Unaudited Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

The following is a summary of our unaudited quarterly results of operations for 2014 and 2013:

	2014
	4th			3rd		2nd		1st
	(in millions of dollars, except share data)
Premium Income	$	1,967.9		$	1,947.2	$	1,943.6	$	1,938.5
Net Investment Income	629.4			606.4		629.1		612.5
Net Realized Investment Gain (Loss)	(17.3		)	1.2		25.9		6.3
Total Revenue	2,635.7			2,609.4		2,653.5		2,611.1
Income (Loss) Before Income Tax	(457.9		)	312.1		346.5		326.5
Net Income (Loss)	(279.1		)	221.1		242.5		228.9
Net Income (Loss) Per Common Share
Basic	(1.11		)	0.87		0.94		0.88
Assuming Dilution	(1.11		)	0.87		0.94		0.88

	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