| Fact Group (Combination of Network and Hypercube) | |
| Network: | 153102 - Statement - Prior Period Adjustment, Stockholders' Equity Attributable to Parent (http://www.abc.com/role/PriorPeriodAdjustmentStockholderEquityAttributableToParent) |
| Hypercube: | Prior Period Adjustment, Stockholders' Equity Attributable to Parent [Table] (abc:PriorPeriodAdjustmentStockholdersEquityAttributableToParentTable) |
| brm:ConceptMeasure | brm:ReportingEntityMeasure | brm:CalendarTimeMeasure | us-gaap:CreationDateAxis | dei:LegalEntityAxis | FactValue | brm:Units | brm:Rounding |
| abc:StockholdersEquityAttributableToParentAdjustments | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 0 | iso4217:USD | -3 |
| abc:EffectOfMandatoryChangeInAccountingPolicyForAdoptionOfFasXxx | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | -1000000 | iso4217:USD | -3 |
| abc:EffectOfVoluantaryChangeInAccountingPolicy | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | -1000000 | iso4217:USD | -3 |
| abc:CorrectionOfPriorPeriodError | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 2000000 | iso4217:USD | -3 |
| us-gaap:StockholdersEquity | 0000000001 (http://www.sec.gov/CIK) | 2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 36000000 | iso4217:USD | -3 |
| us-gaap:StockholdersEquity | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 36000000 | iso4217:USD | -3 |
| us-gaap:StockholdersEquity | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary82010Member | dei:EntityDomain | 36000000 | iso4217:USD | -3 |
| us-gaap:StockholdersEquity | 0000000001 (http://www.sec.gov/CIK) | 2008-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 36000000 | iso4217:USD | -3 |