| Fact Group (Combination of Network and Hypercube) | |
| Network: | 105102 - Statement - Statement of Operations, Earnings Per Share (http://www.abc.com/role/StatementOfOperationsEarningsPerShare) |
| Hypercube: | Earnings Per Share [Table] (abc:EarningsPerShareTable) |
| Slicers (applies to each fact value in each table cell) | |
| brm:ReportingEntityMeasure | 0000000001 (http://www.sec.gov/CIK) |
| us-gaap:CreationDateAxis | abc:AsReportedFebruary122011Member |
| dei:LegalEntityAxis | dei:EntityDomain |
| brm:Units | iso4217:USD xbrli:shares |
| brm:CalendarTimeMeasure | ||
| brm:ConceptMeasure | 2009-01-01/2009-12-31 | 2010-01-01/2010-12-31 |
| Earnings Per Share [Line Items] | ||
| EARNINGS PER SHARE [Hierarchy] | ||
| Earnings Per Share, Basic | 1.0 | 1.0 |