Common Stock, Options, and Stock Compensation (Details 1) (Restricted Stock [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2011
Restricted Stock [Member]
Summary of the restricted stock awards (RSA) activity
Outstanding Shares at beginning of year	1,448,833
Granted, Shares	431,160
Released, Shares	(597,454)	[1]
Forfeited, Shares	(77,226)
Outstanding Shares at end of year	1,205,313		1,448,833
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average grant date fair value outstanding at beginning of year	$ 18.47
Granted, Weighted average grant date fair value	$ 20.43		$ 29.22	$ 20.34
Released, Weighted average grant date fair value	$ 17.95	[1]
Forfeited, Weighted average grant date fair value	$ 24.08
Weighted average grant date fair value outstanding at end of year	$ 19.06		$ 18.47
Weighted average grant-date fair value per share granted	$ 20.43		$ 29.22	$ 20.34
Total grant date fair value of RSAs vested	$ 10.7		$ 4.1	$ 13.5

[1] Approximately 188,000 shares were withheld to satisfy related federal income tax withholding.