Stockholders' Equity and Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2020

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 June 30				Six Months Ended June 30
	2020		2019		2020		2019
	(in millions of dollars, except share data)
Numerator
Net Income	$	265.5	$	281.2	$	426.5	$	562.1
Denominator (000s)
Weighted Average Common Shares - Basic	203,624.3		211,068.7		203,466.9		212,672.8
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	46.8		43.9		48.3		88.3
Weighted Average Common Shares - Assuming Dilution	203,671.1		211,112.6		203,515.2		212,761.1
Net Income Per Common Share
Basic	$	1.30	$	1.33	$	2.10	$	2.64
Assuming Dilution	$	1.30	$	1.33	$	2.10	$	2.64