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Earnings Per Share
 9 Months Ended
Sep. 30, 2024
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The numerator for both basic and diluted earnings per share is Net income. The denominator for basic earnings per share is the weighted-average shares outstanding during the period.
A reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding is as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Basic weighted-average shares outstanding133.5134.1134.0134.8 
Effect of dilutive securities(1)
1.41.81.51.6 
Diluted weighted-average shares outstanding(2)
134.9135.9135.5136.4 
(1)The dilutive effect of outstanding stock options, restricted stock units, performance share units and Coworker Stock Purchase Plan units is reflected in the diluted weighted-average shares outstanding using the treasury stock method.
(2)There were fewer than 0.2 million potential common shares excluded from diluted weighted-average shares outstanding for both the three and nine months ended September 30, 2024 and 2023. Inclusion of these common shares in diluted weighted-average shares outstanding would have had an anti-dilutive effect.