| r0.1 | label_boi_a2/E-banking channels | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| r0.2 | label_boi_a2/Website | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| r0.3 | label_boi_a2/Application | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| r0.4 | label_boi_a2/Self-service stands (ATMs) | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| r0.5 | label_boi_a2/Teller at branch | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| r0.6 | label_boi_a2/Total | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| r1.1 | Balance at end of half-year/E-banking channels | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| r1.2 | Balance at end of half-year/Website | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| r1.3 | Balance at end of half-year/Application | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| r1.4 | Balance at end of half-year/Self-service stands (ATMs) | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| r1.5 | Balance at end of half-year/Teller at branch | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| r1.6 | Balance at end of half-year/Total | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| 1.1 | Accounts of subscribers to e-banking channels/E-banking channels | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| 1.2 | Accounts of subscribers to e-banking channels/Website | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| 1.3 | Accounts of subscribers to e-banking channels/Application | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| 1.4 | Accounts of subscribers to e-banking channels/Self-service stands (ATMs) | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| 1.5 | Accounts of subscribers to e-banking channels/Teller at branch | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| 1.6 | Accounts of subscribers to e-banking channels/Total | boi_met:ii289 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| 2.1 | of which: online accounts/E-banking channels | boi_met:ii689 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| 2.2 | of which: online accounts/Website | boi_met:ii689 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| 2.3 | of which: online accounts/Application | boi_met:ii689 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| 2.4 | of which: online accounts/Self-service stands (ATMs) | boi_met:ii689 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| 2.5 | of which: online accounts/Teller at branch | boi_met:ii689 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| 2.6 | of which: online accounts/Total | boi_met:ii689 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| r4.1 | Activities during the half-year reported/E-banking channels | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| r4.2 | Activities during the half-year reported/Website | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| r4.3 | Activities during the half-year reported/Application | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| r4.4 | Activities during the half-year reported/Self-service stands (ATMs) | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| r4.5 | Activities during the half-year reported/Teller at branch | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| r4.6 | Activities during the half-year reported/Total | | | | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| 3.1 | Current accounts and SROs opened during the half-year reported/E-banking channels | boi_met:ii682 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| 3.2 | Current accounts and SROs opened during the half-year reported/Website | boi_met:ii682 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| 3.3 | Current accounts and SROs opened during the half-year reported/Application | boi_met:ii682 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| 3.4 | Current accounts and SROs opened during the half-year reported/Self-service stands (ATMs) | boi_met:ii682 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| 3.5 | Current accounts and SROs opened during the half-year reported/Teller at branch | boi_met:ii682 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| 3.6 | Current accounts and SROs opened during the half-year reported/Total | boi_met:ii682 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| 4.1 | Current accounts and SROs opened during the half-year reported/E-banking channels | boi_met:ii1390 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| 4.2 | Current accounts and SROs opened during the half-year reported/Website | boi_met:ii1390 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| 4.3 | Current accounts and SROs opened during the half-year reported/Application | boi_met:ii1390 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| 4.4 | Current accounts and SROs opened during the half-year reported/Self-service stands (ATMs) | boi_met:ii1390 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| 4.5 | Current accounts and SROs opened during the half-year reported/Teller at branch | boi_met:ii1390 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| 4.6 | Current accounts and SROs opened during the half-year reported/Total | boi_met:ii1390 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |
| 5.1 | of which: accounts in which there was activity/E-banking channels | boi_met:ii1391 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1155 | boi_SE:x313 |
| 5.2 | of which: accounts in which there was activity/Website | boi_met:ii1391 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1156 | boi_SE:x313 |
| 5.3 | of which: accounts in which there was activity/Application | boi_met:ii1391 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1157 | boi_SE:x313 |
| 5.4 | of which: accounts in which there was activity/Self-service stands (ATMs) | boi_met:ii1391 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x1158 | boi_SE:x313 |
| 5.5 | of which: accounts in which there was activity/Teller at branch | boi_met:ii1391 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x807 | boi_SE:x313 |
| 5.6 | of which: accounts in which there was activity/Total | boi_met:ii1391 | xbrli:integerItemType | instant | boi_CS:x1 | boi_GA:x1 | boi_MC:x806 | boi_SE:x313 |