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Properties
12 Months Ended
Dec. 31, 2011
Properties [Abstract]  
Properties

8. Properties

Properties comprise the following:

 

December 31 (millions)    2011      2010  

Land

   $ 3.3       $ 3.8   

Buildings

     76.8         77.1   

Machinery and office equipment

     760.3         839.7   

Internal-use software

     315.7         303.9   

Rental equipment

     101.1         114.5   

Total properties

   $ 1,257.2       $ 1,339.0