v3.24.0.1
Statements of Operations - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Investment Income      
Interest $ 136,369,286 $ 44,947,305 [1] $ 1,551,527
Expenses      
Management fee 35,112,338 43,228,350 [1] 42,560,986
Brokerage commissions 8,606,195 7,805,056 [1] 8,889,232
Futures account fees 1,467,200 3,926,728 [1] 7,549,345
Non-recurring fees and expenses 0 176,724 [1] 27,975
Total expenses 45,185,733 55,136,858 [1] 59,027,538
Net investment income (loss) 91,183,553 (10,189,553) [1] (57,476,011)
Net realized gain (loss) on      
Net realized gain (loss) (2,716,520,875) 321,313,828 [1] (1,555,465,807)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 143,926,302 (215,342,862) [1] (71,022,065)
Net realized and unrealized gain (loss) (2,572,594,573) 105,970,966 [1] (1,626,487,872)
Net income (loss) (2,481,411,020) 95,781,413 [1] (1,683,963,883)
Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (2,752,823,603) 91,781,637 [1] (1,548,344,771)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 241,673,235 (218,950,927) [1] (106,029,049)
Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 38,451,228 216,079,482 [1] (17,091,298)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (100,372,363) 7,797,463 [1] 33,122,467
U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (159,628) (264,402) [1] 529,886
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (128,584) 550,165 [1] (312,409)
Foreign Currency Forward Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (1,988,872) 13,717,111 [1] 9,440,376
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 2,754,014 (4,739,563) [1] 2,196,926
ProShares Short VIX Short-Term Futures ETF [Member]      
Investment Income      
Interest 10,251,068 3,512,477 101,467
Expenses      
Management fee 2,500,560 3,901,784 4,358,107
Brokerage commissions 543,461 663,288 848,956
Futures account fees 0 381,085 1,036,798
Non-recurring fees and expenses 0 16,339 0
Total expenses 3,044,021 4,962,496 6,243,861
Net investment income (loss) 7,207,047 (1,450,019) (6,142,394)
Net realized gain (loss) on      
Net realized gain (loss) 160,494,706 21,368,088 194,998,324
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 1,542,809 (20,123,277) 22,890,058
Net realized and unrealized gain (loss) 162,037,515 1,244,811 217,888,382
Net income (loss) 169,244,562 (205,208) 211,745,988
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 160,516,553 21,454,600 194,879,700
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 1,548,243 (20,182,897) 22,926,495
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (21,847) (86,512) 118,624
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (5,434) 59,620 (36,437)
ProShares Ultra Bloomberg Crude Oil [Member]      
Investment Income      
Interest 22,579,489 8,777,690 488,829
Expenses      
Management fee 6,801,744 10,254,003 10,774,039
Brokerage commissions 317,243 512,547 871,807
Futures account fees 0 400,349 798,214
Non-recurring fees and expenses 0 32,416 27,975
Total expenses 7,118,987 11,199,315 12,472,035
Net investment income (loss) 15,460,502 (2,421,625) (11,983,206)
Net realized gain (loss) on      
Net realized gain (loss) 100,808,721 728,828,780 952,826,131
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (86,020,999) (110,838,459) 48,532,601
Net realized and unrealized gain (loss) 14,787,722 617,990,321 1,001,358,732
Net income (loss) 30,248,224 615,568,696 989,375,526
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 62,486,794 466,568,654 696,172,213
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (29,806,948) (121,163,809) 2,891,486
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 38,380,744 262,267,915 256,577,496
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (56,204,642) 10,231,284 45,686,098
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (58,817) (7,789) 76,422
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (9,409) 94,066 (44,983)
ProShares Ultra Bloomberg Natural Gas [Member]      
Investment Income      
Interest 34,926,670 4,362,018 50,091
Expenses      
Management fee 9,157,296 2,676,608 1,031,508
Brokerage commissions 3,527,713 626,331 352,618
Futures account fees 662,807 278,411 275,824
Non-recurring fees and expenses 0 15,397 0
Total expenses 13,347,816 3,596,747 1,659,950
Net investment income (loss) 21,578,854 765,271 (1,609,859)
Net realized gain (loss) on      
Net realized gain (loss) (2,080,655,811) 109,675,787 (51,850,483)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 354,183,787 (302,342,668) (14,721,467)
Net realized and unrealized gain (loss) (1,726,472,024) (192,666,881) (66,571,950)
Net income (loss) (1,704,893,170) (191,901,610) (68,181,809)
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (2,054,254,551) 109,680,104 (51,858,807)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 354,221,039 (302,407,808) (14,706,882)
ProShares Ultra Bloomberg Natural Gas [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (26,402,152) 0 0
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 892 (4,317) 8,324
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (37,252) 65,140 (14,585)
ProShares Ultra Euro [Member]      
Investment Income      
Interest 343,876 149,251 1,922
Expenses      
Management fee 77,062 100,481 37,450
Non-recurring fees and expenses 0 588 0
Total expenses 77,062 101,069 37,450
Net investment income (loss) 266,814 48,182 (35,528)
Net realized gain (loss) on      
Net realized gain (loss) 293,493 (959,302) (498,935)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (108,707) 333,456 (6,536)
Net realized and unrealized gain (loss) 184,786 (625,846) (505,471)
Net income (loss) 451,600 (577,664) (540,999)
ProShares Ultra Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 (5,949) 1,250
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 0 452 (452)
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 293,493 (953,353) (500,185)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (108,707) 333,004 (6,084)
ProShares Ultra Gold [Member]      
Investment Income      
Interest 7,285,355 2,321,780 92,581
Expenses      
Management fee 1,735,128 2,259,459 2,262,422
Brokerage commissions 26,654 49,272 41,241
Futures account fees 0 28,169 77,793
Non-recurring fees and expenses 0 6,758 0
Total expenses 1,761,782 2,343,658 2,381,456
Net investment income (loss) 5,523,573 (21,878) (2,288,875)
Net realized gain (loss) on      
Net realized gain (loss) 21,400,830 (32,910,658) (31,323,946)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (2,575,471) 475,522 1,497,196
Net realized and unrealized gain (loss) 18,825,359 (32,435,136) (29,826,750)
Net income (loss) 24,348,932 (32,457,014) (32,115,625)
ProShares Ultra Gold [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 849,905 (23,226,760) (12,433,003)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 854,187 2,587,194 (1,991,980)
ProShares Ultra Gold [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 20,579,249 (9,683,190) (18,911,561)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (3,417,873) (2,142,722) 3,498,208
ProShares Ultra Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (28,324) (708) 20,618
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (11,785) 31,050 (9,032)
ProShares Ultra Silver [Member]      
Investment Income      
Interest 13,905,665 3,844,119 261,655
Expenses      
Management fee 3,644,422 4,008,030 5,912,386
Brokerage commissions 130,997 135,647 145,545
Futures account fees 0 26,693 296,749
Non-recurring fees and expenses 0 14,619 0
Total expenses 3,775,419 4,184,989 6,354,680
Net investment income (loss) 10,130,246 (340,870) (6,093,025)
Net realized gain (loss) on      
Net realized gain (loss) 7,175,146 (68,909,709) (172,447,879)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (59,096,598) 25,616,009 (50,874,626)
Net realized and unrealized gain (loss) (51,921,452) (43,293,700) (223,322,505)
Net income (loss) (41,791,206) (43,634,570) (229,415,530)
ProShares Ultra Silver [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (223,436) (11,586,506) (37,880,546)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (17,025,826) 26,920,029 (34,683,667)
ProShares Ultra Silver [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 7,445,439 (57,315,486) (134,594,684)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (42,051,433) (1,367,487) (16,160,967)
ProShares Ultra Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (46,857) (7,717) 27,351
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (19,339) 63,467 (29,992)
ProShares Ultra VIX Short-Term Futures ETF [Member]      
Investment Income      
Interest 15,951,926 8,744,418 249,487
Expenses      
Management fee 4,392,607 8,937,342 11,128,589
Brokerage commissions 2,596,882 3,993,956 5,427,481
Futures account fees 476,293 1,749,320 3,850,402
Non-recurring fees and expenses 0 37,189 0
Total expenses 7,465,782 14,717,807 20,406,472
Net investment income (loss) 8,486,144 (5,973,389) (20,156,985)
Net realized gain (loss) on      
Net realized gain (loss) (940,103,052) (151,299,433) (1,983,414,849)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 5,368,159 90,347,140 (78,354,915)
Net realized and unrealized gain (loss) (934,734,893) (60,952,293) (2,061,769,764)
Net income (loss) (926,248,749) (66,925,682) (2,081,926,749)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (940,116,773) (173,487,606) (1,860,561,641)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 5,371,542 89,801,304 (77,832,091)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 22,556,586 (122,952,954)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 0 477,437 (452,630)
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 13,721 (368,413) 99,746
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (3,383) 68,399 (70,194)
ProShares Ultra Yen [Member]      
Investment Income      
Interest 667,026 120,631 1,187
Expenses      
Management fee 145,536 65,070 24,974
Non-recurring fees and expenses 0 508 0
Total expenses 145,536 65,578 24,974
Net investment income (loss) 521,490 55,053 (23,787)
Net realized gain (loss) on      
Net realized gain (loss) (2,637,502) (1,140,278) (442,664)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 534,736 1,077,661 (160,199)
Net realized and unrealized gain (loss) (2,102,766) (62,617) (602,863)
Net income (loss) (1,581,276) (7,564) (626,650)
ProShares Ultra Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 1,548 103
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (2,637,502) (1,141,826) (442,767)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 534,736 1,077,661 (160,199)
ProShares UltraShort Bloomberg Crude Oil [Member]      
Investment Income      
Interest 8,581,404 4,116,166 51,207
Expenses      
Management fee 1,871,453 3,324,952 847,440
Brokerage commissions 242,865 427,485 139,273
Futures account fees 0 214,920 103,661
Non-recurring fees and expenses 0 14,792 0
Total expenses 2,114,318 3,982,149 1,090,374
Net investment income (loss) 6,467,086 134,017 (1,039,167)
Net realized gain (loss) on      
Net realized gain (loss) 12,367,670 (108,954,702) (105,294,702)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 12,181,761 18,690,259 6,211,074
Net realized and unrealized gain (loss) 24,549,431 (90,264,443) (99,083,628)
Net income (loss) 31,016,517 (90,130,426) (100,122,795)
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 12,379,340 (108,954,702) (105,340,654)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 12,191,426 18,654,355 6,227,351
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (11,670) 0 45,952
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (9,665) 35,904 (16,277)
ProShares UltraShort Bloomberg Natural Gas [Member]      
Investment Income      
Interest 5,542,278 2,635,445 44,855
Expenses      
Management fee 1,226,758 2,255,264 1,104,237
Brokerage commissions 817,632 713,500 495,800
Futures account fees 104,966 283,983 212,771
Non-recurring fees and expenses 0 10,264 0
Total expenses 2,149,356 3,263,011 1,812,808
Net investment income (loss) 3,392,922 (627,566) (1,767,953)
Net realized gain (loss) on      
Net realized gain (loss) 306,795,581 (165,453,289) 9,183,902
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (89,455,705) 72,499,952 13,022,687
Net realized and unrealized gain (loss) 217,339,876 (92,953,337) 22,206,589
Net income (loss) 220,732,798 (93,580,903) 20,438,636
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 306,791,742 (165,347,108) 9,180,867
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (89,442,905) 72,453,147 13,056,941
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 3,839 (106,181) 3,035
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (12,800) 46,805 (34,254)
ProShares UltraShort Euro [Member]      
Investment Income      
Interest 2,251,539 906,928 24,790
Expenses      
Management fee 505,085 676,052 480,737
Non-recurring fees and expenses 0 3,838 0
Total expenses 505,085 679,890 480,737
Net investment income (loss) 1,746,454 227,038 (455,947)
Net realized gain (loss) on      
Net realized gain (loss) (2,624,737) 7,003,039 6,311,782
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 607,675 (2,241,250) 921,251
Net realized and unrealized gain (loss) (2,017,062) 4,761,789 7,233,033
Net income (loss) (270,608) 4,988,827 6,777,086
ProShares UltraShort Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 210,974 31,420
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (4,802) 11,965 (7,412)
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (2,624,737) 6,792,065 6,280,362
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 612,477 (2,253,215) 928,663
ProShares UltraShort Gold [Member]      
Investment Income      
Interest 582,222 215,724 13,048
Expenses      
Management fee 140,787 266,018 271,758
Brokerage commissions 4,880 10,874 11,667
Futures account fees 0 2,446 10,223
Non-recurring fees and expenses 0 1,075 0
Total expenses 145,667 280,413 293,648
Net investment income (loss) 436,555 (64,689) (280,600)
Net realized gain (loss) on      
Net realized gain (loss) (2,180,686) 2,576,565 (2,448,551)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 347,791 146,776 (372,961)
Net realized and unrealized gain (loss) (1,832,895) 2,723,341 (2,821,512)
Net income (loss) (1,396,340) 2,658,652 (3,102,112)
ProShares UltraShort Gold [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (201,345) 1,858,730 (2,690,736)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (45,345) (256,965) 355,009
ProShares UltraShort Gold [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (1,979,341) 717,831 235,790
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 393,136 400,160 (724,389)
ProShares UltraShort Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 4 6,395
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 0 3,581 (3,581)
ProShares UltraShort Silver [Member]      
Investment Income      
Interest 1,118,150 215,031 12,422
Expenses      
Management fee 287,739 246,718 330,111
Brokerage commissions 39,452 26,948 26,469
Futures account fees 0 4,443 25,766
Non-recurring fees and expenses 0 1,106 0
Total expenses 327,191 279,215 382,346
Net investment income (loss) 790,959 (64,184) (369,924)
Net realized gain (loss) on      
Net realized gain (loss) 13,437,583 (1,670,159) (17,795)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 3,537,995 (1,393,342) 2,147,856
Net realized and unrealized gain (loss) 16,975,578 (3,063,501) 2,130,061
Net income (loss) 17,766,537 (3,127,685) 1,760,137
ProShares UltraShort Silver [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 13,011,200 796,029 (2,577,082)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 2,629,546 (1,592,993) 872,569
ProShares UltraShort Silver [Member] | Swap Agreements [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 427,289 (2,464,174) 2,554,615
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 908,449 198,791 1,276,147
ProShares UltraShort Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (906) (2,014) 4,672
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 0 860 (860)
ProShares UltraShort Yen [Member]      
Investment Income      
Interest 1,052,461 496,989 12,708
Expenses      
Management fee 233,492 372,853 260,096
Non-recurring fees and expenses 0 2,140 0
Total expenses 233,492 374,993 260,096
Net investment income (loss) 818,969 121,996 (247,388)
Net realized gain (loss) on      
Net realized gain (loss) 2,979,874 9,123,513 4,126,928
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 1,712,747 (3,892,009) 1,432,303
Net realized and unrealized gain (loss) 4,692,621 5,231,504 5,559,231
Net income (loss) 5,511,590 5,353,500 5,311,843
ProShares UltraShort Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 103,288 23,962
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (2,761) 5,004 (2,243)
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 2,979,874 9,020,225 4,102,966
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 1,715,508 (3,897,013) 1,434,546
ProShares VIX Mid-Term Futures ETF [Member]      
Investment Income      
Interest 2,412,485 860,134 41,362
Expenses      
Management fee 499,363 809,060 858,979
Brokerage commissions 40,128 73,842 66,076
Futures account fees 40,387 73,303 122,120
Non-recurring fees and expenses 0 3,854 0
Total expenses 579,878 960,059 1,047,175
Net investment income (loss) 1,832,607 (99,925) (1,005,813)
Net realized gain (loss) on      
Net realized gain (loss) (38,709,532) 9,333,594 (15,245,794)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 1,039,896 (4,146,850) 494,235
Net realized and unrealized gain (loss) (37,669,636) 5,186,744 (14,751,559)
Net income (loss) (35,837,029) 5,086,819 (15,757,372)
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (38,709,532) 9,333,930 (15,267,976)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 1,045,547 (4,166,835) 509,228
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) 0 (336) 22,182
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) (5,651) 19,985 (14,993)
ProShares VIX Short-Term Futures ETF [Member]      
Investment Income      
Interest 8,917,672 3,668,406 101,051
Expenses      
Management fee 1,893,306 3,056,712 2,825,547
Brokerage commissions 318,288 570,374 459,431
Futures account fees 182,747 483,606 739,024
Non-recurring fees and expenses 0 15,841 0
Total expenses 2,394,341 4,126,533 4,024,002
Net investment income (loss) 6,523,331 (458,127) (3,922,951)
Net realized gain (loss) on      
Net realized gain (loss) (275,363,159) (35,673,890) (360,304,827)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 126,426 20,377,669 (23,793,649)
Net realized and unrealized gain (loss) (275,236,733) (15,296,221) (384,098,476)
Net income (loss) (268,713,402) (15,754,348) (388,021,427)
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (275,353,500) (35,674,319) (360,342,488)
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) 132,729 20,333,796 (23,766,529)
ProShares VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]      
Net realized gain (loss) on      
Net realized gain (loss) (9,659) 429 37,661
Change in net unrealized appreciation (depreciation) on      
Change in net unrealized appreciation (depreciation) $ (6,303) $ 43,873 $ (27,120)
[1] The operations include the activity of ProShares Short Euro ETF and ProShares UltraShort Australian Dollar ETF through May 12, 2022, the date of liquidation.