| Fact Group (Combination of Network and Hypercube) | |
| Network: | 306020 - Disclosure - Note G. Part 1. Commitments (http://www.abc.com/role/Commitments) |
| Hypercube: | Commitments [Table] (abc:CommitmentsTable) |
| brm:ConceptMeasure | brm:ReportingEntityMeasure | brm:CalendarTimeMeasure | us-gaap:CreationDateAxis | dei:LegalEntityAxis | FactValue | brm:Units | brm:Rounding |
| us-gaap:CommitmentsDisclosureTextBlock | 0000000001 (http://www.sec.gov/CIK) | 2010-01-01/2010-12-31 | abc:AsReportedFebruary122011Member | dei:EntityDomain | Sed elementum feugiat augue. Nam non tortor non leo porta bibendum. Morbi eu pede. Nulla sit amet nibh. Proin elit sem, ornare non, ullamcorper vel, sollicitudin a, lacus. Mauris tincidunt cursus est. |