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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
(dollars in millions, except per share amounts; shares in millions) | 2017 |  | 2016 |  | 2015
Net income attributable to common shareowners: |  |  |  |  |
Net income from continuing operations | $ | 4,552 |  |  | $ | 5,065 |  |  | $ | 3,996 |
Net (loss) income from discontinued operations | — |  |  | (10 | ) |  | 3,612 |
Net income attributable to common shareowners | $ | 4,552 |  |  | $ | 5,055 |  |  | $ | 7,608 |
Basic weighted average number of shares outstanding | 790.0 |  |  | 818.2 |  |  | 872.7 |
Stock awards | 9.1 |  |  | 7.9 |  |  | 10.5 |
Diluted weighted average number of shares outstanding | 799.1 |  |  | 826.1 |  |  | 883.2 |
Earnings Per Share of Common Stock—Basic: |  |  |  |  |
Net income from continuing operations | $ | 5.76 |  |  | $ | 6.19 |  |  | $ | 4.58 |
Net (loss) income from discontinued operations | — |  |  | (0.01 | ) |  | 4.14 |
Net income attributable to common shareowners | 5.76 |  |  | 6.18 |  |  | 8.72 |
Earnings Per Share of Common Stock—Diluted: |  |  |  |  |
Net income from continuing operations | $ | 5.70 |  |  | $ | 6.13 |  |  | $ | 4.53 |
Net (loss) income from discontinued operations | — |  |  | (0.01 | ) |  | 4.09 |
Net income attributable to common shareowners | 5.70 |  |  | 6.12 |  |  | 8.61 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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