Stockholders' Equity and Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share, Basic and Diluted [Abstract]

Net Income Per Common Share

Net income per common share is determined as follows:

	Three Months Ended June 30				Six Months Ended June 30
	2012		2011		2012		2011
	(in millions of dollars, except share data)
Numerator
Net Income	$	216.4	$	227.6	$	430.3	$	451.2
Denominator (000s)
Weighted Average Common Shares - Basic	283,316.6		306,316.2		286,874.5		309,513.0
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	424.0		1,094.8		639.3		1,342.4
Weighted Average Common Shares - Assuming Dilution	283,740.6		307,411.0		287,513.8		310,855.4
Net Income Per Common Share
Basic	$	0.76	$	0.74	$	1.50	$	1.46
Assuming Dilution	$	0.76	$	0.74	$	1.50	$	1.45