Segment Information (tables)

3 Months Ended

Mar. 31, 2017

Segment Information disclosure

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

(for the three months ended March 31, in millions)	Business Insurance		Bond & Specialty  Insurance		Personal Insurance		Total Reportable Segments
2017
Premiums	$	3,429	$	555	$	2,199	$	6,183
Net investment income	453		61		96		610
Fee income	109		—		4		113
Other revenues	9		5		16		30
Total segment revenues (1)	$	4,000	$	621	$	2,315	$	6,936
Segment income (1)	$	442	$	145	$	89	$	676
2016
Premiums	$	3,414	$	552	$	2,015	$	5,981
Net investment income	399		60		85		544
Fee income	114		—		3		117
Other revenues	30		4		16		50
Total segment revenues (1)	$	3,957	$	616	$	2,119	$	6,692
Segment income (1)	$	447	$	160	$	152	$	759

(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 March 31,
(in millions)	2017			2016
Revenue reconciliation
Earned premiums:
Business Insurance:
Domestic:
Workers’ compensation	$	976		$	981
Commercial automobile	506			491
Commercial property	435			437
General liability	491			482
Commercial multi-peril	774			782
Other	7			5
Total Domestic	3,189			3,178
International	240			236
Total Business Insurance	3,429			3,414
Bond & Specialty Insurance:
Domestic:
Fidelity and surety	234			230
General liability	235			234
Other	45			44
Total Domestic	514			508
International	41			44
Total Bond & Specialty Insurance	555			552
Personal Insurance:
Domestic:
Automobile	1,094			936
Homeowners and Other	955			938
Total Domestic	2,049			1,874
International	150			141
Total Personal Insurance	2,199			2,015
Total earned premiums	6,183			5,981
Net investment income	610			544
Fee income	113			117
Other revenues	30			50
Total segment revenues	6,936			6,692
Other revenues	1			3
Net realized investment gains (losses)	5			(9		)
Total revenues	$	6,942		$	6,686
Income reconciliation, net of tax
Total segment income	$	676		$	759
Interest Expense and Other (1)	(62		)	(61		)
Core income	614			698
Net realized investment gains (losses)	3			(7		)
Net income	$	617		$	691

(1) The primary component of Interest Expense and Other for the three months ended March 31, 2017 and 2016 was after-tax interest expense of $58 million and $59 million, respectively.

Asset reconciliation [Table Text Block]

(in millions)	March 31,  2017		December 31,  2016
Asset reconciliation:
Business Insurance	$	76,835	$	75,730
Bond & Specialty Insurance	8,728		8,726
Personal Insurance	15,338		15,426
Total segment assets	100,901		99,882
Other assets (1)	345		363
Total consolidated assets	$	101,246	$	100,245

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