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| | concept | ocw-i:GovernmentContributionsOCW | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentContributionsOCW | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:GovernmentContributionsOCWAndEZ | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentContributionsOCWAndEZ | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-abstr:GovernmentContributionsOCWAndEZBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-abstr:GovernmentContributionsOCWAndEZBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:GovernmentSubsidiesOCW | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentSubsidiesOCW | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:GovernmentSubsidiesOCWAndEZ | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentSubsidiesOCWAndEZ | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-abstr:GovernmentSubsidiesOCWAndEZBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-abstr:GovernmentSubsidiesOCWAndEZBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:IncomeExpensesAlliancesTailoredEducation | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:IncomeExpensesAlliancesTailoredEducation | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:GovernmentContributionsOtherCentralGovernments | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentContributionsOtherCentralGovernments | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:GovernmentContributionsCentralGovernment | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentContributionsCentralGovernment | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-abstr:CentralGovernmentContributionsBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-abstr:CentralGovernmentContributionsBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:OtherContributionsSubsidiesRegionalGovernment | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:OtherContributionsSubsidiesRegionalGovernment | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:OtherContributionsSubsidiesLocalGovernmentCommonRegulations | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:OtherContributionsSubsidiesLocalGovernmentCommonRegulations | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:OtherContributionsSubsidiesOtherGovernments | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:OtherContributionsSubsidiesOtherGovernments | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:OtherContributionsSubsidiesOtherGovernmentsTotal | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:OtherContributionsSubsidiesOtherGovernmentsTotal | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-abstr:OtherGovernmentContributionsSubsidiesOtherGovernmentsBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-abstr:OtherGovernmentContributionsSubsidiesOtherGovernmentsBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-i:GovernmentContributionsSubsidiesOtherGovernments | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-i:GovernmentContributionsSubsidiesOtherGovernments | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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| | concept | ocw-abstr:GovernmentContributionsSubsidiesOtherGovernmentsBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2017-01-01')/xs:date('2017-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
| | concept | ocw-abstr:GovernmentContributionsSubsidiesOtherGovernmentsBreakdownTitle | y | | ocw-dim:ActualsEstimatesAxis | ocw-dm:ActualsMember | x | | period | xs:date('2016-01-01')/xs:date('2016-12-31') | x | | venj-bw2-dim:FinancialStatementsTypeAxis | venj-bw2-dm:SeparateMember | x |
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