Quarterly report pursuant to Section 13 or 15(d)

SHAREOWNERS' EQUITY - Additional Information (Detail)

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SHAREOWNERS' EQUITY - Additional Information (Detail) (USD $)
 0 Months Ended 3 Months Ended 9 Months Ended
May 03, 2012
Sep. 30, 2012
Classes_of_Common_Stock
Sep. 30, 2012
Sep. 30, 2011
Stockholders Equity Note [Line Items]        
Classes of Common Stock, Number   2    
Preferred stock, shares authorized   200,000,000 200,000,000  
Preferred stock, par value   $ 0.01 $ 0.01  
Preferred stock, issued   0 0  
Total of Class A and Class B common stock, repurchased, value     $ 1,392,000,000 $ 2,190,000,000
Common stock authorized for purchase, amount 5,000,000,000      
Common stock purchases     18,500,000 31,700,000
Settled Options
        
Stockholders Equity Note [Line Items]        
Option premiums received (paid)     (206,000,000) 150,000,000
Class A common stock
        
Stockholders Equity Note [Line Items]        
Votes per common share   10 10  
Common stock, par value   $ 0.01 $ 0.01  
Common stock, shares authorized   4,600,000,000 4,600,000,000  
Common stock purchases     6,000,000 6,000,000
Class B common stock
        
Stockholders Equity Note [Line Items]        
Votes per common share   1 1  
Common stock, par value   $ 0.01 $ 0.01  
Common stock, shares authorized   5,600,000,000 5,600,000,000  
Common stock purchases     13,000,000 26,000,000
Additional Paid-in Capital
        
Stockholders Equity Note [Line Items]        
Total of Class A and Class B common stock, repurchased, value     827,000,000 417,000,000
Option premiums received (paid)     206,000,000 (150,000,000)
StockRepurchaseProgramRepurchaseAmountUnsettled   $ 0 $ 0 $ 0