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Earnings (Loss) per Share Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Earnings (Loss) Per Common Share |
| For the years ended December 31,
(In millions, except for per share data) | 2016 | 2015 | 2014
Earnings |  |  |
Income from continuing operations, net of tax | $ | 896 |  | $ | 1,673 |  | $ | 1,349 |
Income (loss) from discontinued operations, net of tax | — |  | 9 |  | (551 | )
Net income | $ | 896 |  | $ | 1,682 |  | $ | 798 |
Shares |  |  |  |  |  |
Weighted average common shares outstanding, basic | 387.7 |  | 415.5 |  | 441.8 |
Dilutive effect of warrants | 3.6 |  | 4.7 |  | 12.1 |
Dilutive effect of stock-based awards under compensation plans | 3.5 |  | 5.0 |  | 6.3 |
Weighted average shares outstanding and dilutive potential common shares [1] | 394.8 |  | 425.2 |  | 460.2 |
Net income (loss) per common share |  |  |
Basic |  |  |
Income from continuing operations, net of tax | $ | 2.31 |  | $ | 4.03 |  | $ | 3.05 |
Income (loss) from discontinued operations, net of tax | — |  | 0.02 |  | (1.24 | )
Net income per common share | $ | 2.31 |  | $ | 4.05 |  | $ | 1.81 |
Diluted |  |  |  |  |  |
Income from continuing operations, net of tax | $ | 2.27 |  | $ | 3.93 |  | $ | 2.93 |
Income (loss) from discontinued operations, net of tax | — |  | 0.03 |  | (1.20 | )
Net income per common share | $ | 2.27 |  | $ | 3.96 |  | $ | 1.73 |

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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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