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
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Treasury Stock [Member]
Mar. 31, 2013
Treasury Stock [Member]
Mar. 31, 2014
Deferred Compensation Obligations
Mar. 31, 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 $ 6,247 $ 6,474 $ (69) $ (78) $ 69 $ 78
Reinvested dividends     (1) (1) 1 1
Benefit payments     12 13 (12) (13)
Balance at end of period $ 6,247 $ 6,474 $ (58) $ (66) $ 58 $ 66