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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc.
 9 Months Ended
Sep. 30, 2025
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)2025202420252024
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - basic
540.2 573.7 550.8 582.5 
Common stock equivalents1.6 3.2 2.2 3.2 
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - diluted
541.8 576.9 553.0 585.7 
For the three and nine months ended September 30, 2025, restricted stock units for 1.3 million and 956 thousand shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive. For both the three and nine months ended September 30, 2024, restricted stock units excluded from the calculation of weighted-average outstanding shares - diluted were not significant.