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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2015
Authorized Common Stock Repurchase Programs | Shares of Common Stock issued, in treasury and outstanding were:
|  |  |  |  |  |  |  | Shares |
|  | Shares Issued |  |  | Treasury Shares |  |  | Outstanding |
Balance at January 1, 2013 |  |  | 1,996,537,778 |  |  |  | (218,541,936 | ) |  |  | 1,777,995,842 |
Shares repurchased |  |  | – |  |  |  | (82,799,448 | ) |  |  | (82,799,448 | )
Exercise of stock options and issuance of other stock awards |  |  | – |  |  |  | 10,200,200 |  |  |  | 10,200,200 |
Balance at December 31, 2013 |  |  | 1,996,537,778 |  |  |  | (291,141,184 | ) |  |  | 1,705,396,594 |
Shares repurchased |  |  | – |  |  |  | (51,931,864 | ) |  |  | (51,931,864 | )
Exercise of stock options and issuance of other stock awards |  |  | – |  |  |  | 10,176,269 |  |  |  | 10,176,269 |
Balance at December 31, 2014 |  |  | 1,996,537,778 |  |  |  | (332,896,779 | ) |  |  | 1,663,640,999 |
Shares repurchased |  |  | – |  |  |  | (91,875,878 | ) |  |  | (91,875,878 | )
Exercise of stock options and issuance of other stock awards |  |  | – |  |  |  | 8,268,033 |  |  |  | 8,268,033 |
Balance at December 31, 2015 |  |  | 1,996,537,778 |  |  |  | (416,504,624 | ) |  |  | 1,580,033,154 |

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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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