Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	$ 30.8	$ 28.9	$ 20.7
Additions Charged to Costs and Expenses	2.8	7.8	10.2
Additions Charged to Other Accounts	0	0	0
Deductions	8.3	5.9	2.0
Balance at End of Year	25.3	30.8	28.9
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Year	31.8	32.8	26.7
Additions Charged to Costs and Expenses	2.3	1.0	10.6
Additions Charged to Other Accounts	0	0.5	0
Deductions	5.8	2.5	4.5
Balance at End of Year	$ 28.3	$ 31.8	$ 32.8