Quarterly report pursuant to Section 13 or 15(d)

Comprehensive Income and Accumulated Other Comprehensive Loss (Details)

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Comprehensive Income and Accumulated Other Comprehensive Loss (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2011
Sep. 30, 2011
Comprehensive income, net of tax          
Net income $ 27.4 $ 33.0 $ 58.7 $ 60.1  
Change in currency translation adjustment 7.9 4.5 1.3 14.3  
Change in pension and postretirement 1.1 0.7 1.2 1.5  
Change in net unrealized gains (losses) on derivative instruments (0.3) (0.2) (0.4) (0.3)  
Change in net unrealized gains (losses) on available-for-sale securities 0.2 (0.2) (0.9) 0.1  
Comprehensive income 36.3 37.8 59.9 75.7  
Accumulated other comprehensive loss, net of tax          
Currency translation adjustment 21.7   21.7   20.4
Pension and postretirement (59.3)   (59.3)   (60.5)
Net unrealized gain (loss) on derivative instruments (0.2)   (0.2)   0.2
Net unrealized gain (loss) on available-for-sale securities (0.5)   (0.5)   0.4
Accumulated other comprehensive loss $ (38.3)   $ (38.3)   $ (39.5)