| r0.C0010 | boe_a888.root/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | N/A | boe_eba_RP:x9024 | N/A |
| r0.C0020 | boe_a888.root/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | N/A | boe_eba_RP:x9024 | N/A |
| r0.C0030 | boe_a888.root/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | N/A | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| r0.C0040 | boe_a888.root/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | N/A | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| r0.C0050 | boe_a888.root/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | N/A | boe_eba_RP:x9024 | N/A |
| r0.C0060 | boe_a888.root/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | N/A | boe_eba_RP:x9024 | N/A |
| r0.C0070 | boe_a888.root/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | N/A | boe_eba_RP:x9024 | N/A |
| R0009.C0010 | Analysis by country/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | N/A | boe_eba_RP:x9024 | N/A |
| R0009.C0020 | Analysis by country/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | N/A | boe_eba_RP:x9024 | N/A |
| R0009.C0030 | Analysis by country/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | N/A | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0009.C0040 | Analysis by country/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | N/A | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0009.C0050 | Analysis by country/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | N/A | boe_eba_RP:x9024 | N/A |
| R0009.C0060 | Analysis by country/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | N/A | boe_eba_RP:x9024 | N/A |
| R0009.C0070 | Analysis by country/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | N/A | boe_eba_RP:x9024 | N/A |
| R0010.C0010 | Total of A+B+C/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0010.C0020 | Total of A+B+C/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0010.C0030 | Total of A+B+C/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0010.C0040 | Total of A+B+C/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0010.C0050 | Total of A+B+C/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0010.C0060 | Total of A+B+C/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0010.C0070 | Total of A+B+C/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0019.C0010 | A International Organisations/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0019.C0020 | A International Organisations/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0019.C0030 | A International Organisations/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0019.C0040 | A International Organisations/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0019.C0050 | A International Organisations/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0019.C0060 | A International Organisations/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0019.C0070 | A International Organisations/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | boe_eba_GA:x9001 | boe_eba_RP:x9024 | N/A |
| R0020.C0010 | EU Institutions/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | N/A |
| R0020.C0020 | EU Institutions/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | N/A |
| R0020.C0030 | EU Institutions/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0020.C0040 | EU Institutions/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0020.C0050 | EU Institutions/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | N/A |
| R0020.C0060 | EU Institutions/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | N/A |
| R0020.C0070 | EU Institutions/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | boe_eba_GA:x9006 | boe_eba_RP:x9024 | N/A |
| R0030.C0010 | Other Institutions/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | N/A |
| R0030.C0020 | Other Institutions/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | N/A |
| R0030.C0030 | Other Institutions/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0030.C0040 | Other Institutions/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0030.C0050 | Other Institutions/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | N/A |
| R0030.C0060 | Other Institutions/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | N/A |
| R0030.C0070 | Other Institutions/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | boe_eba_GA:x9013 | boe_eba_RP:x9024 | N/A |
| R0040.C0010 | B Unallocated by country/Dividends paid to a non-resident parent | eba_met:md103 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x3 | boe_eba_PL:x9055 | boe_eba_MC:x9335 | boe_eba_MC:x9152 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | N/A |
| R0040.C0020 | B Unallocated by country/Profits attributable to non-resident parents | boe_met:mi9210 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9555 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | N/A |
| R0040.C0030 | B Unallocated by country/Acquisitions of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9257 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0040.C0040 | B Unallocated by country/Disposals of equity in the UK entity by a non-resident parent | boe_met:md9063 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | boe_eba_MC:x9335 | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9258 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | boe_eba_MA:x9001 |
| R0040.C0050 | B Unallocated by country/Equity held by non-resident parents in the reporting institution | boe_met:mi9064 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x17 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9264 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | N/A |
| R0040.C0060 | B Unallocated by country/Loans from non-resident parent / debt issued to non-resident parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x7 | boe_eba_PL:x9055 | N/A | boe_eba_MC:x9395 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | N/A |
| R0040.C0070 | B Unallocated by country/Loans to non-resident parent / holdings of debt issued by parent | boe_met:mi8001 | xbrli:monetaryItemType | instant | boe_eba_GA:x9002 | N/A | eba_BA:x6 | boe_eba_PL:x9055 | N/A | eba_MC:x423 | boe_eba_GA:x9081 | boe_eba_RP:x9024 | N/A |