| r0.1 | label_boi_a2/Buildings and real estate | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r0.2 | label_boi_a2/Equipment, furniture and vehicles | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r0.3 | label_boi_a2/Software cost | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r0.4 | label_boi_a2/Total | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r0.7 | label_boi_a2/Buildings and real estate | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r0.8 | label_boi_a2/Equipment, furniture and vehicles | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r0.9 | label_boi_a2/Software cost | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r0.10 | label_boi_a2/Total | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r1.1 | Cost/Buildings and real estate | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r1.2 | Cost/Equipment, furniture and vehicles | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r1.3 | Cost/Software cost | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r1.4 | Cost/Total | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r1.7 | Cost/Buildings and real estate | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r1.8 | Cost/Equipment, furniture and vehicles | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r1.9 | Cost/Software cost | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r1.10 | Cost/Total | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 1.1 | Balanced at the beginning of the year/Buildings and real estate | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.2 | Balanced at the beginning of the year/Equipment, furniture and vehicles | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.3 | Balanced at the beginning of the year/Software cost | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.4 | Balanced at the beginning of the year/Total | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.7 | Balanced at the beginning of the year/Buildings and real estate | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.8 | Balanced at the beginning of the year/Equipment, furniture and vehicles | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.9 | Balanced at the beginning of the year/Software cost | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.10 | Balanced at the beginning of the year/Total | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | boi_RP:x22 |
| 2.1 | Additions/Buildings and real estate | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.2 | Additions/Equipment, furniture and vehicles | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.3 | Additions/Software cost | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.4 | Additions/Total | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.7 | Additions/Buildings and real estate | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.8 | Additions/Equipment, furniture and vehicles | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.9 | Additions/Software cost | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.10 | Additions/Total | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.1 | Purchases in framework of business acquisition/Buildings and real estate | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.2 | Purchases in framework of business acquisition/Equipment, furniture and vehicles | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.3 | Purchases in framework of business acquisition/Software cost | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.4 | Purchases in framework of business acquisition/Total | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.7 | Purchases in framework of business acquisition/Buildings and real estate | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.8 | Purchases in framework of business acquisition/Equipment, furniture and vehicles | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.9 | Purchases in framework of business acquisition/Software cost | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.10 | Purchases in framework of business acquisition/Total | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.1 | Disposals/Buildings and real estate | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.2 | Disposals/Equipment, furniture and vehicles | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.3 | Disposals/Software cost | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.4 | Disposals/Total | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.7 | Disposals/Buildings and real estate | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.8 | Disposals/Equipment, furniture and vehicles | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.9 | Disposals/Software cost | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.10 | Disposals/Total | boi_met:md342 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.1 | Translation financial statements adjustment/Buildings and real estate | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.2 | Translation financial statements adjustment/Equipment, furniture and vehicles | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.3 | Translation financial statements adjustment/Software cost | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.4 | Translation financial statements adjustment/Total | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.7 | Translation financial statements adjustment/Buildings and real estate | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.8 | Translation financial statements adjustment/Equipment, furniture and vehicles | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.9 | Translation financial statements adjustment/Software cost | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.10 | Translation financial statements adjustment/Total | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.1 | Other/Buildings and real estate | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.2 | Other/Equipment, furniture and vehicles | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.3 | Other/Software cost | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.4 | Other/Total | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.7 | Other/Buildings and real estate | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.8 | Other/Equipment, furniture and vehicles | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.9 | Other/Software cost | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.10 | Other/Total | boi_met:md344 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 7.1 | Balance at balance sheet date/Buildings and real estate | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 7.2 | Balance at balance sheet date/Equipment, furniture and vehicles | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 7.3 | Balance at balance sheet date/Software cost | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 7.4 | Balance at balance sheet date/Total | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 7.7 | Balance at balance sheet date/Buildings and real estate | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 7.8 | Balance at balance sheet date/Equipment, furniture and vehicles | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 7.9 | Balance at balance sheet date/Software cost | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 7.10 | Balance at balance sheet date/Total | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 8.1 | Including capitalized costs of:/Buildings and real estate | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 8.2 | Including capitalized costs of:/Equipment, furniture and vehicles | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 8.3 | Including capitalized costs of:/Software cost | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 8.4 | Including capitalized costs of:/Total | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 8.7 | Including capitalized costs of:/Buildings and real estate | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 8.8 | Including capitalized costs of:/Equipment, furniture and vehicles | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 8.9 | Including capitalized costs of:/Software cost | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 8.10 | Including capitalized costs of:/Total | boi_met:mi345 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r10.1 | Depreciation and impairment losses/Buildings and real estate | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r10.2 | Depreciation and impairment losses/Equipment, furniture and vehicles | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r10.3 | Depreciation and impairment losses/Software cost | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r10.4 | Depreciation and impairment losses/Total | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r10.7 | Depreciation and impairment losses/Buildings and real estate | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r10.8 | Depreciation and impairment losses/Equipment, furniture and vehicles | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r10.9 | Depreciation and impairment losses/Software cost | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r10.10 | Depreciation and impairment losses/Total | | | | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 9.1 | Balanced at the beginning of the year/Buildings and real estate | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.2 | Balanced at the beginning of the year/Equipment, furniture and vehicles | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.3 | Balanced at the beginning of the year/Software cost | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.4 | Balanced at the beginning of the year/Total | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.7 | Balanced at the beginning of the year/Buildings and real estate | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.8 | Balanced at the beginning of the year/Equipment, furniture and vehicles | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.9 | Balanced at the beginning of the year/Software cost | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | boi_RP:x22 |
| 9.10 | Balanced at the beginning of the year/Total | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | boi_RP:x22 |
| 10.1 | Annual Depreciation/Buildings and real estate | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.2 | Annual Depreciation/Equipment, furniture and vehicles | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.3 | Annual Depreciation/Software cost | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.4 | Annual Depreciation/Total | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.7 | Annual Depreciation/Buildings and real estate | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.8 | Annual Depreciation/Equipment, furniture and vehicles | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.9 | Annual Depreciation/Software cost | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.10 | Annual Depreciation/Total | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.1 | Impairment loss/Buildings and real estate | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.2 | Impairment loss/Equipment, furniture and vehicles | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.3 | Impairment loss/Software cost | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.4 | Impairment loss/Total | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.7 | Impairment loss/Buildings and real estate | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.8 | Impairment loss/Equipment, furniture and vehicles | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.9 | Impairment loss/Software cost | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.10 | Impairment loss/Total | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.1 | Disposals/Buildings and real estate | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.2 | Disposals/Equipment, furniture and vehicles | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.3 | Disposals/Software cost | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.4 | Disposals/Total | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.7 | Disposals/Buildings and real estate | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.8 | Disposals/Equipment, furniture and vehicles | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.9 | Disposals/Software cost | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.10 | Disposals/Total | boi_met:md350 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.1 | Translation financial statements adjustment/Buildings and real estate | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.2 | Translation financial statements adjustment/Equipment, furniture and vehicles | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.3 | Translation financial statements adjustment/Software cost | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.4 | Translation financial statements adjustment/Total | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.7 | Translation financial statements adjustment/Buildings and real estate | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.8 | Translation financial statements adjustment/Equipment, furniture and vehicles | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.9 | Translation financial statements adjustment/Software cost | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.10 | Translation financial statements adjustment/Total | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.1 | Other/Buildings and real estate | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.2 | Other/Equipment, furniture and vehicles | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.3 | Other/Software cost | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.4 | Other/Total | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.7 | Other/Buildings and real estate | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.8 | Other/Equipment, furniture and vehicles | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.9 | Other/Software cost | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 14.10 | Other/Total | boi_met:md352 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 15.1 | Balance sheet date/Buildings and real estate | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 15.2 | Balance sheet date/Equipment, furniture and vehicles | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 15.3 | Balance sheet date/Software cost | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 15.4 | Balance sheet date/Total | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 15.7 | Balance sheet date/Buildings and real estate | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 15.8 | Balance sheet date/Equipment, furniture and vehicles | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 15.9 | Balance sheet date/Software cost | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 15.10 | Balance sheet date/Total | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r18.1 | Book value/Buildings and real estate | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r18.2 | Book value/Equipment, furniture and vehicles | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r18.3 | Book value/Software cost | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r18.4 | Book value/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| r18.7 | Book value/Buildings and real estate | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| r18.8 | Book value/Equipment, furniture and vehicles | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| r18.9 | Book value/Software cost | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| r18.10 | Book value/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 16.1 | Balance at the beginning of the year/Buildings and real estate | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.2 | Balance at the beginning of the year/Equipment, furniture and vehicles | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.3 | Balance at the beginning of the year/Software cost | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.4 | Balance at the beginning of the year/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.7 | Balance at the beginning of the year/Buildings and real estate | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.8 | Balance at the beginning of the year/Equipment, furniture and vehicles | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.9 | Balance at the beginning of the year/Software cost | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | boi_RP:x22 |
| 16.10 | Balance at the beginning of the year/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | boi_RP:x22 |
| 17.1 | Balance sheet date/Buildings and real estate | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 17.2 | Balance sheet date/Equipment, furniture and vehicles | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 17.3 | Balance sheet date/Software cost | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 17.4 | Balance sheet date/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 17.7 | Balance sheet date/Buildings and real estate | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | N/A | boi_RP:x24 | N/A |
| 17.8 | Balance sheet date/Equipment, furniture and vehicles | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | N/A | boi_RP:x24 | N/A |
| 17.9 | Balance sheet date/Software cost | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | N/A | boi_RP:x24 | N/A |
| 17.10 | Balance sheet date/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | N/A | boi_RP:x24 | N/A |
| 18.1 | Weighted average depreciation rate for the year/Buildings and real estate | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.2 | Weighted average depreciation rate for the year/Equipment, furniture and vehicles | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.3 | Weighted average depreciation rate for the year/Software cost | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.4 | Weighted average depreciation rate for the year/Total | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.7 | Weighted average depreciation rate for the year/Buildings and real estate | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x653 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.8 | Weighted average depreciation rate for the year/Equipment, furniture and vehicles | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x652 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.9 | Weighted average depreciation rate for the year/Software cost | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x651 | boi_MU:x1 | boi_RP:x24 | N/A |
| 18.10 | Weighted average depreciation rate for the year/Total | boi_met:md353 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x3 | boi_MC:x6 | boi_MU:x1 | boi_RP:x24 | N/A |