Financial Instruments (Schedule of Gain/Loss Related to Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	$ (2.4)	[1]	$ (5.8)	[1]
Forward Exchange Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	(2.4)	[1]	(5.8)	[1]
Foreign Currency Debt [Member]
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	0	[1]	0	[1]
Other Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in net income (loss)	0	[1],[2]	0	[1],[2]
Cash Flow Hedges [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)	(21.8)		0.8
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)	1.3		8.4
Net (gain) loss reclassified from OCI to other income, net (effective portion)	9.6		1.2
Net (gain) loss reclassified from OCI to interest expense (effective portion)	1.2		1.2
Net (gain) loss reclassified from OCI to other income, net (ineffective portion)	0.3		0.7
Cash Flow Hedges [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)	(14.2)		6.4
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)	1.3		8.4
Net (gain) loss reclassified from OCI to other income, net (effective portion)	9.6		1.2
Net (gain) loss reclassified from OCI to interest expense (effective portion)	(0.2)		0
Net (gain) loss reclassified from OCI to other income, net (ineffective portion)	0.3		0.7
Cash Flow Hedges [Member] | Foreign Currency Debt [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)	0		0
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)	0		0
Net (gain) loss reclassified from OCI to other income, net (effective portion)	0		0
Net (gain) loss reclassified from OCI to interest expense (effective portion)	0		0
Net (gain) loss reclassified from OCI to other income, net (ineffective portion)	0		0
Cash Flow Hedges [Member] | Other Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI (effective portion)	(7.6)	[2]	(5.6)	[2]
Net (gain) loss reclassified from OCI to sales/cost of sales (effective portion)	0	[2]	0	[2]
Net (gain) loss reclassified from OCI to other income, net (effective portion)	0	[2]	0	[2]
Net (gain) loss reclassified from OCI to interest expense (effective portion)	1.4	[2]	1.2	[2]
Net (gain) loss reclassified from OCI to other income, net (ineffective portion)	0	[2]	0	[2]
Fair Value Hedges [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	5.8	[3]	9.4	[3]
Fair Value Hedges [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	0	[3]	0	[3]
Fair Value Hedges [Member] | Foreign Currency Debt [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	0	[3]	0	[3]
Fair Value Hedges [Member] | Other Contracts [Member]
Derivative [Line Items]
Net (gain) loss recognized in interest expense	5.8	[2],[3]	9.4	[2],[3]
Net Investment Hedges [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI	34.3		22.6
Net Investment Hedges [Member] | Forward Exchange Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI	25.0		5.7
Net Investment Hedges [Member] | Foreign Currency Debt [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI	11.4		16.9
Net Investment Hedges [Member] | Other Contracts [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI	$ (2.1)	[2]	$ 0	[2]

[1] The impact of the non-designated hedges noted above was largely offset by gains and losses, respectively, resulting from the impact of changes in exchange rates on recognized assets and liabilities denominated in nonfunctional currencies.

[2] Other includes the impact on other comprehensive income (OCI) and earnings primarily related to interest rate hedges.

[3] The impact of fair value hedges noted above was largely offset by gains and losses resulting from the impact of changes in related interest rates on recognized outstanding debt.