| r0.2 | label_boi_a2/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | boi_RP:x19 | N/A | N/A |
| r0.3 | label_boi_a2/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | boi_RP:x19 | N/A | N/A |
| r0.5 | label_boi_a2/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r0.6 | label_boi_a2/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r1.2 | Deposits of the public/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| r1.3 | Deposits of the public/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| r1.5 | Deposits of the public/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| r1.6 | Deposits of the public/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| 1.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| 1.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| 1.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| 1.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| 2.2 | On Demand/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 2.3 | On Demand/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 2.5 | On Demand/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 2.6 | On Demand/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 3.2 | Term/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 3.3 | Term/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 3.5 | Term/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 3.6 | Term/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 4.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| 4.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| 4.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| 4.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| 5.2 | On Demand/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 5.3 | On Demand/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 5.5 | On Demand/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 5.6 | On Demand/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x37 |
| 6.2 | Term/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 6.3 | Term/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 6.5 | Term/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 6.6 | Term/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | boi_TI:x35 |
| 7.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| 7.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x16 | N/A |
| 7.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| 7.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x16 | N/A |
| r9.2 | Deposits of the government/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| r9.3 | Deposits of the government/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| r9.5 | Deposits of the government/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| r9.6 | Deposits of the government/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| 8.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| 8.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| 8.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| 8.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| 9.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| 9.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| 9.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| 9.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| 10.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| 10.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x11 | N/A |
| 10.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| 10.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x11 | N/A |
| r13.2 | Deposits from central banks/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | N/A | N/A |
| r13.3 | Deposits from central banks/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | N/A | N/A |
| r13.5 | Deposits from central banks/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r13.6 | Deposits from central banks/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 11.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x20 | N/A |
| 11.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x20 | N/A |
| 11.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x20 | N/A |
| 11.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x20 | N/A |
| 12.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x21 | N/A |
| 12.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x21 | N/A |
| 12.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x21 | N/A |
| 12.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x21 | N/A |
| 13.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x2 | N/A |
| 13.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x2 | N/A |
| 13.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x2 | N/A |
| 13.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x2 | N/A |
| r17.2 | Deposits from banks/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| r17.3 | Deposits from banks/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| r17.5 | Deposits from banks/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| r17.6 | Deposits from banks/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| 14.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| 14.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| 14.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| 14.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| 15.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| 15.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| 15.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| 15.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| 16.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| 16.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | boi_RP:x19 | boi_SE:x5 | N/A |
| 16.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| 16.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | boi_RP:x19 | boi_SE:x5 | N/A |
| r21.2 | Securities lent or sold under repurchase agreements/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| r21.3 | Securities lent or sold under repurchase agreements/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| r21.5 | Securities lent or sold under repurchase agreements/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r21.6 | Securities lent or sold under repurchase agreements/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 17.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| 17.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| 17.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 17.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 18.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| 18.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| 18.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 18.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 19.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| 19.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | N/A | boi_RP:x19 | N/A | N/A |
| 19.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 19.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r25.2 | Bonds/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| r25.3 | Bonds/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| r25.5 | Bonds/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r25.6 | Bonds/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 20.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| 20.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| 20.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 20.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 21.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| 21.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| 21.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 21.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 22.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| 22.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_RP:x19 | N/A | N/A |
| 22.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 22.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r29.2 | Other liabilities/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| r29.3 | Other liabilities/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| r29.5 | Other liabilities/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| r29.6 | Other liabilities/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 23.2 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| 23.3 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| 23.5 | In Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 23.6 | In Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 24.2 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| 24.3 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| 24.5 | Outside Israel/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 24.6 | Outside Israel/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 25.2 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| 25.3 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | N/A | boi_RP:x19 | N/A | N/A |
| 25.5 | Total/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 25.6 | Total/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x472 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 26.2 | Total interest - bearing liabilities/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x3 | N/A | boi_RP:x19 | N/A | N/A |
| 26.3 | Total interest - bearing liabilities/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x3 | N/A | boi_RP:x19 | N/A | N/A |
| 26.5 | Total interest - bearing liabilities/Interest expenses | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x3 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |
| 26.6 | Total interest - bearing liabilities/Rate of expense | boi_met:pd90 | num:percentItemType | instant | boi_BC:x12 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x3 | boi_MU:x1 | boi_RP:x19 | N/A | N/A |