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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 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
| Third Quarter
| 2020 |  | 2019 |  | 2020 |  | 2019
| ($ in millions, except per share amounts, shares in millions)
Net income | $ | 569 |  |  | $ | 657 |  |  | $ | 569 |  |  | $ | 657 |
Dividend equivalent payments | (2) |  |  | (1) |  |  | (1) |  |  | — |
Income available to common stockholders | $ | 567 |  |  | $ | 656 |  |  | $ | 568 |  |  | $ | 657 |
Weighted-average shares outstanding | 254.6 |  |  | 262.1 |  |  | 254.6 |  |  | 262.1 |
Dilutive effect of outstanding options and share-settled awards |  |  |  |  | 1.5 |  |  | 2.2 |
Adjusted weighted-average shares outstanding |  |  |  |  | 256.1 |  |  | 264.3 |
Earnings per share | $ | 2.23 |  |  | $ | 2.50 |  |  | $ | 2.22 |  |  | $ | 2.49 |
| Basic |  | Diluted
| First Nine Months
| 2020 |  | 2019 |  | 2020 |  | 2019
| ($ in millions, except per share amounts, shares in millions)
Net income | $ | 1,342 |  |  | $ | 2,056 |  |  | $ | 1,342 |  |  | $ | 2,056 |
Dividend equivalent payments | (3) |  |  | (4) |  |  | (2) |  |  | — |
Income available to common stockholders | $ | 1,339 |  |  | $ | 2,052 |  |  | $ | 1,340 |  |  | $ | 2,056 |
Weighted-average shares outstanding | 255.7 |  |  | 264.6 |  |  | 255.7 |  |  | 264.6 |
Dilutive effect of outstanding options and share-settled awards |  |  |  |  | 1.5 |  |  | 2.3 |
Adjusted weighted-average shares outstanding |  |  |  |  | 257.2 |  |  | 266.9 |
Earnings per share | $ | 5.24 |  |  | $ | 7.76 |  |  | $ | 5.21 |  |  | $ | 7.70 |

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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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