Quarterly report pursuant to Section 13 or 15(d)

Activity in Deferred Compensation Program (Detail)

v2.4.0.8
Activity in Deferred Compensation Program (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Treasury Stock [Member]
Sep. 30, 2013
Treasury Stock [Member]
Sep. 30, 2014
Deferred Compensation Obligations
Sep. 30, 2013
Deferred Compensation Obligations
Stockholders Equity Note [Roll Forward]            
Balance at beginning of period (1) (1) (1) (1)    
Reinvested dividends     0 0    
Benefit payments     0 0    
Balance at end of period (1) (1) (1) (1)    
Balance at beginning of period $ 5,627 $ 6,474 $ (69) $ (78) $ 69 $ 78
Reinvested dividends     (2) (3) 2 3
Benefit payments     12 13 (12) (13)
Balance at end of period $ 5,627 $ 6,474 $ (59) $ (68) $ 59 $ 68