| r0.1 | label_boi_a2/Balance | | | | boi_CS:x2 | boi_RP:x24 |
| r1.1 | Credit exposure deriving from securitization structures sponsored by the banking corporation or related entities/Balance | | | | boi_CS:x2 | boi_RP:x24 |
| 1.1 | Maximum amount of credit exposure deriving from credit strengthening to securitization structures in the form of guarantees, deferred securities purchased notes,and other reinforcements/Balance | boi_met:mi522 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |
| 2.1 | Commitments to supply liquidity for unutilized securitization structures/Balance | boi_met:mi523 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |
| 3.1 | Other credit risk in respect of securitization structures/Balance | boi_met:mi524 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |
| r5.1 | Credit exposure deriving from securitization structures sponsored by others/Balance | | | | boi_CS:x2 | boi_RP:x24 |
| 4.1 | Maximum amount of credit exposure deriving from credit strengthening to securitization structures in the form of guarantees, deferred securities purchased notes,and other reinforcements/Balance | boi_met:mi525 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |
| 5.1 | Commitments to supply liquidity for unutilized securitization structures/Balance | boi_met:mi526 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |
| 6.1 | Other credit risk in respect of securitization structures/Balance | boi_met:mi527 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |
| 7.1 | Total credit exposure deriving from securitization structures/Balance | boi_met:mi528 | xbrli:monetaryItemType | instant | boi_CS:x2 | boi_RP:x24 |