Segment Information (tables)

6 Months Ended

Jun. 30, 2016

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

(for the three months ended June 30, in millions)	Business and International Insurance		Bond & Specialty Insurance		Personal Insurance		Total Reportable Segments
2016
Premiums	$	3,631	$	518	$	1,918	$	6,067
Net investment income	420		51		78		549
Fee income	115		—		4		119
Other revenues	8		6		14		28
Total operating revenues (1)	$	4,174	$	575	$	2,014	$	6,763
Operating income (1)	$	393	$	202	$	116	$	711

2015
Premiums	$	3,609	$	524	$	1,798	$	5,931
Net investment income	487		57		88		632
Fee income	111		—		4		115
Other revenues	5		5		12		22
Total operating revenues (1)	$	4,212	$	586	$	1,902	$	6,700
Operating income (1)	$	543	$	151	$	174	$	868

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

(for the six months ended June 30, in millions)	Business and International Insurance		Bond & Specialty Insurance		Personal Insurance		Total Reportable Segments
2016
Premiums	$	7,230	$	1,026	$	3,792	$	12,048
Net investment income	835		103		155		1,093
Fee income	229		—		7		236
Other revenues	41		9		28		78
Total operating revenues (1)	$	8,335	$	1,138	$	3,982	$	13,455
Operating income (1)	$	869	$	346	$	255	$	1,470

2015
Premiums	$	7,229	$	1,028	$	3,562	$	11,819
Net investment income	941		113		170		1,224
Fee income	222		—		7		229
Other revenues	13		10		24		47
Total operating revenues (1)	$	8,405	$	1,151	$	3,763	$	13,319
Operating income (1)	$	1,058	$	275	$	426	$	1,759

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

	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2016			2015			2016			2015
Revenue reconciliation
Earned premiums
Business and International Insurance:
Domestic:
Workers’ compensation	$	987		$	957		$	1,968		$	1,919
Commercial automobile	503			477			994			945
Commercial property	442			440			879			880
General liability	485			469			967			937
Commercial multi-peril	786			779			1,568			1,553
Other	9			10			14			20
Total Domestic	3,212			3,132			6,390			6,254
International	419			477			840			975
Total Business and International Insurance	3,631			3,609			7,230			7,229

Bond & Specialty Insurance:
Fidelity and surety	239			240			469			465
General liability	235			240			469			476
Other	44			44			88			87
Total Bond & Specialty Insurance	518			524			1,026			1,028

Personal Insurance:
Automobile	974			863			1,910			1,699
Homeowners and Other	944			935			1,882			1,863
Total Personal Insurance	1,918			1,798			3,792			3,562
Total earned premiums	6,067			5,931			12,048			11,819
Net investment income	549			632			1,093			1,224
Fee income	119			115			236			229
Other revenues	28			22			78			47
Total operating revenues for reportable segments	6,763			6,700			13,455			13,319
Other revenues	3			—			6			—
Net realized investment gains	19			10			10			20
Total consolidated revenues	$	6,785		$	6,710		$	13,471		$	13,339

Income reconciliation, net of tax
Total operating income for reportable segments	$	711		$	868		$	1,470		$	1,759
Interest Expense and Other (1)	(62		)	(62		)	(123		)	(126		)
Total operating income	649			806			1,347			1,633
Net realized investment gains	15			6			8			12
Total consolidated net income	$	664		$	812		$	1,355		$	1,645

(1) The primary component of Interest Expense and Other was after-tax interest expense of $60 million in each of the three months ended June 30, 2016 and 2015, and $120 million in each of the six months ended June 30, 2016 and 2015.

Asset reconciliation [Table Text Block]

(in millions)	June 30, 2016		December 31, 2015
Asset reconciliation:
Business and International Insurance	$	81,214	$	79,692
Bond & Specialty Insurance	7,745		7,360
Personal Insurance	13,109		12,748
Total assets for reportable segments	102,068		99,800
Other assets (1)	378		384
Total consolidated assets	$	102,446	$	100,184

(1) The primary component of other assets at June 30, 2016 was other intangible assets and the primary components at December 31, 2015 were other intangible assets and deferred taxes.