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Earnings Per Share | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following table sets forth the calculation of basic and diluted earnings per share:
| Basic |  | Diluted
| 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021
| ($ in millions except per share amounts, shares in millions)
Net income | $ | 1,827 |  |  | $ | 3,270 |  |  | $ | 3,005 |  |  | $ | 1,827 |  |  | $ | 3,270 |  |  | $ | 3,005 |
Dividend equivalent payments | (3) |  |  | (2) |  |  | (2) |  |  | (3) |  |  | (1) |  |  | — |
Income available to common stockholders | $ | 1,824 |  |  | $ | 3,268 |  |  | $ | 3,003 |  |  | $ | 1,824 |  |  | $ | 3,269 |  |  | $ | 3,005 |
Weighted-average shares outstanding | 226.9 |  |  | 234.8 |  |  | 246.9 |  |  | 226.9 |  |  | 234.8 |  |  | 246.9 |
Dilutive effect of outstanding options |  |  |  |  |  |  |  |  |  |  |
and share-settled awards |  |  |  |  |  |  | 0.5 |  |  | 0.8 |  |  | 1.2 |
Adjusted weighted-average shares outstanding |  |  |  |  |  |  | 227.4 |  |  | 235.6 |  |  | 248.1 |
Earnings per share | $ | 8.04 |  |  | $ | 13.92 |  |  | $ | 12.16 |  |  | $ | 8.02 |  |  | $ | 13.88 |  |  | $ | 12.11 |
In each year, dividend equivalent payments were made to certain holders of stock options and RSUs. For purposes of computing basic earnings per share, dividend equivalent payments made to holders of stock options and RSUs were deducted from net income to determine income available to common stockholders. For purposes of computing diluted earnings per share, we evaluate on a grant-by-grant basis those stock options and RSUs receiving dividend equivalent payments under the two-class and treasury stock methods to determine which method is more dilutive for each grant. For those grants for which the two-class method was more dilutive, net income was reduced by dividend equivalent payments to determine income available to common stockholders. The dilution calculations exclude options having exercise prices exceeding the average market price of Common Stock as follows: 0.1 million for the years ended December 31, 2023 and 2022, and none for the year ended December 31, 2021.

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