| r0.1 | label_boi_a2/Website | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| r0.2 | label_boi_a2/Application | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| r0.3 | label_boi_a2/Interactive voice response (IVR) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| r0.4 | label_boi_a2/Customer service (call center) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| r0.5 | label_boi_a2/SMS | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| r0.6 | label_boi_a2/Total | | | | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| r1.1 | Balance at end of reported half-year/Website | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| r1.2 | Balance at end of reported half-year/Application | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| r1.3 | Balance at end of reported half-year/Interactive voice response (IVR) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| r1.4 | Balance at end of reported half-year/Customer service (call center) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| r1.5 | Balance at end of reported half-year/SMS | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| r1.6 | Balance at end of reported half-year/Total | | | | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 1.1 | Number of customers who subscribe to e-banking channels/Website | boi_met:id89 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 1.2 | Number of customers who subscribe to e-banking channels/Application | boi_met:id89 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 1.3 | Number of customers who subscribe to e-banking channels/Interactive voice response (IVR) | boi_met:id89 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 1.4 | Number of customers who subscribe to e-banking channels/Customer service (call center) | boi_met:id89 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 1.5 | Number of customers who subscribe to e-banking channels/SMS | boi_met:id89 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 1.6 | Number of customers who subscribe to e-banking channels/Total | boi_met:id89 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 2.1 | Number of active payment cards/Website | boi_met:ri134 | xbrli:decimalItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 2.2 | Number of active payment cards/Application | boi_met:ri134 | xbrli:decimalItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 2.3 | Number of active payment cards/Interactive voice response (IVR) | boi_met:ri134 | xbrli:decimalItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 2.4 | Number of active payment cards/Customer service (call center) | boi_met:ri134 | xbrli:decimalItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 2.5 | Number of active payment cards/SMS | boi_met:ri134 | xbrli:decimalItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 2.6 | Number of active payment cards/Total | boi_met:ri134 | xbrli:decimalItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 3.1 | of which: cards issued online/Website | boi_met:ii1393 | xbrli:integerItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 3.2 | of which: cards issued online/Application | boi_met:ii1393 | xbrli:integerItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 3.3 | of which: cards issued online/Interactive voice response (IVR) | boi_met:ii1393 | xbrli:integerItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 3.4 | of which: cards issued online/Customer service (call center) | boi_met:ii1393 | xbrli:integerItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 3.5 | of which: cards issued online/SMS | boi_met:ii1393 | xbrli:integerItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 3.6 | of which: cards issued online/Total | boi_met:ii1393 | xbrli:integerItemType | instant | boi_CC:x23 | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| r5.1 | Activity during the course of the reported half-year/Website | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| r5.2 | Activity during the course of the reported half-year/Application | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| r5.3 | Activity during the course of the reported half-year/Interactive voice response (IVR) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| r5.4 | Activity during the course of the reported half-year/Customer service (call center) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| r5.5 | Activity during the course of the reported half-year/SMS | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| r5.6 | Activity during the course of the reported half-year/Total | | | | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 4.1 | Number of payment cards issued to customers/Website | boi_met:ri162 | xbrli:decimalItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 4.2 | Number of payment cards issued to customers/Application | boi_met:ri162 | xbrli:decimalItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 4.3 | Number of payment cards issued to customers/Interactive voice response (IVR) | boi_met:ri162 | xbrli:decimalItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 4.4 | Number of payment cards issued to customers/Customer service (call center) | boi_met:ri162 | xbrli:decimalItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 4.5 | Number of payment cards issued to customers/SMS | boi_met:ri162 | xbrli:decimalItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 4.6 | Number of payment cards issued to customers/Total | boi_met:ri162 | xbrli:decimalItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 5.1 | Number of customers who carried out an identified entry/Website | boi_met:ii1401 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 5.2 | Number of customers who carried out an identified entry/Application | boi_met:ii1401 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 5.3 | Number of customers who carried out an identified entry/Interactive voice response (IVR) | boi_met:ii1401 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 5.4 | Number of customers who carried out an identified entry/Customer service (call center) | boi_met:ii1401 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 5.5 | Number of customers who carried out an identified entry/SMS | boi_met:ii1401 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 5.6 | Number of customers who carried out an identified entry/Total | boi_met:ii1401 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 6.1 | Number of customers who carried out activities/Website | boi_met:ii1400 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 6.2 | Number of customers who carried out activities/Application | boi_met:ii1400 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 6.3 | Number of customers who carried out activities/Interactive voice response (IVR) | boi_met:ii1400 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 6.4 | Number of customers who carried out activities/Customer service (call center) | boi_met:ii1400 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 6.5 | Number of customers who carried out activities/SMS | boi_met:ii1400 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 6.6 | Number of customers who carried out activities/Total | boi_met:ii1400 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| r9.1 | Activities during the course of the reported half-year/Website | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| r9.2 | Activities during the course of the reported half-year/Application | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| r9.3 | Activities during the course of the reported half-year/Interactive voice response (IVR) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| r9.4 | Activities during the course of the reported half-year/Customer service (call center) | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| r9.5 | Activities during the course of the reported half-year/SMS | | | | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| r9.6 | Activities during the course of the reported half-year/Total | | | | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 7.1 | Number of activities/Website | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | N/A | boi_SE:x73 |
| 7.2 | Number of activities/Application | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | N/A | boi_SE:x73 |
| 7.3 | Number of activities/Interactive voice response (IVR) | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | N/A | boi_SE:x73 |
| 7.4 | Number of activities/Customer service (call center) | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | N/A | boi_SE:x73 |
| 7.5 | Number of activities/SMS | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | N/A | boi_SE:x73 |
| 7.6 | Number of activities/Total | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | N/A | boi_SE:x73 |
| 8.1 | of which: submission of a request to receive credit/Website | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_MC:x1168 | boi_SE:x73 |
| 8.2 | of which: submission of a request to receive credit/Application | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_MC:x1168 | boi_SE:x73 |
| 8.3 | of which: submission of a request to receive credit/Interactive voice response (IVR) | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | boi_MC:x1168 | boi_SE:x73 |
| 8.4 | of which: submission of a request to receive credit/Customer service (call center) | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | boi_MC:x1168 | boi_SE:x73 |
| 8.5 | of which: submission of a request to receive credit/SMS | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | boi_MC:x1168 | boi_SE:x73 |
| 8.6 | of which: submission of a request to receive credit/Total | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_MC:x1168 | boi_SE:x73 |
| 9.1 | of which : payment card activation, recover/change PIN/Website | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_MC:x1172 | boi_SE:x73 |
| 9.2 | of which : payment card activation, recover/change PIN/Application | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_MC:x1172 | boi_SE:x73 |
| 9.3 | of which : payment card activation, recover/change PIN/Interactive voice response (IVR) | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1159 | boi_MC:x1172 | boi_SE:x73 |
| 9.4 | of which : payment card activation, recover/change PIN/Customer service (call center) | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1160 | boi_MC:x1172 | boi_SE:x73 |
| 9.5 | of which : payment card activation, recover/change PIN/SMS | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | boi_MC:x1161 | boi_MC:x1172 | boi_SE:x73 |
| 9.6 | of which : payment card activation, recover/change PIN/Total | boi_met:ii681 | xbrli:integerItemType | instant | N/A | boi_CS:x1 | boi_GA:x1 | N/A | boi_MC:x1172 | boi_SE:x73 |