Legal Matters and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2011
Loss Contingencies [Line Items]
Litigation Settlement, Gross	$ 16.00

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

No definition available.

Name:	us-gaap_LitigationSettlementGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration