Unaudited Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

The following is a summary of our unaudited quarterly results of operations for 2013 and 2012:

	2013
	4th		3rd			2nd		1st
	(in millions of dollars, except share data)
Premium Income	$	1,890.7	$	1,897.3		$	1,905.8	$	1,930.9
Net Investment Income	629.4		615.5			626.1		621.1
Net Realized Investment Gain (Loss)	9.3		(26.1		)	13.3		10.3
Total Revenue	2,586.2		2,540.9			2,601.9		2,624.8
Income Before Income Tax	305.8		284.1			311.5		303.8
Net Income	221.2		205.7			218.6		212.6
Net Income Per Common Share
Basic	0.85		0.78			0.82		0.79
Assuming Dilution	0.84		0.78			0.82		0.79

	2012
	4th		3rd		2nd			1st
	(in millions of dollars, except share data)
Premium Income	$	1,937.2	$	1,929.4	$	1,927.6		$	1,921.9
Net Investment Income	643.0		619.2		633.5			619.5
Net Realized Investment Gain (Loss)	24.6		21.3		(2.1		)	12.4
Total Revenue	2,658.2		2,628.0		2,617.9			2,611.3
Income Before Income Tax	322.7		320.4		296.4			310.0
Net Income	233.9		230.2		216.4			213.9
Net Income Per Common Share
Basic	0.86		0.83		0.76			0.74
Assuming Dilution	0.85		0.83		0.76			0.73