Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013
Income Tax Disclosures [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 31.1		$ 31.0
Income tax expense (benefit)	66.5	41.6
Effective Income Tax Rate Reconciliation, Percent	35.10%	38.60%
Deferred tax assets net of DTL	$ 609.6		$ 617.6