Financial Instruments (Fair Value Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Derivative [Line Items]
Total Derivatives, Assets	$ 101.6	$ 118.2
Total Derivatives, Liabilities	56.5	43.8
Designated As Hedging Instruments [Member]
Derivative [Line Items]
Total Derivatives, Assets	100.3	115.2
Total Derivatives, Liabilities	55.2	40.0
Designated As Hedging Instruments [Member] | Other Receivables [Member] | Interest Rate Swap Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	11.8	5.8
Designated As Hedging Instruments [Member] | Other Receivables [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	11.7	22.0
Designated As Hedging Instruments [Member] | Other Noncurrent Assets [Member] | Interest Rate Swap Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	36.2	42.4
Designated As Hedging Instruments [Member] | Other Noncurrent Assets [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	40.6	45.0
Designated As Hedging Instruments [Member] | Accrued Liabilities [Member] | Interest Rate Swap Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	1.4	3.8
Designated As Hedging Instruments [Member] | Accrued Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	49.8	33.0
Designated As Hedging Instruments [Member] | Other Noncurrent Liabilities [Member] | Interest Rate Swap Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	2.9	2.2
Designated As Hedging Instruments [Member] | Other Noncurrent Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	1.1	1.0
Not Designated [Member] | Other Receivables [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Assets	1.3	3.0
Not Designated [Member] | Accrued Liabilities [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Total Derivatives, Liabilities	$ 1.3	$ 3.8