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Shares Used in Computing Net Income Per Share Attributable to Fiserv, Inc.
 3 Months Ended
Mar. 31, 2022
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
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 
For the three months ended March 31, 2022 and 2021, stock options for 2.0 million and 1.4 million shares, respectively, were excluded from the calculation of weighted-average outstanding shares - diluted because their impact was anti-dilutive.