v3.8.0.1

Statements of Changes in Shareholders' Equity (Parenthetical) | 9 Months Ended
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Sep. 30, 2017 shares
Addition, shares | 196,810,016
Redemption, shares | 168,876,807
Net addition (redemption), shares | 27,933,209
ProShares VIX Short-Term Futures ETF [Member] |
Addition, shares | 6,125,000
Redemption, shares | 2,301,046
Net addition (redemption), shares | 3,823,954
ProShares VIX Mid-Term Futures ETF [Member] |
Addition, shares | 850,000
Redemption, shares | 150,000
Net addition (redemption), shares | 700,000
ProShares Short VIX Short-Term Futures ETF [Member] |
Addition, shares | 46,750,000
Redemption, shares | 40,650,000
Net addition (redemption), shares | 6,100,000
ProShares Ultra VIX Short-Term Futures ETF [Member] |
Addition, shares | 51,185,000
Redemption, shares | 28,223,145
Net addition (redemption), shares | 22,961,855
ProShares UltraShort Bloomberg Crude Oil [Member] |
Addition, shares | 10,700,000
Redemption, shares | 9,950,000
Net addition (redemption), shares | 750,000
Pro Shares UltraPro 3X Short Crude Oil ETF [Member] |
Addition, shares | 1,050,008
Redemption, shares | 150,000
Net addition (redemption), shares | 900,008
ProShares UltraShort Bloomberg Natural Gas [Member] |
Addition, shares | 300,000
Redemption, shares | 300,000
Net addition (redemption), shares | 0
ProShares UltraShort Gold [Member] |
Addition, shares | 300,000
Redemption, shares | 500,000
Net addition (redemption), shares | (200,000)
ProShares UltraShort Silver [Member] |
Addition, shares | 700,000
Redemption, shares | 600,000
Net addition (redemption), shares | 100,000
ProShares Short Euro [Member] |
Redemption, shares | 150,000
Net addition (redemption), shares | (150,000)
ProShares UltraShort Australian Dollar [Member] |
Redemption, shares | 100,000
Net addition (redemption), shares | (100,000)
ProShares UltraShort Euro [Member] |
Addition, shares | 1,800,000
Redemption, shares | 4,250,000
Net addition (redemption), shares | (2,450,000)
ProShares UltraShort Yen [Member] |
Addition, shares | 900,000
Redemption, shares | 2,350,000
Net addition (redemption), shares | (1,450,000)
ProShares Ultra Bloomberg Crude Oil [Member] |
Addition, shares | 65,600,000
Redemption, shares | 70,852,616
Net addition (redemption), shares | (5,252,616)
ProShares UltraPro 3x Crude Oil ETF [Member] |
Addition, shares | 1,400,008
Redemption, shares | 1,100,000
Net addition (redemption), shares | 300,008
ProShares Ultra Bloomberg Natural Gas [Member] |
Addition, shares | 6,600,000
Redemption, shares | 3,050,000
Net addition (redemption), shares | 3,550,000
ProShares Ultra Gold [Member] |
Addition, shares | 400,000
Redemption, shares | 950,000
Net addition (redemption), shares | (550,000)
ProShares Ultra Silver [Member] |
Addition, shares | 950,000
Redemption, shares | 2,000,000
Net addition (redemption), shares | (1,050,000)
ProShares Ultra Euro [Member] |
Addition, shares | 1,200,000
Redemption, shares | 1,250,000
Net addition (redemption), shares | (50,000)

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