Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment Information

Segment information is summarized in the following table: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Revenues:
Commercial lines insurance
Commercial casualty	$	268		$	265		$	804		$	785
Commercial property	225			217			674			646
Commercial auto	159			151			472			442
Workers' compensation	84			90			254			268
Other commercial	56			56			165			169
Commercial lines insurance premiums	792			779			2,369			2,310
Fee revenues	1			1			3			3
Total commercial lines insurance	793			780			2,372			2,313
Personal lines insurance
Personal auto	148			137			433			403
Homeowner	131			122			384			362
Other personal	35			34			104			99
Personal lines insurance premiums	314			293			921			864
Fee revenues	1			1			4			3
Total personal lines insurance	315			294			925			867
Excess and surplus lines insurance	53			48			153			136
Fee revenues	—			1			1			1
Total excess and surplus lines insurance	53			49			154			137
Life insurance premiums	56			58			173			175
Fee revenues	1			2			4			4
Total life insurance	57			60			177			179
Investments
Investment income, net of expenses	153			148			453			442
Realized investment gains and losses, net	7			56			156			161
Total investment revenue	160			204			609			603
Other
Cincinnati Re insurance premiums	32			13			80			33
Other	2			2			4			5
Total other revenues	34			15			84			38
Total revenues	$	1,412		$	1,402		$	4,321		$	4,137
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	39		$	72		$	61		$	148
Personal lines insurance	(9		)	(8		)	(48		)	—
Excess and surplus lines insurance	13			20			50			42
Life insurance	(4		)	(4		)	—			(4		)
Investments	136			181			539			536
Other	(46		)	(8		)	(69		)	(38		)
Total income before income taxes	$	129		$	253		$	533		$	684

Identifiable assets:	September 30, 2017		December 31, 2016
Property casualty insurance	$	2,997	$	2,967
Life insurance	1,424		1,366
Investments	16,693		15,569
Other	478		484
Total	$	21,592	$	20,386