| r0.1 | label_boi_a2/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.2 | label_boi_a2/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.3 | label_boi_a2/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.4 | label_boi_a2/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.5 | label_boi_a2/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.6 | label_boi_a2/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.7 | label_boi_a2/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.8 | label_boi_a2/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.9 | label_boi_a2/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.10 | label_boi_a2/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.11 | label_boi_a2/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.12 | label_boi_a2/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.13 | label_boi_a2/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r0.14 | label_boi_a2/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| 1.1 | A. Total of all exposures/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.2 | A. Total of all exposures/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.3 | A. Total of all exposures/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.4 | A. Total of all exposures/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.5 | A. Total of all exposures/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.6 | A. Total of all exposures/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.7 | A. Total of all exposures/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.8 | A. Total of all exposures/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.9 | A. Total of all exposures/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.10 | A. Total of all exposures/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.11 | A. Total of all exposures/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.12 | A. Total of all exposures/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.13 | A. Total of all exposures/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 1.14 | A. Total of all exposures/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r2.1 | B. Breakdown of exposures by exposure type/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.2 | B. Breakdown of exposures by exposure type/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.3 | B. Breakdown of exposures by exposure type/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.4 | B. Breakdown of exposures by exposure type/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.5 | B. Breakdown of exposures by exposure type/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.6 | B. Breakdown of exposures by exposure type/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.7 | B. Breakdown of exposures by exposure type/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.8 | B. Breakdown of exposures by exposure type/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.9 | B. Breakdown of exposures by exposure type/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.10 | B. Breakdown of exposures by exposure type/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.11 | B. Breakdown of exposures by exposure type/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.12 | B. Breakdown of exposures by exposure type/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.13 | B. Breakdown of exposures by exposure type/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| r2.14 | B. Breakdown of exposures by exposure type/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | N/A | N/A | boi_RT:x1 |
| 2.1 | Cash/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.2 | Cash/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.3 | Cash/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.4 | Cash/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.5 | Cash/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.6 | Cash/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.7 | Cash/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.8 | Cash/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.9 | Cash/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.10 | Cash/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.11 | Cash/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.12 | Cash/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.13 | Cash/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 2.14 | Cash/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x7 | N/A | boi_RT:x1 |
| 3.1 | Gold/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.2 | Gold/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.3 | Gold/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.4 | Gold/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.5 | Gold/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.6 | Gold/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.7 | Gold/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.8 | Gold/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.9 | Gold/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.10 | Gold/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.11 | Gold/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.12 | Gold/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.13 | Gold/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 3.14 | Gold/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x961 | N/A | boi_RT:x1 |
| 4.1 | Shares/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.2 | Shares/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.3 | Shares/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.4 | Shares/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.5 | Shares/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.6 | Shares/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.7 | Shares/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.8 | Shares/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.9 | Shares/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.10 | Shares/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.11 | Shares/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.12 | Shares/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.13 | Shares/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 4.14 | Shares/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x963 | N/A | boi_RT:x1 |
| 5.1 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.2 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.3 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.4 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.5 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.6 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.7 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.8 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.9 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.10 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.11 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.12 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.13 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 5.14 | Capital investments in financial corporations that do not exceed 10% of financial corporation capital and are not subtracted from capital/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x964 | N/A | boi_RT:x1 |
| 6.1 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.2 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.3 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.4 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.5 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.6 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.7 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.8 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.9 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.10 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.11 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.12 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.13 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 6.14 | Capital investments in financial corporations that exceed 10% of financial corporation capital and are not subtracted from capital/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x965 | N/A | boi_RT:x1 |
| 7.1 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.2 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.3 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.4 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.5 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.6 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.7 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.8 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.9 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.10 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.11 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.12 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.13 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 7.14 | Surplus investments exceeding 5% of banking corporation's Tier 1 equity in individual non-financial corporation/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x966 | N/A | boi_RT:x1 |
| 8.1 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.2 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.3 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.4 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.5 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.6 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.7 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.8 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.9 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.10 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.11 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.12 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.13 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 8.14 | Surplus investments exceeding 20% of any type of means of control in non-financial corporations/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x967 | N/A | boi_RT:x1 |
| 9.1 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.2 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.3 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.4 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.5 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.6 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.7 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.8 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.9 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.10 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.11 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.12 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.13 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 9.14 | Non-payment/non-handover of transactions that are not delivery-versus-payment and transactions that are not payment-versus-payment/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x968 | N/A | boi_RT:x1 |
| 10.1 | Deferred taxes/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.2 | Deferred taxes/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.3 | Deferred taxes/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.4 | Deferred taxes/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.5 | Deferred taxes/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.6 | Deferred taxes/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.7 | Deferred taxes/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.8 | Deferred taxes/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.9 | Deferred taxes/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.10 | Deferred taxes/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.11 | Deferred taxes/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.12 | Deferred taxes/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.13 | Deferred taxes/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 10.14 | Deferred taxes/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x430 | N/A | boi_RT:x1 |
| 11.1 | Other assets/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.2 | Other assets/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.3 | Other assets/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.4 | Other assets/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.5 | Other assets/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.6 | Other assets/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.7 | Other assets/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.8 | Other assets/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.9 | Other assets/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.10 | Other assets/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.11 | Other assets/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.12 | Other assets/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.13 | Other assets/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 11.14 | Other assets/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x969 | N/A | boi_RT:x1 |
| 12.1 | Off balance sheet exposures/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.2 | Off balance sheet exposures/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.3 | Off balance sheet exposures/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.4 | Off balance sheet exposures/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.5 | Off balance sheet exposures/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.6 | Off balance sheet exposures/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.7 | Off balance sheet exposures/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.8 | Off balance sheet exposures/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.9 | Off balance sheet exposures/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.10 | Off balance sheet exposures/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.11 | Off balance sheet exposures/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.12 | Off balance sheet exposures/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.13 | Off balance sheet exposures/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| 12.14 | Off balance sheet exposures/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x970 | N/A | boi_RT:x1 |
| r14.1 | C. Breakdown of exposures by risk weights/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.2 | C. Breakdown of exposures by risk weights/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.3 | C. Breakdown of exposures by risk weights/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.4 | C. Breakdown of exposures by risk weights/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.5 | C. Breakdown of exposures by risk weights/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.6 | C. Breakdown of exposures by risk weights/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.7 | C. Breakdown of exposures by risk weights/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.8 | C. Breakdown of exposures by risk weights/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.9 | C. Breakdown of exposures by risk weights/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.10 | C. Breakdown of exposures by risk weights/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.11 | C. Breakdown of exposures by risk weights/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.12 | C. Breakdown of exposures by risk weights/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.13 | C. Breakdown of exposures by risk weights/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| r14.14 | C. Breakdown of exposures by risk weights/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | N/A | boi_RT:x1 |
| 13.1 | 0%/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.2 | 0%/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.3 | 0%/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.4 | 0%/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.5 | 0%/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.6 | 0%/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.7 | 0%/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.8 | 0%/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.9 | 0%/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.10 | 0%/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.11 | 0%/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.12 | 0%/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.13 | 0%/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 13.14 | 0%/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x5 | boi_RT:x1 |
| 14.1 | 20%/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.2 | 20%/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.3 | 20%/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.4 | 20%/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.5 | 20%/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.6 | 20%/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.7 | 20%/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.8 | 20%/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.9 | 20%/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.10 | 20%/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.11 | 20%/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.12 | 20%/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.13 | 20%/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 14.14 | 20%/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x7 | boi_RT:x1 |
| 15.1 | 100%/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.2 | 100%/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.3 | 100%/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.4 | 100%/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.5 | 100%/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.6 | 100%/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.7 | 100%/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.8 | 100%/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.9 | 100%/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.10 | 100%/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.11 | 100%/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.12 | 100%/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.13 | 100%/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 15.14 | 100%/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x11 | boi_RT:x1 |
| 16.1 | 150%/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.2 | 150%/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.3 | 150%/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.4 | 150%/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.5 | 150%/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.6 | 150%/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.7 | 150%/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.8 | 150%/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.9 | 150%/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.10 | 150%/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.11 | 150%/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.12 | 150%/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.13 | 150%/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 16.14 | 150%/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x12 | boi_RT:x1 |
| 17.1 | 250%/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.2 | 250%/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.3 | 250%/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.4 | 250%/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.5 | 250%/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.6 | 250%/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.7 | 250%/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.8 | 250%/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.9 | 250%/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.10 | 250%/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.11 | 250%/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.12 | 250%/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.13 | 250%/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 17.14 | 250%/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x54 | boi_RT:x1 |
| 18.1 | 1250%/Exposure before credit loss provisions (before conversion into credit | boi_met:mi17 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.2 | 1250%/Exposure after credit loss provisions (before conversion into credit) | boi_met:mi18 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.3 | 1250%/Guarantees | boi_met:mi19 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.4 | 1250%/Credit derivatives | boi_met:mi20 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.5 | 1250%/Collateral - simple approach | boi_met:mi21 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.6 | 1250%/Sums subtracted (-) | boi_met:mi22 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.7 | 1250%/Sums added (+) | boi_met:mi23 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.8 | 1250%/Net exposure after effects of CRM substitution and before conversion coefficients | boi_met:mi24 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.9 | 1250%/Adjustment for exposure volatility (He) | boi_met:mi25 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.10 | 1250%/Adjusted value of financial security(-) | boi_met:mi26 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.11 | 1250%/Volatility and maturity adjustment(-) | boi_met:mi27 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.12 | 1250%/Size of exposure after credit mitigation (before conversion into credit) | boi_met:mi28 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.13 | 1250%/Size of exposure after conversion into credit | boi_met:mi29 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |
| 18.14 | 1250%/Risk-Weighted Assets (RWA) | boi_met:mi30 | xbrli:monetaryItemType | instant | boi_BC:x16 | boi_CS:x2 | boi_EC:x11 | boi_MC:x251 | boi_PI:x57 | boi_RT:x1 |