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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted earnings per share on net income (in millions, except per share information):
|  | Three months ended June 30, |  | Six months ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Earnings: |  |  |  |  |  |  |  |
Net income |  | $ | 344 |  |  | $ | 158 |  |  | $ | 483 |  |  | $ | 70 |
Shares: |  |  |  |  |  |  |  |
Weighted average outstanding shares |  | 68 |  |  | 63 |  |  | 68 |  |  | 63 |
Equivalent shares from outstanding stock options |  | 1 |  |  | 1 |  |  | 1 |  |  | 1 |
Denominator for diluted calculation |  | 69 |  |  | 64 |  |  | 69 |  |  | 64 |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 5.06 |  |  | $ | 2.49 |  |  | $ | 7.11 |  |  | $ | 1.12 |
Diluted |  | $ | 5.02 |  |  | $ | 2.48 |  |  | $ | 7.06 |  |  | $ | 1.11 |

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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