| r0.2 | label_boi_a2/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | N/A |
| r0.3 | label_boi_a2/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | N/A |
| 3.2 | Number of accounts: Individuals/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | boi_SE:x147 |
| 3.3 | Number of accounts: Individuals/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | boi_SE:x147 |
| 4.2 | Number of accounts: Corporations/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | boi_SE:x346 |
| 4.3 | Number of accounts: Corporations/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | boi_SE:x346 |
| 5.2 | Number of accounts: Other (neither individual nor corporation)/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | boi_SE:x347 |
| 5.3 | Number of accounts: Other (neither individual nor corporation)/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | boi_SE:x347 |
| 6.2 | Number of accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | N/A |
| 6.3 | Number of accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | N/A |
| r5.2 | Of which:/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | N/A |
| r5.3 | Of which:/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | N/A | boi_RT:x24 | N/A |
| 7.2 | Accounts blocked for reasons of AML/CFT/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x62 | boi_RT:x24 | N/A |
| 7.3 | Accounts blocked for reasons of AML/CFT/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x62 | boi_RT:x24 | N/A |
| 8.2 | Accounts of corporations that incorporated in an offshore country/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x63 | boi_RT:x24 | N/A |
| 8.3 | Accounts of corporations that incorporated in an offshore country/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x63 | boi_RT:x24 | N/A |
| 9.2 | Hold-mail accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x64 | boi_RT:x24 | N/A |
| 9.3 | Hold-mail accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x64 | boi_RT:x24 | N/A |
| 10.2 | Third-party accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x65 | boi_RT:x24 | N/A |
| 10.3 | Third-party accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x65 | boi_RT:x24 | N/A |
| 11.2 | Back to back accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x66 | boi_RT:x24 | N/A |
| 11.3 | Back to back accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x66 | boi_RT:x24 | N/A |
| 12.2 | Precious stones dealer accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x67 | boi_RT:x24 | N/A |
| 12.3 | Precious stones dealer accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x67 | boi_RT:x24 | N/A |
| 13.2 | Finance services provider accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x68 | boi_RT:x24 | N/A |
| 13.3 | Finance services provider accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x68 | boi_RT:x24 | N/A |
| 14.2 | Foreign politically exposed persons' accounts, including senior officer in an international institution/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x69 | boi_RT:x24 | N/A |
| 14.3 | Foreign politically exposed persons' accounts, including senior officer in an international institution/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x69 | boi_RT:x24 | N/A |
| 15.2 | Domestic politically exposed persons accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x70 | boi_RT:x24 | N/A |
| 15.3 | Domestic politically exposed persons accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x70 | boi_RT:x24 | N/A |
| 16.2 | Nonprofit organizations' accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x71 | boi_RT:x24 | N/A |
| 16.3 | Nonprofit organizations' accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x71 | boi_RT:x24 | N/A |
| 17.2 | Security manufacturing and services accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x72 | boi_RT:x24 | N/A |
| 17.3 | Security manufacturing and services accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x72 | boi_RT:x24 | N/A |
| 18.2 | Precious metals dealers' accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x73 | boi_RT:x24 | N/A |
| 18.3 | Precious metals dealers' accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x73 | boi_RT:x24 | N/A |
| 19.2 | Private banking accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x74 | boi_RT:x24 | N/A |
| 19.3 | Private banking accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x74 | boi_RT:x24 | N/A |
| 20.2 | Safe-owners' accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x75 | boi_RT:x24 | N/A |
| 20.3 | Safe-owners' accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x75 | boi_RT:x24 | N/A |
| 21.2 | Online accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x76 | boi_RT:x24 | N/A |
| 21.3 | Online accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x76 | boi_RT:x24 | N/A |
| 22.2 | Accounts with intensive cash activity/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x77 | boi_RT:x24 | N/A |
| 22.3 | Accounts with intensive cash activity/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x77 | boi_RT:x24 | N/A |
| 23.2 | Accounts with intensive cross-border wire transfers/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x78 | boi_RT:x24 | N/A |
| 23.3 | Accounts with intensive cross-border wire transfers/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x78 | boi_RT:x24 | N/A |
| 24.2 | Accounts with intensive cross-border wire transfers - to/from offshore countries/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x79 | boi_RT:x24 | N/A |
| 24.3 | Accounts with intensive cross-border wire transfers - to/from offshore countries/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x79 | boi_RT:x24 | N/A |
| 25.2 | Accounts with intensive cross-border wire transfers - to/from countries at high risk/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x80 | boi_RT:x24 | N/A |
| 25.3 | Accounts with intensive cross-border wire transfers - to/from countries at high risk/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x80 | boi_RT:x24 | N/A |
| 26.2 | Virtual-asset service providers's accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x81 | boi_RT:x24 | N/A |
| 26.3 | Virtual-asset service providers's accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x81 | boi_RT:x24 | N/A |
| 27.2 | Correspondent accounts/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x82 | boi_RT:x24 | N/A |
| 27.3 | Correspondent accounts/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x82 | boi_RT:x24 | N/A |
| 28.2 | Accounts with complex incorporation structures/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x83 | boi_RT:x24 | N/A |
| 28.3 | Accounts with complex incorporation structures/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x83 | boi_RT:x24 | N/A |
| 29.2 | Accounts with existing and developing significant focal points of risk/Total number of accounts of customers at high risk with regard to compliance | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x84 | boi_RT:x24 | N/A |
| 29.3 | Accounts with existing and developing significant focal points of risk/Ratio of accounts of customers at high risk with regard to compliance | boi_met:pi1312 | num:percentItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_RT:x84 | boi_RT:x24 | N/A |