Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Segment Information

egment information is summarized in the following table:

(Dollars in millions)	Years ended December 31,
	2016			2015			2014
Revenues:
Commercial lines insurance
Commercial casualty	$	1,050		$	1,010		$	938
Commercial property	867			815			728
Commercial auto	594			561			528
Workers' compensation	354			367			370
Other commercial	224			243			292
Commercial lines insurance premiums	3,089			2,996			2,856
Fee revenues	5			4			4
Total commercial lines insurance	3,094			3,000			2,860
Personal lines insurance
Personal auto	543			506			476
Homeowner	486			463			443
Other personal	132			128			122
Personal lines insurance premiums	1,161			1,097			1,041
Fee revenues	4			3			2
Total personal lines insurance	1,165			1,100			1,043
Excess and surplus lines insurance	183			168			148
Fee revenues	1			1			—
Total excess and surplus lines insurance	184			169			148
Life insurance premiums	228			209			198
Fee revenues	5			5			6
Total life insurance	233			214			204
Investments
Investment income, net of expenses	595			572			549
Realized investment gains, net	124			70			133
Total investment revenue	719			642			682
Other
Cincinnati Re insurance premiums	49			10			—
Other	5			7			8
Total other revenue	54			17			8
Total revenues	$	5,449		$	5,142		$	4,945
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	184		$	345		$	146
Personal lines insurance	(12		)	(12		)	10
Excess and surplus lines insurance	62			51			30
Life insurance	1			(2		)	(5		)
Investments	629			556			599
Other	(52		)	(57		)	(59		)
Total income before income taxes	$	812		$	881		$	721
	December 31,			December 31,
Identifiable assets:	2016			2015
Property casualty insurance	$	2,967		$	2,717
Life insurance	1,366			1,325
Investments	15,569			14,485
Other	484			361
Total	$	20,386		$	18,888