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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Schedule of Authorized Common Stock Repurchase Programs | Shares of Common Stock issued, in treasury and outstanding were:
|  | Shares Issued |  | Treasury Shares |  | Shares Outstanding
Balance at January 1, 2017 |  | 1,996,537,778 |  |  | (468,172,237 | ) |  | 1,528,365,541 |
Shares repurchased |  | — |  |  | (50,598,902 | ) |  | (50,598,902 | )
Exercise of stock options and issuance of other stock awards |  | — |  |  | 10,369,445 |  |  | 10,369,445 |
Balance at December 31, 2017 |  | 1,996,537,778 |  |  | (508,401,694 | ) |  | 1,488,136,084 |
Shares repurchased |  | — |  |  | (47,258,884 | ) |  | (47,258,884 | )
Exercise of stock options and issuance of other stock awards |  | — |  |  | 10,122,655 |  |  | 10,122,655 |
Balance at December 31, 2018 |  | 1,996,537,778 |  |  | (545,537,923 | ) |  | 1,450,999,855 |
Shares repurchased |  | — |  |  | (30,902,465 | ) |  | (30,902,465 | )
Exercise of stock options and issuance of other stock awards |  | — |  |  | 14,908,864 |  |  | 14,908,864 |
Balance at December 31, 2019 |  | 1,996,537,778 |  |  | (561,531,524 | ) |  | 1,435,006,254 |

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