XML 64 R51.htm IDEA: XBRL DOCUMENT
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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Stockholders Equity Note [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | $ 405 |
Net income | $ 1,384 | $ 1,269 | 2,542 | $ 2,400
Balance at end of period | $ 1,244 |  | $ 1,244 |
Class A common stock |  |  |  |
Stockholders Equity Note [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 180 | 194
Common stock purchases |  |  | (2) | (3)
Stock award plans |  |  | 4 | 4
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures |  |  | $ 0 | $ 0
Common stock issuances |  |  | 1 | 2
Conversions of Class A to Class B common stock |  |  | (5) | (8)
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  | $ 0 | $ 0
Balance at end of period | 178 | 189 | 178 | 189
Balance at beginning of period |  |  | $ 2 | $ 2
Common stock issuances |  |  | 0 | 0
Common stock purchases |  |  | 0 | 0
Balance at end of period | $ 2 | $ 2 | $ 2 | $ 2
Class B common stock |  |  |  |
Stockholders Equity Note [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 689 | 693
Common stock purchases |  |  | (6) | (10)
Conversions of Class A to Class B common stock |  |  | (5) | (8)
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  | $ 0 | $ 0
Balance at end of period | 688 | 691 | 688 | 691
Balance at beginning of period |  |  | $ 7 | $ 7
Common stock purchases |  |  | 0 | 0
Balance at end of period | $ 7 | $ 7 | 7 | 7
Additional Paid-in Capital |  |  |  |
Stockholders Equity Note [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 0 | 0
Stock award plans |  |  | 157 | 289
Common stock issuances |  |  | 203 | 168
Option premiums received (paid) |  |  | 52 | 104
Common stock purchases |  |  | (412) | (561)
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
Net income |  |  | 2,542 | 2,400
Dividends ($1.66 and $1.56 per share) |  |  | (1,495) | (1,409)
Common stock purchases |  |  | (489) | (769)
Balance at end of period | $ 5,437 | $ 6,223 | $ 5,437 | $ 6,223
Common stock, cash paid for dividends, per share |  |  | $ 1.66 | $ 1.56
Options Held [Member] |  |  |  |
Stockholders Equity Note [Roll Forward] |  |  |  |
Option premiums received (paid) |  |  | $ 52 | $ 104

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