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Property And Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property And Equipment [Abstract]  
Summary Of Property And Equipment
 2012 2011
      
Land and improvements$ 45.9 $ 52.3
Building and components  406.0   392.1
Data processing equipment, furniture and other equipment  792.6   725.6
Computer software, purchased and internally developed  1,672.1   1,295.0
Leasehold improvements  303.9   190.2
      
Property and equipment, gross  3,220.5   2,655.2
Accumulated depreciation and amortization  (1,482.2)   (1,237.1)
      
Property and equipment, net$ 1,738.3 $ 1,418.1