Financial Instruments (Fair Value Of Derivative Instruments) (Details) (USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010
Total Derivatives, Assets	$ 118.2	$ 114.4
Total Derivatives, Liabilities	43.8	54.2
Forward Exchange Contracts [Member] | Designated As Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Total Derivatives, Assets	45.0	38.7
Forward Exchange Contracts [Member] | Designated As Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Total Derivatives, Liabilities	1.0	19.9
Interest Rate Swap Contracts [Member] | Designated As Hedging Instrument [Member] | Other Receivables [Member]
Total Derivatives, Assets	5.8	6.6
Interest Rate Swap Contracts [Member] | Designated As Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Total Derivatives, Assets	42.4	33.1
Interest Rate Swap Contracts [Member] | Designated As Hedging Instrument [Member] | Accrued Liabilities [Member]
Total Derivatives, Liabilities	3.8	1.3
Interest Rate Swap Contracts [Member] | Designated As Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Total Derivatives, Liabilities	2.2	2.4
Designated As Hedging Instrument [Member]
Total Derivatives, Assets	115.2	108.2
Total Derivatives, Liabilities	40.0	45.9
Designated As Hedging Instrument [Member] | Other Receivables [Member] | Foreign Exchange Forward [Member]
Total Derivatives, Assets	22.0	29.8
Designated As Hedging Instrument [Member] | Accrued Liabilities [Member] | Foreign Exchange Forward [Member]
Total Derivatives, Liabilities	33.0	22.3
Forward Exchange Contracts [Member] | Not Designated [Member] | Other Receivables [Member]
Total Derivatives, Assets	3.0	6.2
Forward Exchange Contracts [Member] | Not Designated [Member] | Accrued Liabilities [Member]
Total Derivatives, Liabilities	$ 3.8	$ 8.3