| r0.1 | label_boi_a2/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r0.2 | label_boi_a2/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r0.3 | label_boi_a2/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r0.4 | label_boi_a2/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r0.5 | label_boi_a2/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r1.1 | Parallel changes/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r1.2 | Parallel changes/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r1.3 | Parallel changes/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r1.4 | Parallel changes/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r1.5 | Parallel changes/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 10.1 | A parallel increase of 1%/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | N/A | boi_RP:x24 |
| 10.2 | A parallel increase of 1%/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | N/A | boi_RP:x24 |
| 10.3 | A parallel increase of 1%/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | N/A | boi_RP:x24 |
| 10.4 | A parallel increase of 1%/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | N/A | boi_RP:x24 |
| 10.5 | A parallel increase of 1%/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | N/A | boi_RP:x24 |
| 11.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | boi_PL:x66 | boi_RP:x24 |
| 11.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | boi_PL:x66 | boi_RP:x24 |
| 11.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | boi_PL:x66 | boi_RP:x24 |
| 11.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | boi_PL:x66 | boi_RP:x24 |
| 11.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x1 | boi_PL:x66 | boi_RP:x24 |
| 12.1 | A parallel decline of 1%/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | N/A | boi_RP:x24 |
| 12.2 | A parallel decline of 1%/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | N/A | boi_RP:x24 |
| 12.3 | A parallel decline of 1%/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | N/A | boi_RP:x24 |
| 12.4 | A parallel decline of 1%/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | N/A | boi_RP:x24 |
| 12.5 | A parallel decline of 1%/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | N/A | boi_RP:x24 |
| 13.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | boi_PL:x66 | boi_RP:x24 |
| 13.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | boi_PL:x66 | boi_RP:x24 |
| 13.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | boi_PL:x66 | boi_RP:x24 |
| 13.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | boi_PL:x66 | boi_RP:x24 |
| 13.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x3 | boi_PL:x66 | boi_RP:x24 |
| r6.1 | Non-parallel changes/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r6.2 | Non-parallel changes/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r6.3 | Non-parallel changes/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r6.4 | Non-parallel changes/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| r6.5 | Non-parallel changes/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 14.1 | Steepening/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | N/A | boi_RP:x24 |
| 14.2 | Steepening/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | N/A | boi_RP:x24 |
| 14.3 | Steepening/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | N/A | boi_RP:x24 |
| 14.4 | Steepening/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | N/A | boi_RP:x24 |
| 14.5 | Steepening/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | N/A | boi_RP:x24 |
| 15.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | boi_PL:x66 | boi_RP:x24 |
| 15.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | boi_PL:x66 | boi_RP:x24 |
| 15.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | boi_PL:x66 | boi_RP:x24 |
| 15.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | boi_PL:x66 | boi_RP:x24 |
| 15.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x70 | boi_PL:x66 | boi_RP:x24 |
| 16.1 | Leveling/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | N/A | boi_RP:x24 |
| 16.2 | Leveling/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | N/A | boi_RP:x24 |
| 16.3 | Leveling/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | N/A | boi_RP:x24 |
| 16.4 | Leveling/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | N/A | boi_RP:x24 |
| 16.5 | Leveling/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | N/A | boi_RP:x24 |
| 17.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | boi_PL:x66 | boi_RP:x24 |
| 17.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | boi_PL:x66 | boi_RP:x24 |
| 17.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | boi_PL:x66 | boi_RP:x24 |
| 17.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | boi_PL:x66 | boi_RP:x24 |
| 17.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x71 | boi_PL:x66 | boi_RP:x24 |
| 18.1 | Interest rate increase in the short term/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 18.2 | Interest rate increase in the short term/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 18.3 | Interest rate increase in the short term/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 18.4 | Interest rate increase in the short term/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 18.5 | Interest rate increase in the short term/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | N/A | N/A | boi_RP:x24 |
| 19.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | boi_PL:x66 | boi_RP:x24 |
| 19.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | boi_PL:x66 | boi_RP:x24 |
| 19.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | boi_PL:x66 | boi_RP:x24 |
| 19.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | N/A | boi_PL:x66 | boi_RP:x24 |
| 19.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | N/A | boi_PL:x66 | boi_RP:x24 |
| 20.1 | Interest rate decline in the short term/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | N/A | boi_RP:x24 |
| 20.2 | Interest rate decline in the short term/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | N/A | boi_RP:x24 |
| 20.3 | Interest rate decline in the short term/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | N/A | boi_RP:x24 |
| 20.4 | Interest rate decline in the short term/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | N/A | boi_RP:x24 |
| 20.5 | Interest rate decline in the short term/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | N/A | boi_RP:x24 |
| 21.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | boi_PL:x66 | boi_RP:x24 |
| 21.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | boi_PL:x66 | boi_RP:x24 |
| 21.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | boi_PL:x66 | boi_RP:x24 |
| 21.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | boi_PL:x66 | boi_RP:x24 |
| 21.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x73 | boi_PL:x66 | boi_RP:x24 |
| 22.1 | Maximum/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | N/A | boi_RP:x24 |
| 22.2 | Maximum/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | N/A | boi_RP:x24 |
| 22.3 | Maximum/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | N/A | boi_RP:x24 |
| 22.4 | Maximum/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | N/A | boi_RP:x24 |
| 22.5 | Maximum/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | N/A | boi_RP:x24 |
| 23.1 | of which: banking portfolio/Non-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x5 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | boi_PL:x66 | boi_RP:x24 |
| 23.2 | of which: banking portfolio/CPI-indexed | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x6 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | boi_PL:x66 | boi_RP:x24 |
| 23.3 | of which: banking portfolio/USD | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x16 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | boi_PL:x66 | boi_RP:x24 |
| 23.4 | of which: banking portfolio/Other | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | boi_CU:x33 | N/A | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | boi_PL:x66 | boi_RP:x24 |
| 23.5 | of which: banking portfolio/Total | boi_met:mi14 | xbrli:monetaryItemType | instant | boi_BC:x13 | boi_CS:x2 | N/A | boi_EF:x3 | boi_EF:x7 | boi_FN:x1 | boi_PI:x74 | boi_PL:x66 | boi_RP:x24 |