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Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Denominators for The Computation of Basic and Diluted Earnings Per Share
The following table sets forth the calculation of basic and diluted net income per share:
Three Months Ended March 31,
 20232022
 (In millions, except net income per share)
Numerator:
Net income$321 $258 
Denominator:
Shares outstanding at the beginning of the period57.4 57.9 
Weighted-average number of shares issued:
Stock-based compensation0.1 0.1 
Denominator for basic net income per share57.5 58.0 
Effect of dilutive securities: (1)
Stock-based compensation0.5 0.7 
Denominator for diluted net income per share58.0 58.7 
Net income per share - Basic (2)
$5.58 $4.45 
Net income per share - Diluted (2)
$5.52 $4.39 
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(1)    The dilutive effect of all potentially dilutive common shares is calculated using the treasury stock method.
(2)    Source data for calculations in thousands.