| r0.1 | label_boi_a2/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | N/A | boi_RT:x24 | N/A |
| r0.3 | label_boi_a2/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | N/A |
| r0.4 | label_boi_a2/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | N/A |
| 3.1 | Individuals accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | N/A | boi_RT:x24 | boi_SE:x147 |
| 3.3 | Individuals accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | boi_SE:x147 |
| 3.4 | Individuals accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | boi_SE:x147 |
| 4.1 | Corporations accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | N/A | boi_RT:x24 | boi_SE:x346 |
| 4.3 | Corporations accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | boi_SE:x346 |
| 4.4 | Corporations accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | boi_SE:x346 |
| 5.1 | Other accounts (neither individual nor corporation)/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | N/A | boi_RT:x24 | boi_SE:x347 |
| 5.3 | Other accounts (neither individual nor corporation)/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | boi_SE:x347 |
| 5.4 | Other accounts (neither individual nor corporation)/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | boi_SE:x347 |
| 6.1 | Total number of accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | N/A | boi_RT:x24 | N/A |
| 6.3 | Total number of accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | N/A |
| 6.4 | Total number of accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | N/A |
| r5.1 | Of which:/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | N/A | boi_RT:x24 | N/A |
| r5.3 | Of which:/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | N/A |
| r5.4 | Of which:/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_RT:x24 | N/A |
| 7.1 | Accounts blocked for reasons of AML/CFT/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x62 | boi_RT:x24 | N/A |
| 7.3 | Accounts blocked for reasons of AML/CFT/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x62 | boi_RT:x24 | N/A |
| 7.4 | Accounts blocked for reasons of AML/CFT/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x62 | boi_RT:x24 | N/A |
| 8.1 | Accounts of corporations that incorporated in offshore country/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x63 | boi_RT:x24 | N/A |
| 8.3 | Accounts of corporations that incorporated in offshore country/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x63 | boi_RT:x24 | N/A |
| 8.4 | Accounts of corporations that incorporated in offshore country/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x63 | boi_RT:x24 | N/A |
| 9.1 | Hold-mail accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x64 | boi_RT:x24 | N/A |
| 9.3 | Hold-mail accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x64 | boi_RT:x24 | N/A |
| 9.4 | Hold-mail accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x64 | boi_RT:x24 | N/A |
| 10.1 | Third-party accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x65 | boi_RT:x24 | N/A |
| 10.3 | Third-party accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x65 | boi_RT:x24 | N/A |
| 10.4 | Third-party accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x65 | boi_RT:x24 | N/A |
| 11.1 | Back to back accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x66 | boi_RT:x24 | N/A |
| 11.3 | Back to back accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x66 | boi_RT:x24 | N/A |
| 11.4 | Back to back accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x66 | boi_RT:x24 | N/A |
| 12.1 | Precious stones dealer accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x67 | boi_RT:x24 | N/A |
| 12.3 | Precious stones dealer accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x67 | boi_RT:x24 | N/A |
| 12.4 | Precious stones dealer accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x67 | boi_RT:x24 | N/A |
| 13.1 | Finance services provider accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x68 | boi_RT:x24 | N/A |
| 13.3 | Finance services provider accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x68 | boi_RT:x24 | N/A |
| 13.4 | Finance services provider accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x68 | boi_RT:x24 | N/A |
| 14.1 | Foreign politically exposed persons' accounts, including senior officer in an international institution/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x69 | boi_RT:x24 | N/A |
| 14.3 | Foreign politically exposed persons' accounts, including senior officer in an international institution/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x69 | boi_RT:x24 | N/A |
| 14.4 | Foreign politically exposed persons' accounts, including senior officer in an international institution/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x69 | boi_RT:x24 | N/A |
| 15.1 | Domestic politically exposed persons accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x70 | boi_RT:x24 | N/A |
| 15.3 | Domestic politically exposed persons accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x70 | boi_RT:x24 | N/A |
| 15.4 | Domestic politically exposed persons accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x70 | boi_RT:x24 | N/A |
| 16.1 | Nonprofit organizations' accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x71 | boi_RT:x24 | N/A |
| 16.3 | Nonprofit organizations' accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x71 | boi_RT:x24 | N/A |
| 16.4 | Nonprofit organizations' accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x71 | boi_RT:x24 | N/A |
| 17.1 | Security manufacturing and services accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x72 | boi_RT:x24 | N/A |
| 17.3 | Security manufacturing and services accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x72 | boi_RT:x24 | N/A |
| 17.4 | Security manufacturing and services accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x72 | boi_RT:x24 | N/A |
| 18.1 | Precious metal dealers' accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x73 | boi_RT:x24 | N/A |
| 18.3 | Precious metal dealers' accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x73 | boi_RT:x24 | N/A |
| 18.4 | Precious metal dealers' accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x73 | boi_RT:x24 | N/A |
| 19.1 | Private banking accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x74 | boi_RT:x24 | N/A |
| 19.3 | Private banking accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x74 | boi_RT:x24 | N/A |
| 19.4 | Private banking accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x74 | boi_RT:x24 | N/A |
| 20.1 | Safe-owners' accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x75 | boi_RT:x24 | N/A |
| 20.3 | Safe-owners' accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x75 | boi_RT:x24 | N/A |
| 20.4 | Safe-owners' accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x75 | boi_RT:x24 | N/A |
| 21.1 | Online accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x76 | boi_RT:x24 | N/A |
| 21.3 | Online accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x76 | boi_RT:x24 | N/A |
| 21.4 | Online accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x76 | boi_RT:x24 | N/A |
| 22.1 | Accounts with intensive cash activity/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x77 | boi_RT:x24 | N/A |
| 22.3 | Accounts with intensive cash activity/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x77 | boi_RT:x24 | N/A |
| 22.4 | Accounts with intensive cash activity/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x77 | boi_RT:x24 | N/A |
| 23.1 | Accounts with intensive cross-border wire transfers/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x78 | boi_RT:x24 | N/A |
| 23.3 | Accounts with intensive cross-border wire transfers/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x78 | boi_RT:x24 | N/A |
| 23.4 | Accounts with intensive cross-border wire transfers/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x78 | boi_RT:x24 | N/A |
| 24.1 | Accounts with intensive cross-border wire transfers - to/from offshore countries/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x79 | boi_RT:x24 | N/A |
| 24.3 | Accounts with intensive cross-border wire transfers - to/from offshore countries/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x79 | boi_RT:x24 | N/A |
| 24.4 | Accounts with intensive cross-border wire transfers - to/from offshore countries/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x79 | boi_RT:x24 | N/A |
| 25.1 | Accounts with intensive cross-border wire transfers - to/from countries at high risk/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x80 | boi_RT:x24 | N/A |
| 25.3 | Accounts with intensive cross-border wire transfers - to/from countries at high risk/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x80 | boi_RT:x24 | N/A |
| 25.4 | Accounts with intensive cross-border wire transfers - to/from countries at high risk/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x80 | boi_RT:x24 | N/A |
| 26.1 | Virtual-asset service providers's accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x81 | boi_RT:x24 | N/A |
| 26.3 | Virtual-asset service providers's accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x81 | boi_RT:x24 | N/A |
| 26.4 | Virtual-asset service providers's accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x81 | boi_RT:x24 | N/A |
| 27.1 | Correspondent accounts/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x82 | boi_RT:x24 | N/A |
| 27.3 | Correspondent accounts/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x82 | boi_RT:x24 | N/A |
| 27.4 | Correspondent accounts/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x82 | boi_RT:x24 | N/A |
| 28.1 | Accounts with complex incorporation structures/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x83 | boi_RT:x24 | N/A |
| 28.3 | Accounts with complex incorporation structures/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x83 | boi_RT:x24 | N/A |
| 28.4 | Accounts with complex incorporation structures/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x83 | boi_RT:x24 | N/A |
| 29.1 | Accounts with existing and developing significant focal points of risk/The balance of the financial assets portfolio of customers at high risk with regard to compliance | boi_met:mi1 | xbrli:monetaryItemType | instant | boi_BC:x14 | boi_CS:x1 | boi_GA:x1 | boi_MC:x889 | boi_RT:x84 | boi_RT:x24 | N/A |
| 29.3 | Accounts with existing and developing significant focal points of risk/Of which: in accounts of customers at high risk with regard to compliance | boi_met:mi1313 | xbrli:monetaryItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x84 | boi_RT:x24 | N/A |
| 29.4 | Accounts with existing and developing significant focal points of risk/Ratio of credit turnover of activity in accounts of customers at high risk with regard to compliance | boi_met:pi1314 | num:percentItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x84 | boi_RT:x24 | N/A |