Quarterly report pursuant to Section 13 or 15(d)

Activity in Deferred Compensation Program (Detail)

v3.5.0.2
Activity in Deferred Compensation Program (Detail) - USD ($)
shares in Millions, $ in Millions
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Stockholders Equity Note [Roll Forward]    
Balance at beginning of period (1)  
Balance at end of period (1)  
Balance at beginning of period $ 2,470  
Balance at end of period $ 2,626  
Treasury Stock [Member]    
Stockholders Equity Note [Roll Forward]    
Balance at beginning of period (1) (1)
Reinvested dividends 0 0
Benefit payments 0 0
Balance at end of period (1) (1)
Balance at beginning of period $ (51) $ (59)
Reinvested dividends (1) (2)
Benefit payments 8 11
Balance at end of period (44) (50)
Deferred Compensation Obligations    
Stockholders Equity Note [Roll Forward]    
Balance at beginning of period 51 59
Reinvested dividends 1 2
Benefit payments (8) (11)
Balance at end of period $ 44 $ 50