Stockholders' Equity and Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2021

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 September 30				Nine Months Ended September 30
	2021		2020		2021		2020
	(in millions of dollars, except share data)
Numerator
Net Income	$	328.6	$	231.1	$	664.5	$	657.6
Denominator (000s)
Weighted Average Common Shares - Basic	204,645.8		203,761.3		204,429.6		203,564.7
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	496.5		117.8		623.3		71.4
Weighted Average Common Shares - Assuming Dilution	205,142.3		203,879.1		205,052.9		203,636.1
Net Income Per Common Share
Basic	$	1.61	$	1.13	$	3.25	$	3.23
Assuming Dilution	$	1.60	$	1.13	$	3.24	$	3.23