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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the calculation of basic and diluted earnings per share:
| Basic |  |  |  | Diluted |  |
| Second Quarter |  |  |  |  |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| ($ in millions, except per share amounts, shares in millions) |  |  |  |  |  |
Net income | $ | 392 |  |  | $ | 722 |  |  | $ | 392 |  |  | $ | 722 |
Dividend equivalent payments | — |  |  | (2) |  |  | — |  |  | — |
Income available to common stockholders | $ | 392 |  |  | $ | 720 |  |  | $ | 392 |  |  | $ | 722 |
Weighted-average shares outstanding | 255.4 |  |  | 264.8 |  |  | 255.4 |  |  | 264.8 |
Dilutive effect of outstanding options |  |  |  |  |  |  |
and share-settled awards |  |  |  |  | 1.3 |  |  | 2.3 |
Adjusted weighted-average shares outstanding |  |  |  |  | 256.7 |  |  | 267.1 |
Earnings per share | $ | 1.53 |  |  | $ | 2.72 |  |  | $ | 1.53 |  |  | $ | 2.70 |
| Basic |  |  |  | Diluted |  |
| First Six Months |  |  |  |  |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| ($ in millions, except per share amounts, shares in millions) |  |  |  |  |  |
Net income | $ | 773 |  |  | $ | 1,399 |  |  | $ | 773 |  |  | $ | 1,399 |
Dividend equivalent payments | (1) |  |  | (3) |  |  | (1) |  |  | — |
Income available to common stockholders | $ | 772 |  |  | $ | 1,396 |  |  | $ | 772 |  |  | $ | 1,399 |
Weighted-average shares outstanding | 256.3 |  |  | 265.9 |  |  | 256.3 |  |  | 265.9 |
Dilutive effect of outstanding options |  |  |  |  |  |  |
and share-settled awards |  |  |  |  | 1.4 |  |  | 2.4 |
Adjusted weighted-average shares outstanding |  |  |  |  | 257.7 |  |  | 268.3 |
Earnings per share | $ | 3.01 |  |  | $ | 5.25 |  |  | $ | 3.00 |  |  | $ | 5.21 |

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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=6371337&loc=d3e3550-109257 + Details
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