| r0.1 | label_boi_a2/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MU:x1 | boi_RP:x25 |
| r0.2 | label_boi_a2/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MU:x1 | boi_RP:x25 |
| 1.1 | Wages and related/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x499 | boi_MU:x1 | boi_RP:x25 |
| 1.2 | Wages and related/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x499 | boi_MU:x1 | boi_RP:x25 |
| 2.1 | Professional services/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x179 | boi_MU:x1 | boi_RP:x25 |
| 2.2 | Professional services/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x179 | boi_MU:x1 | boi_RP:x25 |
| 3.1 | Insurance/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x178 | boi_MU:x1 | boi_RP:x25 |
| 3.2 | Insurance/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x178 | boi_MU:x1 | boi_RP:x25 |
| 4.1 | Motor vehicle maintenance/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x504 | boi_MU:x1 | boi_RP:x25 |
| 4.2 | Motor vehicle maintenance/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x504 | boi_MU:x1 | boi_RP:x25 |
| 5.1 | Other/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x505 | boi_MU:x1 | boi_RP:x25 |
| 5.2 | Other/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x505 | boi_MU:x1 | boi_RP:x25 |
| 6.1 | Total administrative and general expenses/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x460 | boi_MU:x1 | boi_RP:x25 |
| 6.2 | Total administrative and general expenses/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x460 | boi_MU:x1 | boi_RP:x25 |
| 7.1 | Thereof: originating in share-based payment transactions/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x500 | boi_MU:x1 | boi_RP:x25 |
| 7.2 | Thereof: originating in share-based payment transactions/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x500 | boi_MU:x1 | boi_RP:x25 |
| 8.1 | Thereof: originating in share-based payments cleared by means of capital instruments/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_MC:x501 | boi_MU:x1 | boi_RP:x25 |
| 8.2 | Thereof: originating in share-based payments cleared by means of capital instruments/Company | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_MC:x501 | boi_MU:x1 | boi_RP:x25 |