| r0.1 | label_boi_a2/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r0.2 | label_boi_a2/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r1.1 | A. Interested Income/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r1.2 | A. Interested Income/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 1.1 | Credit to the public/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x16 |
| 1.2 | Credit to the public/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x16 |
| 2.1 | Credit to governments/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x11 |
| 2.2 | Credit to governments/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x11 |
| 3.1 | Deposits with bank of Israel and cash/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x9 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x20 |
| 3.2 | Deposits with bank of Israel and cash/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x9 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x20 |
| 4.1 | Deposits with banks/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x26 |
| 4.2 | Deposits with banks/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x26 |
| 5.1 | Securities borrowed or purchased under agreements to resell/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 5.2 | Securities borrowed or purchased under agreements to resell/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 6.1 | Bonds/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 6.2 | Bonds/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 7.1 | Of which: Interested income on accrual basis mortgage-backed securities/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x120 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 7.2 | Of which: Interested income on accrual basis mortgage-backed securities/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x120 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 8.1 | Other assets/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x41 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 8.2 | Other assets/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x41 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 9.1 | Total interest income/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 9.2 | Total interest income/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r11.1 | B. Interest expenses/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r11.2 | B. Interest expenses/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 10.1 | Deposits of the public/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x16 |
| 10.2 | Deposits of the public/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x16 |
| 11.1 | Deposits from governments/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x11 |
| 11.2 | Deposits from governments/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x11 |
| 12.1 | Deposits from the bank of Israel/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x20 |
| 12.2 | Deposits from the bank of Israel/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x20 |
| 13.1 | Deposits from banks/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x26 |
| 13.2 | Deposits from banks/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x25 | boi_SE:x26 |
| 14.1 | Securities borrowed or purchased under agreements to resell/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 14.2 | Securities borrowed or purchased under agreements to resell/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 15.1 | Bonds/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 15.2 | Bonds/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 16.1 | Other liabilities/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x20 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 16.2 | Other liabilities/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x20 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 17.1 | Total interested expenses/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 17.2 | Total interested expenses/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 18.1 | Total interest income, net/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 18.2 | Total interest income, net/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x1 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r21.1 | C. Details of the net effect of hedging derivative financial instruments on interest income and expenses/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x25 | N/A |
| r21.2 | C. Details of the net effect of hedging derivative financial instruments on interest income and expenses/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x25 | N/A |
| 19.1 | Interest income/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x25 | N/A |
| 19.2 | Interest income/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x25 | N/A |
| 20.1 | Interest expenses/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x25 | N/A |
| 20.2 | Interest expenses/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x1 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x25 | N/A |
| r24.1 | D. Details of interest income an accrual basis from bonds/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| r24.2 | D. Details of interest income an accrual basis from bonds/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 21.1 | Held to maturity/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x5 | boi_RP:x25 | N/A |
| 21.2 | Held to maturity/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x5 | boi_RP:x25 | N/A |
| 22.1 | Available for sale/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x1 | boi_RP:x25 | N/A |
| 22.2 | Available for sale/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x1 | boi_RP:x25 | N/A |
| 23.1 | Held for trading/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x2 | boi_RP:x25 | N/A |
| 23.2 | Held for trading/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x2 | boi_RP:x25 | N/A |
| 24.1 | Total included in interested/Consolidated | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |
| 24.2 | Total included in interested/Bank Corporation | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x1 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x25 | N/A |