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Net Income Per Common Share Computations
 6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Net Income Per Common Share Computations NET INCOME PER COMMON SHARE COMPUTATIONS
The following is a reconciliation of the numerator and denominator of the net income per common share computations:
Three Months Ended June 30,Six Months Ended June 30,
(in millions, except per share data) 2023202220232022
Numerator for basic and diluted net income per common share:
Net income$143.0 $339.3 $298.7 $381.4 
Denominator for net income per common share:
Basic75.3 76.2 75.3 76.4 
Plus dilutive effect of stock awards1.6 1.0 1.2 1.0 
Diluted76.9 77.2 76.5 77.4 
Net income per common share data:
Basic net income$1.90 $4.45 $3.97 $4.99 
Diluted net income$1.86 $4.39 $3.90 $4.92 
All share and per-share amounts have been retroactively adjusted to reflect the effects of the Stock Split. Refer to Note 8, Shareholders' Equity for further information on the Stock Split.