| r0.1 | label_boi_a2/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_GA:x1 | N/A | boi_MU:x1 |
| r0.2 | label_boi_a2/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_GA:x2 | N/A | boi_MU:x1 |
| r0.3 | label_boi_a2/Total | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | N/A | N/A | boi_MU:x1 |
| 1.1 | Interest income/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MU:x1 |
| 1.2 | Interest income/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MU:x1 |
| 1.3 | Interest income/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MU:x1 |
| 2.1 | Interest expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MU:x1 |
| 2.2 | Interest expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MU:x1 |
| 2.3 | Interest expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MU:x1 |
| 3.1 | Interest income, net/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MU:x1 |
| 3.2 | Interest income, net/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MU:x1 |
| 3.3 | Interest income, net/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MU:x1 |
| 4.1 | Credit loss expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x126 | boi_MU:x1 |
| 4.2 | Credit loss expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x126 | boi_MU:x1 |
| 4.3 | Credit loss expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | N/A | boi_CS:x2 | N/A | boi_MC:x126 | boi_MU:x1 |
| 5.1 | Net interest income after credit loss expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x124 | boi_MU:x1 |
| 5.2 | Net interest income after credit loss expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x124 | boi_MU:x1 |
| 5.3 | Net interest income after credit loss expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x124 | boi_MU:x1 |
| r6.1 | Non-interest income/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_GA:x1 | N/A | boi_MU:x1 |
| r6.2 | Non-interest income/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_GA:x2 | N/A | boi_MU:x1 |
| r6.3 | Non-interest income/Total | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | N/A | N/A | boi_MU:x1 |
| 6.1 | Non-interest financing income/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x128 | boi_MU:x1 |
| 6.2 | Non-interest financing income/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x128 | boi_MU:x1 |
| 6.3 | Non-interest financing income/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x128 | boi_MU:x1 |
| 7.1 | Fees/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x141 | boi_MU:x1 |
| 7.2 | Fees/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x141 | boi_MU:x1 |
| 7.3 | Fees/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x141 | boi_MU:x1 |
| 8.1 | Other income/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x153 | boi_MU:x1 |
| 8.2 | Other income/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x153 | boi_MU:x1 |
| 8.3 | Other income/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x153 | boi_MU:x1 |
| 9.1 | Total non-interest income/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x127 | boi_MU:x1 |
| 9.2 | Total non-interest income/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x127 | boi_MU:x1 |
| 9.3 | Total non-interest income/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x127 | boi_MU:x1 |
| r11.1 | Operating and other expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | N/A | boi_MU:x1 |
| r11.2 | Operating and other expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | N/A | boi_MU:x1 |
| r11.3 | Operating and other expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | N/A | boi_MU:x1 |
| 10.1 | Wages and related expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x161 | boi_MU:x1 |
| 10.2 | Wages and related expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x161 | boi_MU:x1 |
| 10.3 | Wages and related expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | boi_MC:x161 | boi_MU:x1 |
| 11.1 | Maintenance and depreciation of buildings and equipment/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x171 | boi_MU:x1 |
| 11.2 | Maintenance and depreciation of buildings and equipment/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x171 | boi_MU:x1 |
| 11.3 | Maintenance and depreciation of buildings and equipment/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | boi_MC:x171 | boi_MU:x1 |
| 12.1 | Amortization and devaluation of intangible assets and goodwill/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x172 | boi_MU:x1 |
| 12.2 | Amortization and devaluation of intangible assets and goodwill/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x172 | boi_MU:x1 |
| 12.3 | Amortization and devaluation of intangible assets and goodwill/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | boi_MC:x172 | boi_MU:x1 |
| 13.1 | Other expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x173 | boi_MU:x1 |
| 13.2 | Other expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x173 | boi_MU:x1 |
| 13.3 | Other expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | boi_MC:x173 | boi_MU:x1 |
| 14.1 | Total operating and other expenses/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x160 | boi_MU:x1 |
| 14.2 | Total operating and other expenses/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x160 | boi_MU:x1 |
| 14.3 | Total operating and other expenses/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | N/A | boi_CS:x2 | N/A | boi_MC:x160 | boi_MU:x1 |
| 15.1 | Pre-tax profit/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x123 | boi_MU:x1 |
| 15.2 | Pre-tax profit/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x123 | boi_MU:x1 |
| 15.3 | Pre-tax profit/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x123 | boi_MU:x1 |
| 16.1 | Provision for taxes on profit/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x190 | boi_MU:x1 |
| 16.2 | Provision for taxes on profit/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x190 | boi_MU:x1 |
| 16.3 | Provision for taxes on profit/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x12 | N/A | boi_CS:x2 | N/A | boi_MC:x190 | boi_MU:x1 |
| 17.1 | Post-tax profit/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x122 | boi_MU:x1 |
| 17.2 | Post-tax profit/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x122 | boi_MU:x1 |
| 17.3 | Post-tax profit/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x122 | boi_MU:x1 |
| 18.1 | Banking corporation's share in profit after effect of tax of held companies/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x191 | boi_MU:x1 |
| 18.2 | Banking corporation's share in profit after effect of tax of held companies/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x191 | boi_MU:x1 |
| 18.3 | Banking corporation's share in profit after effect of tax of held companies/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x191 | boi_MU:x1 |
| r21.1 | Net profit/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x121 | boi_MU:x1 |
| r21.2 | Net profit/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x121 | boi_MU:x1 |
| r21.3 | Net profit/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x121 | boi_MU:x1 |
| 19.1 | Before attribution to holders of noncontrolling rights/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x121 | boi_MU:x1 |
| 19.2 | Before attribution to holders of noncontrolling rights/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x121 | boi_MU:x1 |
| 19.3 | Before attribution to holders of noncontrolling rights/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | N/A | boi_CS:x2 | N/A | boi_MC:x121 | boi_MU:x1 |
| 20.1 | Attributed to holders of noncontrolling rights/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CN:x2 | boi_CS:x2 | boi_GA:x1 | boi_MC:x121 | boi_MU:x1 |
| 20.2 | Attributed to holders of noncontrolling rights/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CN:x2 | boi_CS:x2 | boi_GA:x2 | boi_MC:x121 | boi_MU:x1 |
| 20.3 | Attributed to holders of noncontrolling rights/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CN:x2 | boi_CS:x2 | N/A | boi_MC:x121 | boi_MU:x1 |
| 21.1 | Attributed to banking corporation's shareholders/Activity in Israel | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CN:x1 | boi_CS:x2 | boi_GA:x1 | boi_MC:x121 | boi_MU:x1 |
| 21.2 | Attributed to banking corporation's shareholders/Activity abroad | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CN:x1 | boi_CS:x2 | boi_GA:x2 | boi_MC:x121 | boi_MU:x1 |
| 21.3 | Attributed to banking corporation's shareholders/Total | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CN:x1 | boi_CS:x2 | N/A | boi_MC:x121 | boi_MU:x1 |