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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, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Common stock purchases, Shares | (2.6) |  |  |  |  |  |  |  | (16.1) | (25.2) | (26.8)
Balance at beginning of year |  |  |  | $ 405 |  |  |  |  | $ 405 |  |
Net income attributable to controlling interests | $ 1,104 | $ 1,264 | $ 1,384 | $ 1,158 | $ (239) | $ 1,270 | $ 1,269 | $ 1,131 | 4,910 | $ 3,431 | $ 4,844
Common stock purchases | (300) |  |  |  |  |  |  |  | (1,816) | (2,680) | (2,711)
Balance at end of period | $ 1,000 |  |  |  | $ 405 |  |  |  | 1,000 | 405 |
Payments for Repurchase of Common Stock |  |  |  |  |  |  |  |  | $ 1,813 | $ 2,678 | $ 2,702
Common Stock | Class A Common Stock: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year, Shares |  |  |  | 180.0 |  |  |  | 194.0 | 180.0 | 194.0 | 201.0
Common stock purchases, Shares |  |  |  |  |  |  |  |  | (4.0) | (4.0) | (4.0)
Stock award plans, Shares |  |  |  |  |  |  |  |  | 4.0 | 5.0 | 5.0
Common stock issuances, Shares |  |  |  |  |  |  |  |  | 3.0 | 2.0 | 3.0
Conversions of class A to class B common stock, Shares |  |  |  |  |  |  |  |  | (10.0) | (17.0) | (11.0)
Balance at end of year, Shares | 173.0 |  |  |  | 180.0 |  |  |  | 173.0 | 180.0 | 194.0
Balance at beginning of year |  |  |  | $ 2 |  |  |  | $ 2 | $ 2 | $ 2 | $ 2
Common stock purchases |  |  |  |  |  |  |  |  | 0 | 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 |  |  |  | $ 2 |  |  |  | $ 2 | $ 2 | $ 2
Common Stock | Class B Common Stock: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year, Shares |  |  |  | 689.0 |  |  |  | 693.0 | 689.0 | 693.0 | 705.0
Common stock purchases, Shares |  |  |  |  |  |  |  |  | (12.0) | (21.0) | (23.0)
Conversions of class A to class B common stock, Shares |  |  |  |  |  |  |  |  | 10.0 | 17.0 | 11.0
Balance at end of year, Shares | 687.0 |  |  |  | 689.0 |  |  |  | 687.0 | 689.0 | 693.0
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] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 0 |  |  |  | 0 | 0 | 0 | 0
Stock award plans |  |  |  |  |  |  |  |  | 396 | 541 | 492
Common stock purchases |  |  |  |  |  |  |  |  | (813) | (898) | (791)
Common stock issuances |  |  |  |  |  |  |  |  | 363 | 303 | 316
Option premiums received (paid) |  |  |  |  |  |  |  |  | 54 | 54 | (17)
Balance at end of period | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Retained Earnings: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | $ 4,879 |  |  |  | $ 6,001 | 4,879 | 6,001 | 5,726
Net income attributable to controlling interests |  |  |  |  |  |  |  |  | 4,910 | 3,431 | 4,844
Dividends ($3.32, $3.12, and $2.92 per share) |  |  |  |  |  |  |  |  | (2,928) | (2,771) | (2,649)
Common stock purchases |  |  |  |  |  |  |  |  | (1,003) | (1,782) | (1,920)
Balance at end of period | $ 5,858 |  |  |  | $ 4,879 |  |  |  | $ 5,858 | $ 4,879 | $ 6,001

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- Details
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