| r0.1 | label_boi_a2/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | N/A | N/A |
| r0.2 | label_boi_a2/Internal rate of return | 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/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | N/A | boi_RP:x24 |
| r1.1 | Debentures and bonds/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x600 | N/A |
| r1.2 | Debentures and bonds/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x600 | N/A |
| r1.3 | Debentures and bonds/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x600 | boi_RP:x24 |
| r1.4 | Debentures and bonds/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x600 | boi_RP:x24 |
| 1.1 | Unlinked Israeli currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x600 | N/A |
| 1.2 | Unlinked Israeli currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x600 | N/A |
| 1.3 | Unlinked Israeli currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x600 | boi_RP:x24 |
| 1.4 | Unlinked Israeli currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x5 | boi_MC:x600 | boi_RP:x24 |
| 2.1 | In Israeli currency linked to the CPI/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x600 | N/A |
| 2.2 | In Israeli currency linked to the CPI/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x600 | N/A |
| 2.3 | In Israeli currency linked to the CPI/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x600 | boi_RP:x24 |
| 2.4 | In Israeli currency linked to the CPI/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x6 | boi_MC:x600 | boi_RP:x24 |
| 3.1 | In Israeli currency linked to foreign currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x600 | N/A |
| 3.2 | In Israeli currency linked to foreign currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x600 | N/A |
| 3.3 | In Israeli currency linked to foreign currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x600 | boi_RP:x24 |
| 3.4 | In Israeli currency linked to foreign currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x12 | boi_MC:x600 | boi_RP:x24 |
| 4.1 | In U.S. Dollars foreign currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x600 | N/A |
| 4.2 | In U.S. Dollars foreign currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x600 | N/A |
| 4.3 | In U.S. Dollars foreign currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x600 | boi_RP:x24 |
| 4.4 | In U.S. Dollars foreign currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x2 | boi_MC:x600 | boi_RP:x24 |
| 5.1 | In other foreign currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x600 | N/A |
| 5.2 | In other foreign currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x600 | N/A |
| 5.3 | In 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 | In other foreign currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x32 | boi_MC:x600 | boi_RP:x24 |
| r7.1 | Subordinated note/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x599 | N/A |
| r7.2 | Subordinated note/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x599 | N/A |
| r7.3 | Subordinated note/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x599 | boi_RP:x24 |
| r7.4 | Subordinated note/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x599 | boi_RP:x24 |
| 6.1 | Unlinked Israeli currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x599 | N/A |
| 6.2 | Unlinked Israeli currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x599 | N/A |
| 6.3 | Unlinked Israeli currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x5 | boi_MC:x599 | boi_RP:x24 |
| 6.4 | Unlinked Israeli currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x5 | boi_MC:x599 | boi_RP:x24 |
| 7.1 | In Israeli currency linked to the CPI/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x599 | N/A |
| 7.2 | In Israeli currency linked to the CPI/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x599 | N/A |
| 7.3 | In Israeli currency linked to the CPI/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x6 | boi_MC:x599 | boi_RP:x24 |
| 7.4 | In Israeli currency linked to the CPI/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x6 | boi_MC:x599 | boi_RP:x24 |
| 8.1 | In Israeli currency linked to foreign currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x599 | N/A |
| 8.2 | In Israeli currency linked to foreign currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x599 | N/A |
| 8.3 | In Israeli currency linked to foreign currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x12 | boi_MC:x599 | boi_RP:x24 |
| 8.4 | In Israeli currency linked to foreign currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x12 | boi_MC:x599 | boi_RP:x24 |
| 9.1 | In U.S. Dollars foreign currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x599 | N/A |
| 9.2 | In U.S. Dollars foreign currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x599 | N/A |
| 9.3 | In U.S. Dollars foreign currency/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x2 | boi_MC:x599 | boi_RP:x24 |
| 9.4 | In U.S. Dollars foreign currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x2 | boi_MC:x599 | boi_RP:x24 |
| 10.1 | In other foreign currency/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x599 | N/A |
| 10.2 | In other foreign currency/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_CU:x32 | boi_MC:x599 | N/A |
| 10.3 | In 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 | In other foreign currency/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | boi_CU:x32 | boi_MC:x599 | boi_RP:x24 |
| 11.1 | Total debentures,notes and subordinated notes/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x15 | N/A |
| 11.2 | Total debentures,notes and subordinated notes/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x15 | N/A |
| 11.3 | Total debentures,notes and subordinated 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 debentures,notes and subordinated notes/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x15 | boi_RP:x24 |
| 12.1 | of which: subordinated notes/Average duration | boi_met:ri12 | xbrli:decimalItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x847 | N/A |
| 12.2 | of which: subordinated notes/Internal rate of return | boi_met:pi11 | num:percentItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x847 | N/A |
| 12.3 | of which: subordinated notes/Consolidated | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | N/A | boi_MC:x847 | boi_RP:x24 |
| 12.4 | of which: subordinated notes/Bank Corporation | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x1 | N/A | boi_MC:x847 | boi_RP:x24 |