| r0.c0 | Balance sheet items at year start adjusted/Current | ocw-i:BalanceSheetItemsAtYearStartAdjusted | xbrli:booleanItemType | duration | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r1.c0 | Disclosure of balance sheet items at year start adjustment/Current | ocw-i:BalanceSheetItemsAtYearStartAdjustmentDisclosure | nl-types:string100000ItemType | duration | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r2.c0 | Disclosure of balance sheet/Current | ocw-i:BalanceSheetDisclosure | nl-types:string100000ItemType | duration | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |
| r3.c0 | Disclosure of subsequent events/Current | venj-bw2-i:SubsequentEventsDisclosure | nl-types:formattedExplanationItemType | duration | xs:date('2017-01-01')/xs:date('2017-12-31') | venj-bw2-dm:SeparateMember |