Employee Benefit Plans (Details) - Other Share-based Compensation Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2011
Weighted average grant date fair value per share:
Restricted shares granted (in Dollars per share)	$ 14.26	[1]
Total intrinsic value of options exercised	$ 6.4		$ 3.8	$ 5.6
Total fair value of restricted shares vested	17.3		11.6	14.9
Tax benefit realized for tax return deductions	8.1		5.5	7.1
Other information [Abstract]
Shares available for future grant	24,600,000
Unrecognized costs for outstanding awards	$ 64.8
Weighted average future recognition period	1 year 9 months 18 days
Options Granted [Member]
Weighted average grant date fair value per share:
Options granted (in Dollars per share)	$ 0		$ 5.70	$ 5.33
Restricted Shares Granted [Member]
Weighted average grant date fair value per share:
Restricted shares granted (in Dollars per share)	$ 14.26		$ 15.05	$ 14.25

[1] certain awards require satisfaction of a combination of performance and market conditions