Segment Information (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Segment Information

Segment information is summarized in the following table:

(Dollars in millions)	Years ended December 31,
	2020		2019		2018
Revenues:
Commercial lines insurance
Commercial casualty	$	1,165	$	1,102	$	1,075
Commercial property	1,010		958		920
Commercial auto	755		707		664
Workers' compensation	271		300		324
Other commercial	275		252		235
Commercial lines insurance premiums	3,476		3,319		3,218
Fee revenues	3		5		5
Total commercial lines insurance	3,479		3,324		3,223
Personal lines insurance
Personal auto	615		621		614
Homeowner	658		607		563
Other personal	190		176		159
Personal lines insurance premiums	1,463		1,404		1,336
Fee revenues	4		4		5
Total personal lines insurance	1,467		1,408		1,341
Excess and surplus lines insurance	325		278		234
Fee revenues	2		2		1
Total excess and surplus lines insurance	327		280		235
Life insurance premiums	289		270		250
Fee revenues	2		4		4
Total life insurance	291		274		254
Investments
Investment income, net of expenses	670		646		619
Investment gains and losses, net	865		1,650		(402)
Total investment revenue	1,535		2,296		217
Other
Premiums	427		333		132
Other	10		9		5
Total other revenue	437		342		137
Total revenues	$	7,536	$	7,924	$	5,407
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	64	$	241	$	151
Personal lines insurance	47		8		(20)
Excess and surplus lines insurance	34		53		63
Life insurance	11		1		8
Investments	1,433		2,197		121
Other	(90)		(28)		(72)
Total income before income taxes	$	1,499	$	2,472	$	251
	December 31,		December 31,
Identifiable assets:	2020		2019
Property casualty insurance	$	3,838	$	3,437
Life insurance	1,661		1,516
Investments	21,332		19,583
Other	711		872
Total	$	27,542	$	25,408