Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Options to Purchase Shares of Class A Common Stock Issued and Outstanding (Detail)

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STOCK-BASED COMPENSATION - Options to Purchase Shares of Class A Common Stock Issued and Outstanding (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Shares  
Ending Balance 10,595
Exercisable at December 31, 2012 10,115
Weighted Average Exercise Price  
Ending Balance $ 72.04
Exercisable at December 31, 2012 $ 72.09
Weighted Average Remaining Contractual Term (in years)  
Outstanding at December 31, 2012 3 years 0 months 10 days
Nonqualified Stock Options
  
Shares  
Beginning Balance 13,199
Exercised (2,778)
Granted 187
Forfeited / Expired (13)
Ending Balance 10,595
Options Vested and Expected to Vest 10,595
Exercisable at December 31, 2012 10,115
Weighted Average Exercise Price  
Beginning Balance $ 70.18
Exercised $ 63.50
Granted $ 76.94
Forfeited / Expired $ 82.74
Ending Balance $ 72.04
Options Vested and Expected to Vest $ 72.04
Exercisable at December 31, 2012 $ 72.09
Weighted Average Remaining Contractual Term (in years)  
Outstanding at December 31, 2012 3 years 0 months 10 days
Options Vested and Expected to Vest 3 years 0 months 10 days
Exercisable at December 31, 2012 2 years 9 months 16 days
Aggregate Intrinsic Value  
Outstanding at December 31, 2012 $ 34
Options Vested and Expected to Vest 34
Exercisable at December 31, 2012 $ 32