| r0.1 | label_boi_a2/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x5 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| r0.2 | label_boi_a2/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x5 | boi_MC:x160 | N/A | boi_RP:x25 |
| r0.3 | label_boi_a2/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x19 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| r0.4 | label_boi_a2/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x19 | boi_MC:x160 | N/A | boi_RP:x25 |
| r0.5 | label_boi_a2/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x3 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| r0.6 | label_boi_a2/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x3 | boi_MC:x160 | N/A | boi_RP:x25 |
| r0.7 | label_boi_a2/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x21 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| r0.8 | label_boi_a2/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_IP:x21 | boi_MC:x160 | N/A | boi_RP:x25 |
| 1.1 | Interest party employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x5 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 1.2 | Interest party employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x5 | boi_MC:x160 | N/A | boi_RP:x25 |
| 1.3 | Interest party employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x19 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 1.4 | Interest party employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x19 | boi_MC:x160 | N/A | boi_RP:x25 |
| 1.5 | Interest party employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x3 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 1.6 | Interest party employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x3 | boi_MC:x160 | N/A | boi_RP:x25 |
| 1.7 | Interest party employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x21 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 1.8 | Interest party employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x13 | boi_IP:x21 | boi_MC:x160 | N/A | boi_RP:x25 |
| 2.1 | Director not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x5 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 2.2 | Director not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x5 | boi_MC:x160 | N/A | boi_RP:x25 |
| 2.3 | Director not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x19 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 2.4 | Director not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x19 | boi_MC:x160 | N/A | boi_RP:x25 |
| 2.5 | Director not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x3 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 2.6 | Director not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x3 | boi_MC:x160 | N/A | boi_RP:x25 |
| 2.7 | Director not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x21 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 2.8 | Director not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x14 | boi_IP:x21 | boi_MC:x160 | N/A | boi_RP:x25 |
| 3.1 | Other interest party not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x5 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 3.2 | Other interest party not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x5 | boi_MC:x160 | N/A | boi_RP:x25 |
| 3.3 | Other interest party not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x19 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 3.4 | Other interest party not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x19 | boi_MC:x160 | N/A | boi_RP:x25 |
| 3.5 | Other interest party not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x3 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 3.6 | Other interest party not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x3 | boi_MC:x160 | N/A | boi_RP:x25 |
| 3.7 | Other interest party not employed by or on behalf of corporation/Total benefit | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x21 | boi_MC:x160 | boi_MU:x1 | boi_RP:x25 |
| 3.8 | Other interest party not employed by or on behalf of corporation/No. of beneficiaries | boi_met:ii282 | xbrli:integerItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_IP:x15 | boi_IP:x21 | boi_MC:x160 | N/A | boi_RP:x25 |