| r0.2 | label_boi_a2/Interest income / expenditure | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x1 | N/A | N/A | N/A |
| r0.3 | label_boi_a2/Income / expenditure ratio | boi_met:pd90 | num:percentItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x1 | N/A | N/A | N/A |
| r0.5 | label_boi_a2/Interest income / expenditure | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x2 | N/A | N/A | N/A |
| r0.6 | label_boi_a2/Income / expenditure ratio | boi_met:pd90 | num:percentItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x2 | N/A | N/A | N/A |
| r0.8 | label_boi_a2/Interest income / expenditure | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | N/A | N/A | N/A | N/A |
| r0.9 | label_boi_a2/Income / expenditure ratio | boi_met:pd90 | num:percentItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | N/A | N/A | N/A | N/A |
| 30.2 | Net return on interest-bearing assets/Interest income / expenditure | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x1 | boi_MC:x125 | boi_MC:x52 | boi_MU:x1 |
| 30.3 | Net return on interest-bearing assets/Income / expenditure ratio | boi_met:pd90 | num:percentItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x1 | boi_MC:x125 | boi_MC:x52 | boi_MU:x1 |
| 30.5 | Net return on interest-bearing assets/Interest income / expenditure | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x2 | boi_MC:x125 | boi_MC:x52 | boi_MU:x1 |
| 30.6 | Net return on interest-bearing assets/Income / expenditure ratio | boi_met:pd90 | num:percentItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | boi_GA:x2 | boi_MC:x125 | boi_MC:x52 | boi_MU:x1 |
| 30.8 | Net return on interest-bearing assets/Interest income / expenditure | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | N/A | boi_MC:x125 | boi_MC:x52 | boi_MU:x1 |
| 30.9 | Net return on interest-bearing assets/Income / expenditure ratio | boi_met:pd90 | num:percentItemType | instant | boi_BC:x11 | boi_CS:x2 | boi_CU:x15 | N/A | boi_MC:x125 | boi_MC:x52 | boi_MU:x1 |