| Component: (Network and Table) | |
|---|---|
| Network | 189 - Disclosure - Income Tax Expense Attributable to Income from Continuing Operations (Detail) (http://www.abm.com/taxonomy/role/DisclosureIncomeTaxExpenseAttributableToIncomeFromContinuingOperations) |
| Table | Reconciliation of Statutory Federal Tax Rate [Table] |
| Reporting Entity [Axis] | 0000771497 (http://www.sec.gov/CIK) |
| Legal Entity [Axis] | Entity [Domain] |
| Reconciliation of Statutory Federal Tax Rate [Line Items] | Period [Axis] | ||
|---|---|---|---|
2011-11-01 - 2012-10-31 | 2010-11-01 - 2011-10-31 | 2009-11-01 - 2010-10-31 | |
Statutory rate | .350 | .350 | .350 |
State and local income taxes, net of federal tax benefit | .065 | .063 | .065 |
Federal and state tax credits | (.055) | (.051) | (.046) |
Impact of change in state tax rate | .012 | (.004) | (.001) |
Tax liabilities no longer required | (.072) | (.040) | (.005) |
Nondeductible expenses and other, net | .023 | .032 | .023 |
Effective Income Tax Rate, Continuing Operations, Total | .323 | .350 | .386 |