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Other Noncurrent Liabilities and Redeemable/Noncontrolling Interests (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2011
Dec. 31, 2010
Redeemable noncontrolling interests balances $ 215 $ 212
Noncontrolling interests balances $ 47 $ 45
Acute Care [Member] | Las Vegas, Nevada [Member]
   
Percentage of noncontrolling, minority ownership interests held by outside owners 28.00%  
Acute Care [Member] | Washington, D.C. [Member]
   
Percentage of noncontrolling, minority ownership interests held by outside owners 20.00%  
Acute Care [Member] | Laredo, Texas [Member]
   
Percentage of noncontrolling, minority ownership interests held by outside owners 11.00%  
Behavioral Health [Member] | Philadelphia, Pennsylvania [Member]
   
Percentage of noncontrolling, minority ownership interests held by outside owners 20.00%