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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table shows how we computed basic and diluted earnings per common share for the three months ended March 31, 2020 and 2019 (dollars and share data in millions):
| Three Months Ended March 31,
| 2020 |  | 2019
Net (loss) income | $ | (268 | ) |  | $ | 42 |
Weighted average basic shares | 277.2 |  |  | 305.3 |
Effect of dilutive securities | — |  |  | 1.6 |
Weighted average diluted shares | 277.2 |  |  | 306.9 |
(Loss) earnings per common share |  |  |
Basic | $ | (0.97 | ) |  | $ | 0.14 |
Diluted | $ | (0.97 | ) |  | $ | 0.14 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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