| Fact Group (Combination of Network and Hypercube) | |
| Network: | 104104 - Statement - Statement of Financial Position, Other Parenthetical (http://www.abc.com/role/OtherParenthetical) |
| Hypercube: | Statement of Financial Condition, Classified, Parenthetical, Other [Table] (abc:StatementOfFinancialConditionClassifiedParentheticalOtherTable) |
| brm:ConceptMeasure | brm:ReportingEntityMeasure | brm:CalendarTimeMeasure | us-gaap:CreationDateAxis | dei:LegalEntityAxis | FactValue | brm:Units | brm:Rounding |
| us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent | 0000000001 (http://www.sec.gov/CIK) | 2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 1000000 | iso4217:USD | -3 |
| us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 1000000 | iso4217:USD | -3 |
| us-gaap:RetainedEarningsDeficitEliminated | 0000000001 (http://www.sec.gov/CIK) | 2010-01-01/2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | Sollicitudin lacus cursus est ullamcorper vel sollicitudin lacus est ullamcorper vel sollicitudin lacus |