| r0.1 | label_boi_a2/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| r0.2 | label_boi_a2/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| r0.3 | label_boi_a2/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| r0.4 | label_boi_a2/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | N/A | N/A |
| r0.5 | label_boi_a2/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| r0.6 | label_boi_a2/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| r0.99 | label_boi_a2/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| r1.1 | Debts not guaranteed by banks/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| r1.2 | Debts not guaranteed by banks/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| r1.3 | Debts not guaranteed by banks/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| r1.4 | Debts not guaranteed by banks/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | N/A | N/A |
| r1.5 | Debts not guaranteed by banks/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| r1.6 | Debts not guaranteed by banks/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| r1.99 | Debts not guaranteed by banks/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| r2.1 | Private individuals/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x1 | N/A |
| r2.2 | Private individuals/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | N/A |
| r2.3 | Private individuals/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x3 | N/A |
| r2.4 | Private individuals/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | N/A | N/A |
| r2.5 | Private individuals/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x2 |
| r2.6 | Private individuals/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x18 | boi_TI:x1 |
| r2.99 | Private individuals/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x1 |
| 1.1 | Receivables in respect of credit cards/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x1 | N/A |
| 1.2 | Receivables in respect of credit cards/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | N/A |
| 1.3 | Receivables in respect of credit cards/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x3 | N/A |
| 1.4 | Receivables in respect of credit cards/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | N/A | N/A |
| 1.5 | Receivables in respect of credit cards/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x2 |
| 1.6 | Receivables in respect of credit cards/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x18 | boi_TI:x1 |
| 1.99 | Receivables in respect of credit cards/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x1 |
| 2.1 | Credit 6/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x1 | N/A |
| 2.2 | Credit 6/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | N/A |
| 2.3 | Credit 6/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x3 | N/A |
| 2.4 | Credit 6/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | N/A | N/A |
| 2.5 | Credit 6/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x2 |
| 2.6 | Credit 6/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x18 | boi_TI:x1 |
| 2.99 | Credit 6/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x1 |
| r5.1 | Commercial/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x1 | N/A |
| r5.2 | Commercial/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | N/A |
| r5.3 | Commercial/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x3 | N/A |
| r5.4 | Commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | N/A | N/A |
| r5.5 | Commercial/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x2 |
| r5.6 | Commercial/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x18 | boi_TI:x1 |
| r5.99 | Commercial/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x1 |
| 3.1 | Receivables in respect of credit cards/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x1 | N/A |
| 3.2 | Receivables in respect of credit cards/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | N/A |
| 3.3 | Receivables in respect of credit cards/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x3 | N/A |
| 3.4 | Receivables in respect of credit cards/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | N/A | N/A |
| 3.5 | Receivables in respect of credit cards/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x2 |
| 3.6 | Receivables in respect of credit cards/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x18 | boi_TI:x1 |
| 3.99 | Receivables in respect of credit cards/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x143 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x1 |
| 4.1 | Credit 6/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x1 | N/A |
| 4.2 | Credit 6/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | N/A |
| 4.3 | Credit 6/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x3 | N/A |
| 4.4 | Credit 6/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | N/A | N/A |
| 4.5 | Credit 6/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x2 |
| 4.6 | Credit 6/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x18 | boi_TI:x1 |
| 4.99 | Credit 6/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x880 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x1 |
| 5.1 | Total debts not guaranteed by banks/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| 5.2 | Total debts not guaranteed by banks/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| 5.3 | Total debts not guaranteed by banks/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| 5.4 | Total debts not guaranteed by banks/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| 5.5 | Total debts not guaranteed by banks/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| 5.6 | Total debts not guaranteed by banks/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| 5.99 | Total debts not guaranteed by banks/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x2 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| 6.1 | Debts guaranteed by banks and others 8/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| 6.2 | Debts guaranteed by banks and others 8/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| 6.3 | Debts guaranteed by banks and others 8/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| 6.4 | Debts guaranteed by banks and others 8/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| 6.5 | Debts guaranteed by banks and others 8/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| 6.6 | Debts guaranteed by banks and others 8/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| 6.99 | Debts guaranteed by banks and others 8/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x40 | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| 7.1 | Total/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| 7.2 | Total/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| 7.3 | Total/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| 7.4 | Total/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| 7.5 | Total/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| 7.6 | Total/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| 7.99 | Total/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| 8.1 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | boi_ST:x1 | N/A |
| 8.2 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Non-impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | boi_ST:x4 | N/A |
| 8.3 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | boi_ST:x3 | N/A |
| 8.4 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | N/A | N/A |
| 8.5 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Non-impaired debts In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | boi_ST:x4 | boi_TI:x2 |
| 8.6 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Non-impaired debts In arrears of to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | boi_ST:x18 | boi_TI:x1 |
| 8.99 | Of which: Debts whose credit rating at report date matches credit rating for extension of new credit according to credit card company's policy/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x32 | boi_ST:x4 | boi_TI:x1 |