Quarterly report pursuant to Section 13 or 15(d)

Activity in Deferred Compensation Program (Detail)

v3.20.2
Activity in Deferred Compensation Program (Detail) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period     $ 3,267  
Balance at beginning of period     0.4  
Balance at end of period $ 4,363   $ 4,363  
Balance at end of period 0.4   0.4  
Treasury Stock [Member]        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period $ (19) $ (25) $ (26) $ (32)
Balance at beginning of period 0.0 (1.0) 0.0 (1.0)
Reinvested dividends $ (1) $ 0 $ (1) $ (1)
Reinvested dividends 0.0 0.0 0.0 0.0
Benefit payments 0.0 1.0 0.0 1.0
Benefit payments $ 0 $ 0 $ (7) $ (8)
Balance at end of period $ (20) $ (25) $ (20) $ (25)
Balance at end of period 0.0 0.0 0.0 0.0
Deferred Compensation Obligations        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period $ 19 $ 25 $ 26 $ 32
Reinvested dividends 1 0 1 1
Benefit payments 0 0 (7) (8)
Balance at end of period $ 20 $ 25 $ 20 $ 25