v3.21.1

Statements of Financial Condition - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Cash | $ 893,065,733 | $ 1,651,161,384
Receivable from capital shares sold | 4,134,427 | 49,086,388
Receivable on open futures contracts | 132,627,916 | 108,851,000
Interest receivable | 172,108 | 66,871
Total assets | 4,697,366,625 | 4,529,758,992
Liabilities |  |
Payable for capital shares redeemed | 3,233,023 | 18,280,444
Payable on open futures contracts | 45,284,062 | 27,874,393
Brokerage commissions and fees payable | 1,088,475 | 691,005
Payable to Sponsor | 4,045,514 | 3,407,672
Securities purchased payable | 38,977,944 |
Non-recurring fees and expenses payable | 48,070 | 48,070
Total liabilities | 163,162,972 | 55,507,578
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 4,534,203,653 | 4,474,251,414
Total liabilities and shareholders' equity | $ 4,697,366,625 | $ 4,529,758,992
Shares outstanding | 346,051,695 | 228,676,695
U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 2,026,935,650 | $ 1,034,986,384
Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 1,399,057,783 | 1,491,618,088
Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances | 220,571,316 | 107,967,985
Unrealized appreciation | 6,931,663 | 80,135,841
Liabilities |  |
Unrealized depreciation | 69,855,064 | 3,491,096
Foreign Currency Forward Contracts [Member] |  |
Assets |  |
Segregated cash balances | 8,060,000 | 5,716,000
Unrealized appreciation | 5,810,029 | 169,051
Liabilities |  |
Unrealized depreciation | 630,820 | 1,714,898
ProShares Short Euro [Member] |  |
Assets |  |
Cash | 1,155,210 | 4,105,781
Receivable on open futures contracts |  | 21,094
Interest receivable | 67 | 175
Total assets | 2,188,250 | 4,195,360
Liabilities |  |
Payable on open futures contracts | 1,125 |
Payable to Sponsor | 2,571 | 3,391
Non-recurring fees and expenses payable | 14 | 14
Total liabilities | 3,710 | 3,405
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 2,184,540 | 4,191,955
Total liabilities and shareholders' equity | $ 2,188,250 | $ 4,195,360
Shares outstanding | 50,000 | 100,000
Net asset value per share | $ 43.69 | $ 41.92
Market value per share (Note 2) | $ 43.52 | $ 41.35
ProShares Short Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 999,973 |
ProShares Short Euro [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 33,000 | $ 68,310
ProShares Short VIX Short-Term Futures ETF [Member] |  |
Assets |  |
Cash | 178,094,057 | 132,392,153
Receivable on open futures contracts | 84,745,212 | 74,226,825
Interest receivable | 5,009 | 4,384
Total assets | 527,638,594 | 410,810,068
Liabilities |  |
Payable on open futures contracts |  | 996,159
Brokerage commissions and fees payable | 121,727 | 114,522
Payable to Sponsor | 384,663 | 326,566
Non-recurring fees and expenses payable | 1,353 | 1,353
Total liabilities | 507,743 | 1,438,600
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 527,130,851 | 409,371,468
Total liabilities and shareholders' equity | $ 527,638,594 | $ 410,810,068
Shares outstanding | 11,184,307 | 9,884,307
Net asset value per share | $ 47.13 | $ 41.42
Market value per share (Note 2) | $ 47.10 | $ 41.44
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 91,998,460 | $ 69,999,639
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 172,795,856 | 134,187,067
ProShares Ultra Bloomberg Crude Oil [Member] |  |
Assets |  |
Cash | 227,574,108 | 491,732,847
Receivable on open futures contracts |  | 1,611,608
Interest receivable | 143,801 | 21,388
Total assets | 1,155,655,669 | 907,133,181
Liabilities |  |
Payable for capital shares redeemed |  | 3,627,934
Payable on open futures contracts | 25,300,245 |
Brokerage commissions and fees payable | 1,352 |
Payable to Sponsor | 989,343 | 728,955
Non-recurring fees and expenses payable | 37,042 | 37,042
Total liabilities | 67,076,576 | 4,393,931
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 1,088,579,093 | 902,739,250
Total liabilities and shareholders' equity | $ 1,155,655,669 | $ 907,133,181
Shares outstanding | 20,710,774 | 24,810,774
Net asset value per share | $ 52.56 | $ 36.38
Market value per share (Note 2) | $ 52.85 | $ 36.27
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 689,976,589 | $ 219,998,394
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 181,733,171 | 175,526,749
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances | 56,228,000 |
Unrealized appreciation | 0 | 18,242,195
Liabilities |  |
Unrealized depreciation | 40,748,594 | 0
ProShares Ultra Bloomberg Natural Gas [Member] |  |
Assets |  |
Cash | 31,161,434 | 92,972,312
Receivable on open futures contracts |  | 13,775,851
Interest receivable | 768 | 4,326
Total assets | 78,415,534 | 181,072,788
Liabilities |  |
Payable for capital shares redeemed | 3,233,023 | 11,132,546
Payable on open futures contracts | 798,217 |
Brokerage commissions and fees payable | 13,490 |
Payable to Sponsor | 63,318 | 139,455
Non-recurring fees and expenses payable | 416 | 416
Total liabilities | 4,108,464 | 11,272,417
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 74,307,070 | 169,800,371
Total liabilities and shareholders' equity | $ 78,415,534 | $ 181,072,788
Shares outstanding | 3,487,527 | 8,087,527
Net asset value per share | $ 21.31 | $ 21.00
Market value per share (Note 2) | $ 21.20 | $ 21.07
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 33,999,110 | $ 29,999,889
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 13,254,222 | 44,320,410
ProShares Ultra Euro [Member] |  |
Assets |  |
Cash | 2,230,111 | 4,045,092
Interest receivable | 70 | 162
Total assets | 3,841,484 | 4,741,357
Liabilities |  |
Payable to Sponsor | 3,011 | 3,625
Non-recurring fees and expenses payable | 15 | 15
Total liabilities | 229,760 | 4,007
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 3,611,724 | 4,737,350
Total liabilities and shareholders' equity | $ 3,841,484 | $ 4,741,357
Shares outstanding | 250,000 | 300,000
Net asset value per share | $ 14.45 | $ 15.79
Market value per share (Note 2) | $ 14.47 | $ 15.81
ProShares Ultra Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 999,973 |
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member] |  |
Assets |  |
Segregated cash balances | 607,000 | $ 607,000
Unrealized appreciation | 4,330 | 89,103
Liabilities |  |
Unrealized depreciation | 226,734 | 367
ProShares Ultra Gold [Member] |  |
Assets |  |
Cash | 95,364,405 | 164,381,859
Interest receivable | 2,345 | 6,531
Total assets | 214,734,298 | 263,747,871
Liabilities |  |
Brokerage commissions and fees payable | 9,172 |
Payable to Sponsor | 176,066 | 206,394
Non-recurring fees and expenses payable | 1,004 | 1,004
Total liabilities | 186,242 | 207,398
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 214,548,056 | 263,540,473
Total liabilities and shareholders' equity | $ 214,734,298 | $ 263,747,871
Shares outstanding | 3,950,000 | 3,900,000
Net asset value per share | $ 54.32 | $ 67.57
Market value per share (Note 2) | $ 53.91 | $ 68.20
ProShares Ultra Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 86,998,893 | $ 74,999,467
ProShares Ultra Gold [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 8,360,001 | 11,581,250
Receivable on open futures contracts | 1,605,224 | 148,784
ProShares Ultra Gold [Member] | Swap Agreements [Member] |  |
Assets |  |
Unrealized appreciation | 6,160,430 | 5,140,980
Liabilities |  |
Unrealized depreciation | 0 | 0
ProShares Ultra Gold [Member] | Forward Agreements [Member] |  |
Assets |  |
Segregated cash balances | 16,243,000 | 7,489,000
ProShares Ultra Silver [Member] |  |
Assets |  |
Cash | 94,849,379 | 301,951,458
Receivable from capital shares sold | 4,134,427 |
Receivable on open futures contracts | 1,465,450 |
Interest receivable | 4,633 | 10,698
Total assets | 603,646,351 | 748,159,313
Liabilities |  |
Payable on open futures contracts | 2,165,523 | 2,312,939
Brokerage commissions and fees payable | 45,354 |
Payable to Sponsor | 510,862 | 539,986
Non-recurring fees and expenses payable | 2,360 | 2,360
Total liabilities | 31,145,102 | 2,855,285
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 572,501,249 | 745,304,028
Total liabilities and shareholders' equity | $ 603,646,351 | $ 748,159,313
Shares outstanding | 13,846,526 | 14,696,526
Net asset value per share | $ 41.35 | $ 50.71
Market value per share (Note 2) | $ 41.10 | $ 51.28
ProShares Ultra Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 419,985,837 | $ 244,993,989
ProShares Ultra Silver [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 32,096,625 | 66,062,502
ProShares Ultra Silver [Member] | Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances | 51,110,000 | 78,388,000
Unrealized appreciation | 0 | 56,752,666
Liabilities |  |
Unrealized depreciation | 28,421,003 | 0
ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Assets |  |
Cash | 53,272,722 | 181,991,996
Receivable from capital shares sold |  | 49,086,388
Receivable on open futures contracts | 39,317,506 | 16,422,512
Interest receivable | 6,631 | 7,054
Total assets | 1,338,095,693 | 1,380,183,919
Liabilities |  |
Payable on open futures contracts | 12,652,068 | 22,424,475
Brokerage commissions and fees payable | 734,787 | 485,039
Payable to Sponsor | 1,352,907 | 1,040,582
Securities purchased payable | 38,977,944 |
Non-recurring fees and expenses payable | 4,817 | 4,817
Total liabilities | 53,722,523 | 23,979,720
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 1,284,373,170 | 1,356,204,199
Total liabilities and shareholders' equity | $ 1,338,095,693 | $ 1,380,183,919
Shares outstanding | 228,030,912 | 127,130,912
Net asset value per share | $ 5.63 | $ 10.67
Market value per share (Note 2) | $ 5.65 | $ 10.65
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 376,985,173 | $ 244,995,969
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 782,757,661 | 879,704,000
ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances | 85,756,000 | 7,976,000
Unrealized appreciation |  | 0
Liabilities |  |
Unrealized depreciation |  | 24,807
ProShares Ultra Yen [Member] |  |
Assets |  |
Cash | 1,972,808 | 2,618,696
Interest receivable | 84 | 111
Total assets | 2,781,919 | 2,992,042
Liabilities |  |
Payable to Sponsor | 2,171 | 2,384
Non-recurring fees and expenses payable | 11 | 11
Total liabilities | 194,225 | 2,543
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 2,587,694 | 2,989,499
Total liabilities and shareholders' equity | $ 2,781,919 | $ 2,992,042
Shares outstanding | 49,970 | 49,970
Net asset value per share | $ 51.78 | $ 59.83
Market value per share (Note 2) | $ 51.78 | $ 59.82
ProShares Ultra Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 499,986 |
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member] |  |
Assets |  |
Segregated cash balances | 306,000 | $ 306,000
Unrealized appreciation | 3,041 | 67,235
Liabilities |  |
Unrealized depreciation | 192,043 | 148
ProShares UltraShort Australian Dollar [Member] |  |
Assets |  |
Cash | 2,147,185 | 2,133,707
Interest receivable | 88 | 119
Total assets | 2,266,073 | 2,234,146
Liabilities |  |
Payable on open futures contracts | 5,400 | 9,118
Payable to Sponsor | 1,774 | 2,370
Non-recurring fees and expenses payable | 19 | 19
Total liabilities | 7,193 | 11,507
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 2,258,880 | 2,222,639
Total liabilities and shareholders' equity | $ 2,266,073 | $ 2,234,146
Shares outstanding | 50,000 | 50,000
Net asset value per share | $ 45.18 | $ 44.45
Market value per share (Note 2) | $ 45.19 | $ 43.89
ProShares UltraShort Australian Dollar [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | $ 118,800 | $ 100,320
ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Assets |  |
Cash | 33,474,775 | 74,317,150
Receivable on open futures contracts | 2,751,890 | 60,902
Interest receivable | 1,200 | 3,299
Total assets | 92,241,492 | 97,177,574
Liabilities |  |
Payable on open futures contracts | 423,827 | 257,410
Brokerage commissions and fees payable | 25,647 |
Payable to Sponsor | 73,277 | 80,580
Non-recurring fees and expenses payable | 351 | 351
Total liabilities | 523,102 | 338,341
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 91,718,390 | 96,839,233
Total liabilities and shareholders' equity | $ 92,241,492 | $ 97,177,574
Shares outstanding | 12,739,884 | 8,339,884
Net asset value per share | $ 7.20 | $ 11.61
Market value per share (Note 2) | $ 7.15 | $ 11.64
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 34,999,082 |
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 21,014,545 | $ 22,608,223
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances |  | 188,000
ProShares UltraShort Bloomberg Natural Gas [Member] |  |
Assets |  |
Cash | 12,606,546 | 12,600,775
Receivable on open futures contracts | 607,891 |
Interest receivable | 1,242 | 548
Total assets | 69,525,461 | 29,147,791
Liabilities |  |
Payable for capital shares redeemed |  | 2,604,177
Payable on open futures contracts |  | 1,543,700
Brokerage commissions and fees payable | 427 |
Payable to Sponsor | 65,619 | 22,029
Non-recurring fees and expenses payable | 140 | 140
Total liabilities | 66,186 | 4,170,046
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 69,459,275 | 24,977,745
Total liabilities and shareholders' equity | $ 69,525,461 | $ 29,147,791
Shares outstanding | 1,774,832 | 524,832
Net asset value per share | $ 39.14 | $ 47.59
Market value per share (Note 2) | $ 39.32 | $ 47.38
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 43,998,801 | $ 9,999,861
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 12,310,981 | 6,546,607
ProShares UltraShort Euro [Member] |  |
Assets |  |
Cash | 29,681,455 | 42,133,228
Interest receivable | 920 | 2,148
Total assets | 55,159,479 | 54,139,942
Liabilities |  |
Payable to Sponsor | 45,247 | 43,974
Non-recurring fees and expenses payable | 220 | 220
Total liabilities | 227,342 | 1,186,603
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 54,932,137 | 52,953,339
Total liabilities and shareholders' equity | $ 55,159,479 | $ 54,139,942
Shares outstanding | 2,250,000 | 2,350,000
Net asset value per share | $ 24.41 | $ 22.53
Market value per share (Note 2) | $ 24.42 | $ 22.52
ProShares UltraShort Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 17,999,536 | $ 9,999,861
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member] |  |
Assets |  |
Segregated cash balances | 4,041,000 | 1,999,000
Unrealized appreciation | 3,436,568 | 5,705
Liabilities |  |
Unrealized depreciation | 181,875 | 1,142,409
ProShares UltraShort Gold [Member] |  |
Assets |  |
Cash | 22,381,424 | 16,935,121
Receivable on open futures contracts |  | 1,317
Interest receivable | 615 | 742
Total assets | 42,506,473 | 20,635,430
Liabilities |  |
Payable on open futures contracts | 548,420 | 12,410
Brokerage commissions and fees payable | 1,492 |
Payable to Sponsor | 27,498 | 16,835
Non-recurring fees and expenses payable | 81 | 81
Total liabilities | 1,262,958 | 298,054
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 41,243,515 | 20,337,376
Total liabilities and shareholders' equity | $ 42,506,473 | $ 20,635,430
Shares outstanding | 1,096,977 | 646,977
Net asset value per share | $ 37.60 | $ 31.43
Market value per share (Note 2) | $ 37.89 | $ 31.14
ProShares UltraShort Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 12,999,597 |
ProShares UltraShort Gold [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 2,923,750 | $ 1,503,750
ProShares UltraShort Gold [Member] | Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances | 4,201,087 | 2,194,500
Unrealized appreciation | 0 | 0
Liabilities |  |
Unrealized depreciation | 685,467 | 268,728
ProShares UltraShort Silver [Member] |  |
Assets |  |
Cash | 15,590,378 | 18,919,314
Receivable on open futures contracts | 247,484 | 39,445
Interest receivable | 351 | 814
Total assets | 45,561,982 | 32,195,308
Liabilities |  |
Payable on open futures contracts | 381,175 | 86,282
Brokerage commissions and fees payable | 3,309 |
Payable to Sponsor | 32,701 | 25,557
Non-recurring fees and expenses payable | 133 | 133
Total liabilities | 417,318 | 3,309,533
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 45,144,664 | 28,885,775
Total liabilities and shareholders' equity | $ 45,561,982 | $ 32,195,308
Shares outstanding | 6,466,976 | 4,166,976
Net asset value per share | $ 6.98 | $ 6.93
Market value per share (Note 2) | $ 7.01 | $ 6.85
ProShares UltraShort Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 14,999,620 |
ProShares UltraShort Silver [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 6,919,687 | $ 1,503,250
ProShares UltraShort Silver [Member] | Swap Agreements [Member] |  |
Assets |  |
Segregated cash balances | 7,033,229 | 11,732,485
Unrealized appreciation | 771,233 | 0
Liabilities |  |
Unrealized depreciation | 0 | 3,197,561
ProShares UltraShort Yen [Member] |  |
Assets |  |
Cash | 15,006,733 | 21,470,564
Interest receivable | 504 | 914
Total assets | 34,978,962 | 24,282,486
Liabilities |  |
Payable to Sponsor | 26,860 | 19,348
Non-recurring fees and expenses payable | 94 | 94
Total liabilities | 57,122 | 591,416
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 34,921,840 | 23,691,070
Total liabilities and shareholders' equity | $ 34,978,962 | $ 24,282,486
Shares outstanding | 449,290 | 349,290
Net asset value per share | $ 77.73 | $ 67.83
Market value per share (Note 2) | $ 77.75 | $ 67.81
ProShares UltraShort Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 14,499,635 |
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member] |  |
Assets |  |
Segregated cash balances | 3,106,000 | $ 2,804,000
Unrealized appreciation | 2,366,090 | 7,008
Liabilities |  |
Unrealized depreciation | 30,168 | 571,974
ProShares VIX Mid-Term Futures ETF [Member] |  |
Assets |  |
Cash | 29,170,532 | 14,723,084
Receivable on open futures contracts |  | 247,077
Interest receivable | 1,499 | 643
Total assets | 75,379,884 | 73,050,286
Liabilities |  |
Payable for capital shares redeemed |  | 915,787
Payable on open futures contracts | 188,562 |
Brokerage commissions and fees payable | 11,270 | 10,395
Payable to Sponsor | 57,305 | 49,009
Total liabilities | 257,137 | 975,191
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 75,122,747 | 72,075,095
Total liabilities and shareholders' equity | $ 75,379,884 | $ 73,050,286
Shares outstanding | 2,162,403 | 1,962,403
Net asset value per share | $ 34.74 | $ 36.73
Market value per share (Note 2) | $ 35.06 | $ 36.70
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 31,999,153 | $ 44,999,732
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | 14,208,700 | 13,079,750
ProShares VIX Short-Term Futures ETF [Member] |  |
Assets |  |
Cash | 47,332,471 | 71,736,247
Receivable on open futures contracts | 1,887,259 | 2,295,585
Interest receivable | 2,281 | 2,815
Total assets | 352,749,027 | 293,860,130
Liabilities |  |
Payable on open futures contracts | 2,819,500 | 231,900
Brokerage commissions and fees payable | 120,448 | 81,049
Payable to Sponsor | 230,321 | 156,632
Total liabilities | 3,170,269 | 469,581
Commitments and Contingencies (Note 2) |  |
Shareholders' equity |  |
Shareholders' equity | 349,578,758 | 293,390,549
Total liabilities and shareholders' equity | $ 352,749,027 | $ 293,860,130
Shares outstanding | 37,501,317 | 21,326,317
Net asset value per share | $ 9.32 | $ 13.76
Market value per share (Note 2) | $ 9.35 | $ 13.74
ProShares VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member] |  |
Assets |  |
Short-term U.S. government and agency obligations (Note 3) | $ 152,996,232 | $ 84,999,583
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member] |  |
Assets |  |
Segregated cash balances | $ 150,530,784 | $ 134,825,900

X
- Definition Brokerage fees payable to broker dealers and clearing organizations. + References No definition available. + Details
Name: | ck0001415311_BrokerageFeesPayableToBrokerDealersAndClearingOrganizations
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Market value per share. + References No definition available. + Details
Name: | ck0001415311_MarketValuePerShare
Namespace Prefix: | ck0001415311_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents carrying value of non recurring fees and expenses payable. + References No definition available. + Details
Name: | ck0001415311_NonrecurringFeesAndExpensesPayable
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payable for capital shares redeemed. + References No definition available. + Details
Name: | ck0001415311_PayableForCapitalSharesRedeemed
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payable for Securities purchased. + References No definition available. + Details
Name: | ck0001415311_PayableForSecuritiesPurchased
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Receivable for capital shares sold. + References No definition available. + Details
Name: | ck0001415311_ReceivableForCapitalSharesSold
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | srt_PayablesToBrokerDealersAndClearingOrganizations
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount for accounts payable to related parties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.17) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
Name: | us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118262064&loc=SL116631418-115840 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=118262064&loc=SL116631419-115840 + Details
Name: | us-gaap_Cash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers). + References No definition available. + Details
Name: | us-gaap_CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),19) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
Name: | us-gaap_CommitmentsAndContingencies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_InterestReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5D -Subparagraph (SX 210.12-13D(Column C)) -URI http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)) -URI http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010 + Details
Name: | us-gaap_InvestmentOwnedAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
Name: | us-gaap_Liabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(23)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(25)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(32)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 + Details
Name: | us-gaap_LiabilitiesAndStockholdersEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI http://asc.fasb.org/extlink&oid=117332851&loc=SL7495116-110257 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 50 -Paragraph 7 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 59 -URI http://asc.fasb.org/extlink&oid=117332851&loc=SL6740821-110257 + Details
Name: | us-gaap_NetAssetValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958 + Details
Name: | us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_StockholdersEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FutureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_SwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesShortEuroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesShortVixShortTermFuturesEtfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraBloombergCrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraBloombergNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraEuroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraGoldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraSilverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraYenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortAustralianDollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortBloombergCrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortBloombergNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortEuroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortGoldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortSilverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortYenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesVixMidTermFuturesEtfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesVixShortTermFuturesEtfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |