v3.21.1
Financial Highlights - Per Share Operating Performance (Detail) - $ / shares
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
ProShares Short Euro [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 41.92 $ 45.64
Net investment income (loss) (0.09) 0.04
Net realized and unrealized gain (loss) [1] 1.86 0.98
Change in net asset value from operations 1.77 1.02
Net asset value, ending balance 43.69 46.66
Market value per share, beginning balance [2] 41.35 45.69
Market value per share, ending balance [2] $ 43.52 $ 45.09
Total Return, at net asset value 4.20% [3] 2.20% [4]
Total Return, at market value 5.20% [3] (1.30%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 0.97% 0.97%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.91%) 0.34%
ProShares Short VIX Short-Term Futures ETF [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 41.42 $ 65.62
Net investment income (loss) (0.14) (0.04)
Net realized and unrealized gain (loss) [1] 5.85 (34.56)
Change in net asset value from operations 5.71 (34.60)
Net asset value, ending balance 47.13 31.02
Market value per share, beginning balance [2] 41.44 65.23
Market value per share, ending balance [2] $ 47.10 $ 31.01
Total Return, at net asset value 13.80% [3] (52.70%) [4]
Total Return, at market value 13.70% [3] (52.50%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.35% 1.19%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.31%) (0.38%)
ProShares Ultra Bloomberg Crude Oil [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 36.38 $ 509.23
Net investment income (loss) (0.13) 0.20
Net realized and unrealized gain (loss) [1] 16.31 (469.28)
Change in net asset value from operations 16.18 (469.08)
Net asset value, ending balance 52.56 40.15
Market value per share, beginning balance [2] 36.27 511.50
Market value per share, ending balance [2] $ 52.85 $ 39.75
Total Return, at net asset value 44.50% [3] (92.10%) [4]
Total Return, at market value 45.70% [3] (92.20%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.10% 1.09%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.04%) 0.44%
ProShares Ultra Bloomberg Natural Gas [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 21.00 $ 83.97 [6]
Net investment income (loss) (0.09) 0.00 [6],[7]
Net realized and unrealized gain (loss) 0.40 (42.15) [1],[6]
Change in net asset value from operations 0.31 (42.15) [6]
Net asset value, ending balance 21.31 41.82 [6]
Market value per share, beginning balance 21.07 83.40 [2],[6]
Market value per share, ending balance $ 21.20 $ 42.60 [2],[6]
Total Return, at net asset value 1.50% (50.20%) [4],[6]
Total Return, at market value 0.60% (48.90%) [4],[6]
Ratios to Average Net Assets    
Expense ratio [5] 1.60% 1.39% [6]
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95% [6]
Net investment income gain (loss) [5] (1.55%) (0.02%) [6]
ProShares Ultra Euro [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 15.79 $ 13.79
Net investment income (loss) (0.03) 0.01
Net realized and unrealized gain (loss) [1] (1.31) (0.64)
Change in net asset value from operations (1.34) (0.63)
Net asset value, ending balance 14.45 13.16
Market value per share, beginning balance [2] 15.81 13.77
Market value per share, ending balance [2] $ 14.47 $ 13.15
Total Return, at net asset value (8.50%) [3] (4.60%) [4]
Total Return, at market value (8.50%) [3] (4.50%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 0.95% 0.95%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.90%) 0.25%
ProShares Ultra Gold [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 67.57 $ 49.21
Net investment income (loss) (0.14) 0.05
Net realized and unrealized gain (loss) [1] (13.11) 3.18
Change in net asset value from operations (13.25) 3.23
Net asset value, ending balance 54.32 52.44
Market value per share, beginning balance [2] 68.20 49.05
Market value per share, ending balance [2] $ 53.91 $ 52.00
Total Return, at net asset value (19.60%) [3] 6.60% [4]
Total Return, at market value (21.00%) [3] 6.00% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.03% 0.98%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.97%) 0.35%
ProShares Ultra Silver [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 50.71 $ 31.70
Net investment income (loss) (0.12) 0.04
Net realized and unrealized gain (loss) [1] (9.24) (13.32)
Change in net asset value from operations (9.36) (13.28)
Net asset value, ending balance 41.35 18.42
Market value per share, beginning balance [2] 51.28 31.65
Market value per share, ending balance [2] $ 41.10 $ 18.44
Total Return, at net asset value (18.50%) [3] (41.90%) [4]
Total Return, at market value (19.90%) [3] (41.70%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.07% 0.99%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.02%) 0.55%
ProShares Ultra VIX Short-Term Futures ETF [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 10.67 $ 12.67
Net investment income (loss) (0.04) (0.02)
Net realized and unrealized gain (loss) [1] (5.00) 45.87
Change in net asset value from operations (5.04) 45.85
Net asset value, ending balance 5.63 58.52
Market value per share, beginning balance [2] 10.65 12.89
Market value per share, ending balance [2] $ 5.65 $ 58.56
Total Return, at net asset value (47.20%) [3] 361.90% [4]
Total Return, at market value (47.00%) [3] 354.30% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.77% 1.47%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.75%) (0.50%)
ProShares Ultra Yen [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 59.83 $ 55.83
Net investment income (loss) (0.13) 0.03
Net realized and unrealized gain (loss) [1] (7.92) 0.35
Change in net asset value from operations (8.05) 0.38
Net asset value, ending balance 51.78 56.21
Market value per share, beginning balance [2] 59.82 55.83
Market value per share, ending balance [2] $ 51.78 $ 56.19
Total Return, at net asset value (13.40%) [3] 0.70% [4]
Total Return, at market value (13.50%) [3] 0.60% [4]
Ratios to Average Net Assets    
Expense ratio [5] 0.95% 0.95%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.90%) 0.21%
Proshares UltraPro 3X Crude Oil ETF [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance [8]   $ 21.47
Net investment income (loss) [7],[8]   0.00
Net realized and unrealized gain (loss) [1],[8]   (21.26)
Change in net asset value from operations [8]   (21.26)
Net asset value, ending balance [8],[9]   0.21
Market value per share, beginning balance [2],[8]   21.60
Market value per share, ending balance [2],[8]   $ 0.22
Total Return, at net asset value [4],[8]   (99.00%)
Total Return, at market value [4],[8]   (99.00%)
Ratios to Average Net Assets    
Expense ratio [5],[8]   1.65%
Expense ratio, excluding brokerage commissions and fees [5],[8]   0.95%
Net investment income gain (loss) [5],[8]   (0.49%)
ProShares UltraPro 3X Short Crude Oil ETF [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance [8]   $ 10.66
Net investment income (loss) [8]   (0.01)
Net realized and unrealized gain (loss) [1],[8]   34.88
Change in net asset value from operations [8]   34.87
Net asset value, ending balance [8],[9]   45.53
Market value per share, beginning balance [2],[8]   10.58
Market value per share, ending balance [2],[8]   $ 45.32
Total Return, at net asset value [4],[8]   327.10%
Total Return, at market value [4],[8]   328.40%
Ratios to Average Net Assets    
Expense ratio [5],[8]   1.68%
Expense ratio, excluding brokerage commissions and fees [5],[8]   0.95%
Net investment income gain (loss) [5],[8]   (0.33%)
ProShares UltraShort Australian Dollar [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 44.45 $ 56.09
Net investment income (loss) (0.11) 0.03
Net realized and unrealized gain (loss) [1] 0.84 16.18
Change in net asset value from operations 0.73 16.21
Net asset value, ending balance 45.18 72.30
Market value per share, beginning balance [2] 43.89 55.88
Market value per share, ending balance [2] $ 45.19 $ 72.06
Total Return, at net asset value 1.60% [3] 28.90% [4]
Total Return, at market value 3.00% [3] 29.00% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.02% 1.04%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.97%) 0.22%
ProShares UltraShort Bloomberg Crude Oil [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 11.61 $ 12.19
Net investment income (loss) (0.03) (0.01)
Net realized and unrealized gain (loss) [1] (4.38) 36.89
Change in net asset value from operations (4.41) 36.88
Net asset value, ending balance 7.20 49.07
Market value per share, beginning balance [2] 11.64 12.15
Market value per share, ending balance [2] $ 7.15 $ 49.99
Total Return, at net asset value (38.00%) [3] 302.50% [4]
Total Return, at market value (38.60%) [3] 311.40% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.34% 1.31%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.29%) (0.14%)
ProShares UltraShort Bloomberg Natural Gas [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 47.59 $ 38.53
Net investment income (loss) (0.14) (0.08)
Net realized and unrealized gain (loss) [1] (8.31) 24.93
Change in net asset value from operations (8.45) 24.85
Net asset value, ending balance 39.14 63.38
Market value per share, beginning balance [2] 47.38 38.82
Market value per share, ending balance [2] $ 39.32 $ 62.02
Total Return, at net asset value (17.80%) [3] 64.50% [4]
Total Return, at market value (17.00%) [3] 59.80% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.60% 1.90%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.55%) (0.65%)
ProShares UltraShort Euro [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 22.53 $ 26.80
Net investment income (loss) (0.05) 0.03
Net realized and unrealized gain (loss) [1] 1.93 0.99
Change in net asset value from operations 1.88 1.02
Net asset value, ending balance 24.41 27.82
Market value per share, beginning balance [2] 22.52 26.80
Market value per share, ending balance [2] $ 24.42 $ 27.76
Total Return, at net asset value 8.40% [3] 3.80% [4]
Total Return, at market value 8.40% [3] 3.60% [4]
Ratios to Average Net Assets    
Expense ratio [5] 0.95% 0.95%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.90%) 0.49%
ProShares UltraShort Gold [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 31.43 $ 53.02
Net investment income (loss) (0.09) 0.04
Net realized and unrealized gain (loss) [1] 6.26 (7.04)
Change in net asset value from operations 6.17 (7.00)
Net asset value, ending balance 37.60 46.02
Market value per share, beginning balance [2] 31.14 53.21
Market value per share, ending balance [2] $ 37.89 $ 46.28
Total Return, at net asset value 19.60% [3] (13.20%) [4]
Total Return, at market value 21.70% [3] (13.00%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.07% 1.00%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.03%) 0.34%
ProShares UltraShort Silver [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 6.93 $ 26.76
Net investment income (loss) (0.02) 0.01
Net realized and unrealized gain (loss) [1] 0.07 9.77
Change in net asset value from operations 0.05 9.78
Net asset value, ending balance 6.98 36.54
Market value per share, beginning balance [2] 6.85 26.80
Market value per share, ending balance [2] $ 7.01 $ 36.66
Total Return, at net asset value 0.70% [3] 36.50% [4]
Total Return, at market value 2.30% [3] 36.80% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.15% 1.05%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (1.11%) 0.09%
ProShares UltraShort Yen [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 67.83 $ 76.37
Net investment income (loss) (0.16) 0.09
Net realized and unrealized gain (loss) [1] 10.06 (2.36)
Change in net asset value from operations 9.90 (2.27)
Net asset value, ending balance 77.73 74.10
Market value per share, beginning balance [2] 67.81 76.35
Market value per share, ending balance [2] $ 77.75 $ 74.11
Total Return, at net asset value 14.70% [3] (3.00%) [4]
Total Return, at market value 14.60% [3] (2.90%) [4]
Ratios to Average Net Assets    
Expense ratio [5] 0.95% 0.95%
Expense ratio, excluding brokerage commissions and fees [5] 0.95% 0.95%
Net investment income gain (loss) [5] (0.90%) 0.47%
ProShares VIX Mid-Term Futures ETF [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 36.73 $ 21.27
Net investment income (loss) (0.09) 0.03
Net realized and unrealized gain (loss) [1] (1.90) 17.44
Change in net asset value from operations (1.99) 17.47
Net asset value, ending balance 34.74 38.74
Market value per share, beginning balance [2] 36.70 21.29
Market value per share, ending balance [2] $ 35.06 $ 38.44
Total Return, at net asset value (5.40%) [3] 82.10% [4]
Total Return, at market value (4.50%) [3] 80.60% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.03% 1.00%
Expense ratio, excluding brokerage commissions and fees [5] 0.85% 0.85%
Net investment income gain (loss) [5] (0.98%) 0.43%
ProShares VIX Short-Term Futures ETF [Member]    
Investment Company, Financial Highlights [Line Items]    
Net asset value, beginning balance $ 13.76 $ 12.30
Net investment income (loss) (0.04) 0.01
Net realized and unrealized gain (loss) [1] (4.40) 25.65
Change in net asset value from operations (4.44) 25.66
Net asset value, ending balance 9.32 37.96
Market value per share, beginning balance [2] 13.74 12.43
Market value per share, ending balance [2] $ 9.35 $ 37.93
Total Return, at net asset value (32.30%) [3] 208.60% [4]
Total Return, at market value (32.00%) [3] 205.10% [4]
Ratios to Average Net Assets    
Expense ratio [5] 1.30% 1.11%
Expense ratio, excluding brokerage commissions and fees [5] 0.85% 0.85%
Net investment income gain (loss) [5] (1.26%) 0.20%
[1] The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period.
[2] Market values are determined at the close of the applicable primary listing exchange, which may be later than when the Funds’ net asset value is calculated.
[3] Percentages are not annualized for the period ended March 31, 2021.
[4] Percentages are not annualized for the period ended March 31, 2020.
[5] Percentages are annualized.
[6] See Note 1 of these Notes to Financial Statements.
[7] Amount represents greater than $(0.005).
[8] The per share operating performance presented here is for the period ended March 27, 2020, the date liquidation was determined to be imminent. See Note 1.
[9] NAV on March 27, 2020, the date liquidation was determined to be imminent. See Note 1.