Quarterly report pursuant to Section 13 or 15(d)

Activity in Deferred Compensation Program (Detail)

v3.4.0.3
Activity in Deferred Compensation Program (Detail) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 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 $ 2,457  
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) (1)
Benefit payments 9 11
Balance at end of period (43) (49)
Deferred Compensation Obligations    
Stockholders Equity Note [Roll Forward]    
Balance at beginning of period 51 59
Reinvested dividends 1 1
Benefit payments (9) (11)
Balance at end of period $ 43 $ 49