Consolidated Statement Of Stockholders' Equity - 3 months ended Dec. 31, 2015 - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)	Noncontrolling Interest [Member]
Balance at Sep. 30, 2015	$ 367.8	$ 1.6	$ 1,574.8	$ (1,142.8)	$ (67.3)	$ 1.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared	(3.2)	0.0	(3.2)	0.0	0.0	0.0
Stock-based compensation	1.3	0.0	1.3	0.0	0.0	0.0
Excess tax benefit on stock option exercises	0.7	0.0	0.7	0.0	0.0	0.0
Shares retained for employee taxes	(2.9)	0.0		0.0	0.0	0.0
Stock issued under stock compensation plans	0.4	0.0	0.4	0.0	0.0	0.0
Other Comprehensive Income (Loss), Net of Tax	(3.7)	0.0	0.0	0.0	(3.7)	0.0
Net Income (Loss) Attributable to Parent	6.2	0.0	0.0		0.0
Net Income (Loss) Attributable to Noncontrolling Interest						(0.1)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6.1
Balance at Dec. 31, 2015	$ 366.5	$ 1.6	$ 1,571.1	$ (1,136.6)	$ (71.0)	$ 1.4