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Warranties (Tables)
12 Months Ended
Dec. 31, 2011
Warranties / Commitments and Contingencies [Abstract]  
Changes in the accruals for warranties
                         
    December 31,
2011
    December 31,
2010
    December 31,
2009
 
    (in millions)  

Beginning balance

  $ 13.2     $ 19.6     $ 25.7  

Warranty costs incurred

    (6.3     (5.7     (8.6

Warranty originations and revisions

    9.1       1.9       9.8  

Warranty expirations

    (2.5     (2.6     (7.3
   

 

 

   

 

 

   

 

 

 

Ending balance

  $   13.5     $   13.2     $   19.6