| r0.c0 | Replacement fund contributions, specification total/Replacement fund contributions | ocw-i:ReplacementFundContributions | nl-types:monetaryNoDecimalsItemType | duration | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:ExpensesSpecificationComponentMember | * | N/A |
| r0.c1 | Replacement fund contributions, specification total/Replacement fund contributions | ocw-i:ReplacementFundContributions | nl-types:monetaryNoDecimalsItemType | duration | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:ExpensesSpecificationComponentMember | * | N/A |
| r0.c2 | Replacement fund contributions, specification total/Current | | | | N/A | N/A | N/A | * | xs:date('2018-01-01')/xs:date('2018-12-31') |
| r0.c3 | Replacement fund contributions, specification total/Previous | | | | N/A | N/A | N/A | * | xs:date('2017-01-01')/xs:date('2017-12-31') |
| r1.c0 | ocw-table_ExpensesReplacementFundContributionsSpecification-y/Replacement fund contributions | ocw-i:ReplacementFundContributions | nl-types:monetaryNoDecimalsItemType | duration | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:ExpensesSpecificationComponentMember | * | N/A |
| r1.c1 | ocw-table_ExpensesReplacementFundContributionsSpecification-y/Replacement fund contributions | ocw-i:ReplacementFundContributions | nl-types:monetaryNoDecimalsItemType | duration | jenv-bw2-dm:SeparateMember | ocw-dm:ActualsMember | ocw-dm:ExpensesSpecificationComponentMember | * | N/A |
| r1.c2 | ocw-table_ExpensesReplacementFundContributionsSpecification-y/Current | | | | N/A | N/A | N/A | * | xs:date('2018-01-01')/xs:date('2018-12-31') |
| r1.c3 | ocw-table_ExpensesReplacementFundContributionsSpecification-y/Previous | | | | N/A | N/A | N/A | * | xs:date('2017-01-01')/xs:date('2017-12-31') |