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                   decimals="0"
                   id="f0__s5__4__13"
                   unitRef="dkk">-39</fsa:ProfitLoss>
   <fsa:ProfitLoss contextRef="ctx-1"
                   decimals="0"
                   id="f0__s5__5__13"
                   unitRef="dkk">-39</fsa:ProfitLoss>
   <fsa:Equity contextRef="ctx-10"
               decimals="0"
               id="f0__s5__3__14"
               unitRef="dkk">1125000</fsa:Equity>
   <fsa:Equity contextRef="ctx-13"
               decimals="0"
               id="f0__s5__4__14"
               unitRef="dkk">-27557</fsa:Equity>
   <fsa:Equity contextRef="ctx-3"
               decimals="0"
               id="f0__s5__5__14"
               unitRef="dkk">1097443</fsa:Equity>
   <fsa:DisclosureOfContributedCapital contextRef="ctx-1" id="pp-value-29-1" xml:lang="en">The share capital consists of shares of 1,125 of each DKK 1,000. No shares are assigned special rights. There have been no changes to the share capital for the last five years. </fsa:DisclosureOfContributedCapital>
   <fsa:DisclosureOfTaxExpenses contextRef="ctx-1" id="pp-value-30-1" xml:lang="en">DKK 2025 2024 1. Tax on profit for the yearCurrent tax for the year11 40 Adjustment tax prior year0 -192Tax on profit for the year11 -152</fsa:DisclosureOfTaxExpenses>
   <fsa:DisclosureOfRelatedParties contextRef="ctx-1" id="pp-value-32-1" xml:lang="en">2. Related parties and ownershipCOWI A/S owns all shares in Studstrup &amp; Østgaard A/S Rådgivende Ingeniørfirma.In accordance with section 98 C(6) of the Danish Financial Statements Act, transactions with related parties at arm's length have not been disclosed. </fsa:DisclosureOfRelatedParties>
   <fsa:InformationOnRemunerationOfManagementCategoriesAndSpecialIncentiveProgrammes contextRef="ctx-1" id="pp-value-31-1" xml:lang="en">Apart from usual intercompany transactions and usual management remuneration, no transactions were made during the year with the Board of Directors, the Executive Board, managerial employees, principal shareholders, other group companies or other related parties. </fsa:InformationOnRemunerationOfManagementCategoriesAndSpecialIncentiveProgrammes>
   <fsa:DisclosureOfContingentLiabilities contextRef="ctx-1" id="pp-value-34-1" xml:lang="en">3. Contingent liabilitiesThe Group's companies are jointly and severally liable for tax on the Group's jointly-taxed income etc. The totalamount appears in the annual report for COWI Holding A/S, which is the management company in the jointtaxation.The conditions for omitting audit have been met. </fsa:DisclosureOfContingentLiabilities>
   <fsa:DisclosureOfEmployeeBenefitsExpense contextRef="ctx-1" id="pp-value-36-1" xml:lang="en">4. Employee conditionsThe company had no paid employees in 2024 and 2025.</fsa:DisclosureOfEmployeeBenefitsExpense>
   <fsa:DisclosureOfMainActivitiesAndAccountingAndFinancialMatters contextRef="ctx-1" id="pp-value-35-1" xml:lang="en">5. The company's principal servicesThe company has no activity.</fsa:DisclosureOfMainActivitiesAndAccountingAndFinancialMatters>
   <gsd:InformationOnTypeOfSubmittedReport contextRef="ctx-1" id="f0__s0__72__15">Annual report</gsd:InformationOnTypeOfSubmittedReport>
   <cmn:TypeOfAuditorAssistance contextRef="ctx-1" id="f0__s0__72__16">No audit assistance</cmn:TypeOfAuditorAssistance>
   <gsd:ToolForPreparingTheXBRLInstanceDocument contextRef="ctx-1" id="f0__s0__72__17" xml:lang="en">ParsePort XBRL Converter</gsd:ToolForPreparingTheXBRLInstanceDocument>
   <gsd:ReportingPeriodStartDate contextRef="ctx-1" id="f0__s0__72__20">2025-01-01</gsd:ReportingPeriodStartDate>
   <gsd:ReportingPeriodEndDate contextRef="ctx-1" id="f0__s0__72__21">2025-12-31</gsd:ReportingPeriodEndDate>
   <gsd:PrecedingReportingPeriodStartDate contextRef="ctx-1" id="f0__s0__72__22">2024-01-01</gsd:PrecedingReportingPeriodStartDate>
   <gsd:PredingReportingPeriodEndDate contextRef="ctx-1" id="f0__s0__72__23">2024-12-31</gsd:PredingReportingPeriodEndDate>
   <gsd:DateOfGeneralMeeting contextRef="ctx-1" id="f0__s0__72__36">2026-04-30</gsd:DateOfGeneralMeeting>
   <fsa:ClassOfReportingEntity contextRef="ctx-1" id="f0__s0__72__45">Reporting class B</fsa:ClassOfReportingEntity>
   <gsd:TelephoneNumberOfReportingEntity contextRef="ctx-1" id="f0__s0__72__59" xml:lang="en">56400000</gsd:TelephoneNumberOfReportingEntity>
   <fsa:AverageNumberOfEmployees contextRef="ctx-1"
                                 decimals="0"
                                 id="f0__s0__72__73"
                                 unitRef="pure">0</fsa:AverageNumberOfEmployees>
   <fsa:AverageNumberOfEmployees contextRef="ctx-2"
                                 decimals="0"
                                 id="f0__s0__73__73"
                                 unitRef="pure">0</fsa:AverageNumberOfEmployees>
   <sob:DateOfApprovalOfAnnualReport contextRef="ctx-1" id="f0__s0__72__77">2026-04-30</sob:DateOfApprovalOfAnnualReport>
   <gsd:LegalEntityIdentifierOfSubmittingEnterprise contextRef="ctx-1" id="f0__s0__72__168">529900VSWLQF0O3GA946</gsd:LegalEntityIdentifierOfSubmittingEnterprise>
   <gsd:IdentificationNumberCvrOfSubmittingEnterprise contextRef="ctx-1" id="f0__s0__72__169">33771231</gsd:IdentificationNumberCvrOfSubmittingEnterprise>
   <gsd:NameOfSubmittingEnterprise contextRef="ctx-1" id="f0__s0__72__170" xml:lang="en">PricewaterhouseCoopers Statsautoriseret Revisionspartnerselskab</gsd:NameOfSubmittingEnterprise>
   <gsd:AddressOfSubmittingEnterpriseStreetAndNumber contextRef="ctx-1" id="f0__s0__72__171" xml:lang="en">Strandvejen 44</gsd:AddressOfSubmittingEnterpriseStreetAndNumber>
   <gsd:AddressOfSubmittingEnterprisePostcodeAndTown contextRef="ctx-1" id="f0__s0__72__172" xml:lang="en">2900 Hellerup</gsd:AddressOfSubmittingEnterprisePostcodeAndTown>
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