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)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
shares
Shares  
Ending Balance | shares 2,771
Exercisable at December 31, 2015 | shares 2,451
Weighted Average Exercise Price  
Ending Balance | $ / shares $ 77.33
Exercisable at December 31, 2015 | $ / shares $ 75.31
Weighted Average Remaining Contractual Term (in years)  
Outstanding at December 31, 2015 2 years 11 months 9 days
Nonqualified Stock Options  
Shares  
Beginning Balance | shares 3,691
Exercised | shares (1,060)
Granted | shares 160
Forfeited / Expired | shares (20)
Ending Balance | shares 2,771
Options Vested and Expected to Vest | shares 2,771
Exercisable at December 31, 2015 | shares 2,451
Weighted Average Exercise Price  
Beginning Balance | $ / shares $ 75.07
Exercised | $ / shares 73.25
Granted | $ / shares 101.93
Forfeited / Expired | $ / shares 72.47
Ending Balance | $ / shares 77.33
Options Vested and Expected to Vest | $ / shares 77.33
Exercisable at December 31, 2015 | $ / shares $ 75.31
Weighted Average Remaining Contractual Term (in years)  
Outstanding at December 31, 2015 2 years 11 months 8 days
Options Vested and Expected to Vest 2 years 11 months 8 days
Exercisable at December 31, 2015 2 years 3 months 7 days
Aggregate Intrinsic Value  
Outstanding at December 31, 2015 | $ $ 53
Options Vested and Expected to Vest | $ 53
Exercisable at December 31, 2015 | $ $ 51