Quarterly report pursuant to Section 13 or 15(d)

Activity in Deferred Compensation Program (Detail)

v3.19.1
Activity in Deferred Compensation Program (Detail) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Stockholders Equity Note [Roll Forward]    
Balance at beginning of period (1)  
Balance at end of period (1)  
Balance at beginning of period $ 3,021  
Balance at end of period $ 3,467  
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 $ (32) $ (37)
Reinvested dividends (1) (1)
Benefit payments 8 7
Balance at end of period (25) (31)
Deferred Compensation Obligations    
Stockholders Equity Note [Roll Forward]    
Balance at beginning of period 32 37
Reinvested dividends (1) (1)
Benefit payments 8 7
Balance at end of period $ 25 $ 31