10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

[x] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2016

OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____ to _____

Commission File Number 1-5823

CNA FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 36-6169860 (I.R.S. Employer Identification No.)

333 S. Wabash Chicago, Illinois (Address of principal executive offices) 60604 (Zip Code)

(312) 822-5000

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes [x] No [ ]

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes [x] No [ ]

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer [x] Accelerated filer [ ] Non-accelerated filer [ ](Do not check if a smaller reporting company) Smaller reporting company [ ]

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes [ ] No [x]

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

Class	Outstanding at October 27, 2016
Common Stock, Par value $2.50	270,489,350

Item Number		Page Number
	PART I. Financial Information
1.	Condensed Consolidated Financial Statements:
	Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2016 and 2015 (Unaudited)	3
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2016 and 2015 (Unaudited)	4
	Condensed Consolidated Balance Sheets as of September 30, 2016 (Unaudited) and December 31, 2015	5
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2016 and 2015 (Unaudited)	6
	Condensed Consolidated Statements of Stockholders' Equity for the nine months ended September 30, 2016 and 2015 (Unaudited)	8
	Notes to Condensed Consolidated Financial Statements (Unaudited)	9
2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	46
3.	Quantitative and Qualitative Disclosures About Market Risk	67
4.	Controls and Procedures	67
	PART II. Other Information
1.	Legal Proceedings	68
6.	Exhibits	68

2

PART I. Financial Information

Item 1. Condensed Consolidated Financial Statements

CNA Financial Corporation

Condensed Consolidated Statements of Operations (Unaudited)

Periods ended September 30	Three Months						Nine Months
(In millions, except per share data)	2016			2015			2016			2015
Revenues
Net earned premiums	$	1,767		$	1,751		$	5,196		$	5,173
Net investment income	524			354			1,461			1,412
Net realized investment gains (losses)
Other-than-temporary impairment losses	(18		)	(56		)	(56		)	(99		)
Other net realized investment gains	64			7			82			60
Net realized investment gains (losses)	46			(49		)	26			(39		)
Other revenues	96			97			293			286
Total revenues	2,433			2,153			6,976			6,832
Claims, Benefits and Expenses
Insurance claims and policyholders’ benefits	1,202			1,200			3,949			4,008
Amortization of deferred acquisition costs	314			319			926			936
Other operating expenses	403			362			1,162			1,061
Interest	39			39			119			117
Total claims, benefits and expenses	1,958			1,920			6,156			6,122
Income before income tax	475			233			820			710
Income tax expense	(132		)	(55		)	(202		)	(161		)
Net income	$	343		$	178		$	618		$	549
Basic earnings per share	$	1.27		$	0.66		$	2.28		$	2.03
Diluted earnings per share	$	1.26		$	0.66		$	2.28		$	2.03
Dividends declared per share	$	0.25		$	0.25		$	2.75		$	2.75
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	270.5			270.3			270.4			270.2
Diluted	271.2			270.8			271.0			270.7

The accompanying Notes are an integral part of these Condensed Consolidated Financial Statements (Unaudited).

3

CNA Financial Corporation

Condensed Consolidated Statements of Comprehensive Income (Unaudited)

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Comprehensive Income
Net income	$	343		$	178		$	618		$	549
Other Comprehensive Income (Loss), Net of Tax
Changes in:
Net unrealized gains on investments with other-than-temporary impairments	3			2			7			(3		)
Net unrealized gains on other investments	42			(36		)	586			(289		)
Net unrealized gains on investments	45			(34		)	593			(292		)
Foreign currency translation adjustment	(24		)	(53		)	(58		)	(100		)
Pension and postretirement benefits	6			4			17			52
Other comprehensive income (loss), net of tax	27			(83		)	552			(340		)
Total comprehensive income	$	370		$	95		$	1,170		$	209

The accompanying Notes are an integral part of these Condensed Consolidated Financial Statements (Unaudited).

4

CNA Financial Corporation

Condensed Consolidated Balance Sheets

(In millions, except share data)	September 30, 2016 (Unaudited)			December 31, 2015
Assets
Investments:
Fixed maturity securities at fair value (amortized cost of $38,240and $37,253)	$	42,321		$	39,572
Equity securities at fair value (cost of $108 and $191)	116			197
Limited partnership investments	2,456			2,548
Other invested assets	35			44
Mortgage loans	629			678
Short term investments	1,423			1,660
Total investments	46,980			44,699
Cash	290			387
Reinsurance receivables (less allowance for uncollectible receivables of $37 and $38)	4,577			4,453
Insurance receivables (less allowance for uncollectible receivables of $46 and $51)	2,235			2,078
Accrued investment income	434			404
Deferred acquisition costs	619			598
Deferred income taxes	221			638
Property and equipment at cost (less accumulated depreciation of $236 and $382)	287			343
Goodwill	146			150
Other assets	1,070			1,295
Total assets	$	56,859		$	55,045
Liabilities
Insurance reserves:
Claim and claim adjustment expenses	$	22,672		$	22,663
Unearned premiums	3,862			3,671
Future policy benefits	11,219			10,152
Short term debt	—			350
Long term debt	2,709			2,210
Other liabilities (includes $87and $82 due to Loews Corporation)	4,202			4,243
Total liabilities	44,664			43,289
Commitments and contingencies (Notes C, F and H)
Stockholders' Equity
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 270,489,350 and 270,274,361 shares outstanding)	683			683
Additional paid-in capital	2,163			2,153
Retained earnings	9,185			9,313
Accumulated other comprehensive income (loss)	237			(315		)
Treasury stock (2,550,893 and 2,765,882 shares), at cost	(73		)	(78		)
Total stockholders’ equity	12,195			11,756
Total liabilities and stockholders' equity	$	56,859		$	55,045

The accompanying Notes are an integral part of these Condensed Consolidated Financial Statements (Unaudited).

5

CNA Financial Corporation

Condensed Consolidated Statements of Cash Flows (Unaudited)

Nine months ended September 30
(In millions)	2016			2015
Cash Flows from Operating Activities
Net income	$	618		$	549
Adjustments to reconcile net income to net cash flows provided by operating activities:
Deferred income tax expense	112			27
Trading portfolio activity	—			17
Net realized investment (gains) losses	(26		)	39
Equity method investees	265			127
Net amortization of investments	(17		)	(17		)
Depreciation and amortization	57			62
Changes in:
Receivables, net	(311		)	70
Accrued investment income	(30		)	(34		)
Deferred acquisition costs	(24		)	11
Insurance reserves	464			195
Other assets	(96		)	(61		)
Other liabilities	61			(32		)
Other, net	47			92
Total adjustments	502			496
Net cash flows provided by operating activities	1,120			1,045
Cash Flows from Investing Activities
Dispositions:
Fixed maturity securities - sales	4,234			3,590
Fixed maturity securities - maturities, calls and redemptions	2,263			3,101
Equity securities	79			43
Limited partnerships	200			156
Mortgage loans	137			22
Purchases:
Fixed maturity securities	(7,472		)	(7,055		)
Equity securities	(1		)	(60		)
Limited partnerships	(222		)	(120		)
Mortgage loans	(88		)	(81		)
Change in other investments	10			5
Change in short term investments	241			222
Purchases of property and equipment	(94		)	(84		)
Disposals of property and equipment	107			—
Other, net	2			7
Net cash flows (used) by investing activities	$	(604	)	$	(254	)

The accompanying Notes are an integral part of these Condensed Consolidated Financial Statements (Unaudited).

6

Nine months ended September 30
(In millions)	2016			2015
Cash Flows from Financing Activities
Dividends paid to common stockholders	$	(746	)	$	(744	)
Proceeds from the issuance of debt	498			—
Repayment of debt	(358		)	—
Other, net	1			5
Net cash flows (used) by financing activities	(605		)	(739		)
Effect of foreign exchange rate changes on cash	(8		)	(6		)
Net change in cash	(97		)	46
Cash, beginning of year	387			190
Cash, end of period	$	290		$	236

The accompanying Notes are an integral part of these Condensed Consolidated Financial Statements (Unaudited).

7

CNA Financial Corporation    

Condensed Consolidated Statements of Stockholders' Equity (Unaudited)

Nine months ended September 30
(In millions)	2016			2015
Common Stock
Balance, beginning of year	$	683		$	683
Balance, end of period	683			683
Additional Paid-in Capital
Balance, beginning of year	2,153			2,151
Stock-based compensation	10			(1		)
Balance, end of period	2,163			2,150
Retained Earnings
Balance, beginning of year	9,313			9,645
Dividends paid to common stockholders	(746		)	(744		)
Net income	618			549
Balance, end of period	9,185			9,450
Accumulated Other Comprehensive Income (Loss)
Balance, beginning of year	(315		)	400
Other comprehensive income (loss)	552			(340		)
Balance, end of period	237			60
Treasury Stock
Balance, beginning of year	(78		)	(84		)
Stock-based compensation	5			6
Balance, end of period	(73		)	(78		)
Notes Receivable for the Issuance of Common Stock
Balance, beginning of year	—			(1		)
Decrease in notes receivable for common stock	—			1
Balance, end of period	—			—
Total stockholders' equity	$	12,195		$	12,265

The accompanying Notes are an integral part of these Condensed Consolidated Financial Statements (Unaudited).

8

CNA Financial Corporation

Notes to Condensed Consolidated Financial Statements (Unaudited)

Note A. General

Basis of Presentation

The Condensed Consolidated Financial Statements include the accounts of CNA Financial Corporation (CNAF) and its subsidiaries. Collectively, CNAF and its subsidiaries are referred to as CNA or the Company. Loews Corporation (Loews) owned approximately 90% of the outstanding common stock of CNAF as of September 30, 2016.

The accompanying Condensed Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Intercompany amounts have been eliminated. Certain financial information that is normally included in annual financial statements, including certain financial statement notes, prepared in accordance with GAAP, is not required for interim reporting purposes and has been condensed or omitted. These statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in CNAF's Annual Report on Form 10-K filed with the Securities and Exchange Commission for the year ended December 31, 2015, including the summary of significant accounting policies in Note A. The preparation of Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Condensed Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates.

The interim financial data as of September 30, 2016 and for the three and nine months endedSeptember 30, 2016 and 2015 is unaudited. However, in the opinion of management, the interim data includes all adjustments, including normal recurring adjustments, necessary for a fair statement of the Company's results for the interim periods. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year.

Recently Adopted Accounting Standards Updates (ASU)

In April 2015, the Financial Accounting Standards Board (FASB) issued ASU No. 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The updated accounting guidance requires debt issuance costs to be presented as a deduction from the corresponding debt liability instead of the historical presentation as an unamortized debt issuance asset. As of January 1, 2016, the Company adopted the updated accounting guidance retrospectively. The Company adjusted its previously reported financial information included herein to reflect the change in accounting guidance for debt issuance costs. The impacts of adopting the new accounting standard on the Company’s Consolidated Balance Sheet as of December 31, 2015, were a decrease in Other assets and a decrease in Long term debt of $2 million.

In May 2015, the FASB issued ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). The updated accounting guidance removes the requirement to categorize assets measured at fair value utilizing the net asset value per share (or equivalent) practical expedient within the fair value hierarchy. As of January 1, 2016, the Company adopted the updated accounting guidance retrospectively. The Company adjusted its previously reported financial information included herein to reflect the change in accounting guidance for assets measured using the net asset value. The impact of adopting the new accounting standard resulted in excluding overseas deposits of $30 million and $27 million from the fair value level disclosure as of September 30, 2016 and December 31, 2015.

9

Accounting Standards Pending Adoption

In May 2015, the FASB issued ASU No. 2015-09, Financial Services-Insurance (Topic 944): Disclosures about

Short-Duration Contracts. The updated accounting guidance requires enhanced disclosures to provide additional information about insurance liabilities for short-duration contracts. The guidance is effective for annual periods beginning after December 15, 2015, and interim periods within the annual periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on the Company's financial statement disclosures, but expects to provide additional incurred and paid claims development information by accident year, quantitative information about claim frequency and the history of claims duration for significant lines of business within the Company’s annual financial statements.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The updated accounting guidance requires changes to the reporting model for financial instruments. The guidance is effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on the Company's financial statements, and expects the primary change for the Company to be the requirement for equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842): Accounting for Leases. The updated accounting guidance requires lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by all leases, including those historically accounted for as operating leases. The guidance is effective for interim and annual periods beginning after December 15, 2018. The Company is currently evaluating the effect the updated guidance will have on the Company's financial statements. It is expected that assets and liabilities will increase based on the present value of remaining lease payments for leases in place at the adoption date, however, this is not expected to be material to the Company's results of operations or financial position.

In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The updated accounting guidance simplifies the accounting for share-based payment award transactions including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The guidance is effective for annual and interim periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on the Company’s financial statements, but anticipates the primary change to be the recognition of excess tax benefits or deficiencies on vesting or settlement of awards as an income tax benefit or expense, respectively, within net income and the related cash flows classified within operating activities.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The updated accounting guidance requires changes to the recognition of credit losses on financial instruments not accounted for at fair value through net income. The guidance is effective for interim and annual periods beginning after December 15, 2019. The Company is currently evaluating the effect the guidance will have on the Company's financial statements, but expects the primary changes to be the use of the expected credit loss model for its mortgage loan portfolio and reinsurance receivables and the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses if the estimate of credit losses declines.

10

Note B. Earnings Per Share

Earnings per share is based on the weighted average number of outstanding common shares. Basic earnings (loss) per share excludes the effect of dilutive securities and is computed by dividing Net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock.

For the three and nine months endedSeptember 30, 2016, approximately 707 thousand and 549 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were included in the calculation of diluted earnings per share. For those same periods, approximately 175 thousand and 178 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were not included in the calculation of diluted earnings per share because the effect would have been antidilutive.

For the three and nine months endedSeptember 30, 2015, approximately 514 thousand and 545 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were included in the calculation of diluted earnings per share. For those same periods, approximately 106 thousand and 107 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were not included in the calculation of diluted earnings per share because the effect would have been antidilutive.

11

Note C. Investments

The significant components of Net investment income are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Fixed maturity securities	$	457		$	449		$	1,352		$	1,344
Equity securities	1			3			8			9
Limited partnership investments	65			(93		)	97			69
Mortgage loans	8			8			30			25
Short term investments	2			2			6			4
Trading portfolio	1			1			7			6
Other	4			1			4			1
Gross investment income	538			371			1,504			1,458
Investment expense	(14		)	(17		)	(43		)	(46		)
Net investment income	$	524		$	354		$	1,461		$	1,412

Net realized investment gains (losses) are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net realized investment gains (losses):
Fixed maturity securities:
Gross realized gains	$	67		$	22		$	152		$	91
Gross realized losses	(20		)	(51		)	(106		)	(120		)
Net realized investment gains (losses) on fixed maturity securities	47			(29		)	46			(29		)
Equity securities:
Gross realized gains	1			1			5			2
Gross realized losses	(4		)	(19		)	(10		)	(21		)
Net realized investment gains (losses) on equity securities	(3		)	(18		)	(5		)	(19		)
Derivative financial instruments	1			(1		)	(12		)	9
Short term investments and other	1			(1		)	(3		)	—
Net realized investment gains (losses)	$	46		$	(49	)	$	26		$	(39	)

Net realized investment losses for the nine months ended September 30, 2016 include $8 million related to the first quarter 2016 redemption of the Company's $350 million senior notes due August 2016.

The components of Net other-than-temporary impairment (OTTI) losses recognized in earnings by asset type are presented in the following table.

Periods ended September 30	Three Months				Nine Months
(In millions)	2016		2015		2016		2015
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	14	$	36	$	43	$	52
States, municipalities and political subdivisions	—		—		—		18
Asset-backed:
Residential mortgage-backed	—		1		1		7
Other asset-backed	—		—		3		1
Total asset-backed	—		1		4		8
Total fixed maturity securities available-for-sale	14		37		47		78
Equity securities available-for-sale -- Common stock	4		19		9		20
Short term investments	—		—		—		1
OTTI losses recognized in earnings	$	18	$	56	$	56	$	99

12

The following tables present a summary of fixed maturity and equity securities.

September 30, 2016	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Unrealized OTTI Losses (Gains)
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	17,985	$	1,867	$	36	$	19,816	$	(1	)
States, municipalities and political subdivisions	11,566		1,937		2		13,501		(27		)
Asset-backed:
Residential mortgage-backed	5,174		206		15		5,365		(24		)
Commercial mortgage-backed	2,064		88		8		2,144		—
Other asset-backed	948		12		1		959		—
Total asset-backed	8,186		306		24		8,468		(24		)
U.S. Treasury and obligations of government-sponsored enterprises	68		8		—		76		—
Foreign government	415		23		—		438		—
Redeemable preferred stock	18		2		—		20		—
Total fixed maturity securities available-for-sale	38,238		4,143		62		42,319		$	(52	)
Total fixed maturity securities trading	2						2
Equity securities available-for-sale:
Common stock	15		6		1		20
Preferred stock	93		5		2		96
Total equity securities available-for-sale	108		11		3		116
Total	$	38,348	$	4,154	$	65	$	42,437

December 31, 2015	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Unrealized OTTI Losses (Gains)
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	17,080	$	1,019	$	342	$	17,757	$	—
States, municipalities and political subdivisions	11,729		1,453		8		13,174		(4		)
Asset-backed:
Residential mortgage-backed	4,935		154		17		5,072		(37		)
Commercial mortgage-backed	2,154		55		12		2,197		—
Other asset-backed	923		6		8		921		—
Total asset-backed	8,012		215		37		8,190		(37		)
U.S. Treasury and obligations of government-sponsored enterprises	62		5		—		67		—
Foreign government	334		13		1		346		—
Redeemable preferred stock	33		2		—		35		—
Total fixed maturity securities available-for-sale	37,250		2,707		388		39,569		$	(41	)
Total fixed maturity securities trading	3						3
Equity securities available-for-sale:
Common stock	46		3		1		48
Preferred stock	145		7		3		149
Total equity securities available-for-sale	191		10		4		197
Total	$	37,444	$	2,717	$	392	$	39,769

13

The net unrealized gains on investments included in the tables above are recorded as a component of Accumulated other comprehensive income (AOCI). When presented in AOCI, these amounts are net of tax and any required Shadow Adjustments. To the extent that unrealized gains on fixed income securities supporting certain products within the Life & Group Non-Core segment would result in a premium deficiency if realized, a related increase in Insurance reserves is recorded, net of tax, as a reduction of net unrealized gains through Other comprehensive income (loss) (Shadow Adjustments). As of September 30, 2016 and December 31, 2015, the net unrealized gains on investments included in AOCI were correspondingly reduced by Shadow Adjustments of $1,681 million and $1,111 million.

14

The following tables present the estimated fair value and gross unrealized losses of fixed maturity and equity securities in a gross unrealized loss position by the length of time in which the securities have continuously been in that position.

	Less than 12 Months				12 Months or Longer				Total
September 30, 2016	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	617	$	10	$	338	$	26	$	955	$	36
States, municipalities and political subdivisions	163		2		9		—		172		2
Asset-backed:
Residential mortgage-backed	273		6		212		9		485		15
Commercial mortgage-backed	391		7		96		1		487		8
Other asset-backed	153		1		17		—		170		1
Total asset-backed	817		14		325		10		1,142		24
U.S. Treasury and obligations of government-sponsored enterprises	2		—		—		—		2		—
Foreign government	16		—		—		—		16		—
Total fixed maturity securities available-for-sale	1,615		26		672		36		2,287		62
Equity securities available-for-sale:
Common stock	—		1		—		—		—		1
Preferred stock	15		2		—		—		15		2
Total equity securities available-for-sale	15		3		—		—		15		3
Total	$	1,630	$	29	$	672	$	36	$	2,302	$	65

	Less than 12 Months				12 Months or Longer				Total
December 31, 2015	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	4,882	$	302	$	162	$	40	$	5,044	$	342
States, municipalities and political subdivisions	338		8		75		—		413		8
Asset-backed:
Residential mortgage-backed	963		9		164		8		1,127		17
Commercial mortgage-backed	652		10		96		2		748		12
Other asset-backed	552		8		5		—		557		8
Total asset-backed	2,167		27		265		10		2,432		37
U.S. Treasury and obligations of government-sponsored enterprises	4		—		—		—		4		—
Foreign government	54		1		—		—		54		1
Redeemable preferred stock	3		—		—		—		3		—
Total fixed maturity securities available-for-sale	7,448		338		502		50		7,950		388
Equity securities available-for-sale:
Common stock	3		1		—		—		3		1
Preferred stock	13		3		—		—		13		3
Total equity securities available-for-sale	16		4		—		—		16		4
Total	$	7,464	$	342	$	502	$	50	$	7,966	$	392

15

Based on current facts and circumstances, the Company believes the unrealized losses presented in the September 30, 2016 table above are not indicative of the ultimate collectibility of the current amortized cost of the securities, but rather are attributable to changes in interest rates, credit spreads and other factors. The Company has no current intent to sell securities with unrealized losses, nor is it more likely than not that it will be required to sell prior to recovery of amortized cost; accordingly, the Company has determined that there are no additional OTTI losses to be recorded as of September 30, 2016.

The following table presents the activity related to the pretax credit loss component reflected in Retained earnings on fixed maturity securities still held as of September 30, 2016 and 2015 for which a portion of an OTTI loss was recognized in Other comprehensive income (loss).

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Beginning balance of credit losses on fixed maturity securities	$	41		$	59		$	53		$	62
Reductions for securities sold during the period	(2		)	(2		)	(14		)	(5		)
Reductions for securities the Company intends to sell or more likely than not will be required to sell	(1		)	—			(1		)	—
Ending balance of credit losses on fixed maturity securities	$	38		$	57		$	38		$	57

Contractual Maturity

The following table presents available-for-sale fixed maturity securities by contractual maturity.

	September 30, 2016				December 31, 2015
(In millions)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	1,665	$	1,710	$	1,574	$	1,595
Due after one year through five years	9,052		9,584		7,721		8,070
Due after five years through ten years	14,659		15,625		14,652		14,915
Due after ten years	12,862		15,400		13,303		14,989
Total	$	38,238	$	42,319	$	37,250	$	39,569

Actual maturities may differ from contractual maturities because certain securities may be called or prepaid. Securities not due at a single date are allocated based on weighted average life.

Derivative Financial Instruments

The Company holds an embedded derivative on funds withheld liability with a notional value of $175 million and $179 million as of September 30, 2016 and December 31, 2015 and a fair value of $8 million and $(5) million as of September 30, 2016 and December 31, 2015. The embedded derivative on funds withheld liability is accounted for separately and reported with the funds withheld liability in Other liabilities on the Condensed Consolidated Balance Sheets.

Investment Commitments

As of September 30, 2016, the Company had committed approximately $393 million to future capital calls from various third-party limited partnership investments in exchange for an ownership interest in the related partnerships.

As of September 30, 2016, the Company had mortgage loan commitments of $40 million representing signed loan applications received and accepted.

The Company invests in various privately placed debt securities, including bank loans, as part of its overall investment strategy and has committed to additional future purchases, sales and funding. Purchases and sales of privately placed debt securities are recorded once funded. As of September 30, 2016, the Company had commitments to purchase or fund additional amounts of $205 million and sell $163 million under the terms of such securities.

16

Note D. Fair Value

Fair value is the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following fair value hierarchy is used in selecting inputs, with the highest priority given to Level 1, as these are the most transparent or reliable.

Level 1 - Quoted prices for identical instruments in active markets.

Level 2 - Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets.

Level 3 - Valuations derived from valuation techniques in which one or more significant inputs are not observable.

Prices may fall within Level 1, 2 or 3 depending upon the methodology and inputs used to estimate fair value for each specific security. In general the Company seeks to price securities using third-party pricing services. Securities not priced by pricing services are submitted to independent brokers for valuation and, if those are not available, internally developed pricing models are used to value assets using a methodology and inputs the Company believes market participants would use to value the assets. Prices obtained from third-party pricing services or brokers are not adjusted by the Company.

The Company performs control procedures over information obtained from pricing services and brokers to ensure prices received represent a reasonable estimate of fair value and to confirm representations regarding whether inputs are observable or unobservable. Procedures include i) the review of pricing service or broker pricing methodologies, ii) back-testing, where past fair value estimates are compared to actual transactions executed in the market on similar dates, iii) exception reporting, where period-over-period changes in price are reviewed and challenged with the pricing service or broker based on exception criteria, iv) deep dives, where the Company performs an independent analysis of the inputs and assumptions used to price individual securities and v) pricing validation, where prices received are compared to prices independently estimated by the Company.

17

Assets and Liabilities Measured at Fair Value

Assets and liabilities measured at fair value on a recurring basis are presented in the following tables.

September 30, 2016							Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2		Level 3
Assets
Fixed maturity securities:
Corporate and other bonds	$	—	$	19,557	$	261	$	19,818
States, municipalities and political subdivisions	—		13,500		1		13,501
Asset-backed:
Residential mortgage-backed	—		5,286		79		5,365
Commercial mortgage-backed	—		2,120		24		2,144
Other asset-backed	—		916		43		959
Total asset-backed	—		8,322		146		8,468
U.S. Treasury and obligations of government-sponsored enterprises	76		—		—		76
Foreign government	—		438		—		438
Redeemable preferred stock	20		—		—		20
Total fixed maturity securities	96		41,817		408		42,321
Equity securities	97		—		19		116
Other invested assets	—		5		—		5
Short term investments	432		911		—		1,343
Life settlement contracts, included in Other assets	—		—		67		67
Total assets	$	625	$	42,733	$	494	$	43,852
Liabilities
Other liabilities	$	—	$	8	$	—	$	8
Total liabilities	$	—	$	8	$	—	$	8

December 31, 2015								Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2			Level 3
Assets
Fixed maturity securities:
Corporate and other bonds	$	—	$	17,592		$	168	$	17,760
States, municipalities and political subdivisions	—		13,172			2		13,174
Asset-backed:
Residential mortgage-backed	—		4,938			134		5,072
Commercial mortgage-backed	—		2,175			22		2,197
Other asset-backed	—		868			53		921
Total asset-backed	—		7,981			209		8,190
U.S. Treasury and obligations of government-sponsored enterprises	66		1			—		67
Foreign government	—		346			—		346
Redeemable preferred stock	35		—			—		35
Total fixed maturity securities	101		39,092			379		39,572
Equity securities	177		—			20		197
Other invested assets	—		17			—		17
Short term investments	448		1,134			—		1,582
Life settlement contracts, included in Other assets	—		—			74		74
Total assets	$	726	$	40,243		$	473	$	41,442
Liabilities
Other liabilities	$	—	$	(5	)	$	—	$	(5	)
Total liabilities	$	—	$	(5	)	$	—	$	(5	)

18

The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).

Level 3 (In millions)	Balance as of July 1, 2016		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales		Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2016		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2016 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	242	$	1		$	7		$	16	$	—	$	(5	)	$	—	$	—		$	261	$	—
States, municipalities and political subdivisions	2		—			—			—		—		(1		)	—		—			1		—
Asset-backed:
Residential mortgage-backed	134		—			(1		)	5		—		(1		)	—		(58		)	79		—
Commercial mortgage-backed	11		—			—			23		—		(8		)	—		(2		)	24		—
Other asset-backed	45		—			—			34		—		—			—		(36		)	43		—
Total asset-backed	190		—			(1		)	62		—		(9		)	—		(96		)	146		—
Total fixed maturity securities	434		1			6			78		—		(15		)	—		(96		)	408		—
Equity securities	19		(1		)	1			—		—		—			—		—			19		(2		)
Life settlement contracts	67		—			—			—		—		—			—		—			67		—
Total	$	520	$	—		$	7		$	78	$	—	$	(15	)	$	—	$	(96	)	$	494	$	(2	)

19

Level 3 (In millions)	Balance as of July 1, 2015		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*		Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2015		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2015 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	141	$	—	$	—		$	27	$	(1	)	$	(11	)	$	—	$	(3	)	$	153	$	—
States, municipalities and political subdivisions	85		—		—			—		—			—			—		(24		)	61		—
Asset-backed:
Residential mortgage-backed	207		2		(2		)	4		—			(7		)	—		—			204		—
Commercial mortgage-backed	87		5		(4		)	8		—			(15		)	—		(10		)	71		—
Other asset-backed	490		—		(6		)	43		(20		)	(32		)	—		(4		)	471		—
Total asset-backed	784		7		(12		)	55		(20		)	(54		)	—		(14		)	746		—
Total fixed maturity securities	1,010		7		(12		)	82		(21		)	(65		)	—		(41		)	960		—
Equity securities	16		—		(1		)	—		—			—			—		—			15		—
Life settlement contracts	75		5		—			—		—			(6		)	—		—			74		2
Total	$	1,101	$	12	$	(13	)	$	82	$	(21	)	$	(71	)	$	—	$	(41	)	$	1,049	$	2

20

Level 3 (In millions)	Balance as of January 1, 2016		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2016		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2016 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	168	$	1		$	14		$	163	$	(36	)	$	(15	)	$	—	$	(34	)	$	261	$	—
States, municipalities and political subdivisions	2		—			—			—		—			(1		)	—		—			1		—
Asset-backed:
Residential mortgage-backed	134		2			(2		)	15		—			(10		)	—		(60		)	79		—
Commercial mortgage-backed	22		—			—			32		—			(17		)	3		(16		)	24		—
Other asset-backed	53		—			2			69		(25		)	(1		)	2		(57		)	43		—
Total asset-backed	209		2			—			116		(25		)	(28		)	5		(133		)	146		—
Total fixed maturity securities	379		3			14			279		(61		)	(44		)	5		(167		)	408		—
Equity securities	20		(1		)	—			—		—			—			—		—			19		(2		)
Life settlement contracts	74		10			—			—		—			(17		)	—		—			67		2
Total	$	473	$	12		$	14		$	279	$	(61	)	$	(61	)	$	5	$	(167	)	$	494	$	—

21

Level 3 (In millions)	Balance as of January 1, 2015		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2015		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2015 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	162	$	(1	)	$	(1	)	$	39	$	(13	)	$	(32	)	$	37	$	(38	)	$	153	$	—
States, municipalities and political subdivisions	94		1			—			—		—			(10		)	—		(24		)	61		—
Asset-backed:
Residential mortgage-backed	189		4			(4		)	76		—			(28		)	—		(33		)	204		—
Commercial mortgage-backed	83		7			(4		)	23		—			(17		)	17		(38		)	71		—
Other asset-backed	655		3			4			125		(254		)	(52		)	—		(10		)	471		(1		)
Total asset-backed	927		14			(4		)	224		(254		)	(97		)	17		(81		)	746		(1		)
Total fixed maturity securities	1,183		14			(5		)	263		(267		)	(139		)	54		(143		)	960		(1		)
Equity securities	16		—			(1		)	—		—			—			—		—			15		—
Life settlement contracts	82		22			—			—		—			(30		)	—		—			74		1
Total	$	1,281	$	36		$	(6	)	$	263	$	(267	)	$	(169	)	$	54	$	(143	)	$	1,049	$	—

22

*Net realized and unrealized gains and losses from Level 3 securities and derivatives are reported in Net income (loss) as follows:

Major Category of Assets and Liabilities	Condensed Consolidated Statements of Operations Line Items
Fixed maturity securities available-for-sale (1)	Net realized investment gains (losses)
Fixed maturity securities trading	Net investment income
Equity securities (1)	Net realized investment gains (losses)
Other invested assets - Derivative financial instruments held in a trading portfolio	Net investment income
Other invested assets - Derivative financial instruments not held in a trading portfolio	Net realized investment gains (losses)
Life settlement contracts	Other revenues
Other liabilities - Derivative financial instruments	Net realized investment gains (losses)

(1) Unrealized gains and losses are reported within AOCI.

Securities shown on the previous pages may be transferred in or out of levels within the fair value hierarchy based on the availability of observable market information and quoted prices used to determine the fair value of the security. The availability of observable market information and quoted prices varies based on market conditions and trading volume. During the three and nine months endedSeptember 30, 2016 there were no transfers between Level 1 and Level 2. During the three and nine months endedSeptember 30, 2015 there were $10 million of transfers from Level 2 to Level 1 and no transfers from Level 1 to Level 2. The Company's policy is to recognize transfers between levels at the beginning of quarterly reporting periods.

Valuation Methodologies and Inputs

The following section describes the valuation methodologies and relevant inputs used to measure different financial instruments at fair value, including an indication of the level in the fair value hierarchy in which the instruments are generally classified.

Fixed Maturity Securities

Level 1 securities include highly liquid and exchange traded bonds and redeemable preferred stock, valued using quoted market prices. Level 2 securities include most other fixed maturity securities as the significant inputs are observable in the marketplace. All classes of Level 2 fixed maturity securities are valued using a methodology based on information generated by market transactions involving identical or comparable assets, a discounted cash flow methodology, or a combination of both when necessary. Common inputs for all classes of fixed maturity securities include prices from recently executed transactions of similar securities, marketplace quotes, benchmark yields, spreads off benchmark yields, interest rates and U.S. Treasury or swap curves. Specifically for asset-backed securities, key inputs include prepayment and default projections based on past performance of the underlying collateral and current market data. Fixed maturity securities are primarily assigned to Level 3 in cases where broker/dealer quotes are significant inputs to the valuation and there is a lack of transparency as to whether these quotes are based on information that is observable in the marketplace. Level 3 securities also include private placement debt securities whose fair value is determined using internal models with inputs that are not market observable.

Equity Securities

Level 1 equity securities include publicly traded securities valued using quoted market prices. Level 2 securities are primarily non-redeemable preferred stocks and common stocks valued using pricing for similar securities, recently executed transactions and other pricing models utilizing market observable inputs. Level 3 securities are primarily priced using broker/dealer quotes and internal models with inputs that are not market observable.

23

Other Invested Assets

The fair value of Federal Home Loan Bank of Chicago (FHLBC) stock is equal to par because it can only be redeemed by the FHLBC at par or sold to another member of the FHLBC at par and is classified as Level 2.

As of September 30, 2016 and December 31, 2015, there were approximately $30 million and $27 million respectively of overseas deposits within other invested assets, which can be redeemed at net asset value in 90 days or less. Overseas deposits are excluded from the fair value hierarchy because their fair value is recorded using the net asset value per share (or equivalent) practical expedient.

Short Term Investments

Securities that are actively traded or have quoted prices are classified as Level 1. These securities include money market funds and treasury bills. Level 2 primarily includes commercial paper, for which all inputs are market observable. Fixed maturity securities purchased within one year of maturity are valued consistent with fixed maturity securities discussed above. Short term investments as presented in the tables above differ from the amounts presented on the Condensed Consolidated Balance Sheets because certain short term investments, such as time deposits, are not measured at fair value.

Life Settlement Contracts

The fair values of life settlement contracts are determined as the present value of the anticipated death benefits less anticipated premium payments based on contract terms that are distinct for each insured, as well as the Company's own assumptions for mortality, premium expense and the rate of return that a buyer would require on the contracts, as no comparable market pricing data is available.

Derivative Financial Investments

Level 2 securities primarily include the embedded derivative on funds withheld liability. The embedded derivative on funds withheld liability is valued using the change in fair value of the assets supporting the funds withheld liability, which are fixed maturity securities valued with observable inputs.

Significant Unobservable Inputs

The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurement of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company.

September 30, 2016	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	211	Discounted cash flow	Credit spread	2% - 40% (6%)
Life settlement contracts	67		Discounted cash flow	Discount rate risk premium	9%
				Mortality assumption	55% - 1676% (162%)

December 31, 2015	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	138	Discounted cash flow	Credit spread	3% - 184% (6%)
Life settlement contracts	74		Discounted cash flow	Discount rate risk premium	9%
				Mortality assumption	55% - 1676% (164%)

For fixed maturity securities, an increase to the credit spread assumptions would result in a lower fair value measurement. For life settlement contracts, an increase in the discount rate risk premium or decrease in the mortality assumption would result in a lower fair value measurement.

24

Financial Assets and Liabilities Not Measured at Fair Value

The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Condensed Consolidated Balance Sheets are presented in the following tables.

September 30, 2016	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	629	$	—	$	—	$	654	$	654
Liabilities
Long term debt	$	2,709	$	—	$	3,041	$	—	$	3,041

December 31, 2015	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	678	$	—	$	—	$	688	$	688
Liabilities
Short term debt	$	350	$	—	$	360	$	—	$	360
Long term debt	2,210		—		2,433		—		2,433

The following methods and assumptions were used to estimate the fair value of these financial assets and liabilities.

The fair value of Mortgage loans was based on the present value of the expected future cash flows discounted at the current interest rate for origination of similar quality loans, adjusted for specific loan risk.

The Company's senior notes and debentures were valued based on observable market prices. The fair value for other debt was estimated using discounted cash flows based on current incremental borrowing rates for similar borrowing arrangements.

The carrying amounts reported on the Condensed Consolidated Balance Sheets for Cash, Short term investments not carried at fair value, Accrued investment income and certain Other assets and Other liabilities approximate fair value due to the short term nature of these items. These assets and liabilities are not listed in the tables above.

25

Note E. Claim and Claim Adjustment Expense Reserves

The Company's property and casualty insurance claim and claim adjustment expense reserves represent the estimated amounts necessary to resolve all outstanding claims, including incurred but not reported (IBNR) claims as of the reporting date. The Company's reserve projections are based primarily on detailed analysis of the facts in each case, the Company's experience with similar cases and various historical development patterns. Consideration is given to such historical patterns as field reserving trends and claim settlement practices, loss payments, pending levels of unpaid claims and product mix, as well as court decisions, economic conditions including inflation and public attitudes. All of these factors can affect the estimation of claim and claim adjustment expense reserves.

Establishing claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves for catastrophic events that have occurred, is an estimation process. Many factors can ultimately affect the final settlement of a claim and, therefore, the necessary reserve. Changes in the law, results of litigation, medical costs, the cost of repair materials and labor rates can all affect ultimate claim costs. In addition, time can be a critical part of reserving determinations since the longer the span between the incidence of a loss and the payment or settlement of the claim, the more variable the ultimate settlement amount can be. Accordingly, short-tail claims, such as property damage claims, tend to be more reasonably estimable than long-tail claims, such as workers' compensation, general liability and professional liability claims. Adjustments to prior year reserve estimates, if necessary, are reflected in the results of operations in the period that the need for such adjustments is determined. There can be no assurance that the Company's ultimate cost for insurance losses will not exceed current estimates.

Catastrophes are an inherent risk of the property and casualty insurance business and have contributed to material period-to-period fluctuations in the Company's results of operations and/or equity. The Company reported catastrophe losses, net of reinsurance, of $16 million and $137 million for the three and nine months endedSeptember 30, 2016. Catastrophe losses in 2016 resulted primarily from U.S. weather-related events and the Fort McMurray wildfires. The Company reported catastrophe losses, net of reinsurance, of $14 million and $103 million for the three and nine months endedSeptember 30, 2015.

26

Net Prior Year Development

The following tables and discussion present the net prior year development.

Three months ended September 30, 2016
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(112	)	$	(5	)	$	(15	)	$	—	$	(132	)
Pretax (favorable) unfavorable premium development	—			(3		)	(2		)	—		(5		)
Total pretax (favorable) unfavorable net prior year development	$	(112	)	$	(8	)	$	(17	)	$	—	$	(137	)

Three months ended September 30, 2015
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(130	)	$	(11	)	$	(34	)	$	—	$	(175	)
Pretax (favorable) unfavorable premium development	(2		)	(5		)	2			—		(5		)
Total pretax (favorable) unfavorable net prior year development	$	(132	)	$	(16	)	$	(32	)	$	—	$	(180	)

Nine months ended September 30, 2016
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(211	)	$	(37	)	$	(34	)	$	—	$	(282	)
Pretax (favorable) unfavorable premium development	(18		)	(7		)	(2		)	—		(27		)
Total pretax (favorable) unfavorable net prior year development	$	(229	)	$	(44	)	$	(36	)	$	—	$	(309	)

Nine months ended September 30, 2015
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(141	)	$	—		$	(46	)	$	—	$	(187	)
Pretax (favorable) unfavorable premium development	(10		)	(17		)	16			—		(11		)
Total pretax (favorable) unfavorable net prior year development	$	(151	)	$	(17	)	$	(30	)	$	—	$	(198	)

27

Specialty

The following table presents further detail of the net prior year claim and allocated claim adjustment expense reserve development (development) recorded for the Specialty segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Medical Professional Liability	$	13		$	(19	)	$	(17	)	$	(11	)
Other Professional Liability and Management Liability	(48		)	(37		)	(98		)	(41		)
Surety	(63		)	(70		)	(63		)	(69		)
Warranty	2			—			7			1
Other	(16		)	(4		)	(40		)	(21		)
Total pretax (favorable) unfavorable development	$	(112	)	$	(130	)	$	(211	)	$	(141	)

Three Months

2016

Unfavorable development for medical professional liability was largely due to higher than expected frequency in accident years 2014 and 2015 in aging services. Increased claims on a specific hospital policy in accident years 2014 and 2015 was also an unfavorable contributor although more than offset by favorable development relative to expectations in accident years 2013 and prior.

Favorable development in other professional liability and management liability was primarily related to lower than expected frequency of claims and favorable outcomes on specific claims for accident years 2010 through 2014.

Favorable development in surety coverages was primarily due to lower than expected frequency of large losses in accident years 2014 and prior.

Favorable development for other coverages was due to better than expected claim frequency in commercial lines coverages provided to Specialty customers in accident years 2010 through 2015.

2015

Favorable development in medical professional liability was related to lower than expected severity in accident years 2008 through 2013.

Favorable development in other professional liability and management liability was related to better than expected large loss emergence in financial institutions in accident years 2012 and prior. Additional favorable development related to lower than expected severity in accident years 2009 through 2013 for directors and officers liability.

Favorable development for surety coverages was primarily due to lower than expected frequency of large losses in accident years 2013 and prior.

28

Nine Months

2016

Favorable development for medical professional liability was primarily due to lower than expected severities for individual healthcare professionals, allied facilities and hospitals in accident years 2011 and prior. This was partially offset by unfavorable development in accident years 2012 and 2013 related to higher than expected large loss emergence in hospitals and higher than expected frequency and severity in accident years 2014 and 2015 in our aging services business.

Favorable development in other professional liability and management liability was primarily related to favorable settlements on closed claims in accident years 2011 through 2013 in professional services. Additional favorable development related to lower than expected frequency of claims and favorable outcomes on specific claims in accident years 2010 through 2014 in professional services. This was partially offset by unfavorable development related to a specific financial institutions claim in accident year 2014, higher severities in accident year 2015, and deterioration on credit crises-related claims in accident year 2009.

Favorable development in surety coverages was primarily due to lower than expected frequency of large losses in accident years 2014 and prior.

Favorable development for other coverages provided to Specialty customers was due to better than expected claim frequency in property coverages in accident year 2015 and commercial lines coverages in accident years 2010 through 2015.

2015

Overall, favorable development for medical professional liability was related to lower than expected severity in accident years 2008 through 2013. Unfavorable development was recorded related to increased claim frequency in the aging services business for accident years 2013 and 2014.

Overall, favorable development in other professional liability and management liability related to better than expected large loss emergence in financial institutions in accident years 2012 and prior. Additional favorable development related to lower than expected severity in accident years 2009 through 2013 for directors and officers liability and lower than expected severity in accident years 2010 and prior for professional services. Unfavorable development was related to increased claim frequency on public company management liability in accident years 2012 through 2014.

Favorable development for surety coverages was primarily due to lower than expected frequency of large losses in accident years 2013 and prior.

Favorable development for other coverages was due to better than expected claim frequency in property coverages provided to Specialty customers in accident year 2014.

29

Commercial

The following table presents further detail of the development recorded for the Commercial segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Commercial Auto	$	(12	)	$	—		$	(47	)	$	7
General Liability	14			3			(38		)	8
Workers' Compensation	(6		)	(1		)	48			22
Property and Other	(1		)	(13		)	—			(37		)
Total pretax (favorable) unfavorable development	$	(5	)	$	(11	)	$	(37	)	$	—

Three Months

2016

Favorable development for commercial auto was primarily due to lower than expected severities in accident years 2012 through 2015.

Unfavorable development for general liability was primarily due to an increase in reported claims prior to the closing of the three year window set forth by the Minnesota Child Victims Act in accident years 2006 and prior.

Favorable development for workers' compensation was primarily driven by lower than expected frequencies in accident years 2009 through 2014, partially offset by the estimated impact of recent Florida court rulings in accident years 2008 through 2015.

2015

Favorable development for property and other was primarily due to better than expected loss emergence on catastrophe events in accident year 2014.

30

Nine Months

2016

Favorable development for commercial auto was primarily due to favorable settlements on claims in accident years 2010 through 2014 and lower than expected severities in accident years 2012 through 2015.

Favorable development for general liability was primarily due to better than expected claim settlements in accident years 2012 through 2014 and better than expected severity on umbrella claims in accident years 2010 through 2013. This was partially offset by unfavorable development related to an increase in reported claims prior to the closing of the three year window set forth by the Minnesota Child Victims Act in accident years 2006 and prior.

Unfavorable development for workers' compensation was primarily due to higher than expected severity for Defense Base Act contractors and the estimated impact of recent Florida court rulings in accident years 2008 through 2015. This was partially offset by favorable development related to lower than expected frequencies related to accident years 2009 through 2014.

Unfavorable development for property and other was primarily due to higher than expected severity from a 2015 catastrophe event. This was offset by favorable development primarily due to better than expected loss frequency in accident years 2013 through 2015.

2015

Unfavorable development for workers’ compensation was primarily due to higher than expected severity related to Defense Base Act contractors in accident years 2008 through 2013.

Favorable development for property and other was primarily due to better than expected loss emergence from 2012 and 2014 catastrophe events and better than expected frequency of large claims in accident year 2014.

The nine months also included unfavorable loss development related to an extra contractual obligation loss and losses associated with premium development.

31

International

The following table presents further detail of the development recorded for the International segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Medical Professional Liability	$	(2	)	$	(8	)	$	(3	)	$	(8	)
Other Professional Liability	(1		)	(11		)	16			(16		)
Liability	(2		)	(5		)	(21		)	(12		)
Property & Marine	(9		)	(5		)	(16		)	(19		)
Other	(1		)	(5		)	(10		)	9
Total pretax (favorable) unfavorable development	$	(15	)	$	(34	)	$	(34	)	$	(46	)

Three Months

2016

Favorable development for other professional liability was primarily due to favorable settlements on claims in accident years 2013 and prior. This was largely offset by higher than expected unfavorable large loss emergence in accident years 2014 and 2015.

Favorable development for property and marine was primarily due to favorable emergence of expected losses on a specific claim relating to the December 2015 United Kingdom (UK) Floods.

2015

Favorable development in medical professional liability was due to better than expected loss emergence on accident years 2011 to 2013.

Favorable development in other professional liability was due to better than expected large loss emergence in accident years 2011 and prior.

Favorable development in liability was due to better than expected large loss emergence in accident years 2012 and prior.

Favorable development in property and marine was due to better than expected individual large loss emergence and favorable settlements on large claims in accident years 2013 and 2014.

32

Nine Months

2016

Unfavorable development for other professional liability was primarily due to higher than expected large loss emergence in accident years 2011 through 2015, partially offset by favorable settlements on claims in accident years 2013 and prior.

Favorable development for liability was primarily due to better than expected severity in accident years 2013 and prior.

Favorable development for property and marine was primarily due to favorable emergence of expected losses on a specific claim relating to the December 2015 UK Floods.

Favorable development for other coverages was primarily due to better than expected severity in auto liability in accident years 2011 through 2015.

2015

Favorable development in medical professional liability was due to better than expected loss emergence on accident years 2011 to 2013.

Favorable development in other professional liability was due to better than expected large loss emergence in accident years 2011 and prior.

Favorable development in liability was due to better than expected large loss emergence in accident years 2012 and prior.

Favorable development in property and marine was due to better than expected individual large loss emergence and favorable settlements on large claims in accident years 2013 and 2014.

Unfavorable development in other is due to higher than expected large losses in financial institutions and political risk, primarily in accident year 2014.

33

Asbestos and Environmental Pollution (A&EP) Reserves

In 2010, Continental Casualty Company (CCC) together with several of the Company’s insurance subsidiaries completed a transaction with National Indemnity Company (NICO), a subsidiary of Berkshire Hathaway Inc., under which substantially all of the Company’s legacy A&EP liabilities were ceded to NICO through a Loss Portfolio Transfer (LPT). At the effective date of the transaction, the Company ceded approximately $1.6 billion of net A&EP claim and allocated claim adjustment expense reserves to NICO under a retroactive reinsurance agreement with an aggregate limit of $4 billion. The $1.6 billion of claim and allocated claim adjustment expense reserves ceded to NICO was net of $1.2 billion of ceded claim and allocated claim adjustment expense reserves under existing third-party reinsurance contracts. The NICO LPT aggregate reinsurance limit also covers credit risk on the existing third-party reinsurance related to these liabilities. The Company paid NICO a reinsurance premium of $2 billion and transferred to NICO billed third-party reinsurance receivables related to A&EP claims with a net book value of $215 million, resulting in total consideration of $2.2 billion.

Through December 31, 2013, the Company recognized $0.9 billion of additional amounts ceded under the LPT. As a result, the cumulative amounts ceded under the LPT exceeded the $2.2 billion consideration paid, resulting in the NICO LPT moving into a gain position, requiring deferred retroactive reinsurance accounting treatment. This deferred gain is recognized in earnings in proportion to actual paid recoveries under the LPT. Over the life of the contract, there is no economic impact as long as any additional losses incurred are within the limit of the LPT. In a period in which a change in the estimate of ceded incurred losses is recognized, the change to the deferred gain is cumulatively recognized in earnings as if the revised estimate was available at the effective date of the LPT.

The following table presents the impact of the Loss Portfolio Transfer on the Condensed Consolidated Statements of Operations.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net A&EP adverse development before consideration of LPT	$	—		$	—		$	200		$	150
Provision for uncollectible third-party reinsurance on A&EP	—			—			—			—
Additional amounts ceded under LPT	—			—			200			150
Retroactive reinsurance benefit recognized	(12		)	(4		)	(94		)	(75		)
Pretax impact of unrecognized deferred retroactive reinsurance benefit	$	(12	)	$	(4	)	$	106		$	75

The Company completed its reserve review of A&EP reserves in the first quarter of 2016. Based upon the Company's review, net unfavorable development prior to cessions to the LPT of $200 million was recognized. The unfavorable development was driven by an increase in anticipated future expenses associated with determination of coverage, higher anticipated payouts associated with a limited number of historical accounts having significant asbestos exposures and higher than expected severity on pollution claims. This unfavorable development was ceded to NICO under the LPT; however, the Company’s Net income was negatively affected due to the application of retroactive reinsurance accounting, as only a portion of the additional amounts ceded under the LPT were recognized in that quarter. All amounts recognized related to the LPT are recorded within Insurance claims and policyholders’ benefits in the Condensed Consolidated Statement of Operations.

As of September 30, 2016 and December 31, 2015, the cumulative amounts ceded under the LPT were $2.8 billion and $2.6 billion. The unrecognized deferred retroactive reinsurance benefit was $347 million and $241 million as of September 30, 2016 and December 31, 2015.

NICO established a collateral trust account as security for its obligations to the Company. The fair value of the collateral trust account was $2.5 billion and $2.8 billion as of September 30, 2016 and December 31, 2015. In addition, Berkshire Hathaway Inc. guaranteed the payment obligations of NICO up to the full aggregate reinsurance limit as well as certain of NICO’s performance obligations under the trust agreement. NICO is responsible for claims handling and billing and collection from third-party reinsurers related to the Company’s A&EP claims.

34

Note F. Legal Proceedings and Contingent Liabilities

CNA 401(k) Plus Plan Litigation

In September 2016, a class action lawsuit was filed against CCC, Continental Assurance Company (CAC), CNAF, the Investment Committee of the CNA 401(k) Plus Plan, The Northern Trust Company and John Does 1-10 (collectively Defendants) over the CNA 401(k) Plus Plan. The complaint alleges that Defendants breached fiduciary duties to the CNA 401(k) Plus Plan and caused prohibited transactions in violation of The Employee Retirement Income Security Act of 1974 when the CNA Fixed Income Fund’s annuity contract with CAC was canceled. The plaintiff alleges he and a proposed class of the CNA 401(k) Plus Plan participants who had invested in the Fixed Income Fund suffered lower returns in their CNA 401(k) Plus Plan investments as a consequence of these alleged violations and seeks relief on behalf of the putative class. Management has only recently begun evaluating the lawsuit as this litigation is in its preliminary stages, and as of yet no class has been certified. CCC and the other Defendants are contesting the case and management currently is unable to predict the final outcome or the impact on the Company’s financial condition, results of operations, or cash flows. As of September 30, 2016, the likelihood of loss is reasonably possible, but the amount of loss, if any, cannot be estimated at this stage of the litigation.

Other Litigation

The Company is a party to other routine litigation incidental to its business, which, based on the facts and circumstances currently known, is not material to the Condensed Consolidated Financial Statements.

Note G. Benefit Plans

The components of net periodic cost (benefit) are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pension cost (benefit)
Service cost	$	—		$	—		$	—		$	4
Interest cost on projected benefit obligation	29			29			85			85
Expected return on plan assets	(41		)	(44		)	(121		)	(131		)
Amortization of net actuarial loss	9			7			28			26
Net periodic pension cost (benefit)	$	(3	)	$	(8	)	$	(8	)	$	(16	)

35

Note H. Commitments, Contingencies and Guarantees

Commitments and Contingencies

The Company holds an investment in a real estate joint venture in which the Company, on a joint and several basis with the other unrelated shareholders guaranteed to fund operating deficits of the joint venture and an operating lease for an office building entered into by the venture. The lease was terminated in March 2016. In the event that the other parties to the joint venture are unable to meet their commitments in funding this joint venture, the Company would be required to assume future obligations, primarily related to the wind-down of the lease and joint venture. The Company does not believe it is likely that it will be required to do so. However, as of September 30, 2016, the maximum potential loss that the Company could be required to pay under this guarantee, in excess of amounts already recorded, was approximately $12 million. If the Company were required to assume future obligations, the Company would have the right to pursue reimbursement from the other shareholders.

Guarantees

As of September 30, 2016 and December 31, 2015, the Company had recorded liabilities of approximately $5 million related to guarantee and indemnification agreements and management believes that it is not likely that any future indemnity claims will be significantly greater than the amounts recorded.

In the course of selling business entities and assets to third parties, the Company agreed to guarantee the performance of certain obligations of a previously owned subsidiary and to indemnify purchasers for losses arising out of breaches of representations and warranties with respect to the business entities or assets sold, including, in certain cases, losses arising from undisclosed liabilities or certain named litigation. Such guarantee and indemnification agreements in effect for sales of business entities, assets and third-party loans may include provisions that survive indefinitely. As of September 30, 2016, the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $258 million. Should the Company be required to make payments under the guarantee, it would have the right to seek reimbursement in certain cases from an affiliate of a previously owned subsidiary.

In addition, the Company has agreed to provide indemnification to third-party purchasers for certain losses associated with sold business entities or assets that are not limited by a contractual monetary amount. As of September 30, 2016, the Company had outstanding unlimited indemnifications in connection with the sales of certain of its business entities or assets that included tax liabilities arising prior to a purchaser's ownership of an entity or asset, defects in title at the time of sale, employee claims arising prior to closing and in some cases losses arising from certain litigation and undisclosed liabilities. Certain provisions of the indemnification agreements survive indefinitely, while others survive until the applicable statutes of limitation expire, or until the agreed-upon contract terms expire.

The Company also provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities provided by a previously owned subsidiary. As of September 30, 2016, the potential amount of future payments the Company could be required to pay under these guarantees was approximately $1.9 billion, which will be paid over the lifetime of the annuitants. The Company does not believe any payment is likely under these guarantees, as the Company is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities.

36

Note I. Accumulated Other Comprehensive Income (Loss) by Component

The tables below display the changes in Accumulated other comprehensive income (loss) by component.

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments		Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of July 1, 2016	$	31	$	934	$	(637	)	$	(118	)	$	210
Other comprehensive income (loss) before reclassifications	7		69		—			(24		)	52
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(2), $(13), $3, $- and $(12)	4		27		(6		)	—			25
Other comprehensive income (loss) net of tax (expense) benefit of $(2), $(19), $(3), $- and $(24)	3		42		6			(24		)	27
Balance as of September 30, 2016	$	34	$	976	$	(631	)	$	(142	)	$	237

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments			Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of July 1, 2015	$	31	$	689		$	(585	)	$	8		$	143
Other comprehensive income (loss) before reclassifications	2		(67		)	—			(53		)	(118		)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $-, $17, $2, $- and $19	—		(31		)	(4		)	—			(35		)
Other comprehensive income (loss) net of tax (expense) benefit of $(1), $21, $(2), $- and $18	2		(36		)	4			(53		)	(83		)
Balance as of September 30, 2015	$	33	$	653		$	(581	)	$	(45	)	$	60

37

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments		Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of January 1, 2016	$	27	$	390	$	(648	)	$	(84	)	$	(315	)
Other comprehensive income (loss) before reclassifications	9		615		—			(58		)	566
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(1), $(12), $9, $- and $(4)	2		29		(17		)	—			14
Other comprehensive income (loss) net of tax (expense) benefit of $(4), $(292), $(9), $- and $(305)	7		586		17			(58		)	552
Balance as of September 30, 2016	$	34	$	976	$	(631	)	$	(142	)	$	237

(In millions)	Net unrealized gains (losses) on investments with OTTI losses			Net unrealized gains (losses) on other investments			Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of January 1, 2015	$	36		$	942		$	(633	)	$	55		$	400
Other comprehensive income (loss) before reclassifications	(3		)	(318		)	36			(100		)	(385		)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $-, $22, $9, $- and $31	—			(29		)	(16		)	—			(45		)
Other comprehensive income (loss) net of tax (expense) benefit of $1, $140, $(28), $- and $113	(3		)	(289		)	52			(100		)	(340		)
Balance as of September 30, 2015	$	33		$	653		$	(581	)	$	(45	)	$	60

Amounts reclassified from Accumulated other comprehensive income (loss) shown above are reported in Net income (loss) as follows:

Component of AOCI	Condensed Consolidated Statements of Operations Line Item Affected by Reclassifications
Net unrealized gains (losses) on investments with OTTI losses	Net realized investment gains (losses)
Net unrealized gains (losses) on other investments	Net realized investment gains (losses)
Pension and postretirement benefits	Other operating expenses

38

Note J. Business Segments

The Company's core property and casualty commercial insurance operations are aggregated and reported in three business segments: Specialty, Commercial and International. The Company's non-core operations are managed and reported in two segments: Life & Group Non-Core and Corporate & Other Non-Core.

The accounting policies of the segments are the same as those described in Note A to the Consolidated Financial Statements within CNAF's Annual Report on Form 10-K for the year ended December 31, 2015. The Company manages most of its assets on a legal entity basis, while segment operations are generally conducted across legal entities. As such, only Insurance and Reinsurance receivables, Insurance reserves, Deferred acquisition costs and Goodwill are readily identifiable for all individual segments. Distinct investment portfolios are not maintained for every individual segment; accordingly, allocation of assets to each segment is not performed. Therefore, a significant portion of Net investment income and Realized investment gains or losses are allocated primarily based on each segment's net carried insurance reserves, as adjusted. All significant intersegment income and expense has been eliminated. Income taxes have been allocated on the basis of the taxable income of the segments.

In the following tables, certain financial measures are presented to provide information used by management to monitor the Company's operating performance. Management utilizes these financial measures to monitor the Company's insurance operations and investment portfolio. Net operating income (loss), which is derived from certain income statement amounts, is used by management to monitor performance of the Company's insurance operations. The Company's investment portfolio is monitored by management through analysis of various factors including unrealized gains and losses on securities, portfolio duration and exposure to market and credit risk. Based on such analyses, the Company may recognize an OTTI loss on an investment security in accordance with its policy, or sell a security, which may produce realized gains and losses.

Net operating income (loss) is calculated by excluding from net income (loss) the after-tax effects of i) net realized investment gains (losses) ii) income or loss from discontinued operations and iii) any cumulative effects of changes in accounting guidance. The calculation of net operating income excludes net realized investment gains (losses) because net realized investment gains (losses) are largely discretionary, except for some losses related to OTTI, and are generally driven by economic factors that are not necessarily consistent with key drivers of underwriting performance, and are therefore not considered an indication of trends in insurance operations.

39

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

40

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

41

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

42

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

43

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

44

Note K. Organization Review

In 2016, the Company completed a comprehensive organization review intended to improve effectiveness and efficiency. The review resulted in the elimination of approximately 370 positions. The Company will incur employee termination costs as a result of these actions. The Company anticipates that the total cost resulting from the organization review will be approximately $20 million, of which $11 million and $17 million was incurred during the three and nine months endedSeptember 30, 2016. Additional termination costs will be incurred through March 2017. The costs incurred to date are included in Total claims, benefits, and expenses on the consolidated Statements of Operations and have been allocated to the Company's reportable segments in a manner consistent with the Company's current allocation of personnel costs. The costs by reportable segment for the periods ended September 30, 2016, are presented in the following table.

Periods ended September 30, 2016	Three Months		Nine Months
(In millions)
Specialty	$	3	$	4
Commercial	7		12
International	—		—
Life & Group Non-Core	1		1
Corporate & Other Non-Core	—		—
Total organization review costs	$	11	$	17

45

Item 2. Management's Discussion and Analysis (MD&A) of Financial Condition and Results of Operations

Overview

The following discussion highlights significant factors affecting the Company. References to “we,” “our,” “us” or like terms refer to the business of CNA. Based on 2015 statutory net written premiums, we are the eighth largest commercial insurance writer and the 14^th largest property and casualty insurance organization in the United States of America.

The following discussion should be read in conjunction with the Condensed Consolidated Financial Statements included under Part I, Item 1 of this Form 10-Q and Item 1A Risk Factors and Item 7 Management's Discussion and Analysis of Financial Condition and Results of Operations, which are included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission for the year ended December 31, 2015.

We utilize the net operating income (loss) financial measure to monitor our operations. Net operating income (loss) is calculated by excluding from net income (loss) the after-tax effects of 1) net realized investment gains or losses, 2) income or loss from discontinued operations and 3) any cumulative effects of changes in accounting guidance. The calculation of net operating income excludes net realized investment gains or losses because net realized investment gains or losses are largely discretionary, except for some losses related to OTTI, and are generally driven by economic factors that are not necessarily consistent with key drivers of underwriting performance, and are therefore not considered an indication of trends in insurance operations. Management monitors net operating income (loss) for each business segment to assess segment performance. Presentation of consolidated net operating income (loss) is deemed to be a non-GAAP financial measure. See further discussion regarding how we manage our business in Note J to the Condensed Consolidated Financial Statements included under Part I, Item 1. For reconciliations of non-GAAP measures to the most comparable GAAP measures and other information, please refer herein and/or to CNA's most recent 10-K on file with the Securities and Exchange Commission.

In the evaluation of the results of our core Specialty, Commercial and International segments, we utilize the loss ratio, the expense ratio, the dividend ratio and the combined ratio. These ratios are calculated using GAAP financial results. The loss ratio is the percentage of net incurred claim and claim adjustment expenses to net earned premiums. The expense ratio is the percentage of insurance underwriting and acquisition expenses, including the amortization of deferred acquisition costs, to net earned premiums. The dividend ratio is the ratio of policyholders' dividends incurred to net earned premiums. The combined ratio is the sum of the loss, expense and dividend ratios. In addition we also utilize rate, retention and new business in evaluating operating trends. Rate represents the average change in price on policies that renew excluding exposure change. Retention represents the percentage of premium dollars renewed in comparison to the expiring premium dollars from policies available to renew. New business represents premiums from policies written with new customers and additional policies written with existing customers.

Changes in estimates of claim and allocated claim adjustment expense reserves and premium accruals, net of reinsurance, for prior years are defined as net prior year development within this MD&A. These changes can be favorable or unfavorable. Net prior year development does not include the effect of related acquisition expenses. Further information on our reserves is provided in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

46

CRITICAL ACCOUNTING ESTIMATES

The preparation of the Condensed Consolidated Financial Statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Condensed Consolidated Financial Statements and the amounts of revenues and expenses reported during the period. Actual results may differ from those estimates.

Our Condensed Consolidated Financial Statements and accompanying notes have been prepared in accordance with GAAP applied on a consistent basis. We continually evaluate the accounting policies and estimates used to prepare the Condensed Consolidated Financial Statements. In general, our estimates are based on historical experience, evaluation of current trends, information from third-party professionals and various other assumptions that are believed to be reasonable under the known facts and circumstances.

The accounting estimates below are considered by us to be critical to an understanding of our Condensed Consolidated Financial Statements as their application places the most significant demands on our judgment.

• Insurance Reserves

• Reinsurance and Insurance Receivables

• Valuation of Investments and Impairment of Securities

• Long Term Care Policies

• Pension and Postretirement Benefit Obligations

• Income Taxes

Due to the inherent uncertainties involved with these types of judgments, actual results could differ significantly from estimates and may have a material adverse impact on our results of operations or equity. See the Critical Accounting Estimates section of our Management's Discussion and Analysis of Financial Condition and Results of Operations included under Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2015 for further information.

47

CONSOLIDATED OPERATIONS

The following table includes the consolidated results of our operations. For more detailed components of our business operations and the net operating income financial measure, see the segment discussions within this MD&A. For further discussion of Net investment income and Net realized investment results, see the Investments section of this MD&A.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Operating Revenues
Net earned premiums	$	1,767		$	1,751		$	5,196		$	5,173
Net investment income	524			354			1,461			1,412
Other revenues	96			97			293			286
Total operating revenues	2,387			2,202			6,950			6,871
Claims, Benefits and Expenses
Net incurred claims and benefits	1,195			1,198			3,934			3,999
Policyholders' dividends	7			2			15			9
Amortization of deferred acquisition costs	314			319			926			936
Other insurance related expenses	295			263			842			790
Other expenses	147			138			439			388
Total claims, benefits and expenses	1,958			1,920			6,156			6,122
Operating income before income tax	429			282			794			749
Income tax expense on operating income	(118		)	(72		)	(191		)	(182		)
Net operating income	311			210			603			567
Net realized investment gains (losses)	46			(49		)	26			(39		)
Income tax (expense) benefit on net realized investment gains (losses)	(14		)	17			(11		)	21
Net realized investment gains (losses), after tax	32			(32		)	15			(18		)
Net income	$	343		$	178		$	618		$	549

Three Month Comparison

Net operating income increased $101 million for the three months ended September 30, 2016 as compared with the same period in 2015. Net operating income increased $66 million for our core segments primarily due to higher net investment income driven by increased limited partnership returns, partially offset by lower favorable net prior year reserve development and higher underwriting expenses. Net operating results for our non-core segments improved $35 million primarily due to results in our long term care business. Further information on our long term care business is in the Life & Group Non-Core section of this MD&A.

Favorable net prior year development of $137 million and $180 million was recorded for the three months ended September 30, 2016 and 2015 related to our Specialty, Commercial and International segments. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1. Catastrophe losses were $11 million after tax for the three months ended September 30, 2016 as compared to $10 million after tax for the same period in 2015.

In the third quarter of 2016 we completed a comprehensive organization review intended to improve effectiveness and efficiency. Termination costs associated with headcount reductions increased third quarter expenses, primarily underwriting expenses, as well as unallocated loss adjustment expenses by an aggregate of $11 million. The annual savings from this reduction of salaries and related costs is approximately $50 million. We expect this reduction in expenses to contribute to a half of a point reduction in our 2017 property and casualty expense ratio. Further information on the Organization Review is in Note K to the Condensed Consolidated Financial Statements included under Part I, Item 1.

48

Nine Month Comparison

Net operating income increased $36 million for the nine months ended September 30, 2016 as compared with the same period in 2015. Net operating results for our non-core segments improved $35 million primarily driven by our long term care business. Results in our non-core segments were negatively affected by $20 million in after-tax charges related to the application of retroactive reinsurance accounting to adverse reserve development ceded under the 2010 A&EP Loss Portfolio Transfer. This is further discussed in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1. Net operating income increased $1 million for our core segments due to higher favorable net prior year development, offset by higher underwriting expenses and a higher level of large losses and catastrophe losses.

Favorable net prior year development of $309 million and $198 million was recorded for the nine months ended September 30, 2016 and 2015 related to our Specialty, Commercial and International segments. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1. Catastrophe losses were $93 million after tax for the nine months ended September 30, 2016 as compared to $68 million after tax for the same period in 2015.

In the third quarter of 2016 we completed a comprehensive organization review intended to improve effectiveness and efficiency. Termination costs associated with headcount reductions increased expenses, primarily underwriting expenses, as well as unallocated loss adjustment expenses by an aggregate of $17 million for the nine months ended September 30, 2016. Further information on the Organization Review is in Note K to the Condensed Consolidated Financial Statements included under Part I, Item 1.

49

SEGMENT RESULTS

The following discusses the results for our reporting segments. Our core property and casualty commercial insurance operations are managed and reported in three business segments: Specialty, Commercial and International. Our non-core operations are managed and reported in two segments: Life & Group Non-Core and Corporate & Other Non-Core.

50

Specialty

The following table presents the results of operations.

Periods ended September 30	Three Months						Nine Months
(In millions, except ratios, rate and retention)	2016			2015			2016			2015
Net written premiums	$	733		$	707		$	2,108		$	2,077
Net earned premiums	704			706			2,088			2,075
Net investment income	140			76			380			365
Net operating income	195			179			486			451
Net realized investment gains (losses), after tax	6			(14		)	1			(11		)
Net income	201			165			487			440
Other performance metrics:
Loss and loss adjustment expense ratio	46.8		%	43.5		%	52.6		%	55.5		%
Expense ratio	32.5			30.8			32.0			30.9
Dividend ratio	0.6			0.1			0.3			0.2
Combined ratio	79.9		%	74.4		%	84.9		%	86.6		%
Rate	—		%	1		%	1		%	1		%
Retention	87			87			87			86
New business	$	66		$	67		$	192		$	206

Three Month Comparison

Net written premiums for Specialty increased $26 million for the three months ended September 30, 2016 as compared with the same period in 2015, driven by growth in warranty and surety and continued steady retention. The decrease in net earned premiums was consistent with the trend in net written premiums in recent quarters.

Net operating income increased $16 million for the three months ended September 30, 2016 as compared with the same period in 2015, primarily due to an increase in net investment income partially offset by lower favorable net prior year reserve development and higher underwriting expenses.

The combined ratio increased 5.5 points for the three months ended September 30, 2016 as compared with the same period in 2015. The loss ratio increased 3.3 points due to lower favorable net prior year reserve development and a higher non-catastrophe current accident year loss ratio. Catastrophe losses were $1 million, or 0.2 points of the loss ratio for the three months ended September 30, 2016, as compared to $3 million, or 0.5 points of the loss ratio for the three months ended September 30, 2015. The expense ratio increased 1.7 points for the three months ended September 30, 2016 as compared with the same period in 2015. About half of this increase was due to non-recurring underwriting expenses related to the transition to a new service provider for our information technology (IT) infrastructure and employee termination costs resulting from the Organization Review. The remainder was driven by higher IT spending primarily related to new underwriting platforms. See the Consolidated Operations section of this MD&A for further discussion of the Organization Review costs.

Favorable net prior year development of $112 million and $132 million was recorded in the three months ended September 30, 2016 and 2015. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

51

Nine Month Comparison

Net written premiums for Specialty increased $31 million for the nine months ended September 30, 2016 as compared with the same period in 2015, driven by growth in warranty and surety, continued steady retention and positive rate. The increase in net earned premiums was consistent with the trend in net written premiums.

Net operating income increased $35 million for the nine months ended September 30, 2016 as compared with the same period in 2015, primarily due to higher favorable net prior year reserve development and net investment income partially offset by an increase in underwriting expenses.

The combined ratio improved 1.7 points for the nine months ended September 30, 2016 as compared with the same period in 2015. The loss ratio improved 2.9 points primarily due to higher favorable net prior year reserve development partially offset by a higher current accident year loss ratio. Catastrophe losses were $14 million, or 0.7 points of the loss ratio for the nine months ended September 30, 2016, as compared to $15 million, or 0.7 points of the loss ratio for the nine months ended September 30, 2015. The expense ratio increased 1.1 points for the nine months ended September 30, 2016 as compared with the same period in 2015, primarily due to non-recurring underwriting expenses related to the transition to a new service provider for our IT infrastructure and employee termination costs resulting from the Organization Review. The expense ratio also increased due to higher IT spending primarily related to new underwriting platforms. See the Consolidated Operations section of this MD&A for further discussion of the Organization Review costs.

Favorable net prior year development of $229 million and $151 million was recorded for the nine months ended September 30, 2016 and 2015. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

The following table presents the gross and net carried reserves.

(In millions)	September 30, 2016		December 31, 2015
Gross case reserves	$	1,896	$	2,011
Gross IBNR reserves	4,382		4,258
Total gross carried claim and claim adjustment expense reserves	$	6,278	$	6,269
Net case reserves	$	1,684	$	1,810
Net IBNR reserves	3,796		3,758
Total net carried claim and claim adjustment expense reserves	$	5,480	$	5,568

52

Commercial

The following table presents the results of operations.

Periods ended September 30	Three Months						Nine Months
(In millions, except ratios, rate and retention)	2016			2015			2016			2015
Net written premiums	$	684		$	642		$	2,172		$	2,118
Net earned premiums	719			705			2,103			2,086
Net investment income	175			82			465			455
Net operating income	114			75			280			273
Net realized investment gains (losses), after tax	9			(21		)	2			(16		)
Net income	123			54			282			257
Other performance metrics:
Loss and loss adjustment expense ratio	62.2		%	60.6		%	64.6		%	66.5		%
Expense ratio	37.1			35.2			36.7			35.4
Dividend ratio	0.5			—			0.4			0.2
Combined ratio	99.8		%	95.8		%	101.7		%	102.1		%
Rate	—		%	1		%	—		%	2		%
Retention	83			76			84			77
New business	$	135		$	135		$	418		$	422

Three Month Comparison

Net written premiums for Commercial increased $42 million for the three months ended September 30, 2016 as compared with the same period in 2015, driven by higher retention and new business in middle markets. The increase in net earned premiums was consistent with the trend in net written premiums.

Net operating income increased $39 million for the three months ended September 30, 2016 as compared with the same period in 2015, due to an increase in net investment income partially offset by higher underwriting expenses and higher net loss and loss adjustment expenses.

The combined ratio increased 4.0 points for the three months ended September 30, 2016 as compared with the same period in 2015. The loss ratio increased 1.6 points due to an increase in the current accident year loss ratio and lower favorable net prior year development. Catastrophe losses were $12 million, or 1.6 points of the loss ratio for the three months ended September 30, 2016, as compared to $10 million, or 1.4 points of the loss ratio for the three months ended September 30, 2015. The expense ratio increased 1.9 points for the three months ended September 30, 2016 as compared with the same period in 2015, primarily due to non-recurring underwriting expenses related to the transition to a new service provider for our IT infrastructure and employee termination costs resulting from the Organization Review. The expense ratio also increased due to higher IT spending primarily related to a new underwriting platform. See the Consolidated Operations section of this MD&A for further discussion of the Organization Review costs.

Favorable net prior year development of $8 million and $16 million was recorded for the three months ended September 30, 2016 and 2015. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

53

Nine Month Comparison

Net written premiums for Commercial increased $54 million for the nine months ended September 30, 2016 as compared with the same period in 2015, driven by higher retention. The increase in net earned premiums was consistent with the trend in net written premiums.

Net operating income increased $7 million for the nine months ended September 30, 2016 as compared with the same period in 2015, due to favorable reserve development partially offset by higher underwriting expenses.

The combined ratio improved 0.4 points for the nine months ended September 30, 2016 as compared with the same period in 2015. The loss ratio improved 1.9 points primarily due to favorable net prior year reserve development. Catastrophe losses were $95 million, or 4.6 points of the loss ratio for the nine months ended September 30, 2016, as compared to $83 million, or 4.0 points of the loss ratio for the nine months ended September 30, 2015. The expense ratio increased 1.3 points for the nine months ended September 30, 2016 as compared with the same period in 2015, primarily due to non-recurring underwriting expenses related to the transition to a new service provider for our IT infrastructure and employee termination costs resulting from the Organization Review. The expense ratio also increased due to higher IT spending primarily related to a new underwriting platform. See the Consolidated Operations section of this MD&A for further discussion of the Organization Review costs.

Favorable net prior year development of $44 million and $17 million was recorded for the nine months ended September 30, 2016 and 2015. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

The following table presents the gross and net carried reserves.

(In millions)	September 30, 2016		December 31, 2015
Gross case reserves	$	4,678	$	4,975
Gross IBNR reserves	4,201		4,208
Total gross carried claim and claim adjustment expense reserves	$	8,879	$	9,183
Net case reserves	$	4,369	$	4,651
Net IBNR reserves	3,910		3,925
Total net carried claim and claim adjustment expense reserves	$	8,279	$	8,576

54

International

The following table presents the results of operations.

Periods ended September 30	Three Months						Nine Months
(In millions, except ratios, rate and retention)	2016			2015			2016			2015
Net written premiums	$	207		$	180		$	637		$	641
Net earned premiums	210			203			605			601
Net investment income	13			13			38			40
Net operating income (loss)	20			9			(1		)	40
Net realized investment gains, after tax	5			—			11			1
Net income	25			9			10			41
Other performance metrics:
Loss and loss adjustment expense ratio	55.4		%	52.4		%	65.2		%	55.9		%
Expense ratio	37.8			38.0			38.2			37.6
Combined ratio	93.2		%	90.4		%	103.4		%	93.5		%
Rate	(1		)%	(1		)%	(1		)%	(1		)%
Retention	70			75			76			77
New business (1)	$	67		$	23		$	189		$	83

(1) Beginning in 2016, new business includes Hardy. New business for Hardy was $40 million and $107 million for the three and nine months ended September 30, 2016.

Three Month Comparison

Net written premiums for International increased $27 million for the three months ended September 30, 2016 as compared with the same period in 2015. Excluding the effect of foreign currency exchange rates and the timing of reinsurance spend, net written premiums for the three months ended September 30, 2016 increased 15%. The majority of the growth came from middle market products in the UK and Continental Europe and from product lines which are now being delivered across all the international platforms, such as healthcare and technology. The increase in net earned premiums was consistent with the trend in net written premiums.

Net operating income increased $11 million for the three months ended September 30, 2016 as compared with the same period in 2015, primarily due to improved net accident year non-catastrophe underwriting results and lower foreign exchange losses partially offset by lower favorable net prior year reserve development.

The combined ratio increased 2.8 points for the three months ended September 30, 2016 as compared with the same period in 2015. The loss ratio increased 3.0 points due to lower favorable net prior year reserve development partially offset by an improved non-catastrophe current accident year loss ratio. Catastrophe losses were $3 million, or 1.5 points of the loss ratio for the three months ended September 30, 2016 as compared to $1 million, or 0.3 points of the loss ratio for the three months ended September 30, 2015. The expense ratio improved 0.2 points for the three months ended September 30, 2016 as compared with the same period in 2015.

Favorable net prior year development of $17 million and $32 million was recorded for the three months ended September 30, 2016 and 2015. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

55

Nine Month Comparison

Net written premiums for International decreased $4 million for the nine months ended September 30, 2016 as compared with the same period in 2015. Net written premiums increased 3.5% as compared to the same period in 2015, after excluding the effect of foreign currency exchange rates. Excluding the effect of premium development, the decrease in net earned premiums was consistent with the trend in net written premiums.

Net operating results decreased $41 million for the nine months ended September 30, 2016 as compared with the same period in 2015, primarily due to a higher level of catastrophe and large losses.

The combined ratio increased 9.9 points for the nine months ended September 30, 2016 as compared with the same period in 2015. The loss ratio increased 9.3 points primarily due to an increase in the current accident year loss ratio driven by catastrophe losses and large losses related to political risk, property and financial institutions. Catastrophe losses were $28 million, or 4.7 points of the loss ratio for the nine months ended September 30, 2016, primarily driven by the Fort McMurray wildfires, as compared to $5 million, or 0.8 points of the loss ratio for the nine months ended September 30, 2015. The expense ratio increased 0.6 points for the nine months ended September 30, 2016 as compared with the same period in 2015, primarily due to higher underwriting expenses.

Favorable net prior year development of $36 million and $30 million was recorded for the nine months ended September 30, 2016 and 2015. Further information on net prior year development is in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

The following table presents the gross and net carried reserves.

(In millions)	September 30, 2016		December 31, 2015
Gross case reserves	$	647	$	622
Gross IBNR reserves	761		725
Total gross carried claim and claim adjustment expense reserves	$	1,408	$	1,347
Net case reserves	$	567	$	531
Net IBNR reserves	718		688
Total net carried claim and claim adjustment expense reserves	$	1,285	$	1,219

Referendum on the United Kingdom's Membership in the European Union

On June 23, 2016, the United Kingdom (U.K.) held a referendum in which voters approved an exit from the European Union (E.U.), commonly referred to as "Brexit". As a result of the referendum, it is currently expected that the British government will formally commence the process to leave the E.U. and begin negotiating the terms of treaties that will govern the U.K.'s future relationship with the E.U. in the first quarter of 2017. Although the terms of any future treaties are unknown, changes in our international operating platform may be required to allow us to continue to write business in the E.U. after the completion of Brexit. As a result of these changes, the complexity and cost of regulatory compliance of our European business is likely to increase.

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Life & Group Non-Core

The following table presents the results of operations.

Periods ended September 30	Three Months					Nine Months
(In millions)	2016		2015			2016		2015
Net earned premiums	$	134	$	137		$	401	$	412
Net investment income	192		182			567		540
Net operating income (loss)	6		(30		)	—		(71		)
Net realized investment gains, after tax	11		2			3		6
Net income (loss)	17		(28		)	3		(65		)

Due to the recognition of the premium deficiency and resetting of actuarial assumptions in the fourth quarter of 2015, the operating results for our long term care business in 2016 now reflect the variance between actual experience and the expected results contemplated in our best estimate reserves. In 2015, results of our long term care business reflected variances between actual experience and actuarial assumptions that were locked-in at policy issuance. As a result of the reserve assumption unlocking, the 2016 and 2015 results are not comparable.

Three Month

The net operating income of $6 million was generally in line with expectations, as the impact of favorable morbidity was partially offset by unfavorable persistency in our long term care business.

Nine Month

Results for the current year nine month period were generally consistent with our reset assumptions.

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Corporate & Other Non-Core

The following table presents the results of operations.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net investment income	$	4		$	1		$	11		$	12
Interest expense	39			39			119			117
Net operating loss	(24		)	(23		)	(162		)	(126		)
Net realized investment gains (losses), after tax	1			1			(2		)	2
Net loss	(23		)	(22		)	(164		)	(124		)

Three Month Comparison

Net operating loss for the three months ended September 30, 2016 was comparable to the same period in 2015.

Nine Month Comparison

Net operating loss increased $36 million for the nine months ended September 30, 2016 as compared with the same period in 2015. Results in both periods were negatively affected by after-tax charges related to the application of retroactive reinsurance accounting to adverse reserve development ceded under the 2010 A&EP Loss Portfolio Transfer. The Loss Portfolio Transfer drove $20 million of the period over period change. This is further discussed in Note E to the Condensed Consolidated Financial Statements included under Part I, Item 1.

The following table presents the gross and net carried reserves.

(In millions)	September 30, 2016		December 31, 2015
Gross case reserves	$	1,581	$	1,521
Gross IBNR reserves	1,119		1,123
Total gross carried claim and claim adjustment expense reserves	$	2,700	$	2,644
Net case reserves	$	99	$	130
Net IBNR reserves	137		153
Total net carried claim and claim adjustment expense reserves	$	236	$	283

58

INVESTMENTS

Net Investment Income

The significant components of Net investment income are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Fixed maturity securities:
Taxable	$	354		$	346		$	1,048		$	1,040
Tax-Exempt	103			103			304			304
Total fixed maturity securities	457			449			1,352			1,344
Limited partnership investments	65			(93		)	97			69
Other, net of investment expense	2			(2		)	12			(1		)
Net investment income	$	524		$	354		$	1,461		$	1,412
Net investment income, after tax	$	371		$	265		$	1,048		$	1,015
Effective income yield for the fixed maturity securities portfolio, pretax	4.8		%	4.8		%	4.8		%	4.8		%
Effective income yield for the fixed maturity securities portfolio, after tax	3.4		%	3.5		%	3.4		%	3.5		%

Net investment income, after tax, for the three months ended September 30, 2016 increased $106 million as compared with the same period in 2015. The increase was driven by limited partnership investments, which returned 2.6% as compared with (3.2)% for the same period in 2015.

Net investment income, after tax, for the nine months ended September 30, 2016 increased $33 million as compared with the same period in 2015. The increase was driven by limited partnership investments, which returned 3.8% as compared with 2.2% in the prior year period.

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Net Realized Investment Gains (Losses)

The components of Net realized investment results are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Fixed maturity securities:
Corporate and other bonds	$	18		$	(27	)	$	10		$	(11	)
States, municipalities and political subdivisions	20			(7		)	23			(27		)
Asset-backed	5			5			5			8
U.S. Treasury and obligations of government-sponsored enterprises	3			—			5			—
Foreign government	1			—			3			1
Total fixed maturity securities	47			(29		)	46			(29		)
Equity securities	(3		)	(18		)	(5		)	(19		)
Derivative financial instruments	1			(1		)	(12		)	9
Short term investments and other	1			(1		)	(3		)	—
Net realized investment gains (losses)	46			(49		)	26			(39		)
Income tax (expense) benefit on net realized investment gains (losses)	(14		)	17			(11		)	21
Net realized investment gains (losses), after tax	$	32		$	(32	)	$	15		$	(18	)

Net realized investment results, after tax, improved $64 million for the three months ended September 30, 2016 as compared with the same period in 2015, driven by higher net realized investment gains on sales of securities reflecting the overall net unrealized gain position within the portfolio and lower OTTI losses recognized in earnings.

Net realized investment results, after tax, improved $33 million for the nine months ended September 30, 2016 as compared with the same period in 2015, driven by higher net realized investment gains on sales of securities reflecting the overall net unrealized gain position within the portfolio and lower OTTI losses recognized in earnings, partially offset by derivative results.

Further information on our realized gains and losses, including our OTTI losses, is set forth in Note C to the Condensed Consolidated Financial Statements included under Part I, Item 1.

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Portfolio Quality

The following table presents the estimated fair value and net unrealized gains (losses) of our fixed maturity securities by rating distribution.

	September 30, 2016				December 31, 2015
(In millions)	Estimated Fair Value		Net Unrealized Gains (Losses)		Estimated Fair Value		Net Unrealized Gains (Losses)
U.S. Government, Government agencies and Government-sponsored enterprises	$	4,422	$	166	$	3,910	$	101
AAA	1,893		180		1,938		123
AA	9,015		1,186		8,919		900
A	10,292		1,283		10,044		904
BBB	13,326		1,098		11,595		307
Non-investment grade	3,373		168		3,166		(16		)
Total	$	42,321	$	4,081	$	39,572	$	2,319

As of September 30, 2016 and December 31, 2015, only 2% and 1% of our fixed maturity portfolio was rated internally.

The following table presents available-for-sale fixed maturity securities in a gross unrealized loss position by ratings distribution.

	September 30, 2016
(In millions)	Estimated Fair Value		Gross Unrealized Losses
U.S. Government, Government agencies and Government-sponsored enterprises	$	62	$	1
AAA	116		2
AA	196		2
A	304		5
BBB	828		18
Non-investment grade	781		34
Total	$	2,287	$	62

The following table presents the maturity profile for these available-for-sale fixed maturity securities. Securities not due to mature on a single date are allocated based on weighted average life.

	September 30, 2016
(In millions)	Estimated Fair Value		Gross Unrealized Losses
Due in one year or less	$	121	$	1
Due after one year through five years	585		13
Due after five years through ten years	999		26
Due after ten years	582		22
Total	$	2,287	$	62

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Duration

A primary objective in the management of the investment portfolio is to optimize return relative to corresponding liabilities and respective liquidity needs. Our views on the current interest rate environment, tax regulations, asset class valuations, specific security issuer and broader industry segment conditions and the domestic and global economic conditions, are some of the factors that enter into an investment decision. We also continually monitor exposure to issuers of securities held and broader industry sector exposures and may from time to time adjust such exposures based on our views of a specific issuer or industry sector.

A further consideration in the management of the investment portfolio is the characteristics of the corresponding liabilities and the ability to align the duration of the portfolio to those liabilities and to meet future liquidity needs, minimize interest rate risk and maintain a level of income sufficient to support the underlying insurance liabilities. For portfolios where future liability cash flows are determinable and typically long term in nature, we segregate investments for asset/liability management purposes. The segregated investments support the long term care and structured settlement liabilities in the Life & Group Non-Core segment.

The effective durations of fixed maturity securities and short term investments are presented in the following table. Amounts presented are net of payable and receivable amounts for securities purchased and sold, but not yet settled.

	September 30, 2016			December 31, 2015
(In millions)	Estimated Fair Value		Effective Duration (In years)	Estimated Fair Value		Effective Duration (In years)
Investments supporting Life & Group Non-Core	$	16,407	8.6	$	14,879	9.6
Other interest sensitive investments	27,239		4.1	26,435		4.3
Total	$	43,646	5.8	$	41,314	6.2

The duration of the total fixed income portfolio is in line with portfolio targets. The duration of the assets supporting the Life and Group Non-Core business has declined, reflective of increases in expected bond call activity in our municipal bond portfolio and the low interest rate environment.

The investment portfolio is periodically analyzed for changes in duration and related price risk. Additionally, we periodically review the sensitivity of the portfolio to the level of foreign exchange rates and other factors that contribute to market price changes. A summary of these risks and specific analysis on changes is included in the Quantitative and Qualitative Disclosures About Market Risk included under Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2015.

Short Term Investments

The carrying values of the components of the Short term investments are presented in the following table.

(In millions)	September 30, 2016		December 31, 2015
Short term investments:
Commercial paper	$	841	$	998
U.S. Treasury securities	374		411
Money market funds	75		60
Other	133		191
Total short term investments	$	1,423	$	1,660

62

LIQUIDITY AND CAPITAL RESOURCES

Cash Flows

Our primary operating cash flow sources are premiums and investment income from our insurance subsidiaries. Our primary operating cash flow uses are payments for claims, policy benefits and operating expenses, including interest expense on corporate debt. Additionally, cash may be paid or received for income taxes.

For the nine months ended September 30, 2016, net cash provided by operating activities was $1,120 million as compared with $1,045 million for the same period in 2015. Cash provided by operating activities reflected increased receipts relating to returns on limited partnerships and lower income taxes paid, partially offset by lower net premiums collected and higher net claim and expense payments.

Cash flows from investing activities include the purchase and disposition of available-for-sale financial instruments and may include the purchase and sale of businesses, land, buildings, equipment and other assets not generally held for resale. The cash flow from investing activities is affected by various factors such as the anticipated payment of claims, financing activity, asset/liability management and individual security buy and sell decisions made in the normal course of portfolio management.

Net cash used by investing activities was $604 million for the nine months ended September 30, 2016, as compared with net cash used of $254 million for the same period in 2015. In the first quarter of 2016, we sold the principal executive offices of CNAF for $107 million.

Cash flows from financing activities may include proceeds from the issuance of debt and equity securities, outflows for stockholder dividends or repayment of debt and outlays to reacquire equity instruments.

For the nine months ended September 30, 2016, net cash used by financing activities was $605 million as compared with $739 million for the same period in 2015. In the first quarter of2016, we issued $500 million of 4.50% senior notes due March 1, 2026 and redeemed the $350 million outstanding aggregate principal balance of our 6.50%senior notes due August 15, 2016.

Common Stock Dividends

Dividends of $2.75 per share of our common stock, including a special dividend of $2.00 per share, were declared and paid during the nine months ended September 30, 2016. On October 28, 2016, our Board of Directors declared a quarterly dividend of $0.25 per share, payable November 30, 2016 to stockholders of record on November 14, 2016. The declaration and payment of future dividends to holders of our common stock will be at the discretion of our Board of Directors and will depend on many factors, including our earnings, financial condition, business needs and regulatory constraints.

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Liquidity

We believe our present cash flows from operating, investing and financing activities are sufficient to fund our current and expected working capital and debt obligation needs and we do not expect this to change in the near term. There are currently no amounts outstanding under our $250 million senior unsecured revolving credit facility and no borrowings outstanding through our membership in the Federal Home Loan Bank of Chicago (FHLBC).

Dividends from CCC are subject to the insurance holding company laws of the State of Illinois, the domiciliary state of CCC. Under these laws, ordinary dividends, or dividends that do not require prior approval by the Illinois Department of Insurance (the Department), are determined based on the greater of the prior year's statutory net income or 10% of statutory surplus as of the end of the prior year, as well as timing and amount of dividends paid in the preceding twelve months. Additionally, ordinary dividends may only be paid from earned surplus, which is calculated by removing unrealized gains from unassigned surplus. As of September 30, 2016 CCC was in a positive earned surplus position. The maximum allowable dividend CCC could pay during 2016 that would not be subject to the Department's prior approval is $1,079 million, less dividends paid during the preceding twelve months measured at that point in time. CCC paid dividends of $100 million during the three months ended December 31, 2015 and $665 million during the nine months ended September 30, 2016. As of September 30, 2016 CCC is able to pay approximately $314 million of dividends that would not be subject to prior approval of the Department. The actual level of dividends paid in any year is determined after an assessment of available dividend capacity, holding company liquidity and cash needs as well as the impact the dividends will have on the statutory surplus of the applicable insurance company.

We have an effective automatic shelf registration statement under which we may issue debt, equity or hybrid securities.

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ACCOUNTING STANDARDS UPDATES

For discussion of Accounting Standards Updates adopted as of January 1, 2016 and that will be adopted in the future, see Note A to the Condensed Consolidated Financial Statements.

FORWARD-LOOKING STATEMENTS

This report contains a number of forward-looking statements which relate to anticipated future events rather than actual present conditions or historical events. These statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and generally include words such as “believes,” “expects,” “intends,” “anticipates,” “estimates,” and similar expressions. Forward-looking statements in this report include any and all statements regarding expected developments in our insurance business, including losses and loss reserves for A&EP and other mass tort claims which are more uncertain, and therefore more difficult to estimate than loss reserves respecting traditional property and casualty exposures; the impact of routine ongoing insurance reserve reviews we are conducting; our expectations concerning our revenues, earnings, expenses and investment activities; volatility in investment returns; expected cost savings and other results from our expense reduction activities; and our proposed actions in response to trends in our business. Forward-looking statements, by their nature, are subject to a variety of inherent risks and uncertainties that could cause actual results to differ materially from the results projected in the forward-looking statement. We cannot control many of these risks and uncertainties. These risks and uncertainties include, but are not limited to, the following:

Company-Specific Factors

• the risks and uncertainties associated with our insurance reserves, as outlined in the Critical Accounting Estimates and the Reserves - Estimates and Uncertainties sections of our Annual Report on Form 10-K, including the sufficiency of the reserves and the possibility for future increases, which would be reflected in the results of operations in the period that the need for such adjustment is determined;

• the risk that the other parties to the transaction in which, subject to certain limitations, we ceded our legacy A&EP liabilities will not fully perform their obligations to CNA, the uncertainty in estimating loss reserves for A&EP liabilities and the possible continued exposure of CNA to liabilities for A&EP claims that are not covered under the terms of the transaction;

• the performance of reinsurance companies under reinsurance contracts with us; and

• the risks and uncertainties associated with potential acquisitions and divestitures, including the consummation of such transactions, the successful integration of acquired operations and the potential for subsequent impairment of goodwill or intangible assets.

Industry and General Market Factors

• the impact of competitive products, policies and pricing and the competitive environment in which we operate, including changes in our book of business;

• product and policy availability and demand and market responses, including the level of ability to obtain rate increases and decline or non-renew underpriced accounts, to achieve premium targets and profitability and to realize growth and retention estimates;

• general economic and business conditions, including recessionary conditions that may decrease the size and number of our insurance customers and create additional losses to our lines of business, especially those that provide management and professional liability insurance, as well as surety bonds, to businesses engaged in real estate, financial services and professional services and inflationary pressures on medical care costs, construction costs and other economic sectors that increase the severity of claims;

• conditions in the capital and credit markets, including continuing uncertainty and instability in these markets, as well as the overall economy, and their impact on the returns, types, liquidity and valuation of our investments;

• conditions in the capital and credit markets that may limit our ability to raise significant amounts of capital on favorable terms; and

• the possibility of changes in our ratings by ratings agencies, including the inability to access certain markets or distribution channels and the required collateralization of future payment obligations as a result of such changes, and changes in rating agency policies and practices.

65

Regulatory Factors

• regulatory initiatives and compliance with governmental regulations, judicial interpretations within the regulatory framework, including interpretation of policy provisions, decisions regarding coverage and theories of liability, legislative actions that increase claimant activity, trends in litigation and the outcome of any litigation involving us and rulings and changes in tax laws and regulations;

• regulatory limitations, impositions and restrictions upon us, including with respect to our ability to increase premium rates, and the effects of assessments and other surcharges for guaranty funds and second-injury funds, other mandatory pooling arrangements and future assessments levied on insurance companies; and

• regulatory limitations and restrictions, including limitations upon our ability to receive dividends from our insurance subsidiaries, imposed by regulatory authorities, including regulatory capital adequacy standards.

Impact of Catastrophic Events and Related Developments

• weather and other natural physical events, including the severity and frequency of storms, hail, snowfall and other winter conditions, natural disasters such as hurricanes and earthquakes, as well as climate change, including effects on global weather patterns, greenhouse gases, sea, land and air temperatures, sea levels, rain, hail and snow;

• regulatory requirements imposed by coastal state regulators in the wake of hurricanes or other natural disasters, including limitations on the ability to exit markets or to non-renew, cancel or change terms and conditions in policies, as well as mandatory assessments to fund any shortfalls arising from the inability of quasi-governmental insurers to pay claims;

• man-made disasters, including the possible occurrence of terrorist attacks, the unpredictability of the nature, targets, severity or frequency of such events, and the effect of the absence or insufficiency of applicable terrorism legislation on coverages; and

• the occurrence of epidemics.

Referendum on the United Kingdom's Membership in the European Union

• on June 23, 2016, the United Kingdom (U.K.) held a referendum in which voters approved an exit from the European Union (E.U.), commonly referred to as "Brexit". As a result of the referendum, it is currently expected that the British government will formally commence the process to leave the E.U. and begin negotiating the terms of treaties that will govern the U.K.'s future relationship with the E.U. in the first quarter of 2017. Although the terms of any future treaties are unknown, changes in our international operating platform may be required to allow us to continue to write business in the E.U. after the completion of Brexit. As a result of these changes, the complexity and cost of regulatory compliance of our European business is likely to increase.

Our forward-looking statements speak only as of the date on which they are made and we do not undertake any obligation to update or revise any forward-looking statement to reflect events or circumstances after the date of the statement, even if our expectations or any related events or circumstances change.

66

Item 3. Quantitative and Qualitative Disclosures About Market Risk

There were no material changes in our market risk components for the nine months ended September 30, 2016. See the Quantitative and Qualitative Disclosures About Market Risk included in Item 7A on our Annual Report on Form 10-K filed with the Securities and Exchange Commission for the year ended December 31, 2015 for further information. Additional information related to portfolio duration is discussed in the Investments section of our Management’s Discussion and Analysis of Financial Condition and Results of Operations included in Part I, Item 2.

Item 4. Controls and Procedures

The Company maintains a system of disclosure controls and procedures which are designed to ensure that information required to be disclosed by the Company in reports that it files or submits to the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including this report, is recorded, processed, summarized and reported on a timely basis. These disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed under the Exchange Act is accumulated and communicated to the Company's management on a timely basis to allow decisions regarding required disclosure.

As of September 30, 2016, the Company's management, including the Company's Chief Executive Officer (CEO) and Chief Financial Officer (CFO), conducted an evaluation of the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Exchange Act Rules 13a-15(e) and 15d-15(e)). Based on this evaluation, the CEO and CFO have concluded that the Company's disclosure controls and procedures are effective as of September 30, 2016.

There has been no change in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the quarter ended September 30, 2016 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

67

PART II. Other Information

Item 1. Legal Proceedings

Information on our legal proceedings is set forth in Note F to the Condensed Consolidated Financial Statements included under Part I, Item 1.

Item 6. Exhibits

See Exhibit Index.

68

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		CNA Financial Corporation
Dated: October 31, 2016	By	/s/ D. Craig Mense
		D. Craig Mense Executive Vice President and Chief Financial Officer

69

EXHIBIT INDEX

Description of Exhibit	Exhibit Number
Certification of Chief Executive Officer	31.1
Certification of Chief Financial Officer	31.2
Written Statement of the Chief Executive Officer of CNA Financial Corporation Pursuant to 18 U.S.C. Section 1350 (As adopted by Section 906 of the Sarbanes-Oxley Act of 2002)	32.1
Written Statement of the Chief Financial Officer of CNA Financial Corporation Pursuant to 18 U.S.C. Section 1350 (As adopted by Section 906 of the Sarbanes-Oxley Act of 2002)	32.2
XBRL Instance Document	101.INS
XBRL Taxonomy Extension Schema	101.SCH
XBRL Taxonomy Extension Calculation Linkbase	101.CAL
XBRL Taxonomy Extension Definition Linkbase	101.DEF
XBRL Taxonomy Label Linkbase	101.LAB
XBRL Taxonomy Extension Presentation Linkbase	101.PRE

70

EX-31.1

EXHIBIT 31.1

SARBANES-OXLEY ACT SECTION 302

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Thomas F. Motamed, certify that:

1. I have reviewed this quarterly report on Form 10-Q of CNA Financial Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth quarter in the case of an Annual Report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	October 31, 2016	By	/s/ Thomas F. Motamed
			Thomas F. Motamed
			Chief Executive Officer

EX-31.2

EXHIBIT 31.2

SARBANES-OXLEY ACT SECTION 302

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, D. Craig Mense, certify that:

1. I have reviewed this quarterly report on Form 10-Q of CNA Financial Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth quarter in the case of an Annual Report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	October 31, 2016	By	/s/ D. Craig Mense
			D. Craig Mense
			Chief Financial Officer

EX-32.1

EXHIBIT 32.1

Written Statement of the Chief Executive Officer

of CNA Financial Corporation

Pursuant to 18 U.S.C. § 1350

(As adopted by Section 906 of the Sarbanes-Oxley Act of 2002)

The undersigned, the Chief Executive Officer of CNA Financial Corporation (the Company), hereby certifies that, to his knowledge:

• the Company’s quarterly report on Form 10-Q for the quarter ended September 30, 2016 filed on the date hereof with the Securities and Exchange Commission (the Report) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

• the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	October 31, 2016	By	/s/ Thomas F. Motamed
			Thomas F. Motamed
			Chief Executive Officer

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Report or as a separate disclosure document.

EX-32.2

EXHIBIT 32.2

Written Statement of the Chief Financial Officer

of CNA Financial Corporation

Pursuant to 18 U.S.C. § 1350

(As adopted by Section 906 of the Sarbanes-Oxley Act of 2002)

The undersigned, the Chief Financial Officer of CNA Financial Corporation (the Company), hereby certifies that, to his knowledge:

• the Company’s quarterly report on Form 10-Q for the quarter ended September 30, 2016 filed on the date hereof with the Securities and Exchange Commission (the Report) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

• the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	October 31, 2016	By	/s/ D. Craig Mense
			D. Craig Mense
			Chief Financial Officer

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Report or as a separate disclosure document.

XML

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2016	Oct. 27, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	CNA FINANCIAL CORP
Entity Central Index Key	0000021175
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		270,489,350

XML

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Net earned premiums	$ 1,767	$ 1,751	$ 5,196	$ 5,173
Net investment income	524	354	1,461	1,412
Net realized investment gains (losses):
Other-than-temporary impairment losses	(18)	(56)	(56)	(99)
Other net realized investment (losses) gains	64	7	82	60
Net realized investment gains (losses)	46	(49)	26	(39)
Other revenues	96	97	293	286
Total revenues	2,433	2,153	6,976	6,832
Claims, Benefits and Expenses
Insurance claims and policyholders' benefits	1,202	1,200	3,949	4,008
Amortization of deferred acquisition costs	314	319	926	936
Other operating expenses	403	362	1,162	1,061
Interest	39	39	119	117
Total claims, benefits and expenses	1,958	1,920	6,156	6,122
Income (loss) from continuing operations before income tax	475	233	820	710
Income tax benefit (expense)	(132)	(55)	(202)	(161)
Net Income (Loss)	$ 343	$ 178	$ 618	$ 549
Earnings Per Share, Basic	$ 1.27	$ 0.66	$ 2.28	$ 2.03
Earnings Per Share, Diluted	1.26	0.66	2.28	2.03
Dividends declared per share	$ 0.25	$ 0.25	$ 2.75	$ 2.75
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	270.5	270.3	270.4	270.2
Diluted	271.2	270.8	271.0	270.7

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 343	$ 178	$ 618	$ 549
Other Comprehensive Income (Loss), Net of Tax, Changes In:
Net unrealized gains (losses) on investments with other-than-temporary impairments	3	2	7	(3)
Net unrealized gains (losses) on other investments	42	(36)	586	(289)
Net unrealized gains (losses) on investments	45	(34)	593	(292)
Foreign currency translation adjustment	(24)	(53)	(58)	(100)
Pension and postretirement benefits	6	4	17	52
Other comprehensive income (loss), net of tax	27	(83)	552	(340)
Total comprehensive income (loss)	$ 370	$ 95	$ 1,170	$ 209

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Assets
Fixed maturity securities at fair value (amortized cost of $38,240 and $37,253)	$ 42,321	$ 39,572
Equity securities at fair value (cost of $108 and $191)	116	197
Limited partnership investments	2,456	2,548
Other invested assets	35	44
Mortgage loans	629	678
Short term investments	1,423	1,660
Total investments	46,980	44,699
Cash	290	387
Reinsurance receivables (less allowance for uncollectible receivables of $37 and $38)	4,577	4,453
Insurance receivables (less allowance for uncollectible receivables of $46 and $51)	2,235	2,078
Accrued investment income	434	404
Deferred acquisition costs	619	598
Deferred income taxes	221	638
Property and equipment at cost (less accumulated depreciation of $236 and $382)	287	343
Goodwill	146	150
Other assets	1,070	1,295
Total assets	56,859	55,045
Liabilities
Claim and claim adjustment expenses	22,672	22,663
Unearned premiums	3,862	3,671
Future policy benefits	11,219	10,152
Short term debt	0	350
Long term debt	2,709	2,210
Other liabilities (includes $87 and $82 due to Loews Corporation)	4,202	4,243
Total liabilities	44,664	43,289
Stockholders' Equity
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 273,489,350 and 270,274,361 shares outstanding)	683	683
Additional paid-in capital	2,163	2,153
Retained earnings	9,185	9,313
Accumulated other comprehensive income (loss)	237	(315)
Treasury stock (2,550,893 and 2,765,882 shares), at cost	(73)	(78)
Total stockholders’ equity	12,195	11,756
Total liabilities and stockholders' equity	$ 56,859	$ 55,045

XML

Consolidated Balance Sheet Parentheticals (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Fixed maturities securities at amortized cost	$ 38,240	$ 37,253
Equity securities at cost	108	191
Allowance for uncollectible reinsurance receivables	37	38
Allowance for uncollectible insurance receivables	46	51
Accumulated depreciation on property and equipment	236	382
Due to Parent Company	$ 87	$ 82
Common stock, par value	$ 2.50	$ 2.50
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	273,040,243	273,040,243
Common stock, shares outstanding	270,489,350	270,274,361
Treasury stock, shares	2,550,893	2,765,882

XML

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities
Net Income (Loss)	$ 618	$ 549
Adjustments to reconcile net income (loss) to net cash flows provided (used) by operating activities:
Deferred income tax expense (benefit)	112	27
Trading portfolio activity	0	17
Realized Investment Gains (Losses)	(26)	39
Equity method investees	265	127
Amortization of investments	(17)	(17)
Depreciation and amortization	57	62
Changes in:
Receivables, net	(311)	70
Accrued investment income	(30)	(34)
Deferred acquisition costs	(24)	11
Insurance reserves	464	195
Other assets	(96)	(61)
Other liabilities	61	(32)
Other, net	47	92
Total adjustments	502	496
Net cash flows provided (used) by operating activities	1,120	1,045
Dispositions:
Fixed maturity securities - sales	4,234	3,590
Fixed maturity securities - maturities, calls and redemptions	2,263	3,101
Equity securities	79	43
Limited partnerships	200	156
Mortgage loans	137	22
Purchases:
Fixed maturity securities	(7,472)	(7,055)
Equity securities	(1)	(60)
Limited partnerships	(222)	(120)
Mortgage loans	(88)	(81)
Change in other investments	10	5
Change in short term investments	241	222
Purchases of property and equipment	(94)	(84)
Disposals of property and equipment	107	0
Other, net	2	7
Net cash flows provided (used) by investing activities	(604)	(254)
Cash Flows from Financing Activities
Dividends paid to common stockholders	(746)	(744)
Proceeds from the issuance of debt	498	0
Repayment of debt	(358)	0
Other, net	1	5
Net cash flows provided (used) by financing activities	(605)	(739)
Effect of foreign exchange rate changes on cash	(8)	(6)
Net change in cash	(97)	46
Cash, beginning of year	387	190
Cash, end of period	$ 290	$ 236

XML

Consolidated Statements of Stockholders' Equity $ in Millions	USD ($)
Balance, beginning of year at Dec. 31, 2014	$ 683
Balance, end of period at Sep. 30, 2015	683
Balance, beginning of year at Dec. 31, 2014	2,151
Additional Paid-In Capital
Stock-based compensation	(1)
Balance, end of period at Sep. 30, 2015	2,150
Balance, beginning of year at Dec. 31, 2014	9,645
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(744)
Net Income (Loss)	549
Balance, end of period at Sep. 30, 2015	9,450
Accumulated other comprehensive income (loss), beginning balance at Dec. 31, 2014	400
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	(340)
Accumulated other comprehensive income (loss), ending balance at Sep. 30, 2015	60
Balance, beginning of year at Dec. 31, 2014	(84)
Treasury Stock
Stock Based Compensation and Other	6
Balance, end of period at Sep. 30, 2015	(78)
Balance, beginning of year at Dec. 31, 2014	(1)
Notes Receivable for the Issuance of Common Stock
Decrease (increase) in notes receivable for common stock	1
Balance, end of period at Sep. 30, 2015	0
Balance, end of period at Sep. 30, 2015	683
Balance, end of period at Sep. 30, 2015	2,150
Retained Earnings (Accumulated Deficit)
Net Income (Loss)	178
Balance, end of period at Sep. 30, 2015	9,450
Accumulated other comprehensive income (loss), beginning balance at Jun. 30, 2015	143
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	(83)
Accumulated other comprehensive income (loss), ending balance at Sep. 30, 2015	60
Balance, end of period at Sep. 30, 2015	(78)
Balance, end of period at Sep. 30, 2015	0
Notes Receivable for the Issuance of Common Stock
Total stockholder's equity	12,265
Total stockholder's equity	11,756
Balance, beginning of year at Dec. 31, 2015	683
Balance, end of period at Sep. 30, 2016	683
Balance, beginning of year at Dec. 31, 2015	2,153
Additional Paid-In Capital
Stock-based compensation	10
Balance, end of period at Sep. 30, 2016	2,163
Balance, beginning of year at Dec. 31, 2015	9,313
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(746)
Net Income (Loss)	618
Balance, end of period at Sep. 30, 2016	9,185
Accumulated other comprehensive income (loss), beginning balance at Dec. 31, 2015	(315)
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	552
Accumulated other comprehensive income (loss), ending balance at Sep. 30, 2016	237
Balance, beginning of year at Dec. 31, 2015	(78)
Treasury Stock
Stock Based Compensation and Other	5
Balance, end of period at Sep. 30, 2016	(73)
Balance, beginning of year at Dec. 31, 2015	0
Notes Receivable for the Issuance of Common Stock
Decrease (increase) in notes receivable for common stock	0
Balance, end of period at Sep. 30, 2016	0
Balance, end of period at Sep. 30, 2016	683
Balance, end of period at Sep. 30, 2016	2,163
Retained Earnings (Accumulated Deficit)
Net Income (Loss)	343
Balance, end of period at Sep. 30, 2016	9,185
Accumulated other comprehensive income (loss), beginning balance at Jun. 30, 2016	210
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)	27
Accumulated other comprehensive income (loss), ending balance at Sep. 30, 2016	237
Balance, end of period at Sep. 30, 2016	(73)
Balance, end of period at Sep. 30, 2016	0
Notes Receivable for the Issuance of Common Stock
Total stockholder's equity	$ 12,195

XML

General

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]

Note A. General

Basis of Presentation

The Condensed Consolidated Financial Statements include the accounts of CNA Financial Corporation (CNAF) and its subsidiaries. Collectively, CNAF and its subsidiaries are referred to as CNA or the Company. Loews Corporation (Loews) owned approximately 90% of the outstanding common stock of CNAF as of September 30, 2016.

The accompanying Condensed Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). Intercompany amounts have been eliminated. Certain financial information that is normally included in annual financial statements, including certain financial statement notes, prepared in accordance with GAAP, is not required for interim reporting purposes and has been condensed or omitted. These statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in CNAF's Annual Report on Form 10-K filed with the Securities and Exchange Commission for the year ended December 31, 2015, including the summary of significant accounting policies in Note A. The preparation of Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Condensed Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates.

The interim financial data as of September 30, 2016 and for the three and nine months endedSeptember 30, 2016 and 2015 is unaudited. However, in the opinion of management, the interim data includes all adjustments, including normal recurring adjustments, necessary for a fair statement of the Company's results for the interim periods. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year.

Recently Adopted Accounting Standards Updates (ASU)

In April 2015, the Financial Accounting Standards Board (FASB) issued ASU No. 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The updated accounting guidance requires debt issuance costs to be presented as a deduction from the corresponding debt liability instead of the historical presentation as an unamortized debt issuance asset. As of January 1, 2016, the Company adopted the updated accounting guidance retrospectively. The Company adjusted its previously reported financial information included herein to reflect the change in accounting guidance for debt issuance costs. The impacts of adopting the new accounting standard on the Company’s Consolidated Balance Sheet as of December 31, 2015, were a decrease in Other assets and a decrease in Long term debt of $2 million.

In May 2015, the FASB issued ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). The updated accounting guidance removes the requirement to categorize assets measured at fair value utilizing the net asset value per share (or equivalent) practical expedient within the fair value hierarchy. As of January 1, 2016, the Company adopted the updated accounting guidance retrospectively. The Company adjusted its previously reported financial information included herein to reflect the change in accounting guidance for assets measured using the net asset value. The impact of adopting the new accounting standard resulted in excluding overseas deposits of $30 million and $27 million from the fair value level disclosure as of September 30, 2016 and December 31, 2015.

Accounting Standards Pending Adoption

In May 2015, the FASB issued ASU No. 2015-09, Financial Services-Insurance (Topic 944): Disclosures about

Short-Duration Contracts. The updated accounting guidance requires enhanced disclosures to provide additional information about insurance liabilities for short-duration contracts. The guidance is effective for annual periods beginning after December 15, 2015, and interim periods within the annual periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on the Company's financial statement disclosures, but expects to provide additional incurred and paid claims development information by accident year, quantitative information about claim frequency and the history of claims duration for significant lines of business within the Company’s annual financial statements.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The updated accounting guidance requires changes to the reporting model for financial instruments. The guidance is effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on the Company's financial statements, and expects the primary change for the Company to be the requirement for equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842): Accounting for Leases. The updated accounting guidance requires lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by all leases, including those historically accounted for as operating leases. The guidance is effective for interim and annual periods beginning after December 15, 2018. The Company is currently evaluating the effect the updated guidance will have on the Company's financial statements. It is expected that assets and liabilities will increase based on the present value of remaining lease payments for leases in place at the adoption date, however, this is not expected to be material to the Company's results of operations or financial position.

In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The updated accounting guidance simplifies the accounting for share-based payment award transactions including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The guidance is effective for annual and interim periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on the Company’s financial statements, but anticipates the primary change to be the recognition of excess tax benefits or deficiencies on vesting or settlement of awards as an income tax benefit or expense, respectively, within net income and the related cash flows classified within operating activities.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The updated accounting guidance requires changes to the recognition of credit losses on financial instruments not accounted for at fair value through net income. The guidance is effective for interim and annual periods beginning after December 15, 2019. The Company is currently evaluating the effect the guidance will have on the Company's financial statements, but expects the primary changes to be the use of the expected credit loss model for its mortgage loan portfolio and reinsurance receivables and the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses if the estimate of credit losses declines.

XML

Earnings Per Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note B. Earnings Per Share

Earnings per share is based on the weighted average number of outstanding common shares. Basic earnings (loss) per share excludes the effect of dilutive securities and is computed by dividing Net income (loss) by the weighted average number of common shares outstanding for the period. Diluted earnings (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock.

For the three and nine months endedSeptember 30, 2016, approximately 707 thousand and 549 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were included in the calculation of diluted earnings per share. For those same periods, approximately 175 thousand and 178 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were not included in the calculation of diluted earnings per share because the effect would have been antidilutive.

For the three and nine months endedSeptember 30, 2015, approximately 514 thousand and 545 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were included in the calculation of diluted earnings per share. For those same periods, approximately 106 thousand and 107 thousand potential shares attributable to exercises or conversions into common stock under stock-based employee compensation plans were not included in the calculation of diluted earnings per share because the effect would have been antidilutive.

XML

Investments

9 Months Ended

Sep. 30, 2016

Investments [Abstract]

Investments

Note C. Investments

The significant components of Net investment income are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Fixed maturity securities	$	457		$	449		$	1,352		$	1,344
Equity securities	1			3			8			9
Limited partnership investments	65			(93		)	97			69
Mortgage loans	8			8			30			25
Short term investments	2			2			6			4
Trading portfolio	1			1			7			6
Other	4			1			4			1
Gross investment income	538			371			1,504			1,458
Investment expense	(14		)	(17		)	(43		)	(46		)
Net investment income	$	524		$	354		$	1,461		$	1,412

Net realized investment gains (losses) are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net realized investment gains (losses):
Fixed maturity securities:
Gross realized gains	$	67		$	22		$	152		$	91
Gross realized losses	(20		)	(51		)	(106		)	(120		)
Net realized investment gains (losses) on fixed maturity securities	47			(29		)	46			(29		)
Equity securities:
Gross realized gains	1			1			5			2
Gross realized losses	(4		)	(19		)	(10		)	(21		)
Net realized investment gains (losses) on equity securities	(3		)	(18		)	(5		)	(19		)
Derivative financial instruments	1			(1		)	(12		)	9
Short term investments and other	1			(1		)	(3		)	—
Net realized investment gains (losses)	$	46		$	(49	)	$	26		$	(39	)

Net realized investment losses for the nine months ended September 30, 2016 include $8 million related to the first quarter 2016 redemption of the Company's $350 million senior notes due August 2016.

The components of Net other-than-temporary impairment (OTTI) losses recognized in earnings by asset type are presented in the following table.

Periods ended September 30	Three Months				Nine Months
(In millions)	2016		2015		2016		2015
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	14	$	36	$	43	$	52
States, municipalities and political subdivisions	—		—		—		18
Asset-backed:
Residential mortgage-backed	—		1		1		7
Other asset-backed	—		—		3		1
Total asset-backed	—		1		4		8
Total fixed maturity securities available-for-sale	14		37		47		78
Equity securities available-for-sale -- Common stock	4		19		9		20
Short term investments	—		—		—		1
OTTI losses recognized in earnings	$	18	$	56	$	56	$	99

The following tables present a summary of fixed maturity and equity securities.

September 30, 2016	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Unrealized OTTI Losses (Gains)
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	17,985	$	1,867	$	36	$	19,816	$	(1	)
States, municipalities and political subdivisions	11,566		1,937		2		13,501		(27		)
Asset-backed:
Residential mortgage-backed	5,174		206		15		5,365		(24		)
Commercial mortgage-backed	2,064		88		8		2,144		—
Other asset-backed	948		12		1		959		—
Total asset-backed	8,186		306		24		8,468		(24		)
U.S. Treasury and obligations of government-sponsored enterprises	68		8		—		76		—
Foreign government	415		23		—		438		—
Redeemable preferred stock	18		2		—		20		—
Total fixed maturity securities available-for-sale	38,238		4,143		62		42,319		$	(52	)
Total fixed maturity securities trading	2						2
Equity securities available-for-sale:
Common stock	15		6		1		20
Preferred stock	93		5		2		96
Total equity securities available-for-sale	108		11		3		116
Total	$	38,348	$	4,154	$	65	$	42,437

December 31, 2015	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Unrealized OTTI Losses (Gains)
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	17,080	$	1,019	$	342	$	17,757	$	—
States, municipalities and political subdivisions	11,729		1,453		8		13,174		(4		)
Asset-backed:
Residential mortgage-backed	4,935		154		17		5,072		(37		)
Commercial mortgage-backed	2,154		55		12		2,197		—
Other asset-backed	923		6		8		921		—
Total asset-backed	8,012		215		37		8,190		(37		)
U.S. Treasury and obligations of government-sponsored enterprises	62		5		—		67		—
Foreign government	334		13		1		346		—
Redeemable preferred stock	33		2		—		35		—
Total fixed maturity securities available-for-sale	37,250		2,707		388		39,569		$	(41	)
Total fixed maturity securities trading	3						3
Equity securities available-for-sale:
Common stock	46		3		1		48
Preferred stock	145		7		3		149
Total equity securities available-for-sale	191		10		4		197
Total	$	37,444	$	2,717	$	392	$	39,769

The net unrealized gains on investments included in the tables above are recorded as a component of Accumulated other comprehensive income (AOCI). When presented in AOCI, these amounts are net of tax and any required Shadow Adjustments. To the extent that unrealized gains on fixed income securities supporting certain products within the Life & Group Non-Core segment would result in a premium deficiency if realized, a related increase in Insurance reserves is recorded, net of tax, as a reduction of net unrealized gains through Other comprehensive income (loss) (Shadow Adjustments). As of September 30, 2016 and December 31, 2015, the net unrealized gains on investments included in AOCI were correspondingly reduced by Shadow Adjustments of $1,681 million and $1,111 million.

The following tables present the estimated fair value and gross unrealized losses of fixed maturity and equity securities in a gross unrealized loss position by the length of time in which the securities have continuously been in that position.

	Less than 12 Months				12 Months or Longer				Total
September 30, 2016	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	617	$	10	$	338	$	26	$	955	$	36
States, municipalities and political subdivisions	163		2		9		—		172		2
Asset-backed:
Residential mortgage-backed	273		6		212		9		485		15
Commercial mortgage-backed	391		7		96		1		487		8
Other asset-backed	153		1		17		—		170		1
Total asset-backed	817		14		325		10		1,142		24
U.S. Treasury and obligations of government-sponsored enterprises	2		—		—		—		2		—
Foreign government	16		—		—		—		16		—
Total fixed maturity securities available-for-sale	1,615		26		672		36		2,287		62
Equity securities available-for-sale:
Common stock	—		1		—		—		—		1
Preferred stock	15		2		—		—		15		2
Total equity securities available-for-sale	15		3		—		—		15		3
Total	$	1,630	$	29	$	672	$	36	$	2,302	$	65

	Less than 12 Months				12 Months or Longer				Total
December 31, 2015	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	4,882	$	302	$	162	$	40	$	5,044	$	342
States, municipalities and political subdivisions	338		8		75		—		413		8
Asset-backed:
Residential mortgage-backed	963		9		164		8		1,127		17
Commercial mortgage-backed	652		10		96		2		748		12
Other asset-backed	552		8		5		—		557		8
Total asset-backed	2,167		27		265		10		2,432		37
U.S. Treasury and obligations of government-sponsored enterprises	4		—		—		—		4		—
Foreign government	54		1		—		—		54		1
Redeemable preferred stock	3		—		—		—		3		—
Total fixed maturity securities available-for-sale	7,448		338		502		50		7,950		388
Equity securities available-for-sale:
Common stock	3		1		—		—		3		1
Preferred stock	13		3		—		—		13		3
Total equity securities available-for-sale	16		4		—		—		16		4
Total	$	7,464	$	342	$	502	$	50	$	7,966	$	392

Based on current facts and circumstances, the Company believes the unrealized losses presented in the September 30, 2016 table above are not indicative of the ultimate collectibility of the current amortized cost of the securities, but rather are attributable to changes in interest rates, credit spreads and other factors. The Company has no current intent to sell securities with unrealized losses, nor is it more likely than not that it will be required to sell prior to recovery of amortized cost; accordingly, the Company has determined that there are no additional OTTI losses to be recorded as of September 30, 2016.

The following table presents the activity related to the pretax credit loss component reflected in Retained earnings on fixed maturity securities still held as of September 30, 2016 and 2015 for which a portion of an OTTI loss was recognized in Other comprehensive income (loss).

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Beginning balance of credit losses on fixed maturity securities	$	41		$	59		$	53		$	62
Reductions for securities sold during the period	(2		)	(2		)	(14		)	(5		)
Reductions for securities the Company intends to sell or more likely than not will be required to sell	(1		)	—			(1		)	—
Ending balance of credit losses on fixed maturity securities	$	38		$	57		$	38		$	57

Contractual Maturity

The following table presents available-for-sale fixed maturity securities by contractual maturity.

	September 30, 2016				December 31, 2015
(In millions)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	1,665	$	1,710	$	1,574	$	1,595
Due after one year through five years	9,052		9,584		7,721		8,070
Due after five years through ten years	14,659		15,625		14,652		14,915
Due after ten years	12,862		15,400		13,303		14,989
Total	$	38,238	$	42,319	$	37,250	$	39,569

Actual maturities may differ from contractual maturities because certain securities may be called or prepaid. Securities not due at a single date are allocated based on weighted average life.

Derivative Financial Instruments

The Company holds an embedded derivative on funds withheld liability with a notional value of $175 million and $179 million as of September 30, 2016 and December 31, 2015 and a fair value of $8 million and $(5) million as of September 30, 2016 and December 31, 2015. The embedded derivative on funds withheld liability is accounted for separately and reported with the funds withheld liability in Other liabilities on the Condensed Consolidated Balance Sheets.

Investment Commitments

As of September 30, 2016, the Company had committed approximately $393 million to future capital calls from various third-party limited partnership investments in exchange for an ownership interest in the related partnerships.

As of September 30, 2016, the Company had mortgage loan commitments of $40 million representing signed loan applications received and accepted.

The Company invests in various privately placed debt securities, including bank loans, as part of its overall investment strategy and has committed to additional future purchases, sales and funding. Purchases and sales of privately placed debt securities are recorded once funded. As of September 30, 2016, the Company had commitments to purchase or fund additional amounts of $205 million and sell $163 million under the terms of such securities.

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Fair Value

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value

Note D. Fair Value

Fair value is the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following fair value hierarchy is used in selecting inputs, with the highest priority given to Level 1, as these are the most transparent or reliable.

Level 1 - Quoted prices for identical instruments in active markets.

Level 2 - Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets.

Level 3 - Valuations derived from valuation techniques in which one or more significant inputs are not observable.

Prices may fall within Level 1, 2 or 3 depending upon the methodology and inputs used to estimate fair value for each specific security. In general the Company seeks to price securities using third-party pricing services. Securities not priced by pricing services are submitted to independent brokers for valuation and, if those are not available, internally developed pricing models are used to value assets using a methodology and inputs the Company believes market participants would use to value the assets. Prices obtained from third-party pricing services or brokers are not adjusted by the Company.

The Company performs control procedures over information obtained from pricing services and brokers to ensure prices received represent a reasonable estimate of fair value and to confirm representations regarding whether inputs are observable or unobservable. Procedures include i) the review of pricing service or broker pricing methodologies, ii) back-testing, where past fair value estimates are compared to actual transactions executed in the market on similar dates, iii) exception reporting, where period-over-period changes in price are reviewed and challenged with the pricing service or broker based on exception criteria, iv) deep dives, where the Company performs an independent analysis of the inputs and assumptions used to price individual securities and v) pricing validation, where prices received are compared to prices independently estimated by the Company.

Assets and Liabilities Measured at Fair Value

Assets and liabilities measured at fair value on a recurring basis are presented in the following tables.

September 30, 2016							Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2		Level 3
Assets
Fixed maturity securities:
Corporate and other bonds	$	—	$	19,557	$	261	$	19,818
States, municipalities and political subdivisions	—		13,500		1		13,501
Asset-backed:
Residential mortgage-backed	—		5,286		79		5,365
Commercial mortgage-backed	—		2,120		24		2,144
Other asset-backed	—		916		43		959
Total asset-backed	—		8,322		146		8,468
U.S. Treasury and obligations of government-sponsored enterprises	76		—		—		76
Foreign government	—		438		—		438
Redeemable preferred stock	20		—		—		20
Total fixed maturity securities	96		41,817		408		42,321
Equity securities	97		—		19		116
Other invested assets	—		5		—		5
Short term investments	432		911		—		1,343
Life settlement contracts, included in Other assets	—		—		67		67
Total assets	$	625	$	42,733	$	494	$	43,852
Liabilities
Other liabilities	$	—	$	8	$	—	$	8
Total liabilities	$	—	$	8	$	—	$	8

December 31, 2015								Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2			Level 3
Assets
Fixed maturity securities:
Corporate and other bonds	$	—	$	17,592		$	168	$	17,760
States, municipalities and political subdivisions	—		13,172			2		13,174
Asset-backed:
Residential mortgage-backed	—		4,938			134		5,072
Commercial mortgage-backed	—		2,175			22		2,197
Other asset-backed	—		868			53		921
Total asset-backed	—		7,981			209		8,190
U.S. Treasury and obligations of government-sponsored enterprises	66		1			—		67
Foreign government	—		346			—		346
Redeemable preferred stock	35		—			—		35
Total fixed maturity securities	101		39,092			379		39,572
Equity securities	177		—			20		197
Other invested assets	—		17			—		17
Short term investments	448		1,134			—		1,582
Life settlement contracts, included in Other assets	—		—			74		74
Total assets	$	726	$	40,243		$	473	$	41,442
Liabilities
Other liabilities	$	—	$	(5	)	$	—	$	(5	)
Total liabilities	$	—	$	(5	)	$	—	$	(5	)

The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).

Level 3 (In millions)	Balance as of July 1, 2016		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales		Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2016		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2016 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	242	$	1		$	7		$	16	$	—	$	(5	)	$	—	$	—		$	261	$	—
States, municipalities and political subdivisions	2		—			—			—		—		(1		)	—		—			1		—
Asset-backed:
Residential mortgage-backed	134		—			(1		)	5		—		(1		)	—		(58		)	79		—
Commercial mortgage-backed	11		—			—			23		—		(8		)	—		(2		)	24		—
Other asset-backed	45		—			—			34		—		—			—		(36		)	43		—
Total asset-backed	190		—			(1		)	62		—		(9		)	—		(96		)	146		—
Total fixed maturity securities	434		1			6			78		—		(15		)	—		(96		)	408		—
Equity securities	19		(1		)	1			—		—		—			—		—			19		(2		)
Life settlement contracts	67		—			—			—		—		—			—		—			67		—
Total	$	520	$	—		$	7		$	78	$	—	$	(15	)	$	—	$	(96	)	$	494	$	(2	)

Level 3 (In millions)	Balance as of July 1, 2015		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*		Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2015		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2015 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	141	$	—	$	—		$	27	$	(1	)	$	(11	)	$	—	$	(3	)	$	153	$	—
States, municipalities and political subdivisions	85		—		—			—		—			—			—		(24		)	61		—
Asset-backed:
Residential mortgage-backed	207		2		(2		)	4		—			(7		)	—		—			204		—
Commercial mortgage-backed	87		5		(4		)	8		—			(15		)	—		(10		)	71		—
Other asset-backed	490		—		(6		)	43		(20		)	(32		)	—		(4		)	471		—
Total asset-backed	784		7		(12		)	55		(20		)	(54		)	—		(14		)	746		—
Total fixed maturity securities	1,010		7		(12		)	82		(21		)	(65		)	—		(41		)	960		—
Equity securities	16		—		(1		)	—		—			—			—		—			15		—
Life settlement contracts	75		5		—			—		—			(6		)	—		—			74		2
Total	$	1,101	$	12	$	(13	)	$	82	$	(21	)	$	(71	)	$	—	$	(41	)	$	1,049	$	2

Level 3 (In millions)	Balance as of January 1, 2016		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2016		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2016 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	168	$	1		$	14		$	163	$	(36	)	$	(15	)	$	—	$	(34	)	$	261	$	—
States, municipalities and political subdivisions	2		—			—			—		—			(1		)	—		—			1		—
Asset-backed:
Residential mortgage-backed	134		2			(2		)	15		—			(10		)	—		(60		)	79		—
Commercial mortgage-backed	22		—			—			32		—			(17		)	3		(16		)	24		—
Other asset-backed	53		—			2			69		(25		)	(1		)	2		(57		)	43		—
Total asset-backed	209		2			—			116		(25		)	(28		)	5		(133		)	146		—
Total fixed maturity securities	379		3			14			279		(61		)	(44		)	5		(167		)	408		—
Equity securities	20		(1		)	—			—		—			—			—		—			19		(2		)
Life settlement contracts	74		10			—			—		—			(17		)	—		—			67		2
Total	$	473	$	12		$	14		$	279	$	(61	)	$	(61	)	$	5	$	(167	)	$	494	$	—

Level 3 (In millions)	Balance as of January 1, 2015		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2015		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2015 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	162	$	(1	)	$	(1	)	$	39	$	(13	)	$	(32	)	$	37	$	(38	)	$	153	$	—
States, municipalities and political subdivisions	94		1			—			—		—			(10		)	—		(24		)	61		—
Asset-backed:
Residential mortgage-backed	189		4			(4		)	76		—			(28		)	—		(33		)	204		—
Commercial mortgage-backed	83		7			(4		)	23		—			(17		)	17		(38		)	71		—
Other asset-backed	655		3			4			125		(254		)	(52		)	—		(10		)	471		(1		)
Total asset-backed	927		14			(4		)	224		(254		)	(97		)	17		(81		)	746		(1		)
Total fixed maturity securities	1,183		14			(5		)	263		(267		)	(139		)	54		(143		)	960		(1		)
Equity securities	16		—			(1		)	—		—			—			—		—			15		—
Life settlement contracts	82		22			—			—		—			(30		)	—		—			74		1
Total	$	1,281	$	36		$	(6	)	$	263	$	(267	)	$	(169	)	$	54	$	(143	)	$	1,049	$	—

*Net realized and unrealized gains and losses from Level 3 securities and derivatives are reported in Net income (loss) as follows:

Major Category of Assets and Liabilities	Condensed Consolidated Statements of Operations Line Items
Fixed maturity securities available-for-sale (1)	Net realized investment gains (losses)
Fixed maturity securities trading	Net investment income
Equity securities (1)	Net realized investment gains (losses)
Other invested assets - Derivative financial instruments held in a trading portfolio	Net investment income
Other invested assets - Derivative financial instruments not held in a trading portfolio	Net realized investment gains (losses)
Life settlement contracts	Other revenues
Other liabilities - Derivative financial instruments	Net realized investment gains (losses)

(1) Unrealized gains and losses are reported within AOCI.

Securities shown on the previous pages may be transferred in or out of levels within the fair value hierarchy based on the availability of observable market information and quoted prices used to determine the fair value of the security. The availability of observable market information and quoted prices varies based on market conditions and trading volume. During the three and nine months endedSeptember 30, 2016 there were no transfers between Level 1 and Level 2. During the three and nine months endedSeptember 30, 2015 there were $10 million of transfers from Level 2 to Level 1 and no transfers from Level 1 to Level 2. The Company's policy is to recognize transfers between levels at the beginning of quarterly reporting periods.

Valuation Methodologies and Inputs

The following section describes the valuation methodologies and relevant inputs used to measure different financial instruments at fair value, including an indication of the level in the fair value hierarchy in which the instruments are generally classified.

Fixed Maturity Securities

Level 1 securities include highly liquid and exchange traded bonds and redeemable preferred stock, valued using quoted market prices. Level 2 securities include most other fixed maturity securities as the significant inputs are observable in the marketplace. All classes of Level 2 fixed maturity securities are valued using a methodology based on information generated by market transactions involving identical or comparable assets, a discounted cash flow methodology, or a combination of both when necessary. Common inputs for all classes of fixed maturity securities include prices from recently executed transactions of similar securities, marketplace quotes, benchmark yields, spreads off benchmark yields, interest rates and U.S. Treasury or swap curves. Specifically for asset-backed securities, key inputs include prepayment and default projections based on past performance of the underlying collateral and current market data. Fixed maturity securities are primarily assigned to Level 3 in cases where broker/dealer quotes are significant inputs to the valuation and there is a lack of transparency as to whether these quotes are based on information that is observable in the marketplace. Level 3 securities also include private placement debt securities whose fair value is determined using internal models with inputs that are not market observable.

Equity Securities

Level 1 equity securities include publicly traded securities valued using quoted market prices. Level 2 securities are primarily non-redeemable preferred stocks and common stocks valued using pricing for similar securities, recently executed transactions and other pricing models utilizing market observable inputs. Level 3 securities are primarily priced using broker/dealer quotes and internal models with inputs that are not market observable.

Other Invested Assets

The fair value of Federal Home Loan Bank of Chicago (FHLBC) stock is equal to par because it can only be redeemed by the FHLBC at par or sold to another member of the FHLBC at par and is classified as Level 2.

As of September 30, 2016 and December 31, 2015, there were approximately $30 million and $27 million respectively of overseas deposits within other invested assets, which can be redeemed at net asset value in 90 days or less. Overseas deposits are excluded from the fair value hierarchy because their fair value is recorded using the net asset value per share (or equivalent) practical expedient.

Short Term Investments

Securities that are actively traded or have quoted prices are classified as Level 1. These securities include money market funds and treasury bills. Level 2 primarily includes commercial paper, for which all inputs are market observable. Fixed maturity securities purchased within one year of maturity are valued consistent with fixed maturity securities discussed above. Short term investments as presented in the tables above differ from the amounts presented on the Condensed Consolidated Balance Sheets because certain short term investments, such as time deposits, are not measured at fair value.

Life Settlement Contracts

The fair values of life settlement contracts are determined as the present value of the anticipated death benefits less anticipated premium payments based on contract terms that are distinct for each insured, as well as the Company's own assumptions for mortality, premium expense and the rate of return that a buyer would require on the contracts, as no comparable market pricing data is available.

Derivative Financial Investments

Level 2 securities primarily include the embedded derivative on funds withheld liability. The embedded derivative on funds withheld liability is valued using the change in fair value of the assets supporting the funds withheld liability, which are fixed maturity securities valued with observable inputs.

Significant Unobservable Inputs

The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurement of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company.

September 30, 2016	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	211	Discounted cash flow	Credit spread	2% - 40% (6%)
Life settlement contracts	67		Discounted cash flow	Discount rate risk premium	9%
				Mortality assumption	55% - 1676% (162%)

December 31, 2015	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	138	Discounted cash flow	Credit spread	3% - 184% (6%)
Life settlement contracts	74		Discounted cash flow	Discount rate risk premium	9%
				Mortality assumption	55% - 1676% (164%)

For fixed maturity securities, an increase to the credit spread assumptions would result in a lower fair value measurement. For life settlement contracts, an increase in the discount rate risk premium or decrease in the mortality assumption would result in a lower fair value measurement.

Financial Assets and Liabilities Not Measured at Fair Value

The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Condensed Consolidated Balance Sheets are presented in the following tables.

September 30, 2016	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	629	$	—	$	—	$	654	$	654
Liabilities
Long term debt	$	2,709	$	—	$	3,041	$	—	$	3,041

December 31, 2015	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	678	$	—	$	—	$	688	$	688
Liabilities
Short term debt	$	350	$	—	$	360	$	—	$	360
Long term debt	2,210		—		2,433		—		2,433

The following methods and assumptions were used to estimate the fair value of these financial assets and liabilities.

The fair value of Mortgage loans was based on the present value of the expected future cash flows discounted at the current interest rate for origination of similar quality loans, adjusted for specific loan risk.

The Company's senior notes and debentures were valued based on observable market prices. The fair value for other debt was estimated using discounted cash flows based on current incremental borrowing rates for similar borrowing arrangements.

The carrying amounts reported on the Condensed Consolidated Balance Sheets for Cash, Short term investments not carried at fair value, Accrued investment income and certain Other assets and Other liabilities approximate fair value due to the short term nature of these items. These assets and liabilities are not listed in the tables above.

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Claim and Claim Adjustment Expense Reserves

9 Months Ended

Sep. 30, 2016

Liability for Claims and Claims Adjustment Expense [Abstract]

Claim and Claim Adjustment Expense Reserves

Note E. Claim and Claim Adjustment Expense Reserves

The Company's property and casualty insurance claim and claim adjustment expense reserves represent the estimated amounts necessary to resolve all outstanding claims, including incurred but not reported (IBNR) claims as of the reporting date. The Company's reserve projections are based primarily on detailed analysis of the facts in each case, the Company's experience with similar cases and various historical development patterns. Consideration is given to such historical patterns as field reserving trends and claim settlement practices, loss payments, pending levels of unpaid claims and product mix, as well as court decisions, economic conditions including inflation and public attitudes. All of these factors can affect the estimation of claim and claim adjustment expense reserves.

Establishing claim and claim adjustment expense reserves, including claim and claim adjustment expense reserves for catastrophic events that have occurred, is an estimation process. Many factors can ultimately affect the final settlement of a claim and, therefore, the necessary reserve. Changes in the law, results of litigation, medical costs, the cost of repair materials and labor rates can all affect ultimate claim costs. In addition, time can be a critical part of reserving determinations since the longer the span between the incidence of a loss and the payment or settlement of the claim, the more variable the ultimate settlement amount can be. Accordingly, short-tail claims, such as property damage claims, tend to be more reasonably estimable than long-tail claims, such as workers' compensation, general liability and professional liability claims. Adjustments to prior year reserve estimates, if necessary, are reflected in the results of operations in the period that the need for such adjustments is determined. There can be no assurance that the Company's ultimate cost for insurance losses will not exceed current estimates.

Catastrophes are an inherent risk of the property and casualty insurance business and have contributed to material period-to-period fluctuations in the Company's results of operations and/or equity. The Company reported catastrophe losses, net of reinsurance, of $16 million and $137 million for the three and nine months endedSeptember 30, 2016. Catastrophe losses in 2016 resulted primarily from U.S. weather-related events and the Fort McMurray wildfires. The Company reported catastrophe losses, net of reinsurance, of $14 million and $103 million for the three and nine months endedSeptember 30, 2015.

Net Prior Year Development

The following tables and discussion present the net prior year development.

Three months ended September 30, 2016
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(112	)	$	(5	)	$	(15	)	$	—	$	(132	)
Pretax (favorable) unfavorable premium development	—			(3		)	(2		)	—		(5		)
Total pretax (favorable) unfavorable net prior year development	$	(112	)	$	(8	)	$	(17	)	$	—	$	(137	)

Three months ended September 30, 2015
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(130	)	$	(11	)	$	(34	)	$	—	$	(175	)
Pretax (favorable) unfavorable premium development	(2		)	(5		)	2			—		(5		)
Total pretax (favorable) unfavorable net prior year development	$	(132	)	$	(16	)	$	(32	)	$	—	$	(180	)

Nine months ended September 30, 2016
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(211	)	$	(37	)	$	(34	)	$	—	$	(282	)
Pretax (favorable) unfavorable premium development	(18		)	(7		)	(2		)	—		(27		)
Total pretax (favorable) unfavorable net prior year development	$	(229	)	$	(44	)	$	(36	)	$	—	$	(309	)

Nine months ended September 30, 2015
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(141	)	$	—		$	(46	)	$	—	$	(187	)
Pretax (favorable) unfavorable premium development	(10		)	(17		)	16			—		(11		)
Total pretax (favorable) unfavorable net prior year development	$	(151	)	$	(17	)	$	(30	)	$	—	$	(198	)

Specialty

The following table presents further detail of the net prior year claim and allocated claim adjustment expense reserve development (development) recorded for the Specialty segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Medical Professional Liability	$	13		$	(19	)	$	(17	)	$	(11	)
Other Professional Liability and Management Liability	(48		)	(37		)	(98		)	(41		)
Surety	(63		)	(70		)	(63		)	(69		)
Warranty	2			—			7			1
Other	(16		)	(4		)	(40		)	(21		)
Total pretax (favorable) unfavorable development	$	(112	)	$	(130	)	$	(211	)	$	(141	)

Three Months

2016

Unfavorable development for medical professional liability was largely due to higher than expected frequency in accident years 2014 and 2015 in aging services. Increased claims on a specific hospital policy in accident years 2014 and 2015 was also an unfavorable contributor although more than offset by favorable development relative to expectations in accident years 2013 and prior.

Favorable development in other professional liability and management liability was primarily related to lower than expected frequency of claims and favorable outcomes on specific claims for accident years 2010 through 2014.

Favorable development in surety coverages was primarily due to lower than expected frequency of large losses in accident years 2014 and prior.

Favorable development for other coverages was due to better than expected claim frequency in commercial lines coverages provided to Specialty customers in accident years 2010 through 2015.

2015

Favorable development in medical professional liability was related to lower than expected severity in accident years 2008 through 2013.

Favorable development in other professional liability and management liability was related to better than expected large loss emergence in financial institutions in accident years 2012 and prior. Additional favorable development related to lower than expected severity in accident years 2009 through 2013 for directors and officers liability.

Favorable development for surety coverages was primarily due to lower than expected frequency of large losses in accident years 2013 and prior.

Nine Months

2016

Favorable development for medical professional liability was primarily due to lower than expected severities for individual healthcare professionals, allied facilities and hospitals in accident years 2011 and prior. This was partially offset by unfavorable development in accident years 2012 and 2013 related to higher than expected large loss emergence in hospitals and higher than expected frequency and severity in accident years 2014 and 2015 in our aging services business.

Favorable development in other professional liability and management liability was primarily related to favorable settlements on closed claims in accident years 2011 through 2013 in professional services. Additional favorable development related to lower than expected frequency of claims and favorable outcomes on specific claims in accident years 2010 through 2014 in professional services. This was partially offset by unfavorable development related to a specific financial institutions claim in accident year 2014, higher severities in accident year 2015, and deterioration on credit crises-related claims in accident year 2009.

Favorable development in surety coverages was primarily due to lower than expected frequency of large losses in accident years 2014 and prior.

Favorable development for other coverages provided to Specialty customers was due to better than expected claim frequency in property coverages in accident year 2015 and commercial lines coverages in accident years 2010 through 2015.

2015

Overall, favorable development for medical professional liability was related to lower than expected severity in accident years 2008 through 2013. Unfavorable development was recorded related to increased claim frequency in the aging services business for accident years 2013 and 2014.

Overall, favorable development in other professional liability and management liability related to better than expected large loss emergence in financial institutions in accident years 2012 and prior. Additional favorable development related to lower than expected severity in accident years 2009 through 2013 for directors and officers liability and lower than expected severity in accident years 2010 and prior for professional services. Unfavorable development was related to increased claim frequency on public company management liability in accident years 2012 through 2014.

Favorable development for surety coverages was primarily due to lower than expected frequency of large losses in accident years 2013 and prior.

Favorable development for other coverages was due to better than expected claim frequency in property coverages provided to Specialty customers in accident year 2014.

Commercial

The following table presents further detail of the development recorded for the Commercial segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Commercial Auto	$	(12	)	$	—		$	(47	)	$	7
General Liability	14			3			(38		)	8
Workers' Compensation	(6		)	(1		)	48			22
Property and Other	(1		)	(13		)	—			(37		)
Total pretax (favorable) unfavorable development	$	(5	)	$	(11	)	$	(37	)	$	—

Three Months

2016

Favorable development for commercial auto was primarily due to lower than expected severities in accident years 2012 through 2015.

Unfavorable development for general liability was primarily due to an increase in reported claims prior to the closing of the three year window set forth by the Minnesota Child Victims Act in accident years 2006 and prior.

Favorable development for workers' compensation was primarily driven by lower than expected frequencies in accident years 2009 through 2014, partially offset by the estimated impact of recent Florida court rulings in accident years 2008 through 2015.

2015

Favorable development for property and other was primarily due to better than expected loss emergence on catastrophe events in accident year 2014.

Nine Months

2016

Favorable development for commercial auto was primarily due to favorable settlements on claims in accident years 2010 through 2014 and lower than expected severities in accident years 2012 through 2015.

Favorable development for general liability was primarily due to better than expected claim settlements in accident years 2012 through 2014 and better than expected severity on umbrella claims in accident years 2010 through 2013. This was partially offset by unfavorable development related to an increase in reported claims prior to the closing of the three year window set forth by the Minnesota Child Victims Act in accident years 2006 and prior.

Unfavorable development for workers' compensation was primarily due to higher than expected severity for Defense Base Act contractors and the estimated impact of recent Florida court rulings in accident years 2008 through 2015. This was partially offset by favorable development related to lower than expected frequencies related to accident years 2009 through 2014.

Unfavorable development for property and other was primarily due to higher than expected severity from a 2015 catastrophe event. This was offset by favorable development primarily due to better than expected loss frequency in accident years 2013 through 2015.

2015

Unfavorable development for workers’ compensation was primarily due to higher than expected severity related to Defense Base Act contractors in accident years 2008 through 2013.

Favorable development for property and other was primarily due to better than expected loss emergence from 2012 and 2014 catastrophe events and better than expected frequency of large claims in accident year 2014.

The nine months also included unfavorable loss development related to an extra contractual obligation loss and losses associated with premium development.

International

The following table presents further detail of the development recorded for the International segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Medical Professional Liability	$	(2	)	$	(8	)	$	(3	)	$	(8	)
Other Professional Liability	(1		)	(11		)	16			(16		)
Liability	(2		)	(5		)	(21		)	(12		)
Property & Marine	(9		)	(5		)	(16		)	(19		)
Other	(1		)	(5		)	(10		)	9
Total pretax (favorable) unfavorable development	$	(15	)	$	(34	)	$	(34	)	$	(46	)

Three Months

2016

Favorable development for other professional liability was primarily due to favorable settlements on claims in accident years 2013 and prior. This was largely offset by higher than expected unfavorable large loss emergence in accident years 2014 and 2015.

Favorable development for property and marine was primarily due to favorable emergence of expected losses on a specific claim relating to the December 2015 United Kingdom (UK) Floods.

2015

Favorable development in medical professional liability was due to better than expected loss emergence on accident years 2011 to 2013.

Favorable development in other professional liability was due to better than expected large loss emergence in accident years 2011 and prior.

Favorable development in liability was due to better than expected large loss emergence in accident years 2012 and prior.

Favorable development in property and marine was due to better than expected individual large loss emergence and favorable settlements on large claims in accident years 2013 and 2014.

Nine Months

2016

Unfavorable development for other professional liability was primarily due to higher than expected large loss emergence in accident years 2011 through 2015, partially offset by favorable settlements on claims in accident years 2013 and prior.

Favorable development for liability was primarily due to better than expected severity in accident years 2013 and prior.

Favorable development for property and marine was primarily due to favorable emergence of expected losses on a specific claim relating to the December 2015 UK Floods.

Favorable development for other coverages was primarily due to better than expected severity in auto liability in accident years 2011 through 2015.

2015

Favorable development in medical professional liability was due to better than expected loss emergence on accident years 2011 to 2013.

Favorable development in other professional liability was due to better than expected large loss emergence in accident years 2011 and prior.

Favorable development in liability was due to better than expected large loss emergence in accident years 2012 and prior.

Favorable development in property and marine was due to better than expected individual large loss emergence and favorable settlements on large claims in accident years 2013 and 2014.

Unfavorable development in other is due to higher than expected large losses in financial institutions and political risk, primarily in accident year 2014.

Asbestos and Environmental Pollution (A&EP) Reserves

In 2010, Continental Casualty Company (CCC) together with several of the Company’s insurance subsidiaries completed a transaction with National Indemnity Company (NICO), a subsidiary of Berkshire Hathaway Inc., under which substantially all of the Company’s legacy A&EP liabilities were ceded to NICO through a Loss Portfolio Transfer (LPT). At the effective date of the transaction, the Company ceded approximately $1.6 billion of net A&EP claim and allocated claim adjustment expense reserves to NICO under a retroactive reinsurance agreement with an aggregate limit of $4 billion. The $1.6 billion of claim and allocated claim adjustment expense reserves ceded to NICO was net of $1.2 billion of ceded claim and allocated claim adjustment expense reserves under existing third-party reinsurance contracts. The NICO LPT aggregate reinsurance limit also covers credit risk on the existing third-party reinsurance related to these liabilities. The Company paid NICO a reinsurance premium of $2 billion and transferred to NICO billed third-party reinsurance receivables related to A&EP claims with a net book value of $215 million, resulting in total consideration of $2.2 billion.

Through December 31, 2013, the Company recognized $0.9 billion of additional amounts ceded under the LPT. As a result, the cumulative amounts ceded under the LPT exceeded the $2.2 billion consideration paid, resulting in the NICO LPT moving into a gain position, requiring deferred retroactive reinsurance accounting treatment. This deferred gain is recognized in earnings in proportion to actual paid recoveries under the LPT. Over the life of the contract, there is no economic impact as long as any additional losses incurred are within the limit of the LPT. In a period in which a change in the estimate of ceded incurred losses is recognized, the change to the deferred gain is cumulatively recognized in earnings as if the revised estimate was available at the effective date of the LPT.

The following table presents the impact of the Loss Portfolio Transfer on the Condensed Consolidated Statements of Operations.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net A&EP adverse development before consideration of LPT	$	—		$	—		$	200		$	150
Provision for uncollectible third-party reinsurance on A&EP	—			—			—			—
Additional amounts ceded under LPT	—			—			200			150
Retroactive reinsurance benefit recognized	(12		)	(4		)	(94		)	(75		)
Pretax impact of unrecognized deferred retroactive reinsurance benefit	$	(12	)	$	(4	)	$	106		$	75

The Company completed its reserve review of A&EP reserves in the first quarter of 2016. Based upon the Company's review, net unfavorable development prior to cessions to the LPT of $200 million was recognized. The unfavorable development was driven by an increase in anticipated future expenses associated with determination of coverage, higher anticipated payouts associated with a limited number of historical accounts having significant asbestos exposures and higher than expected severity on pollution claims. This unfavorable development was ceded to NICO under the LPT; however, the Company’s Net income was negatively affected due to the application of retroactive reinsurance accounting, as only a portion of the additional amounts ceded under the LPT were recognized in that quarter. All amounts recognized related to the LPT are recorded within Insurance claims and policyholders’ benefits in the Condensed Consolidated Statement of Operations.

As of September 30, 2016 and December 31, 2015, the cumulative amounts ceded under the LPT were $2.8 billion and $2.6 billion. The unrecognized deferred retroactive reinsurance benefit was $347 million and $241 million as of September 30, 2016 and December 31, 2015.

NICO established a collateral trust account as security for its obligations to the Company. The fair value of the collateral trust account was $2.5 billion and $2.8 billion as of September 30, 2016 and December 31, 2015. In addition, Berkshire Hathaway Inc. guaranteed the payment obligations of NICO up to the full aggregate reinsurance limit as well as certain of NICO’s performance obligations under the trust agreement. NICO is responsible for claims handling and billing and collection from third-party reinsurers related to the Company’s A&EP claims.

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Legal Proceedings and Contingent Liabilities

9 Months Ended

Sep. 30, 2016

Legal Proceedings and Contingent Liabilities [Abstract]

Legal Proceedings and Contingent Liabilities

Note F. Legal Proceedings and Contingent Liabilities

CNA 401(k) Plus Plan Litigation

In September 2016, a class action lawsuit was filed against CCC, Continental Assurance Company (CAC), CNAF, the Investment Committee of the CNA 401(k) Plus Plan, The Northern Trust Company and John Does 1-10 (collectively Defendants) over the CNA 401(k) Plus Plan. The complaint alleges that Defendants breached fiduciary duties to the CNA 401(k) Plus Plan and caused prohibited transactions in violation of The Employee Retirement Income Security Act of 1974 when the CNA Fixed Income Fund’s annuity contract with CAC was canceled. The plaintiff alleges he and a proposed class of the CNA 401(k) Plus Plan participants who had invested in the Fixed Income Fund suffered lower returns in their CNA 401(k) Plus Plan investments as a consequence of these alleged violations and seeks relief on behalf of the putative class. Management has only recently begun evaluating the lawsuit as this litigation is in its preliminary stages, and as of yet no class has been certified. CCC and the other Defendants are contesting the case and management currently is unable to predict the final outcome or the impact on the Company’s financial condition, results of operations, or cash flows. As of September 30, 2016, the likelihood of loss is reasonably possible, but the amount of loss, if any, cannot be estimated at this stage of the litigation.

Other Litigation

The Company is a party to other routine litigation incidental to its business, which, based on the facts and circumstances currently known, is not material to the Condensed Consolidated Financial Statements.

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Benefit Plans

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Benefit Plans

Note G. Benefit Plans

The components of net periodic cost (benefit) are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pension cost (benefit)
Service cost	$	—		$	—		$	—		$	4
Interest cost on projected benefit obligation	29			29			85			85
Expected return on plan assets	(41		)	(44		)	(121		)	(131		)
Amortization of net actuarial loss	9			7			28			26
Net periodic pension cost (benefit)	$	(3	)	$	(8	)	$	(8	)	$	(16	)

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Commitments and Contingencies, and Guarantees

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments Contingencies and Guarantees [Text Block]

Note H. Commitments, Contingencies and Guarantees

Commitments and Contingencies

The Company holds an investment in a real estate joint venture in which the Company, on a joint and several basis with the other unrelated shareholders guaranteed to fund operating deficits of the joint venture and an operating lease for an office building entered into by the venture. The lease was terminated in March 2016. In the event that the other parties to the joint venture are unable to meet their commitments in funding this joint venture, the Company would be required to assume future obligations, primarily related to the wind-down of the lease and joint venture. The Company does not believe it is likely that it will be required to do so. However, as of September 30, 2016, the maximum potential loss that the Company could be required to pay under this guarantee, in excess of amounts already recorded, was approximately $12 million. If the Company were required to assume future obligations, the Company would have the right to pursue reimbursement from the other shareholders.

Guarantees

As of September 30, 2016 and December 31, 2015, the Company had recorded liabilities of approximately $5 million related to guarantee and indemnification agreements and management believes that it is not likely that any future indemnity claims will be significantly greater than the amounts recorded.

In the course of selling business entities and assets to third parties, the Company agreed to guarantee the performance of certain obligations of a previously owned subsidiary and to indemnify purchasers for losses arising out of breaches of representations and warranties with respect to the business entities or assets sold, including, in certain cases, losses arising from undisclosed liabilities or certain named litigation. Such guarantee and indemnification agreements in effect for sales of business entities, assets and third-party loans may include provisions that survive indefinitely. As of September 30, 2016, the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $258 million. Should the Company be required to make payments under the guarantee, it would have the right to seek reimbursement in certain cases from an affiliate of a previously owned subsidiary.

In addition, the Company has agreed to provide indemnification to third-party purchasers for certain losses associated with sold business entities or assets that are not limited by a contractual monetary amount. As of September 30, 2016, the Company had outstanding unlimited indemnifications in connection with the sales of certain of its business entities or assets that included tax liabilities arising prior to a purchaser's ownership of an entity or asset, defects in title at the time of sale, employee claims arising prior to closing and in some cases losses arising from certain litigation and undisclosed liabilities. Certain provisions of the indemnification agreements survive indefinitely, while others survive until the applicable statutes of limitation expire, or until the agreed-upon contract terms expire.

The Company also provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities provided by a previously owned subsidiary. As of September 30, 2016, the potential amount of future payments the Company could be required to pay under these guarantees was approximately $1.9 billion, which will be paid over the lifetime of the annuitants. The Company does not believe any payment is likely under these guarantees, as the Company is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities.

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Accumulated Other Comprehensive Income (Loss) by Component

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss) by Component

Note I. Accumulated Other Comprehensive Income (Loss) by Component

The tables below display the changes in Accumulated other comprehensive income (loss) by component.

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments		Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of July 1, 2016	$	31	$	934	$	(637	)	$	(118	)	$	210
Other comprehensive income (loss) before reclassifications	7		69		—			(24		)	52
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(2), $(13), $3, $- and $(12)	4		27		(6		)	—			25
Other comprehensive income (loss) net of tax (expense) benefit of $(2), $(19), $(3), $- and $(24)	3		42		6			(24		)	27
Balance as of September 30, 2016	$	34	$	976	$	(631	)	$	(142	)	$	237

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments			Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of July 1, 2015	$	31	$	689		$	(585	)	$	8		$	143
Other comprehensive income (loss) before reclassifications	2		(67		)	—			(53		)	(118		)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $-, $17, $2, $- and $19	—		(31		)	(4		)	—			(35		)
Other comprehensive income (loss) net of tax (expense) benefit of $(1), $21, $(2), $- and $18	2		(36		)	4			(53		)	(83		)
Balance as of September 30, 2015	$	33	$	653		$	(581	)	$	(45	)	$	60

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments		Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of January 1, 2016	$	27	$	390	$	(648	)	$	(84	)	$	(315	)
Other comprehensive income (loss) before reclassifications	9		615		—			(58		)	566
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(1), $(12), $9, $- and $(4)	2		29		(17		)	—			14
Other comprehensive income (loss) net of tax (expense) benefit of $(4), $(292), $(9), $- and $(305)	7		586		17			(58		)	552
Balance as of September 30, 2016	$	34	$	976	$	(631	)	$	(142	)	$	237

(In millions)	Net unrealized gains (losses) on investments with OTTI losses			Net unrealized gains (losses) on other investments			Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of January 1, 2015	$	36		$	942		$	(633	)	$	55		$	400
Other comprehensive income (loss) before reclassifications	(3		)	(318		)	36			(100		)	(385		)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $-, $22, $9, $- and $31	—			(29		)	(16		)	—			(45		)
Other comprehensive income (loss) net of tax (expense) benefit of $1, $140, $(28), $- and $113	(3		)	(289		)	52			(100		)	(340		)
Balance as of September 30, 2015	$	33		$	653		$	(581	)	$	(45	)	$	60

Amounts reclassified from Accumulated other comprehensive income (loss) shown above are reported in Net income (loss) as follows:

Component of AOCI	Condensed Consolidated Statements of Operations Line Item Affected by Reclassifications
Net unrealized gains (losses) on investments with OTTI losses	Net realized investment gains (losses)
Net unrealized gains (losses) on other investments	Net realized investment gains (losses)
Pension and postretirement benefits	Other operating expenses

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Business Segments

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Business Segments

Note J. Business Segments

The Company's core property and casualty commercial insurance operations are aggregated and reported in three business segments: Specialty, Commercial and International. The Company's non-core operations are managed and reported in two segments: Life & Group Non-Core and Corporate & Other Non-Core.

The accounting policies of the segments are the same as those described in Note A to the Consolidated Financial Statements within CNAF's Annual Report on Form 10-K for the year ended December 31, 2015. The Company manages most of its assets on a legal entity basis, while segment operations are generally conducted across legal entities. As such, only Insurance and Reinsurance receivables, Insurance reserves, Deferred acquisition costs and Goodwill are readily identifiable for all individual segments. Distinct investment portfolios are not maintained for every individual segment; accordingly, allocation of assets to each segment is not performed. Therefore, a significant portion of Net investment income and Realized investment gains or losses are allocated primarily based on each segment's net carried insurance reserves, as adjusted. All significant intersegment income and expense has been eliminated. Income taxes have been allocated on the basis of the taxable income of the segments.

In the following tables, certain financial measures are presented to provide information used by management to monitor the Company's operating performance. Management utilizes these financial measures to monitor the Company's insurance operations and investment portfolio. Net operating income (loss), which is derived from certain income statement amounts, is used by management to monitor performance of the Company's insurance operations. The Company's investment portfolio is monitored by management through analysis of various factors including unrealized gains and losses on securities, portfolio duration and exposure to market and credit risk. Based on such analyses, the Company may recognize an OTTI loss on an investment security in accordance with its policy, or sell a security, which may produce realized gains and losses.

Net operating income (loss) is calculated by excluding from net income (loss) the after-tax effects of i) net realized investment gains (losses) ii) income or loss from discontinued operations and iii) any cumulative effects of changes in accounting guidance. The calculation of net operating income excludes net realized investment gains (losses) because net realized investment gains (losses) are largely discretionary, except for some losses related to OTTI, and are generally driven by economic factors that are not necessarily consistent with key drivers of underwriting performance, and are therefore not considered an indication of trends in insurance operations.

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

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

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Organization Review

9 Months Ended

Sep. 30, 2016

Restructuring and Related Activities [Abstract]

Restructuring and Related Activities Disclosure [Text Block]

Note K. Organization Review

In 2016, the Company completed a comprehensive organization review intended to improve effectiveness and efficiency. The review resulted in the elimination of approximately 370 positions. The Company will incur employee termination costs as a result of these actions. The Company anticipates that the total cost resulting from the organization review will be approximately $20 million, of which $11 million and $17 million was incurred during the three and nine months endedSeptember 30, 2016. Additional termination costs will be incurred through March 2017. The costs incurred to date are included in Total claims, benefits, and expenses on the consolidated Statements of Operations and have been allocated to the Company's reportable segments in a manner consistent with the Company's current allocation of personnel costs. The costs by reportable segment for the periods ended September 30, 2016, are presented in the following table.

Periods ended September 30, 2016	Three Months		Nine Months
(In millions)
Specialty	$	3	$	4
Commercial	7		12
International	—		—
Life & Group Non-Core	1		1
Corporate & Other Non-Core	—		—
Total organization review costs	$	11	$	17

XML

General Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

Consolidation, Policy [Policy Text Block]

The accompanying Condensed Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP).

Use of Estimates, Policy [Policy Text Block]

The preparation of Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Condensed Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates.

New Accounting Pronouncements and Changes in Accounting Principles, Policies [Text Block]

Recently Adopted Accounting Standards Updates (ASU)

In April 2015, the Financial Accounting Standards Board (FASB) issued ASU No. 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The updated accounting guidance requires debt issuance costs to be presented as a deduction from the corresponding debt liability instead of the historical presentation as an unamortized debt issuance asset. As of January 1, 2016, the Company adopted the updated accounting guidance retrospectively. The Company adjusted its previously reported financial information included herein to reflect the change in accounting guidance for debt issuance costs. The impacts of adopting the new accounting standard on the Company’s Consolidated Balance Sheet as of December 31, 2015, were a decrease in Other assets and a decrease in Long term debt of $2 million.

In May 2015, the FASB issued ASU No. 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). The updated accounting guidance removes the requirement to categorize assets measured at fair value utilizing the net asset value per share (or equivalent) practical expedient within the fair value hierarchy. As of January 1, 2016, the Company adopted the updated accounting guidance retrospectively. The Company adjusted its previously reported financial information included herein to reflect the change in accounting guidance for assets measured using the net asset value. The impact of adopting the new accounting standard resulted in excluding overseas deposits of $30 million and $27 million from the fair value level disclosure as of September 30, 2016 and December 31, 2015.

New Accounting Pronouncements, Policy [Policy Text Block]

Accounting Standards Pending Adoption

In May 2015, the FASB issued ASU No. 2015-09, Financial Services-Insurance (Topic 944): Disclosures about

Short-Duration Contracts. The updated accounting guidance requires enhanced disclosures to provide additional information about insurance liabilities for short-duration contracts. The guidance is effective for annual periods beginning after December 15, 2015, and interim periods within the annual periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on the Company's financial statement disclosures, but expects to provide additional incurred and paid claims development information by accident year, quantitative information about claim frequency and the history of claims duration for significant lines of business within the Company’s annual financial statements.

In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The updated accounting guidance requires changes to the reporting model for financial instruments. The guidance is effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on the Company's financial statements, and expects the primary change for the Company to be the requirement for equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842): Accounting for Leases. The updated accounting guidance requires lessees to recognize on the balance sheet the assets and liabilities for the rights and obligations created by all leases, including those historically accounted for as operating leases. The guidance is effective for interim and annual periods beginning after December 15, 2018. The Company is currently evaluating the effect the updated guidance will have on the Company's financial statements. It is expected that assets and liabilities will increase based on the present value of remaining lease payments for leases in place at the adoption date, however, this is not expected to be material to the Company's results of operations or financial position.

In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The updated accounting guidance simplifies the accounting for share-based payment award transactions including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The guidance is effective for annual and interim periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on the Company’s financial statements, but anticipates the primary change to be the recognition of excess tax benefits or deficiencies on vesting or settlement of awards as an income tax benefit or expense, respectively, within net income and the related cash flows classified within operating activities.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The updated accounting guidance requires changes to the recognition of credit losses on financial instruments not accounted for at fair value through net income. The guidance is effective for interim and annual periods beginning after December 15, 2019. The Company is currently evaluating the effect the guidance will have on the Company's financial statements, but expects the primary changes to be the use of the expected credit loss model for its mortgage loan portfolio and reinsurance receivables and the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses if the estimate of credit losses declines.

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Investments (Tables)

9 Months Ended

Sep. 30, 2016

Investments [Abstract]

Net investment income

The significant components of Net investment income are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Fixed maturity securities	$	457		$	449		$	1,352		$	1,344
Equity securities	1			3			8			9
Limited partnership investments	65			(93		)	97			69
Mortgage loans	8			8			30			25
Short term investments	2			2			6			4
Trading portfolio	1			1			7			6
Other	4			1			4			1
Gross investment income	538			371			1,504			1,458
Investment expense	(14		)	(17		)	(43		)	(46		)
Net investment income	$	524		$	354		$	1,461		$	1,412

Net realized investment gains (losses)

Net realized investment gains (losses) are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net realized investment gains (losses):
Fixed maturity securities:
Gross realized gains	$	67		$	22		$	152		$	91
Gross realized losses	(20		)	(51		)	(106		)	(120		)
Net realized investment gains (losses) on fixed maturity securities	47			(29		)	46			(29		)
Equity securities:
Gross realized gains	1			1			5			2
Gross realized losses	(4		)	(19		)	(10		)	(21		)
Net realized investment gains (losses) on equity securities	(3		)	(18		)	(5		)	(19		)
Derivative financial instruments	1			(1		)	(12		)	9
Short term investments and other	1			(1		)	(3		)	—
Net realized investment gains (losses)	$	46		$	(49	)	$	26		$	(39	)

Components of net other than temporary impairment losses recognized in earnings by asset type

The components of Net other-than-temporary impairment (OTTI) losses recognized in earnings by asset type are presented in the following table.

Periods ended September 30	Three Months				Nine Months
(In millions)	2016		2015		2016		2015
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	14	$	36	$	43	$	52
States, municipalities and political subdivisions	—		—		—		18
Asset-backed:
Residential mortgage-backed	—		1		1		7
Other asset-backed	—		—		3		1
Total asset-backed	—		1		4		8
Total fixed maturity securities available-for-sale	14		37		47		78
Equity securities available-for-sale -- Common stock	4		19		9		20
Short term investments	—		—		—		1
OTTI losses recognized in earnings	$	18	$	56	$	56	$	99

Summary of fixed maturity and equity securities

The following tables present a summary of fixed maturity and equity securities.

September 30, 2016	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Unrealized OTTI Losses (Gains)
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	17,985	$	1,867	$	36	$	19,816	$	(1	)
States, municipalities and political subdivisions	11,566		1,937		2		13,501		(27		)
Asset-backed:
Residential mortgage-backed	5,174		206		15		5,365		(24		)
Commercial mortgage-backed	2,064		88		8		2,144		—
Other asset-backed	948		12		1		959		—
Total asset-backed	8,186		306		24		8,468		(24		)
U.S. Treasury and obligations of government-sponsored enterprises	68		8		—		76		—
Foreign government	415		23		—		438		—
Redeemable preferred stock	18		2		—		20		—
Total fixed maturity securities available-for-sale	38,238		4,143		62		42,319		$	(52	)
Total fixed maturity securities trading	2						2
Equity securities available-for-sale:
Common stock	15		6		1		20
Preferred stock	93		5		2		96
Total equity securities available-for-sale	108		11		3		116
Total	$	38,348	$	4,154	$	65	$	42,437

December 31, 2015	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Unrealized OTTI Losses (Gains)
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	17,080	$	1,019	$	342	$	17,757	$	—
States, municipalities and political subdivisions	11,729		1,453		8		13,174		(4		)
Asset-backed:
Residential mortgage-backed	4,935		154		17		5,072		(37		)
Commercial mortgage-backed	2,154		55		12		2,197		—
Other asset-backed	923		6		8		921		—
Total asset-backed	8,012		215		37		8,190		(37		)
U.S. Treasury and obligations of government-sponsored enterprises	62		5		—		67		—
Foreign government	334		13		1		346		—
Redeemable preferred stock	33		2		—		35		—
Total fixed maturity securities available-for-sale	37,250		2,707		388		39,569		$	(41	)
Total fixed maturity securities trading	3						3
Equity securities available-for-sale:
Common stock	46		3		1		48
Preferred stock	145		7		3		149
Total equity securities available-for-sale	191		10		4		197
Total	$	37,444	$	2,717	$	392	$	39,769

Securities in a gross unrealized loss position

The following tables present the estimated fair value and gross unrealized losses of fixed maturity and equity securities in a gross unrealized loss position by the length of time in which the securities have continuously been in that position.

	Less than 12 Months				12 Months or Longer				Total
September 30, 2016	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	617	$	10	$	338	$	26	$	955	$	36
States, municipalities and political subdivisions	163		2		9		—		172		2
Asset-backed:
Residential mortgage-backed	273		6		212		9		485		15
Commercial mortgage-backed	391		7		96		1		487		8
Other asset-backed	153		1		17		—		170		1
Total asset-backed	817		14		325		10		1,142		24
U.S. Treasury and obligations of government-sponsored enterprises	2		—		—		—		2		—
Foreign government	16		—		—		—		16		—
Total fixed maturity securities available-for-sale	1,615		26		672		36		2,287		62
Equity securities available-for-sale:
Common stock	—		1		—		—		—		1
Preferred stock	15		2		—		—		15		2
Total equity securities available-for-sale	15		3		—		—		15		3
Total	$	1,630	$	29	$	672	$	36	$	2,302	$	65

	Less than 12 Months				12 Months or Longer				Total
December 31, 2015	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
(In millions)
Fixed maturity securities available-for-sale:
Corporate and other bonds	$	4,882	$	302	$	162	$	40	$	5,044	$	342
States, municipalities and political subdivisions	338		8		75		—		413		8
Asset-backed:
Residential mortgage-backed	963		9		164		8		1,127		17
Commercial mortgage-backed	652		10		96		2		748		12
Other asset-backed	552		8		5		—		557		8
Total asset-backed	2,167		27		265		10		2,432		37
U.S. Treasury and obligations of government-sponsored enterprises	4		—		—		—		4		—
Foreign government	54		1		—		—		54		1
Redeemable preferred stock	3		—		—		—		3		—
Total fixed maturity securities available-for-sale	7,448		338		502		50		7,950		388
Equity securities available-for-sale:
Common stock	3		1		—		—		3		1
Preferred stock	13		3		—		—		13		3
Total equity securities available-for-sale	16		4		—		—		16		4
Total	$	7,464	$	342	$	502	$	50	$	7,966	$	392

Activity related to the pretax fixed maturity credit loss component reflected within retained earnings for securities still held for which a portion of an OTTI loss was recognized in OCI

The following table presents the activity related to the pretax credit loss component reflected in Retained earnings on fixed maturity securities still held as of September 30, 2016 and 2015 for which a portion of an OTTI loss was recognized in Other comprehensive income (loss).

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Beginning balance of credit losses on fixed maturity securities	$	41		$	59		$	53		$	62
Reductions for securities sold during the period	(2		)	(2		)	(14		)	(5		)
Reductions for securities the Company intends to sell or more likely than not will be required to sell	(1		)	—			(1		)	—
Ending balance of credit losses on fixed maturity securities	$	38		$	57		$	38		$	57

Contractual maturity

The following table presents available-for-sale fixed maturity securities by contractual maturity.

	September 30, 2016				December 31, 2015
(In millions)	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	1,665	$	1,710	$	1,574	$	1,595
Due after one year through five years	9,052		9,584		7,721		8,070
Due after five years through ten years	14,659		15,625		14,652		14,915
Due after ten years	12,862		15,400		13,303		14,989
Total	$	38,238	$	42,319	$	37,250	$	39,569

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Fair Value (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis are presented in the following tables.

September 30, 2016							Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2		Level 3
Assets
Fixed maturity securities:
Corporate and other bonds	$	—	$	19,557	$	261	$	19,818
States, municipalities and political subdivisions	—		13,500		1		13,501
Asset-backed:
Residential mortgage-backed	—		5,286		79		5,365
Commercial mortgage-backed	—		2,120		24		2,144
Other asset-backed	—		916		43		959
Total asset-backed	—		8,322		146		8,468
U.S. Treasury and obligations of government-sponsored enterprises	76		—		—		76
Foreign government	—		438		—		438
Redeemable preferred stock	20		—		—		20
Total fixed maturity securities	96		41,817		408		42,321
Equity securities	97		—		19		116
Other invested assets	—		5		—		5
Short term investments	432		911		—		1,343
Life settlement contracts, included in Other assets	—		—		67		67
Total assets	$	625	$	42,733	$	494	$	43,852
Liabilities
Other liabilities	$	—	$	8	$	—	$	8
Total liabilities	$	—	$	8	$	—	$	8

December 31, 2015								Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2			Level 3
Assets
Fixed maturity securities:
Corporate and other bonds	$	—	$	17,592		$	168	$	17,760
States, municipalities and political subdivisions	—		13,172			2		13,174
Asset-backed:
Residential mortgage-backed	—		4,938			134		5,072
Commercial mortgage-backed	—		2,175			22		2,197
Other asset-backed	—		868			53		921
Total asset-backed	—		7,981			209		8,190
U.S. Treasury and obligations of government-sponsored enterprises	66		1			—		67
Foreign government	—		346			—		346
Redeemable preferred stock	35		—			—		35
Total fixed maturity securities	101		39,092			379		39,572
Equity securities	177		—			20		197
Other invested assets	—		17			—		17
Short term investments	448		1,134			—		1,582
Life settlement contracts, included in Other assets	—		—			74		74
Total assets	$	726	$	40,243		$	473	$	41,442
Liabilities
Other liabilities	$	—	$	(5	)	$	—	$	(5	)
Total liabilities	$	—	$	(5	)	$	—	$	(5	)

Table of reconciliation for assets and liablities measured at fair value on a recurring basis using significant unobservable inputs

The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).

Level 3 (In millions)	Balance as of July 1, 2016		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales		Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2016		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2016 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	242	$	1		$	7		$	16	$	—	$	(5	)	$	—	$	—		$	261	$	—
States, municipalities and political subdivisions	2		—			—			—		—		(1		)	—		—			1		—
Asset-backed:
Residential mortgage-backed	134		—			(1		)	5		—		(1		)	—		(58		)	79		—
Commercial mortgage-backed	11		—			—			23		—		(8		)	—		(2		)	24		—
Other asset-backed	45		—			—			34		—		—			—		(36		)	43		—
Total asset-backed	190		—			(1		)	62		—		(9		)	—		(96		)	146		—
Total fixed maturity securities	434		1			6			78		—		(15		)	—		(96		)	408		—
Equity securities	19		(1		)	1			—		—		—			—		—			19		(2		)
Life settlement contracts	67		—			—			—		—		—			—		—			67		—
Total	$	520	$	—		$	7		$	78	$	—	$	(15	)	$	—	$	(96	)	$	494	$	(2	)

Level 3 (In millions)	Balance as of July 1, 2015		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*		Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2015		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2015 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	141	$	—	$	—		$	27	$	(1	)	$	(11	)	$	—	$	(3	)	$	153	$	—
States, municipalities and political subdivisions	85		—		—			—		—			—			—		(24		)	61		—
Asset-backed:
Residential mortgage-backed	207		2		(2		)	4		—			(7		)	—		—			204		—
Commercial mortgage-backed	87		5		(4		)	8		—			(15		)	—		(10		)	71		—
Other asset-backed	490		—		(6		)	43		(20		)	(32		)	—		(4		)	471		—
Total asset-backed	784		7		(12		)	55		(20		)	(54		)	—		(14		)	746		—
Total fixed maturity securities	1,010		7		(12		)	82		(21		)	(65		)	—		(41		)	960		—
Equity securities	16		—		(1		)	—		—			—			—		—			15		—
Life settlement contracts	75		5		—			—		—			(6		)	—		—			74		2
Total	$	1,101	$	12	$	(13	)	$	82	$	(21	)	$	(71	)	$	—	$	(41	)	$	1,049	$	2

Level 3 (In millions)	Balance as of January 1, 2016		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2016		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2016 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	168	$	1		$	14		$	163	$	(36	)	$	(15	)	$	—	$	(34	)	$	261	$	—
States, municipalities and political subdivisions	2		—			—			—		—			(1		)	—		—			1		—
Asset-backed:
Residential mortgage-backed	134		2			(2		)	15		—			(10		)	—		(60		)	79		—
Commercial mortgage-backed	22		—			—			32		—			(17		)	3		(16		)	24		—
Other asset-backed	53		—			2			69		(25		)	(1		)	2		(57		)	43		—
Total asset-backed	209		2			—			116		(25		)	(28		)	5		(133		)	146		—
Total fixed maturity securities	379		3			14			279		(61		)	(44		)	5		(167		)	408		—
Equity securities	20		(1		)	—			—		—			—			—		—			19		(2		)
Life settlement contracts	74		10			—			—		—			(17		)	—		—			67		2
Total	$	473	$	12		$	14		$	279	$	(61	)	$	(61	)	$	5	$	(167	)	$	494	$	—

Level 3 (In millions)	Balance as of January 1, 2015		Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in Net income (loss)*			Net change in unrealized appreciation (depreciation) included in Other comprehensive income (loss)			Purchases		Sales			Settlements			Transfers into Level 3		Transfers out of Level 3			Balance as of September 30, 2015		Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2015 recognized in Net income (loss)*
Fixed maturity securities:
Corporate and other bonds	$	162	$	(1	)	$	(1	)	$	39	$	(13	)	$	(32	)	$	37	$	(38	)	$	153	$	—
States, municipalities and political subdivisions	94		1			—			—		—			(10		)	—		(24		)	61		—
Asset-backed:
Residential mortgage-backed	189		4			(4		)	76		—			(28		)	—		(33		)	204		—
Commercial mortgage-backed	83		7			(4		)	23		—			(17		)	17		(38		)	71		—
Other asset-backed	655		3			4			125		(254		)	(52		)	—		(10		)	471		(1		)
Total asset-backed	927		14			(4		)	224		(254		)	(97		)	17		(81		)	746		(1		)
Total fixed maturity securities	1,183		14			(5		)	263		(267		)	(139		)	54		(143		)	960		(1		)
Equity securities	16		—			(1		)	—		—			—			—		—			15		—
Life settlement contracts	82		22			—			—		—			(30		)	—		—			74		1
Total	$	1,281	$	36		$	(6	)	$	263	$	(267	)	$	(169	)	$	54	$	(143	)	$	1,049	$	—

Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets

The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurement of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company.

September 30, 2016	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	211	Discounted cash flow	Credit spread	2% - 40% (6%)
Life settlement contracts	67		Discounted cash flow	Discount rate risk premium	9%
				Mortality assumption	55% - 1676% (162%)

December 31, 2015	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	138	Discounted cash flow	Credit spread	3% - 184% (6%)
Life settlement contracts	74		Discounted cash flow	Discount rate risk premium	9%
				Mortality assumption	55% - 1676% (164%)

Carrying amount and estimated fair value of financial instrument assets and liabilities not measured at fair value

The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Condensed Consolidated Balance Sheets are presented in the following tables.

September 30, 2016	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	629	$	—	$	—	$	654	$	654
Liabilities
Long term debt	$	2,709	$	—	$	3,041	$	—	$	3,041

December 31, 2015	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	678	$	—	$	—	$	688	$	688
Liabilities
Short term debt	$	350	$	—	$	360	$	—	$	360
Long term debt	2,210		—		2,433		—		2,433

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Claim and Claim Adjustment Expense Reserves (Tables)

9 Months Ended

Sep. 30, 2016

Liability for Claims and Claims Adjustment Expense [Abstract]

Net prior year development

The following tables and discussion present the net prior year development.

Three months ended September 30, 2016
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(112	)	$	(5	)	$	(15	)	$	—	$	(132	)
Pretax (favorable) unfavorable premium development	—			(3		)	(2		)	—		(5		)
Total pretax (favorable) unfavorable net prior year development	$	(112	)	$	(8	)	$	(17	)	$	—	$	(137	)

Three months ended September 30, 2015
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(130	)	$	(11	)	$	(34	)	$	—	$	(175	)
Pretax (favorable) unfavorable premium development	(2		)	(5		)	2			—		(5		)
Total pretax (favorable) unfavorable net prior year development	$	(132	)	$	(16	)	$	(32	)	$	—	$	(180	)

Nine months ended September 30, 2016
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(211	)	$	(37	)	$	(34	)	$	—	$	(282	)
Pretax (favorable) unfavorable premium development	(18		)	(7		)	(2		)	—		(27		)
Total pretax (favorable) unfavorable net prior year development	$	(229	)	$	(44	)	$	(36	)	$	—	$	(309	)

Nine months ended September 30, 2015
(In millions)	Specialty			Commercial			International			Corporate & Other Non-Core		Total
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development	$	(141	)	$	—		$	(46	)	$	—	$	(187	)
Pretax (favorable) unfavorable premium development	(10		)	(17		)	16			—		(11		)
Total pretax (favorable) unfavorable net prior year development	$	(151	)	$	(17	)	$	(30	)	$	—	$	(198	)

Net prior year claim and allocated claim adjustment expense reserve development for Specialty segment

The following table presents further detail of the net prior year claim and allocated claim adjustment expense reserve development (development) recorded for the Specialty segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Medical Professional Liability	$	13		$	(19	)	$	(17	)	$	(11	)
Other Professional Liability and Management Liability	(48		)	(37		)	(98		)	(41		)
Surety	(63		)	(70		)	(63		)	(69		)
Warranty	2			—			7			1
Other	(16		)	(4		)	(40		)	(21		)
Total pretax (favorable) unfavorable development	$	(112	)	$	(130	)	$	(211	)	$	(141	)

Net prior year claim and allocated claim adjustment expense reserve development for Commercial segment

The following table presents further detail of the development recorded for the Commercial segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Commercial Auto	$	(12	)	$	—		$	(47	)	$	7
General Liability	14			3			(38		)	8
Workers' Compensation	(6		)	(1		)	48			22
Property and Other	(1		)	(13		)	—			(37		)
Total pretax (favorable) unfavorable development	$	(5	)	$	(11	)	$	(37	)	$	—

Net prior year claim and allocated claim adjustment expense reserve development for International segment

The following table presents further detail of the development recorded for the International segment.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pretax (favorable) unfavorable development:
Medical Professional Liability	$	(2	)	$	(8	)	$	(3	)	$	(8	)
Other Professional Liability	(1		)	(11		)	16			(16		)
Liability	(2		)	(5		)	(21		)	(12		)
Property & Marine	(9		)	(5		)	(16		)	(19		)
Other	(1		)	(5		)	(10		)	9
Total pretax (favorable) unfavorable development	$	(15	)	$	(34	)	$	(34	)	$	(46	)

Impact Of Loss Portfolio Transfer On Consolidated Statements Of Operations [Table Text Block]

The following table presents the impact of the Loss Portfolio Transfer on the Condensed Consolidated Statements of Operations.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Net A&EP adverse development before consideration of LPT	$	—		$	—		$	200		$	150
Provision for uncollectible third-party reinsurance on A&EP	—			—			—			—
Additional amounts ceded under LPT	—			—			200			150
Retroactive reinsurance benefit recognized	(12		)	(4		)	(94		)	(75		)
Pretax impact of unrecognized deferred retroactive reinsurance benefit	$	(12	)	$	(4	)	$	106		$	75

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Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Components of net periodic cost (benefit)

The components of net periodic cost (benefit) are presented in the following table.

Periods ended September 30	Three Months						Nine Months
(In millions)	2016			2015			2016			2015
Pension cost (benefit)
Service cost	$	—		$	—		$	—		$	4
Interest cost on projected benefit obligation	29			29			85			85
Expected return on plan assets	(41		)	(44		)	(121		)	(131		)
Amortization of net actuarial loss	9			7			28			26
Net periodic pension cost (benefit)	$	(3	)	$	(8	)	$	(8	)	$	(16	)

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Accumulated Other Comprehensive Income (Loss) by Component (Tables)

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss) by Component

The tables below display the changes in Accumulated other comprehensive income (loss) by component.

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments		Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of July 1, 2016	$	31	$	934	$	(637	)	$	(118	)	$	210
Other comprehensive income (loss) before reclassifications	7		69		—			(24		)	52
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(2), $(13), $3, $- and $(12)	4		27		(6		)	—			25
Other comprehensive income (loss) net of tax (expense) benefit of $(2), $(19), $(3), $- and $(24)	3		42		6			(24		)	27
Balance as of September 30, 2016	$	34	$	976	$	(631	)	$	(142	)	$	237

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments			Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of July 1, 2015	$	31	$	689		$	(585	)	$	8		$	143
Other comprehensive income (loss) before reclassifications	2		(67		)	—			(53		)	(118		)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $-, $17, $2, $- and $19	—		(31		)	(4		)	—			(35		)
Other comprehensive income (loss) net of tax (expense) benefit of $(1), $21, $(2), $- and $18	2		(36		)	4			(53		)	(83		)
Balance as of September 30, 2015	$	33	$	653		$	(581	)	$	(45	)	$	60

(In millions)	Net unrealized gains (losses) on investments with OTTI losses		Net unrealized gains (losses) on other investments		Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of January 1, 2016	$	27	$	390	$	(648	)	$	(84	)	$	(315	)
Other comprehensive income (loss) before reclassifications	9		615		—			(58		)	566
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $(1), $(12), $9, $- and $(4)	2		29		(17		)	—			14
Other comprehensive income (loss) net of tax (expense) benefit of $(4), $(292), $(9), $- and $(305)	7		586		17			(58		)	552
Balance as of September 30, 2016	$	34	$	976	$	(631	)	$	(142	)	$	237

(In millions)	Net unrealized gains (losses) on investments with OTTI losses			Net unrealized gains (losses) on other investments			Pension and postretirement benefits			Cumulative foreign currency translation adjustment			Total
Balance as of January 1, 2015	$	36		$	942		$	(633	)	$	55		$	400
Other comprehensive income (loss) before reclassifications	(3		)	(318		)	36			(100		)	(385		)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $-, $22, $9, $- and $31	—			(29		)	(16		)	—			(45		)
Other comprehensive income (loss) net of tax (expense) benefit of $1, $140, $(28), $- and $113	(3		)	(289		)	52			(100		)	(340		)
Balance as of September 30, 2015	$	33		$	653		$	(581	)	$	(45	)	$	60

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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

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Organization Review (Tables)

9 Months Ended

Sep. 30, 2016

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs [Table Text Block]

The costs by reportable segment for the periods ended September 30, 2016, are presented in the following table.

Periods ended September 30, 2016	Three Months		Nine Months
(In millions)
Specialty	$	3	$	4
Commercial	7		12
International	—		—
Life & Group Non-Core	1		1
Corporate & Other Non-Core	—		—
Total organization review costs	$	11	$	17

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General (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Cumulative Effect of New Accounting Principle in Period of Adoption on Other Assets		$ (2)
Cumulative Effect of New Accounting Principle in Period of Adoption on Long Term Debt		(2)
Other Invested Assets Overseas Deposit	$ 30	$ 27

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Earnings Per Share Narrative (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	707	514	549	545
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	175	106	178	107

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Investments (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Investments [Abstract]
Gains (Losses) on Extinguishment of Debt	$ 8
Reduction of net unrealized gains on investments included in AOCI due to shadow adjustments	1,681	$ 1,111
Derivative, Notional Amount	175	179
Derivative Asset, Fair Value, Gross Asset	8
Derivative Liability, Fair Value, Gross Liability		$ (5)
Future Capital Call Commitments	393
Mortgage Loan Commitments	40
Commitments To Purchase Or Fund Additional Amounts	205
Commitments To Sell Various Privately Placed Debt Securities	$ 163

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Investments (Net investment income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Investment Income [Line Items]
Gross investment income	$ 538	$ 371	$ 1,504	$ 1,458
Investment expense	(14)	(17)	(43)	(46)
Net investment income	524	354	1,461	1,412
Fixed maturity securities [Member]
Net Investment Income [Line Items]
Gross investment income	457	449	1,352	1,344
Total equity securities available-for-sale [Member]
Net Investment Income [Line Items]
Gross investment income	1	3	8	9
Limited partnership investments [Member]
Net Investment Income [Line Items]
Gross investment income	65	(93)	97	69
Mortgage loans [Member]
Net Investment Income [Line Items]
Gross investment income	8	8	30	25
Short term investments [Member]
Net Investment Income [Line Items]
Gross investment income	2	2	6	4
Trading portfolio [Member]
Net Investment Income [Line Items]
Gross investment income	1	1	7	6
Other Investment Income [Member]
Net Investment Income [Line Items]
Gross investment income	$ 4	$ 1	$ 4	$ 1

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Investments (Net realized investment gains (losses)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net realized investment gains (losses)	$ 46	$ (49)	$ 26	$ (39)
Fixed maturity securities [Member]
Gross realized gains	67	22	152	91
Gross realized losses	(20)	(51)	(106)	(120)
Net realized investment gains (losses)	47	(29)	46	(29)
Total equity securities available-for-sale [Member]
Gross realized gains	1	1	5	2
Gross realized losses	(4)	(19)	(10)	(21)
Net realized investment gains (losses)	(3)	(18)	(5)	(19)
Derivative [Member]
Net realized investment gains (losses)	1	(1)	(12)	9
Short term investments and other [Member]
Net realized investment gains (losses)	$ 1	$ (1)	$ (3)	$ 0

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Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other-than-temporary impairment losses recognized in earnings	$ 18	$ 56	$ 56	$ 99
Corporate and other bonds [Member]
Other-than-temporary impairment losses recognized in earnings	14	36	43	52
States, municipalities and political subdivisions [Member]
Other-than-temporary impairment losses recognized in earnings	0	0	0	18
Residential mortgage-backed [Member]
Other-than-temporary impairment losses recognized in earnings	0	1	1	7
Other asset-backed [Member]
Other-than-temporary impairment losses recognized in earnings	0	0	3	1
Total asset-backed [Member]
Other-than-temporary impairment losses recognized in earnings	0	1	4	8
Total fixed maturity securities available-for-sale [Member]
Other-than-temporary impairment losses recognized in earnings	14	37	47	78
Common stock [Member]
Other-than-temporary impairment losses recognized in earnings	4	19	9	20
Short term investments [Member]
Other-than-temporary impairment losses recognized in earnings	$ 0	$ 0	$ 0	$ 1

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Investments (Summary of fixed maturity and equity securities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Cost or Amortized Cost	$ 38,348	$ 37,444
Gross Unrealized Gain	4,154	2,717
Gross Unrealized Loss	65	392
Estimated fair value	42,437	39,769
Corporate and other bonds [Member]
Cost or Amortized Cost	17,985	17,080
Gross Unrealized Gain	1,867	1,019
Gross Unrealized Loss	36	342
Estimated fair value	19,816	17,757
Unrealized OTTI Losses (Gains)	(1)	0
States, municipalities and political subdivisions [Member]
Cost or Amortized Cost	11,566	11,729
Gross Unrealized Gain	1,937	1,453
Gross Unrealized Loss	2	8
Estimated fair value	13,501	13,174
Unrealized OTTI Losses (Gains)	(27)	(4)
Residential mortgage-backed [Member]
Cost or Amortized Cost	5,174	4,935
Gross Unrealized Gain	206	154
Gross Unrealized Loss	15	17
Estimated fair value	5,365	5,072
Unrealized OTTI Losses (Gains)	(24)	(37)
Commercial mortgage-backed [Member]
Cost or Amortized Cost	2,064	2,154
Gross Unrealized Gain	88	55
Gross Unrealized Loss	8	12
Estimated fair value	2,144	2,197
Unrealized OTTI Losses (Gains)	0	0
Other asset-backed [Member]
Cost or Amortized Cost	948	923
Gross Unrealized Gain	12	6
Gross Unrealized Loss	1	8
Estimated fair value	959	921
Unrealized OTTI Losses (Gains)	0	0
Total asset-backed [Member]
Cost or Amortized Cost	8,186	8,012
Gross Unrealized Gain	306	215
Gross Unrealized Loss	24	37
Estimated fair value	8,468	8,190
Unrealized OTTI Losses (Gains)	(24)	(37)
U.S. Treasury and obligations of government-sponsored enterprises [Member]
Cost or Amortized Cost	68	62
Gross Unrealized Gain	8	5
Gross Unrealized Loss	0	0
Estimated fair value	76	67
Unrealized OTTI Losses (Gains)	0	0
Foreign Government Debt Securities [Member]
Cost or Amortized Cost	415	334
Gross Unrealized Gain	23	13
Gross Unrealized Loss	0	1
Estimated fair value	438	346
Unrealized OTTI Losses (Gains)	0	0
Redeemable preferred stock [Member]
Cost or Amortized Cost	18	33
Gross Unrealized Gain	2	2
Gross Unrealized Loss	0	0
Estimated fair value	20	35
Unrealized OTTI Losses (Gains)	0	0
Total fixed maturity securities available-for-sale [Member]
Cost or Amortized Cost	38,238	37,250
Gross Unrealized Gain	4,143	2,707
Gross Unrealized Loss	62	388
Estimated fair value	42,319	39,569
Unrealized OTTI Losses (Gains)	(52)	(41)
Total fixed maturity securities trading [Member]
Cost or Amortized Cost, Trading Securities	2	3
Estimated Fair Value, Trading Securities	2	3
Common stock [Member]
Cost or Amortized Cost	15	46
Gross Unrealized Gain	6	3
Gross Unrealized Loss	1	1
Estimated fair value	20	48
Preferred stock [Member]
Cost or Amortized Cost	93	145
Gross Unrealized Gain	5	7
Gross Unrealized Loss	2	3
Estimated fair value	96	149
Total equity securities available-for-sale [Member]
Cost or Amortized Cost	108	191
Gross Unrealized Gain	11	10
Gross Unrealized Loss	3	4
Estimated fair value	$ 116	$ 197

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Investments (Securities in a gross unrealized loss position) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 1,630	$ 7,464
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	29	342
Estimated Fair Value, 12 Months or Longer	672	502
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	36	50
Estimated Fair Value, Total	2,302	7,966
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	65	392
Corporate and other bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	617	4,882
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	10	302
Estimated Fair Value, 12 Months or Longer	338	162
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	26	40
Estimated Fair Value, Total	955	5,044
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	36	342
States, municipalities and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	163	338
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2	8
Estimated Fair Value, 12 Months or Longer	9	75
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	172	413
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2	8
Residential mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	273	963
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	6	9
Estimated Fair Value, 12 Months or Longer	212	164
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	9	8
Estimated Fair Value, Total	485	1,127
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	15	17
Commercial mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	391	652
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7	10
Estimated Fair Value, 12 Months or Longer	96	96
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	2
Estimated Fair Value, Total	487	748
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	8	12
Other asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	153	552
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	8
Estimated Fair Value, 12 Months or Longer	17	5
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	170	557
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	8
Total asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	817	2,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	14	27
Estimated Fair Value, 12 Months or Longer	325	265
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	10	10
Estimated Fair Value, Total	1,142	2,432
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	24	37
U.S. Treasury and obligations of government-sponsored enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	2	4
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Estimated Fair Value, 12 Months or Longer	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	2	4
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0	0
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	16	54
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	1
Estimated Fair Value, 12 Months or Longer	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	16	54
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0	1
Redeemable preferred stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months		3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Estimated Fair Value, 12 Months or Longer		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Estimated Fair Value, Total		3
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		0
Total fixed maturity securities available-for-sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	1,615	7,448
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	26	338
Estimated Fair Value, 12 Months or Longer	672	502
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	36	50
Estimated Fair Value, Total	2,287	7,950
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	62	388
Common stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	0	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	1
Estimated Fair Value, 12 Months or Longer	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	0	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	1
Preferred stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	15	13
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2	3
Estimated Fair Value, 12 Months or Longer	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	15	13
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2	3
Total equity securities available-for-sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	15	16
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3	4
Estimated Fair Value, 12 Months or Longer	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	15	16
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 3	$ 4

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Investments (Activity related to the pretax fixed maturity credit loss component reflected within retained earnings for securities still held for which a portion of an OTTI loss was recognized in OCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance of credit losses on fixed maturity securities	$ 41	$ 59	$ 53	$ 62
Reductions for securities sold during the period	(2)	(2)	(14)	(5)
Reductions for securities the Company intends to sell or more likely than not will be required to sell	(1)	0	(1)	0
Ending balance of credit losses on fixed maturity securities	$ 38	$ 57	$ 38	$ 57

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Investments (Contractual maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Investments [Abstract]
Due in one year or less, cost or amortized cost	$ 1,665	$ 1,574
Due after one year through five years, cost or amortized cost	9,052	7,721
Due after five years through ten years, cost or amortized cost	14,659	14,652
Due after ten years, cost or amortized cost	12,862	13,303
Total Amortized Cost Basis	38,238	37,250
Due in one year or less, estimated fair value	1,710	1,595
Due after one year through five years, estimated fair value	9,584	8,070
Due after five years through ten years, estimated fair value	15,625	14,915
Due after ten years, estimated fair value	15,400	14,989
Total Estimated Fair Value	$ 42,319	$ 39,569

XML

Fair Value (Assets and liabilities measured at fair value on a recurring basis) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	$ 43,852	$ 41,442
Fair value of liabilities, measured on a recurring basis	8	(5)
Corporate and other bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	19,818	17,760
States, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	13,501	13,174
Residential mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	5,365	5,072
Commercial mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	2,144	2,197
Other asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	959	921
Total asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	8,468	8,190
U.S. Treasury and obligations of government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	76	67
Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	438	346
Redeemable preferred stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	20	35
Fixed maturity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	42,321	39,572
Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	116	197
Other invested assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	5	17
Short term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	1,343	1,582
Life settlement contracts, included in Other assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	67	74
Embedded Derivative Financial Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities, measured on a recurring basis	8	(5)
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	625	726
Fair value of liabilities, measured on a recurring basis	0	0
Level 1 [Member] | Corporate and other bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | States, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Residential mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Commercial mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Other asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Total asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | U.S. Treasury and obligations of government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	76	66
Level 1 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Redeemable preferred stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	20	35
Level 1 [Member] | Fixed maturity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	96	101
Level 1 [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	97	177
Level 1 [Member] | Other invested assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Short term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	432	448
Level 1 [Member] | Life settlement contracts, included in Other assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 1 [Member] | Embedded Derivative Financial Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities, measured on a recurring basis	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	42,733	40,243
Fair value of liabilities, measured on a recurring basis	8	(5)
Level 2 [Member] | Corporate and other bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	19,557	17,592
Level 2 [Member] | States, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	13,500	13,172
Level 2 [Member] | Residential mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	5,286	4,938
Level 2 [Member] | Commercial mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	2,120	2,175
Level 2 [Member] | Other asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	916	868
Level 2 [Member] | Total asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	8,322	7,981
Level 2 [Member] | U.S. Treasury and obligations of government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	1
Level 2 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	438	346
Level 2 [Member] | Redeemable preferred stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 2 [Member] | Fixed maturity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	41,817	39,092
Level 2 [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 2 [Member] | Other invested assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	5	17
Level 2 [Member] | Short term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	911	1,134
Level 2 [Member] | Life settlement contracts, included in Other assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 2 [Member] | Embedded Derivative Financial Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities, measured on a recurring basis	8	(5)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	494	473
Fair value of liabilities, measured on a recurring basis	0	0
Level 3 [Member] | Corporate and other bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	261	168
Level 3 [Member] | States, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	1	2
Level 3 [Member] | Residential mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	79	134
Level 3 [Member] | Commercial mortgage-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	24	22
Level 3 [Member] | Other asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	43	53
Level 3 [Member] | Total asset-backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	146	209
Level 3 [Member] | U.S. Treasury and obligations of government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 3 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 3 [Member] | Redeemable preferred stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 3 [Member] | Fixed maturity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	408	379
Level 3 [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	19	20
Level 3 [Member] | Other invested assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 3 [Member] | Short term investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	0	0
Level 3 [Member] | Life settlement contracts, included in Other assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	67	74
Level 3 [Member] | Embedded Derivative Financial Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities, measured on a recurring basis	$ 0	$ 0

XML

Fair Value (Table of reconciliation for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	$ 520	$ 1,101	$ 473	$ 1,281
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	12	12	36
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	7	(13)	14	(6)
Purchases	78	82	279	263
Sales	0	(21)	(61)	(267)
Settlements	(15)	(71)	(61)	(169)
Transfers into Level 3	0	0	5	54
Transfers out of Level 3	(96)	(41)	(167)	(143)
Balance, Ending, Assets	494	1,049	494	1,049
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(2)	2	0	0
Corporate and other bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	242	141	168	162
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	1	0	1	(1)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	7	0	14	(1)
Purchases	16	27	163	39
Sales	0	(1)	(36)	(13)
Settlements	(5)	(11)	(15)	(32)
Transfers into Level 3	0	0	0	37
Transfers out of Level 3	0	(3)	(34)	(38)
Balance, Ending, Assets	261	153	261	153
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
States, municipalities and political subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	2	85	2	94
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	0	0	1
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	(1)	0	(1)	(10)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(24)	0	(24)
Balance, Ending, Assets	1	61	1	61
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Residential mortgage-backed [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	134	207	134	189
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	2	2	4
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(1)	(2)	(2)	(4)
Purchases	5	4	15	76
Sales	0	0	0	0
Settlements	(1)	(7)	(10)	(28)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(58)	0	(60)	(33)
Balance, Ending, Assets	79	204	79	204
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	11	87	22	83
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	5	0	7
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	(4)	0	(4)
Purchases	23	8	32	23
Sales	0	0	0	0
Settlements	(8)	(15)	(17)	(17)
Transfers into Level 3	0	0	3	17
Transfers out of Level 3	(2)	(10)	(16)	(38)
Balance, Ending, Assets	24	71	24	71
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Other asset-backed [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	45	490	53	655
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	0	0	3
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	(6)	2	4
Purchases	34	43	69	125
Sales	0	(20)	(25)	(254)
Settlements	0	(32)	(1)	(52)
Transfers into Level 3	0	0	2	0
Transfers out of Level 3	(36)	(4)	(57)	(10)
Balance, Ending, Assets	43	471	43	471
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	(1)
Total asset-backed [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	190	784	209	927
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	7	2	14
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(1)	(12)	0	(4)
Purchases	62	55	116	224
Sales	0	(20)	(25)	(254)
Settlements	(9)	(54)	(28)	(97)
Transfers into Level 3	0	0	5	17
Transfers out of Level 3	(96)	(14)	(133)	(81)
Balance, Ending, Assets	146	746	146	746
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	(1)
Total Fixed maturity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	434	1,010	379	1,183
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	1	7	3	14
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	6	(12)	14	(5)
Purchases	78	82	279	263
Sales	0	(21)	(61)	(267)
Settlements	(15)	(65)	(44)	(139)
Transfers into Level 3	0	0	5	54
Transfers out of Level 3	(96)	(41)	(167)	(143)
Balance, Ending, Assets	408	960	408	960
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	(1)
Equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	19	16	20	16
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	(1)	0	(1)	0
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	1	(1)	0	(1)
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, Ending, Assets	19	15	19	15
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(2)	0	(2)	0
Life settlement contracts, included in Other assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	67	75	74	82
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	5	10	22
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	(6)	(17)	(30)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, Ending, Assets	67	74	67	74
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 0	$ 2	$ 2	$ 1

XML

Fair Value (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2, Transfers	$ 0	$ 0	$ 0	$ 0
Fair Value, Assets, Level 2 to Level 1, Transfers	0	$ 10	0	$ 10
Other Invested Assets Overseas Deposit	$ 30		$ 30		$ 27

XML

Fair Value (Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets) (Details) - Income Approach Valuation Technique [Member] - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fixed maturity securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 211	$ 138
Fixed maturity securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit Spread	2.00%	3.00%
Fixed maturity securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit Spread	40.00%	184.00%
Fixed maturity securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit Spread	6.00%	6.00%
Life settlement contracts, included in Other assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 67	$ 74
Life settlement contracts, included in Other assets [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortality assumption	55.00%	55.00%
Life settlement contracts, included in Other assets [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortality assumption	1676.00%	1676.00%
Life settlement contracts, included in Other assets [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortality assumption	162.00%	164.00%
Life settlement contracts, included in Other assets [Member] | Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate risk premium	9.00%	9.00%

XML

Fair Value (Carrying amount and estimated fair value of financial instrument assets and liabilities which are not measured at fair value) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Financial Assets [Abstract]
Mortgage loans	$ 629	$ 678
Financial Liabilities [Abstract]
Short term debt	0	350
Long term debt	2,709	2,210
Carrying Amount [Member]
Financial Assets [Abstract]
Mortgage loans	629	678
Financial Liabilities [Abstract]
Short term debt		350
Long term debt	2,709	2,210
Estimated Fair Value [Member]
Financial Assets [Abstract]
Mortgage loans	654	688
Financial Liabilities [Abstract]
Short term debt		360
Long term debt	3,041	2,433
Level 1 [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Mortgage loans	0	0
Financial Liabilities [Abstract]
Short term debt		0
Long term debt	0	0
Level 2 [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Mortgage loans	0	0
Financial Liabilities [Abstract]
Short term debt		360
Long term debt	3,041	2,433
Level 3 [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Mortgage loans	654	688
Financial Liabilities [Abstract]
Short term debt		0
Long term debt	$ 0	$ 0

XML

Claim and Claim Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		48 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2010
Catastrophe losses net of reinsurance	$ 16		$ 14	$ 137	$ 103
Loss Portfolio Transfer [Member]
Liability for Asbestos and Environmental Claims, Net								$ 1,600
Aggregate limit under AEP Loss Portfolio Transfer								4,000
Claim And Allocated Claim Adjustment Expense Reserves Under Existing Third Party Reinsurance Contracts								1,200
Reinsurance premium paid to NICO under AEP Loss Portfolio Transfer								2,000
Net reinsurance receivables transferrred to NICO under AEP Loss Portfolio Transfer								215
Total consideration paid to NICO under AEP Loss Portfolio Transfer								$ 2,200
Net AEP adverse development before consideration of LPT	0	$ 200	$ 0	200	$ 150	$ 900
Cumulative amounts ceded under AEP Loss Portfolio Transfer	2,800			2,800			$ 2,600
Deferred reinsurance benefit yet to be recognized	347			347			241
Fair value of collateral trust account established by NICO under AEP Loss Portfolio Transfer	$ 2,500			$ 2,500			$ 2,800

XML

Claim and Claim Adjustment Expense Reserves (Net prior year development) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (132)	$ (175)	$ (282)	$ (187)
Pretax (favorable) unfavorable premium development, excluding Life & Group	(5)	(5)	(27)	(11)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(137)	(180)	(309)	(198)
Specialty [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(112)	(130)	(211)	(141)
Pretax (favorable) unfavorable premium development, excluding Life & Group	0	(2)	(18)	(10)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(112)	(132)	(229)	(151)
Commercial [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(5)	(11)	(37)	0
Pretax (favorable) unfavorable premium development, excluding Life & Group	(3)	(5)	(7)	(17)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(8)	(16)	(44)	(17)
International [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(15)	(34)	(34)	(46)
Pretax (favorable) unfavorable premium development, excluding Life & Group	(2)	2	(2)	16
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(17)	(32)	(36)	(30)
Corporate and Other Non-Core [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	0	0	0	0
Pretax (favorable) unfavorable premium development, excluding Life & Group	0	0	0	0
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	$ 0	$ 0	$ 0	$ 0

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Claim and Claim Adjustment Expense Reserves (Net prior year claim and allocated claim adjustment expense reserve development for Specialty segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (132)	$ (175)	$ (282)	$ (187)
Specialty [Member]
Medical Professional Liability	13	(19)	(17)	(11)
Other Professional Liability and Management Liability	(48)	(37)	(98)	(41)
Surety	(63)	(70)	(63)	(69)
Warranty	2	0	7	1
Other	(16)	(4)	(40)	(21)
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (112)	$ (130)	$ (211)	$ (141)

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Claim and Claim Adjustment Expense Reserves (Net prior year claim and allocated claim adjustment expense reserve development for Commercial segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (132)	$ (175)	$ (282)	$ (187)
Commercial [Member]
Commercial Auto	(12)	0	(47)	7
General Liability	14	3	(38)	8
Workers' Compensation	(6)	(1)	48	22
Property and Other	(1)	(13)	0	(37)
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (5)	$ (11)	$ (37)	$ 0

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Claim and Claim Adjustment Expense Reserves Net prior year claim and allocated claim adjustment expense reserve development for International segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (132)	$ (175)	$ (282)	$ (187)
International [Member]
Medical Professional Liability	(2)	(8)	(3)	(8)
Other Professional Liability	(1)	(11)	16	(16)
Liability	(2)	(5)	(21)	(12)
Property & Marine	(9)	(5)	(16)	(19)
Other	(1)	(5)	(10)	9
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (15)	$ (34)	$ (34)	$ (46)

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Claim and Claim Adjustment Expense Reserves Impact of Loss Portfolio Transfer on the Consolidated Statement of Operations (Details) - Loss Portfolio Transfer [Member] - USD ($) $ in Millions	3 Months Ended			9 Months Ended		48 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2013
Net AEP adverse development before consideration of LPT	$ 0	$ 200	$ 0	$ 200	$ 150	$ 900
Provision for uncollectible third-party reinsurance on AEP	0		0	0	0
Additional amounts ceded under LPT	0		0	200	150
Retroactive reinsurance benefit recognized	(12)		(4)	(94)	(75)
Pretax impact of deferred retroactive reinsurance benefit	$ (12)		$ (4)	$ 106	$ 75

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Benefit Plans (Components of net periodic cost (benefit)) (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 4
Interest cost on projected benefit obligation	29	29	85	85
Expected return on plan assets	(41)	(44)	(121)	(131)
Amortization of net actuarial (gain) loss	9	7	28	26
Net periodic (benefit) cost	$ (3)	$ (8)	$ (8)	$ (16)

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Commitments and Contingencies, and Guarantees (Narrative) (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Property Lease Guarantee [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 12
Guarantee and Indemnification [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Current Carrying Value	5	$ 5
Guarantee agreement [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	375
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	258
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,900

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Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ 210	$ 143	$ (315)	$ 400
Other comprehensive income (loss), before reclassifications	52	(118)	566	(385)
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	25	(35)	14	(45)
Other comprehensive income (loss) after tax (expense) benefit	27	(83)	552	(340)
Accumulated other comprehensive income (loss), ending balance	237	60	237	60
Reclassification from AOCI, Current Period, Tax	(12)	19	(4)	31
Tax (expense) benefit on other comprehensive income (loss)	(24)	18	(305)	113
Net unrealized gains (losses) on investments with OTTI losses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	31	31	27	36
Other comprehensive income (loss), before reclassifications	7	2	9	(3)
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	4	0	2	0
Other comprehensive income (loss) after tax (expense) benefit	3	2	7	(3)
Accumulated other comprehensive income (loss), ending balance	34	33	34	33
Reclassification from AOCI, Current Period, Tax	(2)	0	(1)	0
Tax (expense) benefit on other comprehensive income (loss)	(2)	(1)	(4)	1
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	934	689	390	942
Other comprehensive income (loss), before reclassifications	69	(67)	615	(318)
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	27	(31)	29	(29)
Other comprehensive income (loss) after tax (expense) benefit	42	(36)	586	(289)
Accumulated other comprehensive income (loss), ending balance	976	653	976	653
Reclassification from AOCI, Current Period, Tax	(13)	17	(12)	22
Tax (expense) benefit on other comprehensive income (loss)	(19)	21	(292)	140
Pension and postretirement benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(637)	(585)	(648)	(633)
Other comprehensive income (loss), before reclassifications	0	0	0	36
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(6)	(4)	(17)	(16)
Other comprehensive income (loss) after tax (expense) benefit	6	4	17	52
Accumulated other comprehensive income (loss), ending balance	(631)	(581)	(631)	(581)
Reclassification from AOCI, Current Period, Tax	3	2	9	9
Tax (expense) benefit on other comprehensive income (loss)	(3)	(2)	(9)	(28)
Cumulative foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(118)	8	(84)	55
Other comprehensive income (loss), before reclassifications	(24)	(53)	(58)	(100)
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	0	0	0	0
Other comprehensive income (loss) after tax (expense) benefit	(24)	(53)	(58)	(100)
Accumulated other comprehensive income (loss), ending balance	(142)	(45)	(142)	(45)
Reclassification from AOCI, Current Period, Tax	0	0	0	0
Tax (expense) benefit on other comprehensive income (loss)	$ 0	$ 0	$ 0	$ 0

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Business Segments (Income Statement Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Revenues
Net earned premiums	$ 1,767	$ 1,751	$ 5,196	$ 5,173
Net investment income	524	354	1,461	1,412
Other revenues	96	97	293	286
Total operating revenues	2,387	2,202	6,950	6,871
Claims, Benefits and Expenses
Net incurred claims and benefits	1,195	1,198	3,934	3,999
Policyholders' dividends	7	2	15	9
Amortization of deferred acquisition costs	314	319	926	936
Other insurance related expenses	295	263	842	790
Other expenses	147	138	439	388
Total claims, benefits and expenses	1,958	1,920	6,156	6,122
Operating income (loss) before income tax	429	282	794	749
Income tax (expense) benefit on operating income (loss)	(118)	(72)	(191)	(182)
Net operating income (loss)	311	210	603	567
Net realized investment gains (losses), pre-tax	46	(49)	26	(39)
Income tax (expense) benefit on net realized investment gains (losses)	(14)	17	(11)	21
Net realized investment gains (losses), after tax	32	(32)	15	(18)
Net Income (Loss)	343	178	618	549
Specialty [Member]
Operating Revenues
Net earned premiums	704	706	2,088	2,075
Net investment income	140	76	380	365
Other revenues	93	86	269	245
Total operating revenues	937	868	2,737	2,685
Claims, Benefits and Expenses
Net incurred claims and benefits	330	307	1,097	1,152
Policyholders' dividends	4	1	6	3
Amortization of deferred acquisition costs	151	150	443	440
Other insurance related expenses	77	67	225	202
Other expenses	78	73	232	209
Total claims, benefits and expenses	640	598	2,003	2,006
Operating income (loss) before income tax	297	270	734	679
Income tax (expense) benefit on operating income (loss)	(102)	(91)	(248)	(228)
Net operating income (loss)	195	179	486	451
Net realized investment gains (losses), pre-tax	9	(22)	2	(18)
Income tax (expense) benefit on net realized investment gains (losses)	(3)	8	(1)	7
Net realized investment gains (losses), after tax	6	(14)	1	(11)
Net Income (Loss)	201	165	487	440
Commercial [Member]
Operating Revenues
Net earned premiums	719	705	2,103	2,086
Net investment income	175	82	465	455
Other revenues	7	9	21	27
Total operating revenues	901	796	2,589	2,568
Claims, Benefits and Expenses
Net incurred claims and benefits	446	427	1,357	1,388
Policyholders' dividends	3	1	9	6
Amortization of deferred acquisition costs	118	118	351	352
Other insurance related expenses	151	128	422	385
Other expenses	9	10	25	23
Total claims, benefits and expenses	727	684	2,164	2,154
Operating income (loss) before income tax	174	112	425	414
Income tax (expense) benefit on operating income (loss)	(60)	(37)	(145)	(141)
Net operating income (loss)	114	75	280	273
Net realized investment gains (losses), pre-tax	12	(29)	2	(23)
Income tax (expense) benefit on net realized investment gains (losses)	(3)	8	0	7
Net realized investment gains (losses), after tax	9	(21)	2	(16)
Net Income (Loss)	123	54	282	257
International [Member]
Operating Revenues
Net earned premiums	210	203	605	601
Net investment income	13	13	38	40
Other revenues	0	1	1	0
Total operating revenues	223	217	644	641
Claims, Benefits and Expenses
Net incurred claims and benefits	117	106	395	336
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	45	45	132	125
Other insurance related expenses	33	33	98	101
Other expenses	1	9	17	9
Total claims, benefits and expenses	196	193	642	571
Operating income (loss) before income tax	27	24	2	70
Income tax (expense) benefit on operating income (loss)	(7)	(15)	(3)	(30)
Net operating income (loss)	20	9	(1)	40
Net realized investment gains (losses), pre-tax	6	(1)	14	1
Income tax (expense) benefit on net realized investment gains (losses)	(1)	1	(3)	0
Net realized investment gains (losses), after tax	5	0	11	1
Net Income (Loss)	25	9	10	41
Life and Group Non-Core [Member]
Operating Revenues
Net earned premiums	134	137	401	412
Net investment income	192	182	567	540
Other revenues	(4)	(1)	(1)	8
Total operating revenues	322	318	967	960
Claims, Benefits and Expenses
Net incurred claims and benefits	313	361	976	1,045
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	0	6	0	19
Other insurance related expenses	37	35	101	104
Other expenses	2	1	7	10
Total claims, benefits and expenses	352	403	1,084	1,178
Operating income (loss) before income tax	(30)	(85)	(117)	(218)
Income tax (expense) benefit on operating income (loss)	36	55	117	147
Net operating income (loss)	6	(30)	0	(71)
Net realized investment gains (losses), pre-tax	17	2	12	(2)
Income tax (expense) benefit on net realized investment gains (losses)	(6)	0	(9)	8
Net realized investment gains (losses), after tax	11	2	3	6
Net Income (Loss)	17	(28)	3	(65)
Corporate and Other Non-Core [Member]
Operating Revenues
Net earned premiums	0	0	0	0
Net investment income	4	1	11	12
Other revenues	0	4	3	9
Total operating revenues	4	5	14	21
Claims, Benefits and Expenses
Net incurred claims and benefits	(11)	(3)	109	78
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	0	0	0	0
Other insurance related expenses	(3)	0	(3)	(1)
Other expenses	57	47	158	140
Total claims, benefits and expenses	43	44	264	217
Operating income (loss) before income tax	(39)	(39)	(250)	(196)
Income tax (expense) benefit on operating income (loss)	15	16	88	70
Net operating income (loss)	(24)	(23)	(162)	(126)
Net realized investment gains (losses), pre-tax	2	1	(4)	3
Income tax (expense) benefit on net realized investment gains (losses)	(1)	0	2	(1)
Net realized investment gains (losses), after tax	1	1	(2)	2
Net Income (Loss)	(23)	(22)	(164)	(124)
Eliminations [Member]
Operating Revenues
Net earned premiums	0	0	(1)	(1)
Net investment income	0	0	0	0
Other revenues	0	(2)	0	(3)
Total operating revenues	0	(2)	(1)	(4)
Claims, Benefits and Expenses
Net incurred claims and benefits	0	0	0	0
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	0	0	0	0
Other insurance related expenses	0	0	(1)	(1)
Other expenses	0	(2)	0	(3)
Total claims, benefits and expenses	0	(2)	(1)	(4)
Operating income (loss) before income tax	0	0	0	0
Income tax (expense) benefit on operating income (loss)	0	0	0	0
Net operating income (loss)	0	0	0	0
Net realized investment gains (losses), pre-tax	0	0	0	0
Income tax (expense) benefit on net realized investment gains (losses)	0	0	0	0
Net realized investment gains (losses), after tax	0	0	0	0
Net Income (Loss)	$ 0	$ 0	$ 0	$ 0

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Business Segments (Balance Sheet Information) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Reinsurance receivables	$ 4,614	$ 4,491
Insurance receivables	2,281	2,129
Deferred acquisition costs	619	598
Goodwill	146	150
Insurance reserves
Claim and claim adjustment expenses	22,672	22,663
Unearned premiums	3,862	3,671
Future policy benefits	11,219	10,152
Specialty [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	805	724
Insurance receivables	991	890
Deferred acquisition costs	313	307
Goodwill	117	117
Insurance reserves
Claim and claim adjustment expenses	6,278	6,269
Unearned premiums	1,922	1,839
Future policy benefits	0	0
Commercial [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	635	639
Insurance receivables	1,018	993
Deferred acquisition costs	223	213
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	8,879	9,183
Unearned premiums	1,373	1,297
Future policy benefits	0	0
International [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	130	144
Insurance receivables	249	233
Deferred acquisition costs	83	78
Goodwill	29	33
Insurance reserves
Claim and claim adjustment expenses	1,408	1,347
Unearned premiums	432	415
Future policy benefits	0	0
Life and Group Non-Core [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	483	497
Insurance receivables	21	11
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	3,407	3,220
Unearned premiums	135	120
Future policy benefits	11,219	10,152
Corporate and Other Non-Core [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	2,561	2,487
Insurance receivables	2	2
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	2,700	2,644
Unearned premiums	0	0
Future policy benefits	0	0
Eliminations [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	0	0
Insurance receivables	0	0
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	0	0
Unearned premiums	0	0
Future policy benefits	$ 0	$ 0

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Business Segments (Revenues by Line of Business) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues	$ 2,433	$ 2,153	$ 6,976	$ 6,832
Specialty [Domain]
Revenues	946	846	2,739	2,667
Management & Professional Liability [Member]
Revenues	677	605	1,954	1,976
Surety [Member]
Revenues	139	132	399	377
Warranty & Alternative Risks [Member]
Revenues	130	109	386	314
Commercial [Domain]
Revenues	913	767	2,591	2,545
Middle Markets [Member]
Revenues	463	386	1,298	1,207
Small Business [Member]
Revenues	154	144	448	467
Other Commercial Insurance [Member]
Revenues	296	237	845	871
International [Domain]
Revenues	229	216	658	642
Canada [Member]
Revenues	51	52	152	161
CNA Europe [Member]
Revenues	82	78	241	232
Hardy [Member]
Revenues	96	86	265	249
Life and Group Non-Core [Member]
Revenues	339	320	979	958
Corporate and Other Non-Core [Member]
Revenues	6	6	10	24
Eliminations [Member]
Revenues	$ 0	$ (2)	$ (1)	$ (4)

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Organization Review Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Restructuring Charges		$ 20
Restructuring Costs	$ 11	$ 17

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Organization Review Costs by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 11	$ 17
Specialty [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	3	4
Commercial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	7	12
International [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0	0
Life and Group Non-Core [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1	1
Corporate and Other Non-Core [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 0	$ 0