Quarterly report pursuant to Section 13 or 15(d)

Roll-forward of Common Stock, Additional Paid-in Capital, Retained Earnings Accounts and Noncontrolling Interest (Detail)

v3.19.1
Roll-forward of Common Stock, Additional Paid-in Capital, Retained Earnings Accounts and Noncontrolling Interest (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period $ 3,021      
Net income attributable to common shareowners 1,111 $ 1,345    
Balance at end of period $ 3,467      
Common stock, cash paid for dividends, per share $ 0.96 $ 0.91    
Non-Controlling Minority Interest        
Balance at beginning of period $ 16 $ 30    
Change in non-controlling minority interest 2 1    
Balance at end of period 18 31    
Class A common stock        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period $ 2 $ 2    
Balance at beginning of period, shares 163 173    
Common stock purchases $ 0 $ 0    
Common stock purchases, shares (1) (1)    
Stock award plans $ 0 $ 0    
Stock award plans, shares 3 3    
Common stock issuances $ 0 $ 0    
Common stock issuances, shares 2 2    
Conversions of class A to class B common stock $ 0 $ 0    
Conversions of Class A to Class B common stock, shares (3) (3)    
Balance at end of period $ 2 $ 2    
Balance at end of period, shares 164 174    
Class B common stock        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period $ 7 $ 7    
Balance at beginning of period, shares 696 687    
Common stock purchases $ 0 $ 0    
Common stock purchases, shares (2) (1)    
Conversions of class A to class B common stock $ 0 $ 0    
Conversions of Class A to Class B common stock, shares (3) (3)    
Balance at end of period $ 7 $ 7    
Balance at end of period, shares 697 689    
Additional Paid-in Capital        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period $ 0 $ 0    
Common stock purchases (251) (136)    
Stock award plans 169 20    
Common stock issuances 114 155    
Option premiums received (paid) (5) (39)    
Balance at end of period 27 0    
Retained Earnings        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period 8,006 5,852    
Common stock purchases 0 (119)    
Net income attributable to common shareowners 1,111 1,345    
Balance at end of period 8,249 6,973    
Dividends ($0.96 and $0.91 per share) (1) (867) (840)    
Reclassification from AOCI pursuant to the early adoption of ASU 2018-02     $ 0 $ 735
Other $ (1) $ 0