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Earnings Per Share | 3 Months Ended
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Mar. 31, 2024
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share ("EPS") There are no adjustments required to be made to net income for purposes of computing basic and diluted EPS. The dilutive effect of stock options and other stock-based awards is reflected in diluted EPS by application of the treasury stock method. The average number of common shares outstanding is reconciled to those used in the basic and diluted EPS computations as follows:
|  | Three Months Ended March 31 |  |
(Millions of shares) |  | 2024 |  | 2023 |  |  |  |
Basic |  | 336.9 |  |  | 337.5 |  |  |  |  |
Dilutive effect of stock options and restricted share unit awards |  | 1.4 |  |  | 1.1 |  |  |  |  |
Diluted |  | 338.3 |  |  | 338.6 |  |  |  |  |
Options outstanding that were not included in the computation of diluted EPS because their exercise price was greater than the average market price of the common shares were insignificant. The number of common shares outstanding as of March 31, 2024 and 2023 was 336.8 million and 337.4 million, respectively.

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