Stockholders' Equity and Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2023

Stockholders' Equity and Earnings Per Common Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

Net income per common share is determined as follows:

	Three Months Ended March 31
	2023		2022
	(in millions of dollars, except share data)
Numerator
Net Income	$	358.3	$	240.4
Denominator (000s)
Weighted Average Common Shares - Basic	198,111.2		202,628.8
Dilution for Assumed Exercises of Nonvested Stock Awards	1,408.9		875.5
Weighted Average Common Shares - Assuming Dilution	199,520.1		203,504.3
Net Income Per Common Share
Basic	$	1.81	$	1.19
Assuming Dilution	$	1.80	$	1.18

Treasury Stock Transactions

Common stock repurchases, which are accounted for using the cost method and classified as treasury stock until otherwise retired, were as follows:

	Three Months Ended March 31
	2023		2022
	(in millions)
Shares Repurchased	1.3		1.3
Cost of Shares Repurchased1	$	53.6	$	37.5

1Includes a de minimis amount of commissions and $0.1 million of excise tax for the three months ended March 31, 2023. There were no commissions or excise taxes during the three months ended March 31, 2022.