Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Income Taxes        
Effective tax rates (as a percent) 31.80% 41.20% 34.30% 36.40%
Activity within the reserve for unrecognized tax benefits        
Balance at the beginning of the period     $ 7.8  
Additions for current-year tax positions 0.2      
Additions for prior-year tax positions 0.1      
Reductions for prior-year tax positions (0.2)      
Balance at the end of the period 7.9   7.9  
Other amounts accrued for interest and penalties $ 1.5   $ 1.5