Derivative Instruments and Fair Value Measurements (Details 1) (USD $) In Millions	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax [Abstract]
Pre-tax gains (losses) recorded in other comprehensive income related to forward exchange contracts (cash flow hedges)	$ 3.0	$ 9.0	$ 12.0
Pre-tax gains (losses) recorded in other comprehensive income related to foreign currency denominated debt (net investment hedges)	(0.2)
Pre-tax gains (losses) recorded in other comprehensive income related to hedges, total	2.8	9.0	12.0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Pre-tax gains (losses) reclassified from accumulated other comprehensive income into the Condensed Consolidated Statement of Operations related to forward exchange contracts designated as cash flow hedges	(3.2)	(4.4)	4.1
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Pre-tax gains (losses) recognized in the Condensed Consolidated Statement of Operations related to forward exchange contracts not designated as hedging instruments	6.6	(16.2)	11.6
Sales [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Pre-tax gains (losses) reclassified from accumulated other comprehensive income into the Condensed Consolidated Statement of Operations related to forward exchange contracts designated as cash flow hedges	0.3	(2.2)	7.2
Cost of sales [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Pre-tax gains (losses) reclassified from accumulated other comprehensive income into the Condensed Consolidated Statement of Operations related to forward exchange contracts designated as cash flow hedges	(3.5)	(2.2)	(3.1)
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Pre-tax gains (losses) recognized in the Condensed Consolidated Statement of Operations related to forward exchange contracts not designated as hedging instruments	0.4	(0.4)	(0.1)
Other (expense) income [Member]
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]
Pre-tax gains (losses) recognized in the Condensed Consolidated Statement of Operations related to forward exchange contracts not designated as hedging instruments	$ 6.2	$ (15.8)	$ 11.7

Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 55

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6920433&loc=d3e998-108581

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 46

-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 130

-Paragraph 24

-Subparagraph b

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

-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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 31, 46

-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 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 14, 17, 20, 26

-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 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 14, 17, 20, 24, 26

-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.

+ Details