Retirement And Other Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Retirement And Other Benefit Plans [Abstract]
Accrued benefit liability related to other postretirement benefit obligations	$ 0.8	$ 0.8

Disclosure under FAS 132R, before it was amended by FAS 158, of the accrued benefit liability, if any, as one of the amounts recognized in the balance sheet prior to the adoption of the recognition provisions of FAS 158.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph c(4)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_DefinedBenefitPlanBeforeAdoptionOfSFAS158RecognitionProvisionsAccruedBenefitLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant