Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Statement of Other Comprehensive Income [Abstract]      
Net (loss) earnings $ 49.9 $ (424.3) $ 92.0
Pension and postretirement benefit adjustments, net of tax (20.8) (5.3) (4.8)
Foreign currency translation adjustments (0.2) 1.1 3.1
Total comprehensive (loss) income $ 28.9 $ (428.5) $ 90.3