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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc.
 6 Months Ended
Jun. 30, 2026
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)2026202520262025
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - basic
532.6 550.8 533.4 556.1 
Common stock equivalents1.1 1.9 1.1 2.6 
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - diluted
533.7 552.7 534.5 558.7 
For the three months ended June 30, 2026 and 2025, restricted stock units for 5.7 million and 1.2 million 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, 2026 and 2025, restricted stock units for 4.5 million and 913 thousand shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive.