| r0.1 | label_boi_a2/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | N/A | N/A |
| r0.2 | label_boi_a2/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | N/A | N/A |
| r0.3 | label_boi_a2/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | N/A | boi_RP:x24 |
| r0.4 | label_boi_a2/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | N/A | boi_RP:x24 |
| r1.1 | Bonds and subordinated capital notes non-convertible into shares/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x600 | N/A |
| r1.2 | Bonds and subordinated capital notes non-convertible into shares/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x600 | N/A |
| r1.3 | Bonds and subordinated capital notes non-convertible into shares/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x600 | boi_RP:x24 |
| r1.4 | Bonds and subordinated capital notes non-convertible into shares/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x600 | boi_RP:x24 |
| 1.1 | Non-indexed NIS/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x600 | N/A |
| 1.2 | Non-indexed NIS/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x600 | N/A |
| 1.3 | Non-indexed NIS/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x600 | boi_RP:x24 |
| 1.4 | Non-indexed NIS/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x5 | boi_MC:x600 | boi_RP:x24 |
| 2.1 | CPI-indexed NIS/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x600 | N/A |
| 2.2 | CPI-indexed NIS/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x600 | N/A |
| 2.3 | CPI-indexed NIS/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x600 | boi_RP:x24 |
| 2.4 | CPI-indexed NIS/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x6 | boi_MC:x600 | boi_RP:x24 |
| 3.1 | Foreign Currency -indexed NIS/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x600 | N/A |
| 3.2 | Foreign Currency -indexed NIS/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x600 | N/A |
| 3.3 | Foreign Currency -indexed NIS/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x600 | boi_RP:x24 |
| 3.4 | Foreign Currency -indexed NIS/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x12 | boi_MC:x600 | boi_RP:x24 |
| 4.1 | USD/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x600 | N/A |
| 4.2 | USD/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x600 | N/A |
| 4.3 | USD/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x600 | boi_RP:x24 |
| 4.4 | USD/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x2 | boi_MC:x600 | boi_RP:x24 |
| 5.1 | Other foreign currency/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x600 | N/A |
| 5.2 | Other foreign currency/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x600 | N/A |
| 5.3 | Other foreign currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x600 | boi_RP:x24 |
| 5.4 | Other foreign currency/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x32 | boi_MC:x600 | boi_RP:x24 |
| r7.1 | Bonds and subordinated capital notes convertible into shares/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x599 | N/A |
| r7.2 | Bonds and subordinated capital notes convertible into shares/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x599 | N/A |
| r7.3 | Bonds and subordinated capital notes convertible into shares/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x599 | boi_RP:x24 |
| r7.4 | Bonds and subordinated capital notes convertible into shares/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x599 | boi_RP:x24 |
| 6.1 | Non-indexed NIS/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x599 | N/A |
| 6.2 | Non-indexed NIS/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x599 | N/A |
| 6.3 | Non-indexed NIS/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x599 | boi_RP:x24 |
| 6.4 | Non-indexed NIS/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x5 | boi_MC:x599 | boi_RP:x24 |
| 7.1 | CPI-indexed NIS/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x599 | N/A |
| 7.2 | CPI-indexed NIS/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x599 | N/A |
| 7.3 | CPI-indexed NIS/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x599 | boi_RP:x24 |
| 7.4 | CPI-indexed NIS/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x6 | boi_MC:x599 | boi_RP:x24 |
| 8.1 | Foreign Currency -indexed NIS/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x599 | N/A |
| 8.2 | Foreign Currency -indexed NIS/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x599 | N/A |
| 8.3 | Foreign Currency -indexed NIS/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x599 | boi_RP:x24 |
| 8.4 | Foreign Currency -indexed NIS/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x12 | boi_MC:x599 | boi_RP:x24 |
| 9.1 | USD/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x599 | N/A |
| 9.2 | USD/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x599 | N/A |
| 9.3 | USD/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x599 | boi_RP:x24 |
| 9.4 | USD/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x2 | boi_MC:x599 | boi_RP:x24 |
| 10.1 | Other foreign currency/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x599 | N/A |
| 10.2 | Other foreign currency/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x599 | N/A |
| 10.3 | Other foreign currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x599 | boi_RP:x24 |
| 10.4 | Other foreign currency/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x32 | boi_MC:x599 | boi_RP:x24 |
| 11.1 | Total bonds and subordinated capital notes/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x15 | N/A |
| 11.2 | Total bonds and subordinated capital notes/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x15 | N/A |
| 11.3 | Total bonds and subordinated capital notes/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x15 | boi_RP:x24 |
| 11.4 | Total bonds and subordinated capital notes/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x15 | boi_RP:x24 |
| 12.1 | Thereof: subordinated capital notes/Avg. duration* | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x847 | N/A |
| 12.2 | Thereof: subordinated capital notes/IRR* | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x847 | N/A |
| 12.3 | Thereof: subordinated capital notes/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x847 | boi_RP:x24 |
| 12.4 | Thereof: subordinated capital notes/Company | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x847 | boi_RP:x24 |