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Consolidated Balance Sheets (Parentheticals) (USD $)
In Millions, except Share data, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Balance Sheet Parentheticals [Abstract]    
Receivables, allowances $ 75 $ 76
Class A Common Stock
   
Class Of Stock [Line Items]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 375,000,000 375,000,000
Common stock, shares, issued 39,000,000 39,000,000
Class B Common Stock
   
Class Of Stock [Line Items]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 5,000,000,000 5,000,000,000
Common stock, shares, issued 806,000,000 801,000,000
Treasury stock, at cost, Class B shares 270,000,000 244,000,000