Derivative Financial Instruments and Hedging Activities (Details 2) (USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010
Interest rate contracts \| Designated as hedging instruments \| Other Current Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities	$ 2.1	$ 15.6
Interest rate contracts \| Designated as hedging instruments \| Other Long-term Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities		2.8
Not designated as hedging instruments \| Foreign exchange contracts \| Other Current Assets
Fair values of open derivative instruments
Fair value of derivative assets	0.8	0.3
Not designated as hedging instruments \| Foreign exchange contracts \| Other Current Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities	0.2	0.8
Other Current Assets
Fair values of open derivative instruments
Fair value of derivative assets	0.8	0.3
Other Current Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities	2.3	16.4
Other Long-term Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities		$ 2.8

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

-Subparagraph a

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant