Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	$ 28.9	$ 20.7	$ 24.6
Additions Charged to Costs and Expenses	7.8	10.2	0.7
Additions Charged to Other Accounts	0	0	0
Deductions	5.9	2.0	4.6
Balance at End of Year	30.8	28.9	20.7
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	32.8	26.7	43.8
Additions Charged to Costs and Expenses	1.0	10.6	2.3
Additions Charged to Other Accounts	0.5	0	0
Deductions	2.5	4.5	19.4
Balance at End of Year	$ 31.8	$ 32.8	$ 26.7