Stockholders' Equity and Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2022

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
	2022		2021
	(in millions of dollars, except share data)
Numerator
Net Income	$	253.5	$	153.0
Denominator (000s)
Weighted Average Common Shares - Basic	202,628.8		204,133.3
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	875.5		604.0
Weighted Average Common Shares - Assuming Dilution	203,504.3		204,737.3
Net Income Per Common Share
Basic	$	1.25	$	0.75
Assuming Dilution	$	1.25	$	0.75