| r0.c0 | Total policy value/First forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r0.c1 | Total policy value/Second forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r0.c2 | Total policy value/Third forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r0.c3 | Total policy value/Fourth forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r0.c4 | Total policy value/Fifth forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c0 | Policy value of new buildings excluding purpose sale/First forecast year | bzk-ww-i:NewBuildingsExcludingPurposeSalePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c1 | Policy value of new buildings excluding purpose sale/Second forecast year | bzk-ww-i:NewBuildingsExcludingPurposeSalePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c2 | Policy value of new buildings excluding purpose sale/Third forecast year | bzk-ww-i:NewBuildingsExcludingPurposeSalePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c3 | Policy value of new buildings excluding purpose sale/Fourth forecast year | bzk-ww-i:NewBuildingsExcludingPurposeSalePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r1.c4 | Policy value of new buildings excluding purpose sale/Fifth forecast year | bzk-ww-i:NewBuildingsExcludingPurposeSalePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c0 | Policy value of purchase/First forecast year | bzk-ww-i:PurchasePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c1 | Policy value of purchase/Second forecast year | bzk-ww-i:PurchasePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c2 | Policy value of purchase/Third forecast year | bzk-ww-i:PurchasePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c3 | Policy value of purchase/Fourth forecast year | bzk-ww-i:PurchasePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r2.c4 | Policy value of purchase/Fifth forecast year | bzk-ww-i:PurchasePolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c0 | Policy value of sale to future residents/First forecast year | bzk-ww-i:SaleToFutureResidentsPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c1 | Policy value of sale to future residents/Second forecast year | bzk-ww-i:SaleToFutureResidentsPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c2 | Policy value of sale to future residents/Third forecast year | bzk-ww-i:SaleToFutureResidentsPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c3 | Policy value of sale to future residents/Fourth forecast year | bzk-ww-i:SaleToFutureResidentsPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r3.c4 | Policy value of sale to future residents/Fifth forecast year | bzk-ww-i:SaleToFutureResidentsPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c0 | Policy value of sale to other parties/First forecast year | bzk-ww-i:SaleToOtherPartiesPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c1 | Policy value of sale to other parties/Second forecast year | bzk-ww-i:SaleToOtherPartiesPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c2 | Policy value of sale to other parties/Third forecast year | bzk-ww-i:SaleToOtherPartiesPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c3 | Policy value of sale to other parties/Fourth forecast year | bzk-ww-i:SaleToOtherPartiesPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r4.c4 | Policy value of sale to other parties/Fifth forecast year | bzk-ww-i:SaleToOtherPartiesPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c0 | Policy value of demolition/First forecast year | bzk-ww-i:DemolitionPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c1 | Policy value of demolition/Second forecast year | bzk-ww-i:DemolitionPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c2 | Policy value of demolition/Third forecast year | bzk-ww-i:DemolitionPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c3 | Policy value of demolition/Fourth forecast year | bzk-ww-i:DemolitionPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r5.c4 | Policy value of demolition/Fifth forecast year | bzk-ww-i:DemolitionPolicyValue | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c0 | Policy value mutation of improvement existing property/First forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c1 | Policy value mutation of improvement existing property/Second forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c2 | Policy value mutation of improvement existing property/Third forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c3 | Policy value mutation of improvement existing property/Fourth forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r6.c4 | Policy value mutation of improvement existing property/Fifth forecast year | bzk-ww-i:ImprovementExistingPropertyPolicyValueMutation | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c0 | Policy value autonomous movement/First forecast year | bzk-ww-i:AutonomousPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c1 | Policy value autonomous movement/Second forecast year | bzk-ww-i:AutonomousPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c2 | Policy value autonomous movement/Third forecast year | bzk-ww-i:AutonomousPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c3 | Policy value autonomous movement/Fourth forecast year | bzk-ww-i:AutonomousPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r7.c4 | Policy value autonomous movement/Fifth forecast year | bzk-ww-i:AutonomousPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | duration | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c0 | Total policy value/First forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c1 | Total policy value/Second forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c2 | Total policy value/Third forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c3 | Total policy value/Fourth forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |
| r8.c4 | Total policy value/Fifth forecast year | bzk-dpi-i:TotalPolicyValueMovement | nl-types:monetaryNoDecimals20ItemType | instant | $BasisOfPreparationParam | jenv-bw2-dm:ConsolidatedMember |