Annual report pursuant to Section 13 and 15(d)

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

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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, 2018
Dec. 31, 2017
Dec. 31, 2016
Restricted Units [Member]      
Shares      
Beginning Balance 10,471    
Vested (5,197)    
Granted 4,734    
Reinvested Dividends 352    
Forfeited / Expired (221)    
Ending Balance 10,139 10,471  
Restricted Units Expected to Vest 10,029    
Weighted-Average Grant Date Fair Value      
Beginning Balance $ 99.16    
Vested 97.33    
Granted 110.95 $ 105.62 $ 97.04
Forfeited / Expired 104.74    
Ending Balance 104.47 $ 99.16  
Restricted Units Expected to Vest $ 104.52    
Weighted-Average Remaining Contractual Term (in years)      
Nonvested at December 31, 2018 1 year 4 months 28 days    
Restricted Units Expected to Vest 1 year 4 months 24 days    
Aggregate Intrinsic Value      
Nonvested at December 31, 2018 $ 989    
Restricted Units Expected to Vest $ 978    
Restricted Units      
Shares      
Beginning Balance 1,787    
Vested (912)    
Granted 957    
Reinvested Dividends 79    
Forfeited / Expired (210)    
Ending Balance 1,701 1,787  
Restricted Units Expected to Vest 1,631    
Weighted-Average Grant Date Fair Value      
Beginning Balance $ 105.58    
Vested 105.60    
Granted 111.42 $ 105.65 $ 105.50
Forfeited / Expired 107.98    
Ending Balance 108.63 $ 105.58  
Restricted Units Expected to Vest $ 108.64    
Weighted-Average Remaining Contractual Term (in years)      
Nonvested at December 31, 2018 1 year 5 months 26 days    
Restricted Units Expected to Vest 1 year 6 months    
Aggregate Intrinsic Value      
Nonvested at December 31, 2018 $ 166    
Restricted Units Expected to Vest $ 159