XML 42 R27.htm IDEA: XBRL DOCUMENT
v3.25.3

Organization - Additional Information (Detail) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 CreationUnit shares | Dec. 31, 2024 shares
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |
General shares, shares issued | 40 | 40
Treasury obligation measurement maximum maturity period | 12 months |
Minimum number of Creation Units that can be purchased | CreationUnit | 1 |
Number of shares issued per Creation Unit | 50,000 |
Invesco Capital Management LLC [Member] |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |
Purchase agreement transaction date | Feb. 23, 2015 |

X
- Definition Minimum number of creation units of shares that can be purchased. + References No definition available. + Details
Name: | udn_MinimumNumberOfCreationUnitsOfSharesThatCanBePurchased
Namespace Prefix: | udn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued per creation unit. + References No definition available. + Details
Name: | udn_NumberOfSharesIssuedPerCreationUnit
Namespace Prefix: | udn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Treasury obligation measurement maximum maturity period. + References No definition available. + Details
Name: | udn_TreasuryObligationMeasurementMaximumMaturityPeriod
Namespace Prefix: | udn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when acquisition agreement is executed in business combination, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-7 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-7 + Details
Name: | us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of general partner units outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=udn_InvescoCapitalManagementLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |