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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc. (Tables)
9 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Computation of shares used in calculating basic and diluted net income per common share
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)2023202220232022
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 equivalents4.1 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