| r0.1 | label_boi_a2/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | N/A |
| r0.2 | label_boi_a2/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | N/A |
| r0.3 | label_boi_a2/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | N/A |
| 1.1 | Total non-settled transactions/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | N/A |
| 1.2 | Total non-settled transactions/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | N/A |
| 1.3 | Total non-settled transactions/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | N/A |
| 2.1 | Non-settled transactions up to 4 days (0% risk multiplier)/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x24 |
| 2.2 | Non-settled transactions up to 4 days (0% risk multiplier)/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x24 |
| 2.3 | Non-settled transactions up to 4 days (0% risk multiplier)/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x24 |
| 3.1 | Non-settled transactions 5-15 days (8% risk multiplier)/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x25 |
| 3.2 | Non-settled transactions 5-15 days (8% risk multiplier)/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x25 |
| 3.3 | Non-settled transactions 5-15 days (8% risk multiplier)/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x25 |
| 4.1 | Non-settled transactions 16-30 days (50% risk multiplier)/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x26 |
| 4.2 | Non-settled transactions 16-30 days (50% risk multiplier)/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x26 |
| 4.3 | Non-settled transactions 16-30 days (50% risk multiplier)/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x26 |
| 5.1 | Non-settled transactions 31-45 days (75% risk multiplier)/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x27 |
| 5.2 | Non-settled transactions 31-45 days (75% risk multiplier)/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x27 |
| 5.3 | Non-settled transactions 31-45 days (75% risk multiplier)/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x27 |
| 6.1 | Non-settled transactions 46+ days (100% risk multiplier)/Non-settled transactions at settlement price | boi_met:mi33 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x28 |
| 6.2 | Non-settled transactions 46+ days (100% risk multiplier)/Positive current exposure due to non-settlement of transactions | boi_met:mi32 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x28 |
| 6.3 | Non-settled transactions 46+ days (100% risk multiplier)/Capital requirement | boi_met:mi31 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_MC:x55 | boi_RT:x2 | boi_TI:x28 |