| r0.c0 | Other accruals and deferred income, specification total/Other accruals and deferred income (current) | ocw-i:AccrualsOtherCurrent | nl-types:monetaryNoDecimalsItemType | instant | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:LiabilitiesCurrentSpecificationComponentMember | * | N/A |
| r0.c1 | Other accruals and deferred income, specification total/Other accruals and deferred income (current) | ocw-i:AccrualsOtherCurrent | nl-types:monetaryNoDecimalsItemType | instant | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:LiabilitiesCurrentSpecificationComponentMember | * | N/A |
| r0.c2 | Other accruals and deferred income, specification total/Current | | | | N/A | N/A | N/A | * | xs:date('2018-12-31') |
| r0.c3 | Other accruals and deferred income, specification total/Previous | | | | N/A | N/A | N/A | * | xs:date('2017-12-31') |
| r1.c0 | ocw-table_NotesLiabilitiesCurrentAccrualsOtherSpecification-y/Other accruals and deferred income (current) | ocw-i:AccrualsOtherCurrent | nl-types:monetaryNoDecimalsItemType | instant | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:LiabilitiesCurrentSpecificationComponentMember | * | N/A |
| r1.c1 | ocw-table_NotesLiabilitiesCurrentAccrualsOtherSpecification-y/Other accruals and deferred income (current) | ocw-i:AccrualsOtherCurrent | nl-types:monetaryNoDecimalsItemType | instant | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:LiabilitiesCurrentSpecificationComponentMember | * | N/A |
| r1.c2 | ocw-table_NotesLiabilitiesCurrentAccrualsOtherSpecification-y/Current | | | | N/A | N/A | N/A | * | xs:date('2018-12-31') |
| r1.c3 | ocw-table_NotesLiabilitiesCurrentAccrualsOtherSpecification-y/Previous | | | | N/A | N/A | N/A | * | xs:date('2017-12-31') |