| Line | Label | Object Class | Period Type | Balance | Name |
| 1 | 306030 - Disclosure - Note G. Part 2. Contingencies | [Network] | http://www.abc.com/role/Contingencies | ||
| 2 | Loss Contingencies [Table] | [Table] | us-gaap:LossContingenciesTable | ||
| 3 | Report Date [Axis] | [Axis] | us-gaap:CreationDateAxis | ||
| 4 | Financial Statements Date [Domain] | [Domain] | us-gaap:DefaultFinancialStatementsDateMember | ||
| 5 | As Reported February 12, 2011 [Member] | [Member] | For Period | abc:AsReportedFebruary122011Member | |
| 6 | Legal Entity [Axis] | [Axis] | dei:LegalEntityAxis | ||
| 7 | Consolidated Entity [Domain] | [Domain] | dei:EntityDomain | ||
| 8 | Loss Contingencies by Nature of Contingency [Axis] | [Axis] | us-gaap:LossContingenciesByNatureOfContingencyAxis | ||
| 9 | Loss Contingency, Nature [Domain] | [Domain] | us-gaap:LossContingencyNatureDomain | ||
| 10 | Pending or Threatened Litigation [Member] | [Member] | us-gaap:PendingOrThreatenedLitigationMember | ||
| 11 | Damage from Fire, Explosion or Other Hazard [Member] | [Member] | us-gaap:DamageFromFireExplosionOrOtherHazardMember | ||
| 12 | Loss Contingencies [Line Items] | [Line Items] | us-gaap:LossContingenciesLineItems | ||
| 13 | Loss Contingencies [Hierarchy] | [Abstract] | abc:LossContingenciesHierarchy | ||
| 14 | Loss Contingency Disclosures | [Concept] Text Block (HTML) | For Period | us-gaap:LossContingencyDisclosures |