loss) (66,726,736) 44,564,970 (32,827,862) 76,774,233
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (30,205,248) (21,523,329) 4,465,074 (14,541,848)
Net realized and unrealized gain (loss) (96,931,984) 23,041,641 (28,362,788) 62,232,385
Net income (loss) (95,967,164) 23,804,988 (26,407,711) 63,954,410
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (66,742,664) 44,564,343 (32,860,343) 76,773,606
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (30,185,924) (21,523,129) 4,484,303 (14,535,040)
ProShares VIX Short-Term Futures ETF [Member] | Short-term U.S. Government and Agency Obligations [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 5 627 5 627
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) (74) (200) (20,979) (6,808)
ProShares VIX Short-Term Futures ETF [Member] | Payment from affiliate [Member]        
Net realized gain (loss) on        
Net realized gain (loss) 20,982 0 33,035 0
ProShares VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member]        
Net realized gain (loss) on        
Net realized gain (loss) (5,059) 0 (559) 0
Change in net unrealized appreciation (depreciation) on        
Change in net unrealized appreciation (depreciation) $ (19,250) $ 0 $ 1,750 $ 0