Condensed Consolidated Statement Of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)
Balance at Sep. 30, 2009	$ 436.3	$ 1.5	$ 1,599.0	$ (1,078.3)	$ (85.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(45.2)			(45.2)
Dividends declared	(10.8)		(10.8)
Stock-based compensation	8.3		8.3
Stock issued under stock compensation plans	1.0		1.0
Derivative instruments	3.5				3.5
Foreign currency translation	3.4				3.4
Minimum pension liability	8.8				8.8
Balance at Sep. 30, 2010	405.3	1.5	1,597.5	(1,123.5)	(70.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(38.1)			(38.1)
Dividends declared	(10.9)		(10.9)
Stock-based compensation	5.7		5.7
Stock issued under stock compensation plans	1.0	0.1	0.9
Derivative instruments	4.9				4.9
Foreign currency translation	(1.1)				(1.1)
Minimum pension liability	12.2				12.2
Balance at Sep. 30, 2011	379.0	1.6	1,593.2	(1,161.6)	(54.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(108.4)			(108.4)
Dividends declared	(11.0)		(11.0)
Stock-based compensation	4.9		4.9
Stock issued under stock compensation plans	0.2		0.2
Derivative instruments	3.0				3.0
Foreign currency translation	2.9				2.9
Minimum pension liability	(39.4)				(39.4)
Balance at Sep. 30, 2012	$ 231.2	$ 1.6	$ 1,587.3	$ (1,270.0)	$ (87.7)