Annual report pursuant to Section 13 and 15(d)

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

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SHAREOWNERS' EQUITY - Roll-forward of Common Stock, Additional Paid-in Capital, and Retained Earnings Accounts (Detail) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Common stock purchases, Shares (2.6)               (8.9) (16.1) (25.2)
Balance at beginning of year       $ 994         $ 994    
Net income attributable to controlling interests $ 453 $ 1,508 $ 1,485 $ 1,345 $ 1,096 $ 1,259 $ 1,384 $ 1,166 4,791 $ 4,905 $ 3,422
Common stock purchases (300)               (1,000) (1,816) (2,680)
Balance at end of period $ 3,021       $ 994       3,021 994  
Payments for Repurchase of Common Stock                 1,011 1,813 2,678
Stockholders' Equity, Other                 $ (42) $ (2) $ 0
Common Stock | Class A Common Stock:                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Balance at beginning of year, Shares       173.0       180.0 173.0 180.0 194.0
Common stock purchases, Shares                 (3.0) (4.0) (4.0)
Stock award plans, Shares                 3.0 4.0 5.0
Common stock issuances, Shares                 4.0 3.0 2.0
Conversions of class A to class B common stock, Shares                 (14.0) (10.0) (17.0)
Balance at end of year, Shares 163.0       173.0       163.0 173.0 180.0
Balance at beginning of year       $ 2       $ 2 $ 2 $ 2 $ 2
Stock award plans                 0 0 0
Common stock purchases                 0 0 0
Common stock issuances                 0 0 0
Conversions of class A to class B common stock                 0 0 0
Balance at end of period $ 2       $ 2       $ 2 $ 2 $ 2
Common Stock | Class B Common Stock:                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Balance at beginning of year, Shares       687.0       689.0 687.0 689.0 693.0
Common stock purchases, Shares                 (5.0) (12.0) (21.0)
Conversions of class A to class B common stock, Shares                 14.0 10.0 17.0
Balance at end of year, Shares 696.0       687.0       696.0 687.0 689.0
Balance at beginning of year       $ 7       $ 7 $ 7 $ 7 $ 7
Common stock purchases                 0 0 0
Conversions of class A to class B common stock                 0 0 0
Balance at end of period $ 7       $ 7       7 7 7
Additional Paid-In Capital:                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Option Premiums Received (Paid)                 (34) (54) (54)
Balance at beginning of year       0       0 0 0 0
Stock award plans                 419 396 541
Common stock purchases                 (859) (813) (898)
Common stock issuances                 406 363 303
Balance at end of period 0       0       0 0 0
Retained Earnings:                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Balance at beginning of year       $ 5,852       $ 4,880 5,852 4,880 6,011
Net income attributable to controlling interests                 4,791 4,905 3,422
Dividends ($xxx, $3.32, and $3.12 per share)                 (3,189) (2,928) (2,771)
Common stock purchases                 (141) (1,003) (1,782)
Balance at end of period 8,006       5,852       8,006 5,852 4,880
Cumulative Effect of New Accounting Principle in Period of Adoption $ 735       $ 0       $ 735 $ 0 $ 0