| r0.1 | label_boi_a2/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x220 | boi_ST:x212 |
| r0.2 | label_boi_a2/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x220 | boi_ST:x212 |
| r0.3 | label_boi_a2/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x7 | boi_ST:x212 |
| r0.4 | label_boi_a2/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r0.5 | label_boi_a2/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r0.6 | label_boi_a2/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r1.1 | Activity of borrowers in Israel/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x220 | boi_ST:x212 |
| r1.2 | Activity of borrowers in Israel/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x220 | boi_ST:x212 |
| r1.3 | Activity of borrowers in Israel/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x7 | boi_ST:x212 |
| r1.4 | Activity of borrowers in Israel/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r1.5 | Activity of borrowers in Israel/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r1.6 | Activity of borrowers in Israel/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| 1.1 | Construction and real estate/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x47 | boi_ST:x220 | boi_ST:x212 |
| 1.2 | Construction and real estate/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x47 | boi_ST:x220 | boi_ST:x212 |
| 1.3 | Construction and real estate/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x47 | boi_ST:x7 | boi_ST:x212 |
| 1.4 | Construction and real estate/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x47 | N/A | boi_ST:x212 |
| 1.5 | Construction and real estate/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x47 | N/A | boi_ST:x212 |
| 1.6 | Construction and real estate/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x47 | N/A | boi_ST:x212 |
| 2.1 | Commercial - other/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x365 | boi_ST:x220 | boi_ST:x212 |
| 2.2 | Commercial - other/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x365 | boi_ST:x220 | boi_ST:x212 |
| 2.3 | Commercial - other/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x365 | boi_ST:x7 | boi_ST:x212 |
| 2.4 | Commercial - other/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x365 | N/A | boi_ST:x212 |
| 2.5 | Commercial - other/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x365 | N/A | boi_ST:x212 |
| 2.6 | Commercial - other/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x365 | N/A | boi_ST:x212 |
| 3.1 | Total commercial/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x4 | boi_ST:x220 | boi_ST:x212 |
| 3.2 | Total commercial/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x4 | boi_ST:x220 | boi_ST:x212 |
| 3.3 | Total commercial/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x4 | boi_ST:x7 | boi_ST:x212 |
| 3.4 | Total commercial/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x212 |
| 3.5 | Total commercial/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x212 |
| 3.6 | Total commercial/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x4 | N/A | boi_ST:x212 |
| 4.1 | Private individuals - housing loans/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x220 | boi_ST:x212 |
| 4.2 | Private individuals - housing loans/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x220 | boi_ST:x212 |
| 4.3 | Private individuals - housing loans/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x7 | boi_ST:x212 |
| 4.4 | Private individuals - housing loans/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 4.5 | Private individuals - housing loans/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 4.6 | Private individuals - housing loans/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 5.1 | Private individuals - other/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x220 | boi_ST:x212 |
| 5.2 | Private individuals - other/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x220 | boi_ST:x212 |
| 5.3 | Private individuals - other/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | boi_ST:x7 | boi_ST:x212 |
| 5.4 | Private individuals - other/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 5.5 | Private individuals - other/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 5.6 | Private individuals - other/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x15 | N/A | boi_ST:x212 |
| 6.1 | Total public - activity in Israel/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 6.2 | Total public - activity in Israel/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 6.3 | Total public - activity in Israel/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x7 | boi_ST:x212 |
| 6.4 | Total public - activity in Israel/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 6.5 | Total public - activity in Israel/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 6.6 | Total public - activity in Israel/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| r8.1 | Activity of borrowers abroad/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x220 | boi_ST:x212 |
| r8.2 | Activity of borrowers abroad/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x220 | boi_ST:x212 |
| r8.3 | Activity of borrowers abroad/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | boi_ST:x7 | boi_ST:x212 |
| r8.4 | Activity of borrowers abroad/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r8.5 | Activity of borrowers abroad/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| r8.6 | Activity of borrowers abroad/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | N/A | N/A | boi_ST:x212 |
| 7.1 | Total public - activity abroad/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 7.2 | Total public - activity abroad/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 7.3 | Total public - activity abroad/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x7 | boi_ST:x212 |
| 7.4 | Total public - activity abroad/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 7.5 | Total public - activity abroad/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 7.6 | Total public - activity abroad/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 8.1 | Total/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 8.2 | Total/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 8.3 | Total/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | boi_ST:x7 | boi_ST:x212 |
| 8.4 | Total/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 8.5 | Total/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 8.6 | Total/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 9.1 | Of which: Measured according to present value of cash flows/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x98 | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 9.2 | Of which: Measured according to present value of cash flows/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x98 | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 9.3 | Of which: Measured according to present value of cash flows/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x98 | boi_RP:x24 | boi_SE:x16 | boi_ST:x7 | boi_ST:x212 |
| 9.4 | Of which: Measured according to present value of cash flows/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x98 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 9.5 | Of which: Measured according to present value of cash flows/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x98 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 9.6 | Of which: Measured according to present value of cash flows/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | boi_PL:x98 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 10.1 | Of which: Measured individually by fair value of security/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x99 | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 10.2 | Of which: Measured individually by fair value of security/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x99 | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 10.3 | Of which: Measured individually by fair value of security/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x99 | boi_RP:x24 | boi_SE:x16 | boi_ST:x7 | boi_ST:x212 |
| 10.4 | Of which: Measured individually by fair value of security/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x99 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 10.5 | Of which: Measured individually by fair value of security/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x99 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 10.6 | Of which: Measured individually by fair value of security/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | boi_PL:x99 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 11.1 | Of which: Measured on group basis/Balance of debts for which individual provision exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x100 | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 11.2 | Of which: Measured on group basis/Balance of individual allowance | boi_met:mi3 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x100 | boi_RP:x24 | boi_SE:x16 | boi_ST:x220 | boi_ST:x212 |
| 11.3 | Of which: Measured on group basis/Contractual balance of impaired debts for which no individual allowance exists | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x100 | boi_RP:x24 | boi_SE:x16 | boi_ST:x7 | boi_ST:x212 |
| 11.4 | Of which: Measured on group basis/Total balance of impaired debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x100 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 11.5 | Of which: Measured on group basis/Contractual balance of impaired debts | boi_met:mi9 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | N/A | N/A | boi_PL:x100 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |
| 11.6 | Of which: Measured on group basis/Interest income posted | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | N/A | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | boi_PL:x100 | boi_RP:x24 | boi_SE:x16 | N/A | boi_ST:x212 |