v3.24.0.1

Statements of Financial Condition (Parenthetical) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Short-term U.S. government and agency obligations, cost | $ 690,346,244 | $ 1,466,423,925
ProShares Short VIX Short-Term Futures ETF [Member] |  |
Short-term U.S. government and agency obligations, cost | 109,391,681 | 144,283,581
ProShares Ultra Bloomberg Crude Oil [Member] |  |
Short-term U.S. government and agency obligations, cost | 233,435,026 | 313,413,683
ProShares Ultra Bloomberg Natural Gas [Member] |  |
Short-term U.S. government and agency obligations, cost | 64,445,510 | 263,209,299
ProShares Ultra Gold [Member] |  |
Short-term U.S. government and agency obligations, cost | 59,496,177 | 129,100,287
ProShares Ultra Silver [Member] |  |
Short-term U.S. government and agency obligations, cost | 114,255,151 | 228,617,421
ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Short-term U.S. government and agency obligations, cost | 0 | 34,728,989
ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Short-term U.S. government and agency obligations, cost | 49,673,923 | 89,407,308
ProShares UltraShort Bloomberg Natural Gas [Member] |  |
Short-term U.S. government and agency obligations, cost | 0 | 61,469,726
ProShares UltraShort Euro [Member] |  |
Short-term U.S. government and agency obligations, cost | 0 | 39,991,822
ProShares UltraShort Yen [Member] |  |
Short-term U.S. government and agency obligations, cost | 0 | 22,995,298
ProShares VIX Mid-Term Futures ETF [Member] |  |
Short-term U.S. government and agency obligations, cost | 0 | 49,876,697
ProShares VIX Short-Term Futures ETF [Member] |  |
Short-term U.S. government and agency obligations, cost | $ 59,648,776 | $ 89,329,814

X
- Definition Cost of the investment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480493/946-210-55-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-12 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 5)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 19 -Subparagraph (3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-19 + Details
Name: | us-gaap_InvestmentOwnedAtCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember
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_ProsharesUltraGoldMember
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_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_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: |