Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Roll-forward of Common Stock, Additional Paid-in Capital, and Retained Earnings Accounts (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period     $ 405  
Net income attributable to common shareowners $ 1,264 $ 1,270 3,806 $ 3,670
Balance at end of period 1,509   $ 1,509  
Common stock, cash paid for dividends, per share     $ 2.49 $ 2.34
Class A common stock        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period     $ 2 $ 2
Balance at beginning of period, shares     180 194
Common stock purchases     $ 0 $ 0
Common stock purchases, shares     (3) (4)
Stock award plans     $ 0 $ 0
Stock award plans, shares     4 5
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     (7) (12)
Balance at end of period $ 2 $ 2 $ 2 $ 2
Balance at end of period, shares 176 185 176 185
Class B common stock        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period     $ 7 $ 7
Balance at beginning of period, shares     689 693
Common stock purchases     $ 0 $ 0
Common stock purchases, shares     (9) (16)
Conversions of class A to class B common stock     $ 0 $ 0
Conversions of Class A to Class B common stock, shares     (7) (12)
Balance at end of period $ 7 $ 7 $ 7 $ 7
Balance at end of period, shares 687 689 687 689
Additional Paid-in Capital        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period     $ 0 $ 0
Common stock purchases     (604) (811)
Stock award plans     283 423
Common stock issuances     268 233
Option premiums received (paid)     53 155
Balance at end of period $ 0 $ 0 0 0
Retained Earnings        
Stockholders Equity Note [Roll Forward]        
Balance at beginning of period     4,879 6,001
Common stock purchases     (748) (1,193)
Net income attributable to common shareowners     3,806 3,670
Balance at end of period $ 5,724 $ 6,385 5,724 6,385
Dividends ($2.49 and $2.34 per share)     $ (2,213) $ (2,093)