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, 2013	$ 328.2	$ 1.6	$ 1,584.4	$ (1,229.2)	$ (28.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10.8	0	0	10.8	0
Dividends declared	(5.6)	0	(5.6)	0	0
Stock-based compensation	3.6	0	3.6	0	0
Shares retained for employee taxes	(3.1)	0		0	0
Stock issued under stock compensation plans	1.8	0	1.8	0	0
Other Comprehensive Income (Loss), Net of Tax	(10.0)	0	0	0	(10.0)
Balance at Mar. 31, 2014	$ 325.7	$ 1.6	$ 1,581.1	$ (1,218.4)	$ (38.6)