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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc. (Tables)
3 Months Ended
Mar. 31, 2022
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
March 31,
(In millions)20222021
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - basic
650.8 668.6 
Common stock equivalents6.4 11.3 
Weighted-average common shares outstanding used for the calculation of net income attributable to Fiserv, Inc. per share - diluted
657.2 679.9