| r0.1 | label_boi_a2/Goodwill | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | N/A |
| r0.2 | label_boi_a2/Customer relations | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | N/A |
| r0.3 | label_boi_a2/Service assets | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | N/A |
| r0.4 | label_boi_a2/Trade marks | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | N/A |
| r0.5 | label_boi_a2/Other | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | N/A |
| r0.6 | label_boi_a2/Total | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | N/A |
| r1.1 | Cost/Goodwill | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | N/A |
| r1.2 | Cost/Customer relations | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | N/A |
| r1.3 | Cost/Service assets | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | N/A |
| r1.4 | Cost/Trade marks | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | N/A |
| r1.5 | Cost/Other | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | N/A |
| r1.6 | Cost/Total | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | N/A |
| 1.1 | balanced as of the beginning of the year/Goodwill | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.2 | balanced as of the beginning of the year/Customer relations | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.3 | balanced as of the beginning of the year/Service assets | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.4 | balanced as of the beginning of the year/Trade marks | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.5 | balanced as of the beginning of the year/Other | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | boi_RP:x22 |
| 1.6 | balanced as of the beginning of the year/Total | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | boi_RP:x22 |
| 2.1 | Additions/Goodwill | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.2 | Additions/Customer relations | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.3 | Additions/Service assets | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.4 | Additions/Trade marks | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.5 | Additions/Other | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 2.6 | Additions/Total | boi_met:md340 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.1 | Purchases from business mergers/Goodwill | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.2 | Purchases from business mergers/Customer relations | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.3 | Purchases from business mergers/Service assets | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.4 | Purchases from business mergers/Trade marks | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.5 | Purchases from business mergers/Other | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 3.6 | Purchases from business mergers/Total | boi_met:md341 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.1 | Translation financial statements adjustment/Goodwill | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.2 | Translation financial statements adjustment/Customer relations | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.3 | Translation financial statements adjustment/Service assets | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.4 | Translation financial statements adjustment/Trade marks | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.5 | Translation financial statements adjustment/Other | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 4.6 | Translation financial statements adjustment/Total | boi_met:md343 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.1 | Other/Goodwill | boi_met:md359 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.2 | Other/Customer relations | boi_met:md359 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.3 | Other/Service assets | boi_met:md359 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.4 | Other/Trade marks | boi_met:md359 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.5 | Other/Other | boi_met:md359 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 5.6 | Other/Total | boi_met:md359 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 6.1 | As of the end of the year/Goodwill | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | N/A |
| 6.2 | As of the end of the year/Customer relations | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | N/A |
| 6.3 | As of the end of the year/Service assets | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | N/A |
| 6.4 | As of the end of the year/Trade marks | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | N/A |
| 6.5 | As of the end of the year/Other | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | N/A |
| 6.6 | As of the end of the year/Total | boi_met:mi339 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | N/A |
| r8.1 | Amortization and losses/Goodwill | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | N/A |
| r8.2 | Amortization and losses/Customer relations | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | N/A |
| r8.3 | Amortization and losses/Service assets | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | N/A |
| r8.4 | Amortization and losses/Trade marks | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | N/A |
| r8.5 | Amortization and losses/Other | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | N/A |
| r8.6 | Amortization and losses/Total | | | | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | N/A |
| 7.1 | As of the beginning of the year/Goodwill | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | boi_RP:x22 |
| 7.2 | As of the beginning of the year/Customer relations | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | boi_RP:x22 |
| 7.3 | As of the beginning of the year/Service assets | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | boi_RP:x22 |
| 7.4 | As of the beginning of the year/Trade marks | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | boi_RP:x22 |
| 7.5 | As of the beginning of the year/Other | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | boi_RP:x22 |
| 7.6 | As of the beginning of the year/Total | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | boi_RP:x22 |
| 8.1 | Current year deductions/Goodwill | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 8.2 | Current year deductions/Customer relations | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 8.3 | Current year deductions/Service assets | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 8.4 | Current year deductions/Trade marks | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 8.5 | Current year deductions/Other | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 8.6 | Current year deductions/Total | boi_met:md347 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 9.1 | Losses from impairment/Goodwill | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 9.2 | Losses from impairment/Customer relations | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 9.3 | Losses from impairment/Service assets | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 9.4 | Losses from impairment/Trade marks | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 9.5 | Losses from impairment/Other | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 9.6 | Losses from impairment/Total | boi_met:md348 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.1 | Cancellation of losses from impairment/Goodwill | boi_met:md349 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.2 | Cancellation of losses from impairment/Customer relations | boi_met:md349 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.3 | Cancellation of losses from impairment/Service assets | boi_met:md349 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.4 | Cancellation of losses from impairment/Trade marks | boi_met:md349 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.5 | Cancellation of losses from impairment/Other | boi_met:md349 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 10.6 | Cancellation of losses from impairment/Total | boi_met:md349 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.1 | Translation financial statements adjustment/Goodwill | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.2 | Translation financial statements adjustment/Customer relations | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.3 | Translation financial statements adjustment/Service assets | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.4 | Translation financial statements adjustment/Trade marks | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.5 | Translation financial statements adjustment/Other | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 11.6 | Translation financial statements adjustment/Total | boi_met:md351 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.1 | Other/Goodwill | boi_met:md360 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.2 | Other/Customer relations | boi_met:md360 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.3 | Other/Service assets | boi_met:md360 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.4 | Other/Trade marks | boi_met:md360 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.5 | Other/Other | boi_met:md360 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | boi_MU:x1 | boi_RP:x24 | N/A |
| 12.6 | Other/Total | boi_met:md360 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | boi_MU:x1 | boi_RP:x24 | N/A |
| 13.1 | As at the end of the year/Goodwill | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | N/A |
| 13.2 | As at the end of the year/Customer relations | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | N/A |
| 13.3 | As at the end of the year/Service assets | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | N/A |
| 13.4 | As at the end of the year/Trade marks | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | N/A |
| 13.5 | As at the end of the year/Other | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | N/A |
| 13.6 | As at the end of the year/Total | boi_met:mi346 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | N/A |
| 14.1 | Balance after depreciation as of the beginning of the year/Goodwill | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | boi_RP:x22 |
| 14.2 | Balance after depreciation as of the beginning of the year/Customer relations | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | boi_RP:x22 |
| 14.3 | Balance after depreciation as of the beginning of the year/Service assets | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | boi_RP:x22 |
| 14.4 | Balance after depreciation as of the beginning of the year/Trade marks | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | boi_RP:x22 |
| 14.5 | Balance after depreciation as of the beginning of the year/Other | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | boi_RP:x22 |
| 14.6 | Balance after depreciation as of the beginning of the year/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | boi_RP:x22 |
| 15.1 | Balance after depreciation as of the end of the year/Goodwill | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x837 | N/A | boi_RP:x24 | N/A |
| 15.2 | Balance after depreciation as of the end of the year/Customer relations | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x836 | N/A | boi_RP:x24 | N/A |
| 15.3 | Balance after depreciation as of the end of the year/Service assets | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x835 | N/A | boi_RP:x24 | N/A |
| 15.4 | Balance after depreciation as of the end of the year/Trade marks | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x834 | N/A | boi_RP:x24 | N/A |
| 15.5 | Balance after depreciation as of the end of the year/Other | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x838 | N/A | boi_RP:x24 | N/A |
| 15.6 | Balance after depreciation as of the end of the year/Total | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_MC:x19 | N/A | boi_RP:x24 | N/A |