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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc.
 6 Months Ended
Jun. 30, 2024
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
June 30,		Six Months Ended
June 30,
(In millions)2024202320242023
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - basic
582.7 615.4 586.8 621.2 
Common stock equivalents2.7 3.8 3.3 4.1 
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - diluted
585.4 619.2 590.1 625.3 
For the three months ended June 30, 2024 and 2023, stock options for 66 thousand and 911 thousand shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive. For the six months ended June 30, 2024 and 2023, stock options for 51 thousand and 984 thousand shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive.