Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

v2.4.0.6
Earnings Per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Income per common share    
Net income attributable to common shareholders $ 14.3 $ 31.3
Weighted-average shares outstanding - basic (in shares) 62.4 62.0
Effect of dilutive stock options and unvested time based restricted stock awards 0.2  
Weighted-average shares outstanding - diluted (in shares) 62.6 62.0
Earnings per share - basic and diluted (in dollars per share) $ 0.23 $ 0.50
Restricted stock units and stock option awards
   
Income per common share    
Stock-based awards excluded from the computation of diluted earnings per share (in shares) 2.4 2.2
Performance-based stock awards
   
Income per common share    
Stock-based awards excluded from the computation of diluted earnings per share (in shares) 2.0 1.8