Valuation and Qualifying Accounts (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	$ 20.7	$ 24.6	$ 20.2
Additions Charged to Costs and Expenses	10.2	0.7	10.1
Additions Charged to Other Accounts
Deductions	2.0	4.6	5.7
Balance at End of Year	28.9	20.7	24.6
Allowance for Excess and Obsolete Inventory [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	46.3	53.2	39.7
Additions Charged to Costs and Expenses	18.9	20.4	27.6
Additions Charged to Other Accounts
Deductions	18.9	27.3	14.1
Balance at End of Year	46.3	46.3	53.2
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	26.7	43.8	45.1
Additions Charged to Costs and Expenses	10.6	2.3	4.2
Additions Charged to Other Accounts
Deductions	4.5	19.4	5.5
Balance at End of Year	$ 32.8	$ 26.7	$ 43.8