Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Restricted Stock Units Outstanding, Including Reinvested Dividends (Detail)

v3.3.1.900
STOCK-BASED COMPENSATION - Restricted Stock Units Outstanding, Including Reinvested Dividends (Detail) - Long Term Incentive Performance Award - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Restricted Units [Member]      
Shares      
Beginning Balance 11,559    
Vested (5,867)    
Granted 5,118    
Reinvested Dividends 359    
Forfeited / Expired (157)    
Ending Balance 11,012 11,559  
Restricted Units Expected to Vest 10,783    
Weighted Average Grant Date Fair Value      
Beginning Balance $ 82.58    
Vested 80.27    
Granted 100.63 $ 92.35 $ 80.18
Forfeited / Expired 90.23    
Ending Balance 90.71 $ 82.58  
Restricted Units Expected to Vest $ 90.77    
Weighted Average Remaining Contractual Term (in years)      
Nonvested at December 31, 2015 1 year 4 months 13 days    
Restricted Units Expected to Vest 1 year 4 months 10 days    
Aggregate Intrinsic Value      
Nonvested at December 31, 2015 $ 1,060    
Restricted Units Expected to Vest $ 1,038    
Restricted Units      
Shares      
Beginning Balance 815    
Vested (57)    
Granted 912    
Reinvested Dividends 43    
Forfeited / Expired (98)    
Ending Balance 1,615 815  
Restricted Units Expected to Vest 1,547    
Weighted Average Grant Date Fair Value      
Beginning Balance $ 96.98    
Vested 96.90    
Granted 96.64 $ 96.98  
Forfeited / Expired 96.81    
Ending Balance 96.80 $ 96.98  
Restricted Units Expected to Vest $ 96.80    
Weighted Average Remaining Contractual Term (in years)      
Nonvested at December 31, 2015 1 year 7 months 13 days    
Restricted Units Expected to Vest 1 year 7 months 13 days    
Aggregate Intrinsic Value      
Nonvested at December 31, 2015 $ 155    
Restricted Units Expected to Vest $ 149