| r0.1 | label_boi_a2/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | N/A |
| r0.2 | label_boi_a2/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | N/A | boi_ST:x40 | N/A |
| r0.3 | label_boi_a2/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x2 |
| r0.4 | label_boi_a2/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r0.5 | label_boi_a2/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | N/A | N/A | N/A |
| r0.6 | label_boi_a2/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | N/A | N/A | N/A |
| r0.7 | label_boi_a2/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x916 | N/A | boi_RP:x24 | N/A | N/A | N/A |
| r1.1 | Activity of borrowers in Israel/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | N/A |
| r1.2 | Activity of borrowers in Israel/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | boi_ST:x40 | N/A |
| r1.3 | Activity of borrowers in Israel/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x2 |
| r1.4 | Activity of borrowers in Israel/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r1.5 | Activity of borrowers in Israel/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | N/A | N/A | N/A |
| r1.6 | Activity of borrowers in Israel/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | N/A | N/A | N/A |
| r1.7 | Activity of borrowers in Israel/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | N/A | N/A | N/A |
| 1.1 | Manufacturing/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x289 | N/A | N/A |
| 1.2 | Manufacturing/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x289 | boi_ST:x40 | N/A |
| 1.3 | Manufacturing/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x289 | N/A | boi_ST:x2 |
| 1.4 | Manufacturing/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x289 | N/A | boi_ST:x212 |
| 1.5 | Manufacturing/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x289 | N/A | N/A |
| 1.6 | Manufacturing/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x289 | N/A | N/A |
| 1.7 | Manufacturing/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x289 | N/A | N/A |
| 2.1 | Construction and real estate-construction/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x8 | N/A | N/A |
| 2.2 | Construction and real estate-construction/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x8 | boi_ST:x40 | N/A |
| 2.3 | Construction and real estate-construction/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x2 |
| 2.4 | Construction and real estate-construction/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x8 | N/A | boi_ST:x212 |
| 2.5 | Construction and real estate-construction/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x8 | N/A | N/A |
| 2.6 | Construction and real estate-construction/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x8 | N/A | N/A |
| 2.7 | Construction and real estate-construction/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x8 | N/A | N/A |
| 3.1 | Of which: Housing loans extended to specific purchase groups/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x79 | N/A | N/A |
| 3.2 | Of which: Housing loans extended to specific purchase groups/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x79 | boi_ST:x40 | N/A |
| 3.3 | Of which: Housing loans extended to specific purchase groups/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x79 | N/A | boi_ST:x2 |
| 3.4 | Of which: Housing loans extended to specific purchase groups/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x79 | N/A | boi_ST:x212 |
| 3.5 | Of which: Housing loans extended to specific purchase groups/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x79 | N/A | N/A |
| 3.6 | Of which: Housing loans extended to specific purchase groups/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x79 | N/A | N/A |
| 3.7 | Of which: Housing loans extended to specific purchase groups/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x79 | N/A | N/A |
| 4.1 | Construction and real estate-real estate activity/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x7 | N/A | N/A |
| 4.2 | Construction and real estate-real estate activity/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x7 | boi_ST:x40 | N/A |
| 4.3 | Construction and real estate-real estate activity/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x2 |
| 4.4 | Construction and real estate-real estate activity/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x7 | N/A | boi_ST:x212 |
| 4.5 | Construction and real estate-real estate activity/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x7 | N/A | N/A |
| 4.6 | Construction and real estate-real estate activity/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x7 | N/A | N/A |
| 4.7 | Construction and real estate-real estate activity/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x7 | N/A | N/A |
| 5.1 | Trade/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x106 | N/A | N/A |
| 5.2 | Trade/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x106 | boi_ST:x40 | N/A |
| 5.3 | Trade/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x106 | N/A | boi_ST:x2 |
| 5.4 | Trade/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x106 | N/A | boi_ST:x212 |
| 5.5 | Trade/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x106 | N/A | N/A |
| 5.6 | Trade/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x106 | N/A | N/A |
| 5.7 | Trade/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x106 | N/A | N/A |
| 6.1 | Financial services/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x36 | N/A | N/A |
| 6.2 | Financial services/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x36 | boi_ST:x40 | N/A |
| 6.3 | Financial services/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x2 |
| 6.4 | Financial services/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x36 | N/A | boi_ST:x212 |
| 6.5 | Financial services/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x36 | N/A | N/A |
| 6.6 | Financial services/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x36 | N/A | N/A |
| 6.7 | Financial services/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x36 | N/A | N/A |
| 7.1 | Other sectors/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x357 | N/A | N/A |
| 7.2 | Other sectors/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x357 | boi_ST:x40 | N/A |
| 7.3 | Other sectors/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x357 | N/A | boi_ST:x2 |
| 7.4 | Other sectors/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x357 | N/A | boi_ST:x212 |
| 7.5 | Other sectors/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x357 | N/A | N/A |
| 7.6 | Other sectors/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x357 | N/A | N/A |
| 7.7 | Other sectors/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x357 | N/A | N/A |
| 8.1 | Total trade/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | N/A |
| 8.2 | Total trade/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x4 | boi_ST:x40 | N/A |
| 8.3 | Total trade/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x2 |
| 8.4 | Total trade/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x212 |
| 8.5 | Total trade/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x4 | N/A | N/A |
| 8.6 | Total trade/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x4 | N/A | N/A |
| 8.7 | Total trade/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | N/A |
| 9.1 | Private individuals-housing loans/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 9.2 | Private individuals-housing loans/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x40 | N/A |
| 9.3 | Private individuals-housing loans/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x2 |
| 9.4 | Private individuals-housing loans/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 9.5 | Private individuals-housing loans/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 9.6 | Private individuals-housing loans/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 9.7 | Private individuals-housing loans/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 10.1 | Private individuals-other/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 10.2 | Private individuals-other/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x40 | N/A |
| 10.3 | Private individuals-other/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x2 |
| 10.4 | Private individuals-other/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 10.5 | Private individuals-other/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 10.6 | Private individuals-other/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 10.7 | Private individuals-other/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 11.1 | Total public-activity in israel/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 11.2 | Total public-activity in israel/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x40 | N/A |
| 11.3 | Total public-activity in israel/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x2 |
| 11.4 | Total public-activity in israel/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 11.5 | Total public-activity in israel/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 11.6 | Total public-activity in israel/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 11.7 | Total public-activity in israel/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 12.1 | Banks in Israel/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 12.2 | Banks in Israel/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | boi_ST:x40 | N/A |
| 12.3 | Banks in Israel/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | boi_ST:x2 |
| 12.4 | Banks in Israel/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | boi_ST:x212 |
| 12.5 | Banks in Israel/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 12.6 | Banks in Israel/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 12.7 | Banks in Israel/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 13.1 | Total activity in israel/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 13.2 | Total activity in israel/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | boi_ST:x40 | N/A |
| 13.3 | Total activity in israel/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | boi_ST:x2 |
| 13.4 | Total activity in israel/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | boi_ST:x212 |
| 13.5 | Total activity in israel/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 13.6 | Total activity in israel/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 13.7 | Total activity in israel/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| r15.1 | Activity of borrowers abroad/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | N/A |
| r15.2 | Activity of borrowers abroad/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | boi_ST:x40 | N/A |
| r15.3 | Activity of borrowers abroad/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x2 |
| r15.4 | Activity of borrowers abroad/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r15.5 | Activity of borrowers abroad/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | N/A | N/A | N/A |
| r15.6 | Activity of borrowers abroad/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | N/A | N/A | N/A |
| r15.7 | Activity of borrowers abroad/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | N/A | boi_RP:x24 | N/A | N/A | N/A |
| 14.1 | Total public - activity abroad/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 14.2 | Total public - activity abroad/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x40 | N/A |
| 14.3 | Total public - activity abroad/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x2 |
| 14.4 | Total public - activity abroad/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 14.5 | Total public - activity abroad/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 14.6 | Total public - activity abroad/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 14.7 | Total public - activity abroad/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 15.1 | Banks abroad and Foreign governments/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 15.2 | Banks abroad and Foreign governments/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | boi_ST:x40 | N/A |
| 15.3 | Banks abroad and Foreign governments/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | boi_ST:x2 |
| 15.4 | Banks abroad and Foreign governments/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | boi_ST:x212 |
| 15.5 | Banks abroad and Foreign governments/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 15.6 | Banks abroad and Foreign governments/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 15.7 | Banks abroad and Foreign governments/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x356 | N/A | N/A |
| 16.1 | Total activity abroad/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 16.2 | Total activity abroad/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | boi_ST:x40 | N/A |
| 16.3 | Total activity abroad/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | boi_ST:x2 |
| 16.4 | Total activity abroad/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | boi_ST:x212 |
| 16.5 | Total activity abroad/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 16.6 | Total activity abroad/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 16.7 | Total activity abroad/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 17.1 | Total/Total | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 17.2 | Total/Credit performance rating | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | boi_ST:x40 | N/A |
| 17.3 | Total/Problem | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | boi_ST:x2 |
| 17.4 | Total/Nonperforming | boi_met:mi468 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x928 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | boi_ST:x212 |
| 17.5 | Total/Expense on credit losses | boi_met:md191 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 17.6 | Total/Net accounting write-offs | boi_met:md285 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x916 | boi_MU:x1 | boi_RP:x24 | boi_SE:x92 | N/A | N/A |
| 17.7 | Total/Balance of loan loss allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x28 | N/A | boi_CS:x2 | N/A | boi_MC:x916 | N/A | boi_RP:x24 | boi_SE:x92 | N/A | N/A |