| r0.1 | label_boi_a2/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x5 |
| r0.2 | label_boi_a2/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x16 |
| r0.3 | label_boi_a2/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x85 |
| r0.4 | label_boi_a2/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x19 |
| r0.5 | label_boi_a2/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | N/A |
| r1.1 | Interest contracts/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x5 |
| r1.2 | Interest contracts/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x16 |
| r1.3 | Interest contracts/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x85 |
| r1.4 | Interest contracts/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x19 |
| r1.5 | Interest contracts/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | N/A |
| 1.1 | NIS CPI/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x12 | boi_TI:x5 |
| 1.2 | NIS CPI/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x12 | boi_TI:x16 |
| 1.3 | NIS CPI/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x12 | boi_TI:x85 |
| 1.4 | NIS CPI/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x12 | boi_TI:x19 |
| 1.5 | NIS CPI/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x12 | N/A |
| 2.1 | Other/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x13 | boi_TI:x5 |
| 2.2 | Other/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x13 | boi_TI:x16 |
| 2.3 | Other/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x13 | boi_TI:x85 |
| 2.4 | Other/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x13 | boi_TI:x19 |
| 2.5 | Other/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x13 | N/A |
| 3.1 | Foreign currency contracts/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x10 | boi_TI:x5 |
| 3.2 | Foreign currency contracts/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x10 | boi_TI:x16 |
| 3.3 | Foreign currency contracts/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x10 | boi_TI:x85 |
| 3.4 | Foreign currency contracts/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x10 | boi_TI:x19 |
| 3.5 | Foreign currency contracts/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x10 | N/A |
| 4.1 | Contracts on account of shares/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x9 | boi_TI:x5 |
| 4.2 | Contracts on account of shares/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x9 | boi_TI:x16 |
| 4.3 | Contracts on account of shares/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x9 | boi_TI:x85 |
| 4.4 | Contracts on account of shares/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x9 | boi_TI:x19 |
| 4.5 | Contracts on account of shares/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x9 | N/A |
| 5.1 | Commodity and other contracts/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x16 | boi_TI:x5 |
| 5.2 | Commodity and other contracts/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x16 | boi_TI:x16 |
| 5.3 | Commodity and other contracts/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x16 | boi_TI:x85 |
| 5.4 | Commodity and other contracts/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x16 | boi_TI:x19 |
| 5.5 | Commodity and other contracts/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | boi_RT:x16 | N/A |
| 6.1 | Total - to be reported only by those who did not complete the entire table/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x5 |
| 6.2 | Total - to be reported only by those who did not complete the entire table/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x16 |
| 6.3 | Total - to be reported only by those who did not complete the entire table/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x85 |
| 6.4 | Total - to be reported only by those who did not complete the entire table/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x19 |
| 6.5 | Total - to be reported only by those who did not complete the entire table/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | N/A |
| 7.1 | Total/Up to 3 mo. | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x5 |
| 7.2 | Total/> 3 mo. to 1Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x16 |
| 7.3 | Total/> 1Y to 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x85 |
| 7.4 | Total/> 5Y | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | boi_TI:x19 |
| 7.5 | Total/Total | boi_met:mi204 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_MC:x18 | boi_RP:x24 | N/A | N/A |