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Guarantees and Indemnifications (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Jun. 30, 2011
Sep. 30, 2010
Jun. 30, 2010
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]          
Beginning Balance     $ 30.3 $ 28.3 $ 29.5
Accrued to expense 0.3 1.1      
Payments made (2.7) (2.3)      
Ending Balance 27.9   30.3 28.3 29.5
Current portion of warranty reserves (12.0)     (10.0)  
Long-term portion of warranty reserves $ 15.9     $ 18.3