| Fact Group (Combination of Network and Hypercube) | |
| Network: | 154107 - Statement - Statement of Changes in Equity, Stockholders' Equity Attributable to Noncontrolling Interest (http://www.abc.com/role/StatementOfChangesInEquityStockholdersEquityAttributableToNoncontrollingInterest) |
| Hypercube: | Changes in Stockholders' Equity Attributable to Noncontrolling Interest [Table] (abc:ChangesInStockholdersEquityAttributableToNoncontrollingInterestTable) |
| brm:ConceptMeasure | brm:ReportingEntityMeasure | brm:CalendarTimeMeasure | us-gaap:CreationDateAxis | dei:LegalEntityAxis | FactValue | brm:Units | brm:Rounding |
| abc:StockholdersEquityAttributableToNoncontrollingInterestPeriodIncreaseDecrease | 0000000001 (http://www.sec.gov/CIK) | 2009-01-01/2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 1000000 | iso4217:USD | -3 |
| abc:StockholdersEquityAttributableToNoncontrollingInterestPeriodIncreaseDecrease | 0000000001 (http://www.sec.gov/CIK) | 2010-01-01/2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 1000000 | iso4217:USD | -3 |
| us-gaap:MinorityInterest | 0000000001 (http://www.sec.gov/CIK) | 2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 4000000 | iso4217:USD | -3 |
| us-gaap:MinorityInterest | 0000000001 (http://www.sec.gov/CIK) | 2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 3000000 | iso4217:USD | -3 |
| us-gaap:MinorityInterest | 0000000001 (http://www.sec.gov/CIK) | 2008-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | 2000000 | iso4217:USD | -3 |
| us-gaap:NetIncomeLossAttributableToNoncontrollingInterest | 0000000001 (http://www.sec.gov/CIK) | 2010-01-01/2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | -1000000 | iso4217:USD | -3 |
| us-gaap:NetIncomeLossAttributableToNoncontrollingInterest | 0000000001 (http://www.sec.gov/CIK) | 2009-01-01/2009-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | -1000000 | iso4217:USD | -3 |