| r0.1 | label_boi_a2/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r0.2 | label_boi_a2/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r0.3 | label_boi_a2/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r0.4 | label_boi_a2/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A |
| r0.5 | label_boi_a2/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A |
| r1.1 | a. Items measured at a fair value on a recurring basis Assets/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r1.2 | a. Items measured at a fair value on a recurring basis Assets/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r1.3 | a. Items measured at a fair value on a recurring basis Assets/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r1.4 | a. Items measured at a fair value on a recurring basis Assets/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A |
| r1.5 | a. Items measured at a fair value on a recurring basis Assets/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A |
| r2.1 | Bonds available for sale and non trade securities/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r2.2 | Bonds available for sale and non trade securities/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r2.3 | Bonds available for sale and non trade securities/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r2.4 | Bonds available for sale and non trade securities/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| r2.5 | Bonds available for sale and non trade securities/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 1.1 | Israeili government/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x11 |
| 1.2 | Israeili government/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x11 |
| 1.3 | Israeili government/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x11 |
| 1.4 | Israeili government/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 1.5 | Israeili government/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 2.1 | Foreign governments/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x11 |
| 2.2 | Foreign governments/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x11 |
| 2.3 | Foreign governments/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x11 |
| 2.4 | Foreign governments/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 2.5 | Foreign governments/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 3.1 | Israeli finance instituations/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x9 |
| 3.2 | Israeli finance instituations/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x9 |
| 3.3 | Israeli finance instituations/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x9 |
| 3.4 | Israeli finance instituations/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 3.5 | Israeli finance instituations/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 4.1 | Foreign finance instituations/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x9 |
| 4.2 | Foreign finance instituations/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x9 |
| 4.3 | Foreign finance instituations/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x9 |
| 4.4 | Foreign finance instituations/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 4.5 | Foreign finance instituations/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 5.1 | Assets backed or Mortgage backed/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 5.2 | Assets backed or Mortgage backed/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 5.3 | Assets backed or Mortgage backed/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 5.4 | Assets backed or Mortgage backed/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 5.5 | Assets backed or Mortgage backed/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 6.1 | Of others in Israel/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x69 |
| 6.2 | Of others in Israel/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x69 |
| 6.3 | Of others in Israel/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x69 |
| 6.4 | Of others in Israel/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 6.5 | Of others in Israel/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 7.1 | Of others Foreign securities/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x69 |
| 7.2 | Of others Foreign securities/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x69 |
| 7.3 | Of others Foreign securities/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x69 |
| 7.4 | Of others Foreign securities/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 7.5 | Of others Foreign securities/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 8.1 | Shares/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 8.2 | Shares/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 8.3 | Shares/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 8.4 | Shares/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 8.5 | Shares/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 9.1 | Total securities available for sale/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 9.2 | Total securities available for sale/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 9.3 | Total securities available for sale/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x1 | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 9.4 | Total securities available for sale/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x2 | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 9.5 | Total securities available for sale/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | N/A | boi_PL:x1 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| r12.1 | Securities trading/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r12.2 | Securities trading/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r12.3 | Securities trading/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r12.4 | Securities trading/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| r12.5 | Securities trading/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 10.1 | Israeili government/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x11 |
| 10.2 | Israeili government/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x11 |
| 10.3 | Israeili government/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x11 |
| 10.4 | Israeili government/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 10.5 | Israeili government/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 11.1 | Foreign governments/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x11 |
| 11.2 | Foreign governments/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x11 |
| 11.3 | Foreign governments/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x11 |
| 11.4 | Foreign governments/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 11.5 | Foreign governments/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x11 |
| 12.1 | Israeli finance instituations/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x9 |
| 12.2 | Israeli finance instituations/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x9 |
| 12.3 | Israeli finance instituations/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x9 |
| 12.4 | Israeli finance instituations/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 12.5 | Israeli finance instituations/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 13.1 | Foreign finance instituations/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x9 |
| 13.2 | Foreign finance instituations/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x9 |
| 13.3 | Foreign finance instituations/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x9 |
| 13.4 | Foreign finance instituations/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 13.5 | Foreign finance instituations/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x9 |
| 14.1 | Assets backed or Mortgage backed/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 14.2 | Assets backed or Mortgage backed/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 14.3 | Assets backed or Mortgage backed/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 14.4 | Assets backed or Mortgage backed/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 14.5 | Assets backed or Mortgage backed/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 15.1 | Of others in Israel/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x69 |
| 15.2 | Of others in Israel/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x69 |
| 15.3 | Of others in Israel/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x69 |
| 15.4 | Of others in Israel/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 15.5 | Of others in Israel/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 16.1 | Of others Foreign securities/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | boi_SE:x69 |
| 16.2 | Of others Foreign securities/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | boi_SE:x69 |
| 16.3 | Of others Foreign securities/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_SE:x69 |
| 16.4 | Of others Foreign securities/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 16.5 | Of others Foreign securities/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | boi_SE:x69 |
| 17.1 | Shares/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 17.2 | Shares/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 17.3 | Shares/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 17.4 | Shares/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 17.5 | Shares/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 18.1 | Total trading securities/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 18.2 | Total trading securities/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 18.3 | Total trading securities/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x1 | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 18.4 | Total trading securities/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_NE:x2 | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 18.5 | Total trading securities/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | N/A | boi_PL:x2 | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| r22.1 | Derivative instruments/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r22.2 | Derivative instruments/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r22.3 | Derivative instruments/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r22.4 | Derivative instruments/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| r22.5 | Derivative instruments/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 19.1 | Shekel-CPI contracts/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x12 | N/A |
| 19.2 | Shekel-CPI contracts/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x12 | N/A |
| 19.3 | Shekel-CPI contracts/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x12 | N/A |
| 19.4 | Shekel-CPI contracts/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x12 | N/A |
| 19.5 | Shekel-CPI contracts/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x12 | N/A |
| 20.1 | Other interest contracts/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x13 | N/A |
| 20.2 | Other interest contracts/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x13 | N/A |
| 20.3 | Other interest contracts/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x13 | N/A |
| 20.4 | Other interest contracts/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x13 | N/A |
| 20.5 | Other interest contracts/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x13 | N/A |
| 21.1 | Foreign currency contracts/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x10 | N/A |
| 21.2 | Foreign currency contracts/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x10 | N/A |
| 21.3 | Foreign currency contracts/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x10 | N/A |
| 21.4 | Foreign currency contracts/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x10 | N/A |
| 21.5 | Foreign currency contracts/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x10 | N/A |
| 22.1 | Contracts in respect to shares/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x9 | N/A |
| 22.2 | Contracts in respect to shares/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x9 | N/A |
| 22.3 | Contracts in respect to shares/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x9 | N/A |
| 22.4 | Contracts in respect to shares/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x9 | N/A |
| 22.5 | Contracts in respect to shares/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x9 | N/A |
| 23.1 | Credit derivatives/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x16 | N/A |
| 23.2 | Credit derivatives/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x16 | N/A |
| 23.3 | Credit derivatives/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x16 | N/A |
| 23.4 | Credit derivatives/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 23.5 | Credit derivatives/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 24.1 | Commodity contracts and others/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x16 | N/A |
| 24.2 | Commodity contracts and others/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x16 | N/A |
| 24.3 | Commodity contracts and others/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x16 | N/A |
| 24.4 | Commodity contracts and others/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 24.5 | Commodity contracts and others/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 25.1 | Total assets in respect to derivative instruments/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 25.2 | Total assets in respect to derivative instruments/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 25.3 | Total assets in respect to derivative instruments/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 25.4 | Total assets in respect to derivative instruments/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 25.5 | Total assets in respect to derivative instruments/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 26.1 | Other assets/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 26.2 | Other assets/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 26.3 | Other assets/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 26.4 | Other assets/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 26.5 | Other assets/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 27.1 | Total assets/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 27.2 | Total assets/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 27.3 | Total assets/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 27.4 | Total assets/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 27.5 | Total assets/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 28.1 | Assets transformed from level 2 to level 1/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x50 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 28.2 | Assets transformed from level 2 to level 1/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x50 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 28.3 | Assets transformed from level 2 to level 1/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x50 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 28.4 | Assets transformed from level 2 to level 1/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x2 | N/A | boi_PL:x50 | N/A | boi_RP:x24 | N/A | N/A |
| 28.5 | Assets transformed from level 2 to level 1/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | N/A | N/A | boi_PL:x50 | N/A | boi_RP:x24 | N/A | N/A |
| 29.1 | Assets transformed from level 1 to level 2/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x49 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 29.2 | Assets transformed from level 1 to level 2/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x49 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 29.3 | Assets transformed from level 1 to level 2/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x1 | N/A | boi_PL:x49 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 29.4 | Assets transformed from level 1 to level 2/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_NE:x2 | N/A | boi_PL:x49 | N/A | boi_RP:x24 | N/A | N/A |
| 29.5 | Assets transformed from level 1 to level 2/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | N/A | N/A | boi_PL:x49 | N/A | boi_RP:x24 | N/A | N/A |
| r34.1 | b. Items measured at a fair value on a recurring basis Liabilities/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r34.2 | b. Items measured at a fair value on a recurring basis Liabilities/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r34.3 | b. Items measured at a fair value on a recurring basis Liabilities/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | N/A | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r34.4 | b. Items measured at a fair value on a recurring basis Liabilities/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A |
| r34.5 | b. Items measured at a fair value on a recurring basis Liabilities/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A |
| r35.1 | Derivative instruments/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r35.2 | Derivative instruments/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r35.3 | Derivative instruments/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r35.4 | Derivative instruments/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| r35.5 | Derivative instruments/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 30.1 | Shekel-CPI contracts/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x12 | N/A |
| 30.2 | Shekel-CPI contracts/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x12 | N/A |
| 30.3 | Shekel-CPI contracts/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x12 | N/A |
| 30.4 | Shekel-CPI contracts/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x12 | N/A |
| 30.5 | Shekel-CPI contracts/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x12 | N/A |
| 31.1 | Other interest contracts/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x13 | N/A |
| 31.2 | Other interest contracts/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x13 | N/A |
| 31.3 | Other interest contracts/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x13 | N/A |
| 31.4 | Other interest contracts/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x13 | N/A |
| 31.5 | Other interest contracts/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x13 | N/A |
| 32.1 | Foreign currency contracts/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x10 | N/A |
| 32.2 | Foreign currency contracts/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x10 | N/A |
| 32.3 | Foreign currency contracts/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x10 | N/A |
| 32.4 | Foreign currency contracts/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x10 | N/A |
| 32.5 | Foreign currency contracts/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x10 | N/A |
| 33.1 | Contracts in respect to shares/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x9 | N/A |
| 33.2 | Contracts in respect to shares/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x9 | N/A |
| 33.3 | Contracts in respect to shares/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x9 | N/A |
| 33.4 | Contracts in respect to shares/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x9 | N/A |
| 33.5 | Contracts in respect to shares/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x9 | N/A |
| 34.1 | Credit derivatives/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x16 | N/A |
| 34.2 | Credit derivatives/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x16 | N/A |
| 34.3 | Credit derivatives/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x16 | N/A |
| 34.4 | Credit derivatives/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 34.5 | Credit derivatives/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 35.1 | Commodity contracts and others/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | boi_RT:x16 | N/A |
| 35.2 | Commodity contracts and others/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | boi_RT:x16 | N/A |
| 35.3 | Commodity contracts and others/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RT:x16 | N/A |
| 35.4 | Commodity contracts and others/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 35.5 | Commodity contracts and others/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | boi_RT:x16 | N/A |
| 36.1 | Total assets in respect to derivative instruments/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 36.2 | Total assets in respect to derivative instruments/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 36.3 | Total assets in respect to derivative instruments/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 36.4 | Total assets in respect to derivative instruments/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 36.5 | Total assets in respect to derivative instruments/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 37.1 | Liabilities - others/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 37.2 | Liabilities - others/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 37.3 | Liabilities - others/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 37.4 | Liabilities - others/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 37.5 | Liabilities - others/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 38.1 | Total liabilities/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 38.2 | Total liabilities/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 38.3 | Total liabilities/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 38.4 | Total liabilities/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x2 | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 38.5 | Total liabilities/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | N/A | N/A | boi_PL:x48 | N/A | boi_RP:x24 | N/A | N/A |
| 39.1 | Liabilities transformed from level 2 to level 1/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x50 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 39.2 | Liabilities transformed from level 2 to level 1/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x50 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 39.3 | Liabilities transformed from level 2 to level 1/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x50 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 39.4 | Liabilities transformed from level 2 to level 1/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x2 | N/A | boi_PL:x50 | N/A | boi_RP:x24 | N/A | N/A |
| 39.5 | Liabilities transformed from level 2 to level 1/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | N/A | N/A | boi_PL:x50 | N/A | boi_RP:x24 | N/A | N/A |
| 40.1 | Liabilities transformed from level 1 to level 2/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x49 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 40.2 | Liabilities transformed from level 1 to level 2/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x49 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 40.3 | Liabilities transformed from level 1 to level 2/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x1 | N/A | boi_PL:x49 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 40.4 | Liabilities transformed from level 1 to level 2/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_NE:x2 | N/A | boi_PL:x49 | N/A | boi_RP:x24 | N/A | N/A |
| 40.5 | Liabilities transformed from level 1 to level 2/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | N/A | N/A | boi_PL:x49 | N/A | boi_RP:x24 | N/A | N/A |
| r47.1 | Items measured at fair value on a non-recurring basis/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| r47.2 | Items measured at fair value on a non-recurring basis/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| r47.3 | Items measured at fair value on a non-recurring basis/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| r47.4 | Items measured at fair value on a non-recurring basis/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_NE:x2 | N/A | boi_PL:x47 | N/A | boi_RP:x24 | N/A | N/A |
| r47.5 | Items measured at fair value on a non-recurring basis/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | boi_PL:x47 | N/A | boi_RP:x24 | N/A | N/A |
| 41.1 | Impaired credit of which collection is dependent on collateral/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x672 | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 41.2 | Impaired credit of which collection is dependent on collateral/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x672 | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 41.3 | Impaired credit of which collection is dependent on collateral/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x672 | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 41.4 | Impaired credit of which collection is dependent on collateral/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x672 | boi_NE:x2 | N/A | boi_PL:x47 | N/A | boi_RP:x24 | N/A | N/A |
| 41.5 | Impaired credit of which collection is dependent on collateral/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x672 | N/A | N/A | boi_PL:x47 | N/A | boi_RP:x24 | N/A | N/A |
| 42.1 | Others/Price quoted level 1 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x5 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x673 | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x38 | boi_RP:x24 | N/A | N/A |
| 42.2 | Others/Observable inputs level 2 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x5 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x673 | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x39 | boi_RP:x24 | N/A | N/A |
| 42.3 | Others/Non observable inputs level 3 | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x5 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x673 | boi_NE:x1 | N/A | boi_PL:x47 | boi_PL:x40 | boi_RP:x24 | N/A | N/A |
| 42.4 | Others/Impact of Offset | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x5 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x673 | boi_NE:x2 | N/A | boi_PL:x47 | N/A | boi_RP:x24 | N/A | N/A |
| 42.5 | Others/Total fair value | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x5 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x673 | N/A | N/A | boi_PL:x47 | N/A | boi_RP:x24 | N/A | N/A |