| r0.c0 | Disclosure of financial assets/Current | jenv-bw2-i:FinancialAssetsDisclosure | nl-types:formattedExplanationItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r1.c0 | Disclosure of shares, certificates of shares and other types of participating interests in group companies/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsInGroupCompaniesDisclosure | nl-types:formattedExplanationItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r2.c0 | Disclosure of other investments in participating interests/Current | jenv-bw2-i:InvestmentsInParticipatingInterestsOtherDisclosure | nl-types:formattedExplanationItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r3.c0 | Disclosure of non-current receivables from group companies/Current | jenv-bw2-i:ReceivablesGroupCompaniesNoncurrentDisclosure | nl-types:formattedExplanationItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r4.c0 | Disclosure of non-current receivables from other affiliated companies/Current | jenv-bw2-i:ReceivablesOtherAffiliatedCompaniesNoncurrentDisclosure | nl-types:formattedExplanationItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r5.c0 | Disclosure of receivables from OCW and EZ (non-current)/Current | ocw-i:ReceivablesOCWAndEZNoncurrentDisclosure | nl-types:string100000ItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r6.c0 | Disclosure of receivables from local government and common regulations (non-current)/Current | ocw-i:ReceivablesLocalGovernmentCommonRegulationsNoncurrentDisclosure | nl-types:string100000ItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r7.c0 | Disclosure of securities (non-current)/Current | ocw-i:SecuritiesNoncurrentDisclosure | nl-types:string100000ItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |
| r8.c0 | Disclosure of non-current other receivables/Current | jenv-bw2-i:ReceivablesOtherNoncurrentDisclosure | nl-types:formattedExplanationItemType | duration | jenv-bw2-dm:ConsolidatedMember | ocw-dm:ActualsMember | xs:date('2020-01-01')/xs:date('2020-12-31') |