| r0.1 | label_boi_a2/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| r0.2 | label_boi_a2/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | 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_MC:x8 | 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_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| r0.5 | label_boi_a2/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| r0.6 | label_boi_a2/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | 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_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| r1.1 | Activity of borrowers in Israel/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| r1.2 | Activity of borrowers in Israel/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| r1.3 | Activity of borrowers in Israel/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| r1.4 | Activity of borrowers in Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| r1.5 | Activity of borrowers in Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| r1.6 | Activity of borrowers in Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| r1.99 | Activity of borrowers in Israel/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| 1.1 | Construction and real estate - construction/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x1 | N/A |
| 1.2 | Construction and real estate - construction/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x4 | N/A |
| 1.3 | Construction and real estate - construction/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x3 | N/A |
| 1.4 | Construction and real estate - construction/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | N/A | N/A |
| 1.5 | Construction and real estate - construction/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x4 | boi_TI:x2 |
| 1.6 | Construction and real estate - construction/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x18 | boi_TI:x1 |
| 1.99 | Construction and real estate - construction/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x4 | boi_TI:x1 |
| 2.1 | Construction and real estate - real estate activity/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x1 | N/A |
| 2.2 | Construction and real estate - real estate activity/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x4 | N/A |
| 2.3 | Construction and real estate - real estate activity/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x3 | N/A |
| 2.4 | Construction and real estate - real estate activity/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | N/A | N/A |
| 2.5 | Construction and real estate - real estate activity/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x4 | boi_TI:x2 |
| 2.6 | Construction and real estate - real estate activity/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x18 | boi_TI:x1 |
| 2.99 | Construction and real estate - real estate activity/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x4 | boi_TI:x1 |
| 3.1 | Financial services/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x1 | N/A |
| 3.2 | Financial services/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x4 | N/A |
| 3.3 | Financial services/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x3 | N/A |
| 3.4 | Financial services/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | N/A | N/A |
| 3.5 | Financial services/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x4 | boi_TI:x2 |
| 3.6 | Financial services/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x18 | boi_TI:x1 |
| 3.99 | Financial services/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x4 | boi_TI:x1 |
| 4.1 | Other - commercial/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | boi_ST:x1 | N/A |
| 4.2 | Other - commercial/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | boi_ST:x4 | N/A |
| 4.3 | Other - commercial/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | boi_ST:x3 | N/A |
| 4.4 | Other - commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | N/A | N/A |
| 4.5 | Other - commercial/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | boi_ST:x4 | boi_TI:x2 |
| 4.6 | Other - commercial/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | boi_ST:x18 | boi_TI:x1 |
| 4.99 | Other - commercial/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | boi_ST:x4 | boi_TI:x1 |
| 5.1 | Total commercial/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x1 | N/A |
| 5.2 | Total commercial/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | N/A |
| 5.3 | Total commercial/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x3 | N/A |
| 5.4 | Total commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | N/A | N/A |
| 5.5 | Total commercial/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x2 |
| 5.6 | Total commercial/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x18 | boi_TI:x1 |
| 5.99 | Total commercial/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x1 |
| 6.1 | Private individuals - housing loans/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x1 | N/A |
| 6.2 | Private individuals - housing loans/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | N/A |
| 6.3 | Private individuals - housing loans/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x3 | N/A |
| 6.4 | Private individuals - housing loans/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | N/A | N/A |
| 6.5 | Private individuals - housing loans/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x2 |
| 6.6 | Private individuals - housing loans/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x18 | boi_TI:x1 |
| 6.99 | Private individuals - housing loans/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x1 |
| 7.1 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | boi_ST:x1 | N/A |
| 7.2 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | boi_ST:x4 | N/A |
| 7.3 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | boi_ST:x3 | N/A |
| 7.4 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | N/A | N/A |
| 7.5 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | boi_ST:x4 | boi_TI:x2 |
| 7.6 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | boi_ST:x18 | boi_TI:x1 |
| 7.99 | of which: with the provision in accordance with the agreement for the repayment of arrears and change in table/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x27 | boi_ST:x4 | boi_TI:x1 |
| 8.1 | Private individuals - other/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x1 | N/A |
| 8.2 | Private individuals - other/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | N/A |
| 8.3 | Private individuals - other/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x3 | N/A |
| 8.4 | Private individuals - other/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | N/A | N/A |
| 8.5 | Private individuals - other/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x2 |
| 8.6 | Private individuals - other/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x18 | boi_TI:x1 |
| 8.99 | Private individuals - other/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x1 |
| 9.1 | Total public activity in Israel/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x1 | N/A |
| 9.2 | Total public activity in Israel/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | N/A |
| 9.3 | Total public activity in Israel/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x3 | N/A |
| 9.4 | Total public activity in Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | N/A | N/A |
| 9.5 | Total public activity in Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | boi_TI:x2 |
| 9.6 | Total public activity in Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x18 | boi_TI:x1 |
| 9.99 | Total public activity in Israel/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | boi_TI:x1 |
| 10.1 | Banks in Israel/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x1 | N/A |
| 10.2 | Banks in Israel/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | N/A |
| 10.3 | Banks in Israel/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x3 | N/A |
| 10.4 | Banks in Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | N/A | N/A |
| 10.5 | Banks in Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | boi_TI:x2 |
| 10.6 | Banks in Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x18 | boi_TI:x1 |
| 10.99 | Banks in Israel/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | boi_TI:x1 |
| 11.1 | Government of Israel/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x1 | N/A |
| 11.2 | Government of Israel/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | N/A |
| 11.3 | Government of Israel/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x3 | N/A |
| 11.4 | Government of Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | N/A | N/A |
| 11.5 | Government of Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | boi_TI:x2 |
| 11.6 | Government of Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x18 | boi_TI:x1 |
| 11.99 | Government of Israel/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | boi_TI:x1 |
| 12.1 | Total activity in Israel/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| 12.2 | Total activity in Israel/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| 12.3 | Total activity in Israel/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| 12.4 | Total activity in Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| 12.5 | Total activity in Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| 12.6 | Total activity in Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| 12.99 | Total activity in Israel/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| r14.1 | Borrowers activity abroad/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| r14.2 | Borrowers activity abroad/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| r14.3 | Borrowers activity abroad/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| r14.4 | Borrowers activity abroad/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| r14.5 | Borrowers activity abroad/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| r14.6 | Borrowers activity abroad/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| r14.99 | Borrowers activity abroad/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| 13.1 | Construction and real estate - construction/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x1 | N/A |
| 13.2 | Construction and real estate - construction/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x4 | N/A |
| 13.3 | Construction and real estate - construction/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x3 | N/A |
| 13.4 | Construction and real estate - construction/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | N/A | N/A |
| 13.5 | Construction and real estate - construction/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x4 | boi_TI:x2 |
| 13.6 | Construction and real estate - construction/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x18 | boi_TI:x1 |
| 13.99 | Construction and real estate - construction/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x4 | boi_TI:x1 |
| 14.1 | Other - commercial/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | boi_ST:x1 | N/A |
| 14.2 | Other - commercial/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | boi_ST:x4 | N/A |
| 14.3 | Other - commercial/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | boi_ST:x3 | N/A |
| 14.4 | Other - commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | N/A | N/A |
| 14.5 | Other - commercial/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | boi_ST:x4 | boi_TI:x2 |
| 14.6 | Other - commercial/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | boi_ST:x18 | boi_TI:x1 |
| 14.99 | Other - commercial/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x6 | N/A | boi_ST:x4 | boi_TI:x1 |
| 15.1 | Total commercial/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x1 | N/A |
| 15.2 | Total commercial/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | N/A |
| 15.3 | Total commercial/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x3 | N/A |
| 15.4 | Total commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | N/A | N/A |
| 15.5 | Total commercial/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x2 |
| 15.6 | Total commercial/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x18 | boi_TI:x1 |
| 15.99 | Total commercial/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x4 | boi_TI:x1 |
| 16.1 | Private individuals/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x1 | N/A |
| 16.2 | Private individuals/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | N/A |
| 16.3 | Private individuals/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x3 | N/A |
| 16.4 | Private individuals/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | N/A | N/A |
| 16.5 | Private individuals/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x2 |
| 16.6 | Private individuals/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x18 | boi_TI:x1 |
| 16.99 | Private individuals/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x4 | boi_TI:x1 |
| 17.1 | Total public activity abroad/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x1 | N/A |
| 17.2 | Total public activity abroad/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | N/A |
| 17.3 | Total public activity abroad/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x3 | N/A |
| 17.4 | Total public activity abroad/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | N/A | N/A |
| 17.5 | Total public activity abroad/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | boi_TI:x2 |
| 17.6 | Total public activity abroad/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x18 | boi_TI:x1 |
| 17.99 | Total public activity abroad/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | boi_TI:x1 |
| 18.1 | Banks abroad/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x1 | N/A |
| 18.2 | Banks abroad/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | N/A |
| 18.3 | Banks abroad/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x3 | N/A |
| 18.4 | Banks abroad/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | N/A | N/A |
| 18.5 | Banks abroad/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | boi_TI:x2 |
| 18.6 | Banks abroad/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x18 | boi_TI:x1 |
| 18.99 | Banks abroad/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | boi_TI:x1 |
| 19.1 | Foreign government/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x1 | N/A |
| 19.2 | Foreign government/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | N/A |
| 19.3 | Foreign government/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x3 | N/A |
| 19.4 | Foreign government/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | N/A | N/A |
| 19.5 | Foreign government/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | boi_TI:x2 |
| 19.6 | Foreign government/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x18 | boi_TI:x1 |
| 19.99 | Foreign government/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | boi_TI:x1 |
| 20.1 | Total activity abroad/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| 20.2 | Total activity abroad/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| 20.3 | Total activity abroad/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| 20.4 | Total activity abroad/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| 20.5 | Total activity abroad/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| 20.6 | Total activity abroad/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| 20.99 | Total activity abroad/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |
| 21.1 | Total public/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x1 | N/A |
| 21.2 | Total public/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | N/A |
| 21.3 | Total public/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x3 | N/A |
| 21.4 | Total public/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | N/A | N/A |
| 21.5 | Total public/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | boi_TI:x2 |
| 21.6 | Total public/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x18 | boi_TI:x1 |
| 21.99 | Total public/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x4 | boi_TI:x1 |
| 22.1 | Total banks/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x1 | N/A |
| 22.2 | Total banks/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | N/A |
| 22.3 | Total banks/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x3 | N/A |
| 22.4 | Total banks/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | N/A | N/A |
| 22.5 | Total banks/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | boi_TI:x2 |
| 22.6 | Total banks/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x18 | boi_TI:x1 |
| 22.99 | Total banks/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x1 | N/A | boi_ST:x4 | boi_TI:x1 |
| 23.1 | Total governments/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x1 | N/A |
| 23.2 | Total governments/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | N/A |
| 23.3 | Total governments/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x3 | N/A |
| 23.4 | Total governments/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | N/A | N/A |
| 23.5 | Total governments/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | boi_TI:x2 |
| 23.6 | Total governments/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x18 | boi_TI:x1 |
| 23.99 | Total governments/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x11 | N/A | boi_ST:x4 | boi_TI:x1 |
| 24.1 | Total/Non problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x1 | N/A |
| 24.2 | Total/Not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | N/A |
| 24.3 | Total/Impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x3 | N/A |
| 24.4 | Total/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A | N/A |
| 24.5 | Total/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x2 |
| 24.6 | Total/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x18 | boi_TI:x1 |
| 24.99 | Total/Of which: Problem debts - not impaired | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | boi_ST:x4 | boi_TI:x1 |