| r0.C401 | boemd_a8091.root/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| r0.C402 | boemd_a8091.root/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| r1.C401 | Region/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| r1.C402 | Region/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| r2.C401 | Direct insurance/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| r2.C402 | Direct insurance/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| CAT601.C401 | UK/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | s2c_GA:GB | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT601.C402 | UK/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | s2c_GA:GB | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT602.C401 | Europe ex UK/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b13 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT602.C402 | Europe ex UK/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b13 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT603.C401 | North East US/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b14 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT603.C402 | North East US/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b14 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT604.C401 | South East US/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b15 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT604.C402 | South East US/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b15 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT605.C401 | Mid West US/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b16 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT605.C402 | Mid West US/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b16 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT616.C401 | Western US/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b23 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT616.C402 | Western US/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b23 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT606.C401 | Caribbean/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b17 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT606.C402 | Caribbean/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b17 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT607.C401 | South America/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b18 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT607.C402 | South America/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b18 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT608.C401 | Australia/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | s2c_GA:AU | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT608.C402 | Australia/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | s2c_GA:AU | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT609.C401 | Rest of World/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b24 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT609.C402 | Rest of World/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b24 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT610.C401 | Unallocated/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b20 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| CAT610.C402 | Unallocated/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b20 | s2c_RT:x104 | s2c_LB:x28 | s2c_AM:x80 |
| r14.C401 | Reinsurance/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| r14.C402 | Reinsurance/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | N/A | N/A | N/A | N/A | N/A |
| CAT611.C401 | UK/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | s2c_GA:GB | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT611.C402 | UK/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | s2c_GA:GB | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT612.C401 | Europe ex UK/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b13 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT612.C402 | Europe ex UK/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b13 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT613.C401 | North America/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b22 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT613.C402 | North America/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b22 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT614.C401 | Rest of World/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b21 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT614.C402 | Rest of World/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b21 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT615.C401 | Unallocated/Gross Annual Written Premium | s2md_met:mi503 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b20 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |
| CAT615.C402 | Unallocated/Total Sum Insured | s2md_met:mi518 | xbrli:monetaryItemType | instant | boec_s2c_AP:b5 | s2c_RT:x1 | boec_s2c_GA:b20 | s2c_RT:x104 | s2c_LB:x109 | s2c_AM:x80 |