Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Segment Information

Segment information is summarized in the following table:

(Dollars in millions)	Years ended December 31,
	2018			2017			2016
Revenues:
Commercial lines insurance
Commercial casualty	$	1,075		$	1,072		$	1,050
Commercial property	920			903			867
Commercial auto	664			634			594
Workers' compensation	324			335			354
Other commercial	235			221			224
Commercial lines insurance premiums	3,218			3,165			3,089
Fee revenues	5			5			5
Total commercial lines insurance	3,223			3,170			3,094
Personal lines insurance
Personal auto	614			582			543
Homeowner	563			518			486
Other personal	159			141			132
Personal lines insurance premiums	1,336			1,241			1,161
Fee revenues	5			5			4
Total personal lines insurance	1,341			1,246			1,165
Excess and surplus lines insurance	234			209			183
Fee revenues	1			1			1
Total excess and surplus lines insurance	235			210			184
Life insurance premiums	250			232			228
Fee revenues	4			5			5
Total life insurance	254			237			233
Investments
Investment income, net of expenses	619			609			595
Investment gains and losses, net	(402		)	148			124
Total investment revenue	217			757			719
Other
Cincinnati Re insurance premiums	132			107			49
Other	5			5			5
Total other revenue	137			112			54
Total revenues	$	5,407		$	5,732		$	5,449
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	151		$	119		$	184
Personal lines insurance	(20		)	(32		)	(12		)
Excess and surplus lines insurance	63			61			62
Life insurance	8			(1		)	1
Investments	121			664			629
Other	(72		)	(81		)	(52		)
Total income before income taxes	$	251		$	730		$	812
	December 31,			December 31,
Identifiable assets:	2018			2017
Property casualty insurance	$	3,285		$	2,863
Life insurance	1,424			1,409
Investments	16,741			17,112
Other	485			459
Total	$	21,935		$	21,843