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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc. | 9 Months Ended
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Sep. 30, 2023
Earnings Per Share [Abstract] |
Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc. | Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc. The computation of shares used in calculating basic and diluted net income per share is as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2023 |  | 2022 |  | 2023 |  | 2022
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - basic | 606.2 |  |  | 639.6 |  |  | 616.2 |  |  | 645.2 |
Common stock equivalents | 4.1 |  |  | 5.4 |  |  | 4.1 |  |  | 5.8 |
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - diluted | 610.3 |  |  | 645.0 |  |  | 620.3 |  |  | 651.0 |
For the three months ended September 30, 2023 and 2022, stock options for 0.1 million and 1.6 million shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive. For the nine months ended September 30, 2023 and 2022, stock options for 0.9 million and 1.8 million shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive.

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