Financial Instruments (Fair Value of Derivative Instruments) (Details) (USD $) In Millions	Jun. 30, 2011	Sep. 30, 2010
Total Derivatives, Assets	$ 72.2	$ 114.4
Total Derivatives, Liabilities	50.6	54.2
Forward Exchange Contracts [Member] | Designated as Hedging Instrument [Member] | Other Receivables [Member]
Total Derivatives, Assets	22.1
Forward Exchange Contracts [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Total Derivatives, Assets	18.7	38.7
Forward Exchange Contracts [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Total Derivatives, Liabilities	45.5	22.3
Forward Exchange Contracts [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Total Derivatives, Liabilities	0.5	19.9
Interest Rate Swaps Contracts [Member] | Designated as Hedging Instrument [Member] | Other Receivables [Member]
Total Derivatives, Assets	10.8	6.6
Interest Rate Swaps Contracts [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Total Derivatives, Assets	18.3	33.1
Interest Rate Swaps Contracts [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Total Derivatives, Liabilities		1.3
Interest Rate Swaps Contracts [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Total Derivatives, Liabilities	3.1	2.4
Designated as Hedging Instrument [Member]
Total Derivatives, Assets	69.9	108.2
Total Derivatives, Liabilities	49.1	45.9
Designated as Hedging Instrument [Member] | Other Receivables [Member] | Foreign Exchange Contracts [Member]
Total Derivatives, Assets		29.8
Forward Exchange Contracts [Member] | Hedges Not Designated [Member] | Other Receivables [Member]
Total Derivatives, Assets	2.3	6.2
Forward Exchange Contracts [Member] | Hedges Not Designated [Member] | Accrued Liabilities [Member]
Total Derivatives, Liabilities	$ 1.5	$ 8.3