Employee Retirement Plans (Details 3) (USD $) In Millions	Sep. 30, 2011
Pension Benefit [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Fiscal 2012	$ 20.7
Fiscal 2013	21.7
Fiscal 2014	23.0
Fiscal 2015	24.3
Fiscal 2016	26.0
Fiscal 2017-2021	148.5
Other Postretirement Benefits [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Fiscal 2012	2.0
Fiscal 2013	2.0
Fiscal 2014	2.0
Fiscal 2015	2.0
Fiscal 2016	2.0
Fiscal 2017-2021	$ 9.9

The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant