Commitments and Contingencies (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended	60 Months Ended	2 Months Ended		12 Months Ended
	Sep. 30, 2013 Cash performance unit awards	Sep. 30, 2013 Cash performance unit awards	Sep. 30, 2012 Cash performance unit awards - 2012 grants	Sep. 30, 2011 Cash performance unit awards - 2012 grants	Sep. 30, 2014 Cash performance unit awards - 2012 grants	Sep. 30, 2013 Cash performance unit awards - 2012 grants	Sep. 30, 2014 Cash performance unit awards - 2013 grants	Sep. 30, 2013 SARs	Sep. 30, 2012 SARs	Sep. 30, 2011 SARs	Sep. 30, 2013 SARs - 2011 Awards	Sep. 30, 2011 SARs - 2011 Awards	Sep. 30, 2013 SARs - 2012 Awards	Sep. 30, 2012 SARs - 2012 Awards	Sep. 30, 2013 Minimum SARs - 2012 Awards	Sep. 30, 2013 Employment Agreements	Sep. 30, 2013 Executive Change In Control Agreements
Commitments and Contingencies
Compensation arrangements original term of employment agreements, maximum																3 years
Employee agreement terms																1 year
Percentage of CEO salary																42.50%
Aggregate salary commitment for salaries and other obligations under all employment agreements assuming no agreements are renewed																$ 1.9
Aggregate termination benefits																5.9
Termination benefits expensed and accrued																1.8
Aggregate value of severance payments and excess of market value of stock-based awards																	23.5
Aggregate value of severance payments and excess of market value of stock-based awards expensed and accrued																	11.3
Performance period	5 years
Amount of free cash flow expenses incurred		5.4
Amount of free cash flow expenses accrued and unpaid	2.6	2.6
Percentage of performance units vested					50.00%	50.00%
Average stock price period			60 days	60 days										60 days
Amount recorded for performance unit award grants						9.6	4.8
Grants approved by committee to employees for cash settled stock appreciation rights (in shares)												0.4		1.0
Grants approved by committee to employees for cash settled stock appreciation rights that remain outstanding (in shares)											0.2		0.8
Ending period for expected liability adjustment						September 30, 2016					September 30, 2015
Amount accrued for awards											1.1		4.9
Grant-date stock price (in dollars per share)											$ 3.81		$ 1.85
Percentage of stock price on grant date															135.00%
Threshold stock price at which SARS will vest (in dollars per share)															$ 2.50
Compensation expense								$ 4.6	$ 3.6	$ 0