Segment Information (tables)

9 Months Ended

Sep. 30, 2017

Segment Information disclosure

Company's revenues and income by segment [Table Text Block]

(for the three months ended September 30, in millions)	Business Insurance		Bond & Specialty Insurance		Personal Insurance		Total Reportable Segments
2017
Premiums	$	3,576	$	591	$	2,356	$	6,523
Net investment income	437		57		94		588
Fee income	108		—		5		113
Other revenues	19		5		14		38
Total segment revenues (1)	$	4,140	$	653	$	2,469	$	7,262
Segment income (1)	$	105	$	136	$	77	$	318
2016
Premiums	$	3,497	$	573	$	2,139	$	6,209
Net investment income	431		59		92		582
Fee income	111		—		5		116
Other revenues	7		5		16		28
Total segment revenues (1)	$	4,046	$	637	$	2,252	$	6,935
Segment income (1)	$	433	$	165	$	163	$	761

(1) Segment revenues for reportable business segments exclude net realized investment gains (losses). Segment income for reportable business segments equals net income excluding the after-tax impact of net realized investment gains (losses).

(for the nine months ended September 30, in millions)	Business Insurance		Bond & Specialty Insurance		Personal Insurance		Total Reportable Segments
2017
Premiums	$	10,509	$	1,721	$	6,827	$	19,057
Net investment income	1,337		174		285		1,796
Fee income	329		—		13		342
Other revenues	43		16		45		104
Total segment revenues (1)	$	12,218	$	1,911	$	7,170	$	21,299
Segment income (1)	$	976	$	444	$	178	$	1,598
2016
Premiums	$	10,350	$	1,684	$	6,223	$	18,257
Net investment income	1,234		177		264		1,675
Fee income	340		—		12		352
Other revenues	45		14		47		106
Total segment revenues (1)	$	11,969	$	1,875	$	6,546	$	20,390
Segment income (1)	$	1,281	$	540	$	410	$	2,231

(1) Segment revenues for reportable business segments exclude net realized investment gains (losses). Segment income for reportable business segments equals net income excluding the after-tax impact of net realized investment gains (losses).

Business segment reconciliations of revenue and income, net of tax [Table Text Block]

	Three Months Ended September  30,						Nine Months Ended September 30,
(in millions)	2017			2016			2017			2016
Revenue reconciliation
Earned premiums
Business Insurance:
Domestic:
Workers’ compensation	$	998		$	1,003		$	2,973		$	2,971
Commercial automobile	544			503			1,571			1,497
Commercial property	448			441			1,326			1,320
General liability	523			504			1,512			1,471
Commercial multi-peril	806			788			2,377			2,356
Other	7			9			21			23
Total Domestic	3,326			3,248			9,780			9,638
International	250			249			729			712
Total Business Insurance	3,576			3,497			10,509			10,350
Bond & Specialty Insurance:
Domestic:
Fidelity and surety	249			245			728			714
General liability	243			239			717			708
Other	48			45			139			133
Total Domestic	540			529			1,584			1,555
International	51			44			137			129
Total Bond & Specialty Insurance	591			573			1,721			1,684
Personal Insurance:
Domestic:
Automobile	1,192			1,026			3,431			2,936
Homeowners and Other	999			962			2,931			2,844
Total Domestic	2,191			1,988			6,362			5,780
International	165			151			465			443
Total Personal Insurance	2,356			2,139			6,827			6,223
Total earned premiums	6,523			6,209			19,057			18,257
Net investment income	588			582			1,796			1,675
Fee income	113			116			342			352
Other revenues	38			28			104			106
Total segment revenues	7,262			6,935			21,299			20,390
Other revenues	2			3			6			9
Net realized investment gains	61			23			146			33
Total revenues	$	7,325		$	6,961		$	21,451		$	20,432
Income reconciliation, net of tax
Total segment income	$	318		$	761		$	1,598		$	2,231
Interest Expense and Other (1)	(65		)	(60		)	(188		)	(183		)
Core income	253			701			1,410			2,048
Net realized investment gains	40			15			95			23
Net income	$	293		$	716		$	1,505		$	2,071

(1) The primary component of Interest Expense and Other was after-tax interest expense of $61 million and $57 million in the three months ended September 30, 2017 and 2016, respectively, and $179 million and $177 million in the nine months ended September 30, 2017 and 2016, respectively.

Asset reconciliation [Table Text Block]

(in millions)	September 30, 2017		December 31, 2016
Asset reconciliation
Business Insurance	$	78,985	$	75,730
Bond & Specialty Insurance	9,005		8,726
Personal Insurance	15,962		15,426
Total segment assets	103,952		99,882
Other assets (1)	359		363
Total consolidated assets	$	104,311	$	100,245

(1) The primary components of other assets at September 30, 2017 and December 31, 2016 were other intangible assets and deferred taxes.