| Fact Group (Combination of Network and Hypercube) | |
| Network: | 104102 - Statement - Classes of Common Stock (http://www.abc.com/role/ClassesOfCommonStock) |
| Hypercube: | Common Stock, by Class [Table] (abc:CommonStockByClassTable) |
| 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 |
| abc:ClassOfCommonStockAxis | |||
| brm:ConceptMeasure | Class of Common Stock, All Classes [Domain] | Common Class A [Member] | Common Class B [Member] |
| Common Stock, by Class [Line Items] | |||
| Common Stock, by Class [Hierarchy] | |||
| Common Stock, Value, Issued | 20,000,000 | 10,000,000 | 10,000,000 |
| Common Stock, Par or Stated Value Per Share | 1.0 | 1.0 | |
| Common Stock, Shares Authorized | 60,000 | 50,000 | |
| Common Stock, Shares, Issued | 50,000 | 40,000 | |
| Common Stock, Shares, Outstanding | 90,000 | 50,000 | 40,000 |
| Common Stock, Value, Outstanding | 10,000,000 | 10,000,000 | |