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 $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stockholders Equity Note [Line Items]                      
Document Fiscal Year Focus                 2013    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Common stock purchases, Shares (5.9)               (43.2) (21.8) (38.7)
Balance at beginning of year       $ 4,653         $ 4,653    
Net income attributable to controlling interests 1,167 1,097 1,071 1,037 (1,748) 469 1,116 970 4,372 807 3,804
Common stock purchases (600)               (3,846) (1,638) (2,669)
Balance at end of period 6,474       4,653       6,474 4,653  
Class A Common Stock
                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Balance at beginning of year, Shares       225       240 225 240 258
Common stock purchases, Shares                 (8.0) (9.0) (7.0)
Stock award plans, Shares                 9 8 7
Common stock issuances, Shares                 4 3 3
Conversions of class A to class B common stock, Shares                 (18) (17) (21)
Balance at end of year, Shares         225         225 240
Balance at beginning of year       3       3 3 3 3
Common stock purchases                 (1) 0 0
Stock award plans                 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       3       2 3 3
Class B Common Stock
                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Balance at beginning of year, Shares       729       725 729 725 735
Common stock purchases, Shares                 (35.0) (13.0) (31.0)
Conversions of class A to class B common stock, Shares                 18 17 21
Balance at end of year, Shares         729         729 725
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]                      
Balance at beginning of year       0       0 0 0 0
Stock award plans                 554 444 388
Common stock purchases                 (768) (943) (475)
Common stock issuances                 307 293 287
Option Premiums Received (Paid)                 (93) 206 (200)
Balance at end of period 0       0       0 0 0
Retained Earnings
                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Balance at beginning of year       7,997       10,128 7,997 10,128 10,604
Net income attributable to controlling interests                 4,372 807 3,804
Dividends ($2.48, $2.28 and $2.08 per share)                 (2,367) (2,243) (2,086)
Common stock purchases                 (3,077) (695) (2,194)
Balance at end of period $ 6,925       $ 7,997       $ 6,925 $ 7,997 $ 10,128