| r0.1 | label_boi_a2/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r0.2 | label_boi_a2/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.3 | label_boi_a2/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.4 | label_boi_a2/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.5 | label_boi_a2/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.6 | label_boi_a2/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.7 | label_boi_a2/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.8 | label_boi_a2/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.9 | label_boi_a2/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r0.10 | label_boi_a2/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.1 | Assets/Fair value at the beginning of the year | 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 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r1.2 | Assets/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.3 | Assets/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.4 | Assets/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.5 | Assets/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.6 | Assets/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.7 | Assets/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.8 | Assets/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.9 | Assets/Fair value at the end of the year | 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 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r1.10 | Assets/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.1 | Bonds available for sale and non trade securities/Fair value at the beginning of the year | 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:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r2.2 | Bonds available for sale and non trade securities/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.3 | Bonds available for sale and non trade securities/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.4 | Bonds available for sale and non trade securities/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.5 | Bonds available for sale and non trade securities/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.6 | Bonds available for sale and non trade securities/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.7 | Bonds available for sale and non trade securities/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.8 | Bonds available for sale and non trade securities/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.9 | Bonds available for sale and non trade securities/Fair value at the end of the year | 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:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r2.10 | Bonds available for sale and non trade securities/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 1.1 | Israeili government/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x11 |
| 1.2 | Israeili government/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.3 | Israeili government/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.4 | Israeili government/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.5 | Israeili government/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.6 | Israeili government/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.7 | Israeili government/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.8 | Israeili government/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.9 | Israeili government/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 1.10 | Israeili government/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.1 | Foreign governments/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x11 |
| 2.2 | Foreign governments/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.3 | Foreign governments/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.4 | Foreign governments/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.5 | Foreign governments/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.6 | Foreign governments/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.7 | Foreign governments/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.8 | Foreign governments/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.9 | Foreign governments/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 2.10 | Foreign governments/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 3.1 | Israeli finance instituations/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x9 |
| 3.2 | Israeli finance instituations/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.3 | Israeli finance instituations/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.4 | Israeli finance instituations/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.5 | Israeli finance instituations/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.6 | Israeli finance instituations/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.7 | Israeli finance instituations/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.8 | Israeli finance instituations/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.9 | Israeli finance instituations/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 3.10 | Israeli finance instituations/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.1 | Foreign finance instituations/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x9 |
| 4.2 | Foreign finance instituations/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.3 | Foreign finance instituations/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.4 | Foreign finance instituations/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.5 | Foreign finance instituations/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.6 | Foreign finance instituations/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.7 | Foreign finance instituations/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.8 | Foreign finance instituations/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.9 | Foreign finance instituations/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 4.10 | Foreign finance instituations/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 5.1 | Assets backed or Mortgage backed/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 5.2 | Assets backed or Mortgage backed/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.3 | Assets backed or Mortgage backed/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.4 | Assets backed or Mortgage backed/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.5 | Assets backed or Mortgage backed/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.6 | Assets backed or Mortgage backed/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.7 | Assets backed or Mortgage backed/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.8 | Assets backed or Mortgage backed/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.9 | Assets backed or Mortgage backed/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 5.10 | Assets backed or Mortgage backed/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 6.1 | Of others in Israel/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x69 |
| 6.2 | Of others in Israel/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.3 | Of others in Israel/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.4 | Of others in Israel/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.5 | Of others in Israel/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.6 | Of others in Israel/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.7 | Of others in Israel/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.8 | Of others in Israel/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.9 | Of others in Israel/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 6.10 | Of others in Israel/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.1 | Of others Foreign securities/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x69 |
| 7.2 | Of others Foreign securities/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.3 | Of others Foreign securities/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.4 | Of others Foreign securities/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.5 | Of others Foreign securities/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.6 | Of others Foreign securities/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.7 | Of others Foreign securities/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.8 | Of others Foreign securities/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.9 | Of others Foreign securities/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 7.10 | Of others Foreign securities/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 8.1 | Shares/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 8.2 | Shares/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.3 | Shares/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.4 | Shares/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.5 | Shares/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.6 | Shares/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.7 | Shares/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.8 | Shares/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.9 | Shares/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 8.10 | Shares/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.1 | Total securities available for sale/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 9.2 | Total securities available for sale/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.3 | Total securities available for sale/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.4 | Total securities available for sale/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.5 | Total securities available for sale/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.6 | Total securities available for sale/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.7 | Total securities available for sale/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.8 | Total securities available for sale/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.9 | Total securities available for sale/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | N/A | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 9.10 | Total securities available for sale/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x1 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.1 | Securities trading/Fair value at the beginning of the year | 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:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r12.2 | Securities trading/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.3 | Securities trading/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.4 | Securities trading/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.5 | Securities trading/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.6 | Securities trading/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.7 | Securities trading/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.8 | Securities trading/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.9 | Securities trading/Fair value at the end of the year | 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:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r12.10 | Securities trading/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 10.1 | Israeili government/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x11 |
| 10.2 | Israeili government/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.3 | Israeili government/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.4 | Israeili government/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.5 | Israeili government/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.6 | Israeili government/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.7 | Israeili government/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.8 | Israeili government/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.9 | Israeili government/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 10.10 | Israeili government/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.1 | Foreign governments/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x11 |
| 11.2 | Foreign governments/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.3 | Foreign governments/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.4 | Foreign governments/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.5 | Foreign governments/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.6 | Foreign governments/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.7 | Foreign governments/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.8 | Foreign governments/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.9 | Foreign governments/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 11.10 | Foreign governments/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x11 |
| 12.1 | Israeli finance instituations/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x9 |
| 12.2 | Israeli finance instituations/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.3 | Israeli finance instituations/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.4 | Israeli finance instituations/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.5 | Israeli finance instituations/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.6 | Israeli finance instituations/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.7 | Israeli finance instituations/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.8 | Israeli finance instituations/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.9 | Israeli finance instituations/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 12.10 | Israeli finance instituations/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.1 | Foreign finance instituations/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x9 |
| 13.2 | Foreign finance instituations/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.3 | Foreign finance instituations/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.4 | Foreign finance instituations/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.5 | Foreign finance instituations/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.6 | Foreign finance instituations/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.7 | Foreign finance instituations/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.8 | Foreign finance instituations/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.9 | Foreign finance instituations/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 13.10 | Foreign finance instituations/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x9 |
| 14.1 | Assets backed or Mortgage backed/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 14.2 | Assets backed or Mortgage backed/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.3 | Assets backed or Mortgage backed/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.4 | Assets backed or Mortgage backed/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.5 | Assets backed or Mortgage backed/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.6 | Assets backed or Mortgage backed/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.7 | Assets backed or Mortgage backed/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.8 | Assets backed or Mortgage backed/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.9 | Assets backed or Mortgage backed/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 14.10 | Assets backed or Mortgage backed/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x942 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 15.1 | Of others in Israel/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x69 |
| 15.2 | Of others in Israel/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.3 | Of others in Israel/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.4 | Of others in Israel/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.5 | Of others in Israel/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.6 | Of others in Israel/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.7 | Of others in Israel/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.8 | Of others in Israel/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.9 | Of others in Israel/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 15.10 | Of others in Israel/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x1 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.1 | Of others Foreign securities/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | boi_SE:x69 |
| 16.2 | Of others Foreign securities/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.3 | Of others Foreign securities/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.4 | Of others Foreign securities/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.5 | Of others Foreign securities/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.6 | Of others Foreign securities/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.7 | Of others Foreign securities/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.8 | Of others Foreign securities/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.9 | Of others Foreign securities/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 16.10 | Of others Foreign securities/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | boi_GA:x2 | boi_MC:x941 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | boi_SE:x69 |
| 17.1 | Shares/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 17.2 | Shares/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.3 | Shares/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.4 | Shares/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.5 | Shares/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.6 | Shares/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.7 | Shares/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.8 | Shares/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.9 | Shares/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 17.10 | Shares/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x943 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.1 | Total trading securities/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 18.2 | Total trading securities/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.3 | Total trading securities/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.4 | Total trading securities/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.5 | Total trading securities/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.6 | Total trading securities/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.7 | Total trading securities/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.8 | Total trading securities/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.9 | Total trading securities/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | N/A | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 18.10 | Total trading securities/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x940 | boi_MU:x1 | N/A | boi_PL:x2 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.1 | Derivative instruments/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r22.2 | Derivative instruments/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.3 | Derivative instruments/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.4 | Derivative instruments/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.5 | Derivative instruments/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.6 | Derivative instruments/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.7 | Derivative instruments/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.8 | Derivative instruments/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.9 | Derivative instruments/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r22.10 | Derivative instruments/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 19.1 | Interest contracts/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x8 | N/A |
| 19.2 | Interest contracts/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.3 | Interest contracts/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.4 | Interest contracts/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.5 | Interest contracts/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.6 | Interest contracts/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.7 | Interest contracts/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.8 | Interest contracts/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.9 | Interest contracts/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 19.10 | Interest contracts/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 20.1 | Foreign currency contracts/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x10 | N/A |
| 20.2 | Foreign currency contracts/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.3 | Foreign currency contracts/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.4 | Foreign currency contracts/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.5 | Foreign currency contracts/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.6 | Foreign currency contracts/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.7 | Foreign currency contracts/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.8 | Foreign currency contracts/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.9 | Foreign currency contracts/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 20.10 | Foreign currency contracts/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 21.1 | Contracts in respect to shares/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x9 | N/A |
| 21.2 | Contracts in respect to shares/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.3 | Contracts in respect to shares/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.4 | Contracts in respect to shares/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.5 | Contracts in respect to shares/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.6 | Contracts in respect to shares/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.7 | Contracts in respect to shares/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.8 | Contracts in respect to shares/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.9 | Contracts in respect to shares/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 21.10 | Contracts in respect to shares/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 22.1 | Credit derivatives/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x16 | N/A |
| 22.2 | Credit derivatives/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.3 | Credit derivatives/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.4 | Credit derivatives/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.5 | Credit derivatives/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.6 | Credit derivatives/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.7 | Credit derivatives/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.8 | Credit derivatives/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.9 | Credit derivatives/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 22.10 | Credit derivatives/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.1 | Commodity contracts and others/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x16 | N/A |
| 23.2 | Commodity contracts and others/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.3 | Commodity contracts and others/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.4 | Commodity contracts and others/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.5 | Commodity contracts and others/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.6 | Commodity contracts and others/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.7 | Commodity contracts and others/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.8 | Commodity contracts and others/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.9 | Commodity contracts and others/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 23.10 | Commodity contracts and others/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 24.1 | Total assets in respect to derivative instruments/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 24.2 | Total assets in respect to derivative instruments/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.3 | Total assets in respect to derivative instruments/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.4 | Total assets in respect to derivative instruments/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.5 | Total assets in respect to derivative instruments/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.6 | Total assets in respect to derivative instruments/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.7 | Total assets in respect to derivative instruments/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.8 | Total assets in respect to derivative instruments/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.9 | Total assets in respect to derivative instruments/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 24.10 | Total assets in respect to derivative instruments/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.1 | Other assets/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | N/A | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 25.2 | Other assets/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.3 | Other assets/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.4 | Other assets/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.5 | Other assets/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.6 | Other assets/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.7 | Other assets/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.8 | Other assets/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.9 | Other assets/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | N/A | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 25.10 | Other assets/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x947 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.1 | Total assets/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 26.2 | Total assets/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.3 | Total assets/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.4 | Total assets/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.5 | Total assets/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.6 | Total assets/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.7 | Total assets/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.8 | Total assets/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.9 | Total assets/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 26.10 | Total assets/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x1 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.1 | Liabilities/Fair value at the beginning of the year | 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 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r31.2 | Liabilities/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.3 | Liabilities/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.4 | Liabilities/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.5 | Liabilities/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.6 | Liabilities/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.7 | Liabilities/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.8 | Liabilities/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.9 | Liabilities/Fair value at the end of the year | 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 | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r31.10 | Liabilities/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.1 | Derivative instruments/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| r32.2 | Derivative instruments/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.3 | Derivative instruments/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.4 | Derivative instruments/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.5 | Derivative instruments/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.6 | Derivative instruments/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.7 | Derivative instruments/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.8 | Derivative instruments/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.9 | Derivative instruments/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| r32.10 | Derivative instruments/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | N/A | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 27.1 | Interest contracts/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x8 | N/A |
| 27.2 | Interest contracts/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.3 | Interest contracts/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.4 | Interest contracts/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.5 | Interest contracts/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.6 | Interest contracts/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.7 | Interest contracts/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.8 | Interest contracts/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.9 | Interest contracts/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 27.10 | Interest contracts/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x8 | N/A |
| 28.1 | Foreign currency contracts/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x10 | N/A |
| 28.2 | Foreign currency contracts/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.3 | Foreign currency contracts/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.4 | Foreign currency contracts/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.5 | Foreign currency contracts/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.6 | Foreign currency contracts/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.7 | Foreign currency contracts/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.8 | Foreign currency contracts/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.9 | Foreign currency contracts/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 28.10 | Foreign currency contracts/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x10 | N/A |
| 29.1 | Contracts in respect to shares/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x9 | N/A |
| 29.2 | Contracts in respect to shares/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.3 | Contracts in respect to shares/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.4 | Contracts in respect to shares/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.5 | Contracts in respect to shares/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.6 | Contracts in respect to shares/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.7 | Contracts in respect to shares/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.8 | Contracts in respect to shares/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.9 | Contracts in respect to shares/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 29.10 | Contracts in respect to shares/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x9 | N/A |
| 30.1 | Credit derivatives/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x16 | N/A |
| 30.2 | Credit derivatives/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.3 | Credit derivatives/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.4 | Credit derivatives/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.5 | Credit derivatives/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.6 | Credit derivatives/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.7 | Credit derivatives/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.8 | Credit derivatives/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.9 | Credit derivatives/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 30.10 | Credit derivatives/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x945 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.1 | Commodity contracts and others/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | boi_RT:x16 | N/A |
| 31.2 | Commodity contracts and others/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.3 | Commodity contracts and others/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.4 | Commodity contracts and others/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.5 | Commodity contracts and others/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.6 | Commodity contracts and others/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.7 | Commodity contracts and others/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.8 | Commodity contracts and others/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.9 | Commodity contracts and others/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 31.10 | Commodity contracts and others/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x946 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | boi_RT:x16 | N/A |
| 32.1 | Total assets in respect to derivative instruments/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 32.2 | Total assets in respect to derivative instruments/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.3 | Total assets in respect to derivative instruments/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.4 | Total assets in respect to derivative instruments/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.5 | Total assets in respect to derivative instruments/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.6 | Total assets in respect to derivative instruments/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.7 | Total assets in respect to derivative instruments/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.8 | Total assets in respect to derivative instruments/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.9 | Total assets in respect to derivative instruments/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 32.10 | Total assets in respect to derivative instruments/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x944 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.1 | Liabilities - others/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | N/A | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 33.2 | Liabilities - others/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.3 | Liabilities - others/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.4 | Liabilities - others/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.5 | Liabilities - others/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.6 | Liabilities - others/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.7 | Liabilities - others/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.8 | Liabilities - others/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.9 | Liabilities - others/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | N/A | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 33.10 | Liabilities - others/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x960 | boi_MU:x1 | N/A | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.1 | Total liabilities/Fair value at the beginning of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | boi_RP:x22 | N/A | N/A |
| 34.2 | Total liabilities/Realized and unrealized profits (losses) | boi_met:md369 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.3 | Total liabilities/Acquisitions | boi_met:md368 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.4 | Total liabilities/Sales | boi_met:md367 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.5 | Total liabilities/Extinguishments | boi_met:md366 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.6 | Total liabilities/Financial statements translations adjustments | boi_met:md365 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.7 | Total liabilities/Transfers to Level 3 | boi_met:md364 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.8 | Total liabilities/Transfer from level 3 | boi_met:md363 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.9 | Total liabilities/Fair value at the end of the year | boi_met:mi5 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | N/A | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
| 34.10 | Total liabilities/Unrealized profit on instruments for year-end | boi_met:md701 | xbrli:monetaryItemType | instant | boi_BC:x2 | boi_CS:x2 | boi_FN:x1 | N/A | boi_MC:x3 | boi_MU:x1 | boi_NE:x3 | N/A | boi_PL:x48 | boi_PL:x40 | boi_RP:x24 | N/A | N/A | N/A |
Index
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Constraints