| r0.1 | label_boi_a2/Number of borrowers | boi_met:id89 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MU:x1 | boi_RP:x24 | boi_SE:x89 |
| r0.2 | label_boi_a2/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | N/A | boi_RP:x24 | boi_SE:x89 |
| r0.3 | label_boi_a2/Thereof: w/bank guarantee | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x1 | boi_CS:x2 | N/A | N/A | boi_RP:x24 | boi_SE:x89 |
| r0.4 | label_boi_a2/Credit risk | boi_met:mi699 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | N/A | N/A | boi_RP:x24 | boi_SE:x89 |
| 21.1 | Income due and other sums receivable/Number of borrowers | boi_met:id89 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x985 | boi_MU:x1 | boi_RP:x24 | boi_SE:x89 |
| 21.2 | Income due and other sums receivable/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x985 | N/A | boi_RP:x24 | boi_SE:x89 |
| 21.3 | Income due and other sums receivable/Thereof: w/bank guarantee | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x1 | boi_CS:x2 | boi_MC:x985 | N/A | boi_RP:x24 | boi_SE:x89 |
| 21.4 | Income due and other sums receivable/Credit risk | boi_met:mi699 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_MC:x985 | N/A | boi_RP:x24 | boi_SE:x89 |
| 22.1 | Total/Number of borrowers | boi_met:id89 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x585 | boi_MU:x1 | boi_RP:x24 | boi_SE:x89 |
| 22.2 | Total/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x585 | N/A | boi_RP:x24 | boi_SE:x89 |
| 22.3 | Total/Thereof: w/bank guarantee | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x1 | boi_CS:x2 | boi_MC:x585 | N/A | boi_RP:x24 | boi_SE:x89 |
| 22.4 | Total/Credit risk | boi_met:mi699 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_MC:x585 | N/A | boi_RP:x24 | boi_SE:x89 |
| 23.1 | Of which: borrowers' bonds/Number of borrowers | boi_met:id89 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x584 | boi_MU:x1 | boi_RP:x24 | boi_SE:x89 |
| 23.2 | Of which: borrowers' bonds/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_MC:x584 | N/A | boi_RP:x24 | boi_SE:x89 |
| 23.3 | Of which: borrowers' bonds/Thereof: w/bank guarantee | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x1 | boi_CS:x2 | boi_MC:x584 | N/A | boi_RP:x24 | boi_SE:x89 |
| 23.4 | Of which: borrowers' bonds/Credit risk | boi_met:mi699 | xbrli:monetaryItemType | instant | N/A | N/A | boi_CS:x2 | boi_MC:x584 | N/A | boi_RP:x24 | boi_SE:x89 |