Business Segments (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Significant components of the Company's continuing operations and selected balance sheet items

The Company's results of operations and selected balance sheet items by segment are presented in the following tables.

Three months ended September 30, 2016	Specialty			Commercial			International			Life & Group Non-Core			Corporate & Other Non-Core
(In millions)																Eliminations		Total
Operating revenues
Net earned premiums	$	704		$	719		$	210		$	134		$	—		$	—	$	1,767
Net investment income	140			175			13			192			4			—		524
Other revenues	93			7			—			(4		)	—			—		96
Total operating revenues	937			901			223			322			4			—		2,387
Claims, Benefits and Expenses
Net incurred claims and benefits	330			446			117			313			(11		)	—		1,195
Policyholders’ dividends	4			3			—			—			—			—		7
Amortization of deferred acquisition costs	151			118			45			—			—			—		314
Other insurance related expenses	77			151			33			37			(3		)	—		295
Other expenses	78			9			1			2			57			—		147
Total claims, benefits and expenses	640			727			196			352			43			—		1,958
Operating income (loss) before income tax	297			174			27			(30		)	(39		)	—		429
Income tax (expense) benefit on operating income (loss)	(102		)	(60		)	(7		)	36			15			—		(118		)
Net operating income (loss)	195			114			20			6			(24		)	—		311
Net realized investment gains (losses)	9			12			6			17			2			—		46
Income tax (expense) benefit on net realized investment gains (losses)	(3		)	(3		)	(1		)	(6		)	(1		)	—		(14		)
Net realized investment gains (losses), after tax	6			9			5			11			1			—		32
Net income (loss)	$	201		$	123		$	25		$	17		$	(23	)	$	—	$	343

Three months ended September 30, 2015	Specialty			Commercial			International			Life & Group Non-Core			Corporate & Other Non-Core
(In millions)																Eliminations			Total
Operating revenues
Net earned premiums	$	706		$	705		$	203		$	137		$	—		$	—		$	1,751
Net investment income	76			82			13			182			1			—			354
Other revenues	86			9			1			(1		)	4			(2		)	97
Total operating revenues	868			796			217			318			5			(2		)	2,202
Claims, Benefits and Expenses
Net incurred claims and benefits	307			427			106			361			(3		)	—			1,198
Policyholders’ dividends	1			1			—			—			—			—			2
Amortization of deferred acquisition costs	150			118			45			6			—			—			319
Other insurance related expenses	67			128			33			35			—			—			263
Other expenses	73			10			9			1			47			(2		)	138
Total claims, benefits and expenses	598			684			193			403			44			(2		)	1,920
Operating income (loss) before income tax	270			112			24			(85		)	(39		)	—			282
Income tax (expense) benefit on operating income (loss)	(91		)	(37		)	(15		)	55			16			—			(72		)
Net operating income (loss)	179			75			9			(30		)	(23		)	—			210
Net realized investment gains (losses)	(22		)	(29		)	(1		)	2			1			—			(49		)
Income tax (expense) benefit on net realized investment gains (losses)	8			8			1			—			—			—			17
Net realized investment gains (losses), after tax	(14		)	(21		)	—			2			1			—			(32		)
Net income (loss)	$	165		$	54		$	9		$	(28	)	$	(22	)	$	—		$	178

Nine months ended September 30, 2016	Specialty			Commercial			International			Life & Group Non-Core			Corporate & Other Non-Core
(In millions)																Eliminations			Total
Operating revenues
Net earned premiums	$	2,088		$	2,103		$	605		$	401		$	—		$	(1	)	$	5,196
Net investment income	380			465			38			567			11			—			1,461
Other revenues	269			21			1			(1		)	3			—			293
Total operating revenues	2,737			2,589			644			967			14			(1		)	6,950
Claims, Benefits and Expenses
Net incurred claims and benefits	1,097			1,357			395			976			109			—			3,934
Policyholders’ dividends	6			9			—			—			—			—			15
Amortization of deferred acquisition costs	443			351			132			—			—			—			926
Other insurance related expenses	225			422			98			101			(3		)	(1		)	842
Other expenses	232			25			17			7			158			—			439
Total claims, benefits and expenses	2,003			2,164			642			1,084			264			(1		)	6,156
Operating income (loss) before income tax	734			425			2			(117		)	(250		)	—			794
Income tax (expense) benefit on operating income (loss)	(248		)	(145		)	(3		)	117			88			—			(191		)
Net operating income (loss)	486			280			(1		)	—			(162		)	—			603
Net realized investment gains (losses)	2			2			14			12			(4		)	—			26
Income tax (expense) benefit on net realized investment gains (losses)	(1		)	—			(3		)	(9		)	2			—			(11		)
Net realized investment gains (losses), after tax	1			2			11			3			(2		)	—			15
Net income (loss)	$	487		$	282		$	10		$	3		$	(164	)	$	—		$	618

September 30, 2016
(In millions)
Reinsurance receivables	$	805	$	635	$	130	$	483	$	2,561	$	—	$	4,614
Insurance receivables	991		1,018		249		21		2		—		2,281
Deferred acquisition costs	313		223		83		—		—		—		619
Goodwill	117		—		29		—		—		—		146
Insurance reserves
Claim and claim adjustment expenses	6,278		8,879		1,408		3,407		2,700		—		22,672
Unearned premiums	1,922		1,373		432		135		—		—		3,862
Future policy benefits	—		—		—		11,219		—		—		11,219

Nine months ended September 30, 2015	Specialty			Commercial			International			Life & Group Non-Core			Corporate & Other Non-Core
(In millions)																Eliminations			Total
Operating revenues
Net earned premiums	$	2,075		$	2,086		$	601		$	412		$	—		$	(1	)	$	5,173
Net investment income	365			455			40			540			12			—			1,412
Other revenues	245			27			—			8			9			(3		)	286
Total operating revenues	2,685			2,568			641			960			21			(4		)	6,871
Claims, Benefits and Expenses
Net incurred claims and benefits	1,152			1,388			336			1,045			78			—			3,999
Policyholders’ dividends	3			6			—			—			—			—			9
Amortization of deferred acquisition costs	440			352			125			19			—			—			936
Other insurance related expenses	202			385			101			104			(1		)	(1		)	790
Other expenses	209			23			9			10			140			(3		)	388
Total claims, benefits and expenses	2,006			2,154			571			1,178			217			(4		)	6,122
Operating income (loss) before income tax	679			414			70			(218		)	(196		)	—			749
Income tax (expense) benefit on operating income (loss)	(228		)	(141		)	(30		)	147			70			—			(182		)
Net operating income (loss)	451			273			40			(71		)	(126		)	—			567
Net realized investment gains (losses)	(18		)	(23		)	1			(2		)	3			—			(39		)
Income tax (expense) benefit on net realized investment gains (losses)	7			7			—			8			(1		)	—			21
Net realized investment gains (losses), after tax	(11		)	(16		)	1			6			2			—			(18		)
Net income (loss)	$	440		$	257		$	41		$	(65	)	$	(124	)	$	—		$	549

December 31, 2015
(In millions)
Reinsurance receivables	$	724	$	639	$	144	$	497	$	2,487	$	—	$	4,491
Insurance receivables	890		993		233		11		2		—		2,129
Deferred acquisition costs	307		213		78		—		—		—		598
Goodwill	117		—		33		—		—		—		150
Insurance reserves
Claim and claim adjustment expenses	6,269		9,183		1,347		3,220		2,644		—		22,663
Unearned premiums	1,839		1,297		415		120		—		—		3,671
Future policy benefits	—		—		—		10,152		—		—		10,152

Revenues by line of business

The following table presents revenue by line of business for each reportable segment. Revenues are comprised of Operating revenues and Net realized investment gains and losses.

Periods ended September 30	Three Months					Nine Months
(In millions)	2016		2015			2016			2015
Specialty
Management & Professional Liability	$	677	$	605		$	1,954		$	1,976
Surety	139		132			399			377
Warranty & Alternative Risks	130		109			386			314
Specialty revenues	946		846			2,739			2,667
Commercial
Middle Market	463		386			1,298			1,207
Small Business	154		144			448			467
Other Commercial Insurance	296		237			845			871
Commercial revenues	913		767			2,591			2,545
International
Canada	51		52			152			161
CNA Europe	82		78			241			232
Hardy	96		86			265			249
International revenues	229		216			658			642
Life & Group Non-Core revenues	339		320			979			958
Corporate & Other Non-Core revenues	6		6			10			24
Eliminations	—		(2		)	(1		)	(4		)
Total revenues	$	2,433	$	2,153		$	6,976		$	6,832