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Segment Information (Tables)
6 Months Ended
Jun. 30, 2011
Segment Information [Abstract]  
Revenues and Income from continuing operations before income taxes
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Revenues:
                               
Hospital operations
  $ 3,361,706     $ 3,018,147     $ 6,646,174     $ 6,018,587  
Corporate and all other
    72,123       62,499       141,707       130,671  
 
                       
Total
  $ 3,433,829     $ 3,080,646     $ 6,787,881     $ 6,149,258  
 
                       
 
                               
Income from continuing operations before income taxes:
                               
Hospital operations
  $ 184,426     $ 171,711     $ 362,539     $ 331,010  
Corporate and all other
    (46,731 )     (40,571 )     (89,147 )     (75,964 )
 
                       
Total
  $ 137,695     $ 131,140     $ 273,392     $ 255,046