CNA Financial (CNA) 10-Q 3 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2015	Oct. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	CNA FINANCIAL CORP
Entity Central Index Key	21,175
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		270,260,625

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Net earned premiums	$ 1,751	$ 1,810	$ 5,173	$ 5,427
Net investment income	354	480	1,412	1,556
Net realized investment gains (losses):
Other-than-temporary impairment losses	(56)	(10)	(99)	(17)
Portion of other-than-temporary impairments recognized in Other comprehensive income	0	0	0	0
Net other-than-temporary impairment losses recognized in earnings	(56)	(10)	(99)	(17)
Other net realized investment gains (loss)	7	47	60	86
Net realized investment gains (losses)	(49)	37	(39)	69
Other revenues	97	84	286	262
Total revenues	2,153	2,411	6,832	7,314
Claims, Benefits and Expenses
Insurance claims and policyholders' benefits	1,200	1,354	4,008	4,241
Amortization of deferred acquisition costs	319	332	936	996
Other operating expenses	362	384	1,061	984
Interest	39	48	117	138
Total claims, benefits and expenses	1,920	2,118	6,122	6,359
Income (loss) from continuing operations before income tax	233	293	710	955
Income tax (expense) benefit	(55)	(84)	(161)	(265)
Net income (loss) from continuing operations	178	209	549	690
(Loss) income from discontinued operations, net of income tax benefit (expense)	0	4	0	(197)
Net income (loss)	$ 178	$ 213	$ 549	$ 493
Basic Earnings (Loss) Per Share Attributable to CNA
Income from continuing operations	$ 0.66	$ 0.77	$ 2.03	$ 2.56
(Loss) income from discontinued operations	0	0.02	0	(0.73)
Basic earnings per share	0.66	0.79	2.03	1.83
Diluted Earnings (Loss) Per Share Attributable to CNA
Income (loss) from continuing operations	0.66	0.77	2.03	2.55
(Loss) income from discontinued operations	0	0.02	0	(0.73)
Diluted earnings (loss) per share	0.66	0.79	2.03	1.82
Common Stock, Dividends, Per Share, Declared	$ 0.25	$ 0.25	$ 2.75	$ 1.75
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	270.3	269.9	270.2	269.9
Diluted	270.8	270.6	270.7	270.6

Consolidated Statements of Ope3

Consolidated Statements of Operations Parenthetical (Parentheticals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Income tax (expense) benefit on discontinued operations	$ 0	$ (3)	$ 0	$ 34

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss), Net of Tax, Changes In:
Net unrealized gains (losses) on investments with other-than-temporary impairments	$ 2	$ 1	$ (3)	$ 15
Net unrealized gains (losses) on other investments	(36)	(83)	(289)	424
Net unrealized gains (losses) on investments	(34)	(82)	(292)	439
Net unrealized gains (losses) on discontinued operations	0	(37)	0	(22)
Foreign currency translation adjustment	(53)	(73)	(100)	(39)
Pension and postretirement benefits	4	3	52	(47)
Other comprehensive income (loss)	(83)	(189)	(340)	331
Net income (loss)	178	213	549	493
Total comprehensive income (loss)	$ 95	$ 24	$ 209	$ 824

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Assets
Fixed maturity securities at fair value	$ 40,201	$ 40,768
Equity securities at fair value	212	222
Limited partnership investments	2,738	2,937
Other invested assets	45	41
Mortgage loans	640	588
Short term investments	1,482	1,706
Total investments	45,318	46,262
Cash	236	190
Reinsurance receivables	4,491	4,694
Insurance receivables	2,057	1,936
Accrued investment income	439	405
Deferred acquisition costs	606	600
Deferred income taxes	279	191
Property and equipment at cost	320	295
Goodwill	151	152
Other assets	915	841
Total assets	54,812	55,566
Liabilities
Claim and claim adjustment expenses	22,867	23,271
Unearned premiums	3,706	3,592
Future policy benefits	9,520	9,490
Policyholders’ funds	0	27
Short term Debt	350	0
Long term debt	2,211	2,559
Other liabilities	3,893	3,833
Total liabilities	42,547	42,772
Stockholders' Equity
Common stock	683	683
Additional paid-in capital	2,150	2,151
Retained earnings	9,450	9,645
Accumulated other comprehensive income (loss)	60	400
Treasury stock	(78)	(84)
Notes receivable for the issuance of common stock	0	(1)
Total stockholders’ equity	12,265	12,794
Total liabilities and stockholders' equity	$ 54,812	$ 55,566

Consolidated Balance Sheet Pare

Consolidated Balance Sheet Parentheticals (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed maturities securities at amortized cost	$ 37,568	$ 37,335
Equity securities at cost	207	210
Reinsurance Recoverables, Allowance	48	48
Premiums Receivable, Allowance for Doubtful Accounts	54	61
Accumulated depreciation on property and equipment	387	364
Due to Related Parties	$ 119	$ 153
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	270,260,625	269,980,202
Treasury stock, shares	2,779,618	3,060,041

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities
Net income (loss)	$ 549	$ 493
Adjustments to reconcile net income (loss) to net cash flows provided (used) by operating activities
Loss on sale of subsidiaries	0	251
Deferred income tax expense (benefit)	27	81
Trading portfolio activity	17	16
Net realized investment (gains) losses	39	(72)
Equity method investees	127	65
Net amortization of investments	(17)	(1)
Depreciation and amortization	62	62
Changes in:
Receivables, net	70	611
Accrued investment income	(34)	(37)
Deferred acquisition costs	11	14
Insurance reserves	195	(222)
Other assets	(61)	(49)
Other liabilities	(32)	(133)
Other, net	92	(32)
Total adjustments	496	554
Net cash flows provided (used) by operating activities	1,045	1,047
Dispositions:
Fixed maturity securities - sales	3,590	4,005
Fixed maturity securities - maturities, calls and redemptions	3,101	2,901
Equity securities	43	23
Limited partnerships	156	133
Mortgage loans	22	36
Purchases:
Fixed maturity securities	(7,055)	(7,457)
Equity securities	(60)	(44)
Limited partnerships	(120)	(218)
Mortgage Loans	(81)	(84)
Change in other investments	5	10
Change in short term investments	222	(556)
Purchases of property and equipment	(84)	(42)
Proceeds from sale of subsidiaries	0	198
Other, net	7	8
Net cash flows provided (used) by investing activities	(254)	(1,087)
Cash Flows from Financing Activities
Dividends paid to common stockholders	(744)	(473)
Proceeds from the issuance of debt	0	546
Other, net	5	22
Net cash flows provided (used) by financing activities	(739)	95
Effect of foreign exchange rate changes on cash	(6)	(3)
Net change in cash	46	52
Cash, beginning of year	190	195
Cash, end of period	$ 236	$ 247

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity $ in Millions	USD ($)
Balance, beginning of year at Dec. 31, 2013	$ 683
Balance, end of period at Sep. 30, 2014	683
Balance, beginning of year at Dec. 31, 2013	2,145
Additional Paid-in Capital
Stock-based compensation	4
Balance, end of period at Sep. 30, 2014	2,149
Balance, beginning of year at Dec. 31, 2013	9,495
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(473)
Net income (loss)	493
Balance, end of period at Sep. 30, 2014	9,515
Accumulated other comprehensive income (loss), beginning balance at Dec. 31, 2013	442
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss)	331
Accumulated other comprehensive income (loss), ending balance at Sep. 30, 2014	773
Balance, beginning of year at Dec. 31, 2013	(91)
Treasury Stock
Stock Based Compensation and Other	6
Balance, end of period at Sep. 30, 2014	(85)
Balance, beginning of year at Dec. 31, 2013	(23)
Notes Receivable for the Issuance of Common Stock
Decrease (increase) in notes receivable from the issuance of common stock	22
Balance, end of period at Sep. 30, 2014	(1)
Balance, end of period at Sep. 30, 2014	683
Balance, end of period at Sep. 30, 2014	2,149
Retained Earnings (Accumulated Deficit)
Net income (loss)	213
Balance, end of period at Sep. 30, 2014	9,515
Accumulated other comprehensive income (loss), beginning balance at Jun. 30, 2014	962
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss)	(189)
Accumulated other comprehensive income (loss), ending balance at Sep. 30, 2014	773
Balance, end of period at Sep. 30, 2014	(85)
Balance, end of period at Sep. 30, 2014	(1)
Notes Receivable for the Issuance of Common Stock
Total stockholders’ equity	13,034
Total stockholders’ equity	12,794
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 from the issuance of 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 stockholders’ equity	$ 12,265

General

General	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation, Basis of Presentation, Business Description of 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, 2015 . 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, 2014 , 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 as of the date of the Condensed Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting periods. Actual results may differ from those estimates. The interim financial data as of September 30, 2015 and for the three and nine months ended September 30, 2015 and 2014 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. Sale of Continental Assurance Company (CAC) On August 1, 2014, the Company completed the sale of the common stock of CAC, the Company's former life insurance subsidiary. The Company elected to include CAC cash flow activity in the comparative Condensed Consolidated Statement of Cash Flows. Further information on discontinued operations is provided in Note K to the Condensed Consolidated Financial Statements. In connection with the sale of CAC, the Company entered into a 100% coinsurance agreement on a separate small block of annuity business outside of CAC. As a result of the coinsurance agreement, the $34 million difference between market value and book value of the funds withheld assets at the coinsurance contract's inception was recognized as a loss in Other operating expenses in the third quarter of 2014. Recently Issued Accounting Standards Update (ASU) - Disclosures about Short-Duration Contracts In May of 2015, the Financial Accounting Standards Board 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 updated guidance is effective for annual financial statements issued for fiscal years 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.

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share	9 Months Ended
	Sep. 30, 2015
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 ended September 30, 2015 , approximately 514 thousand and 545 thousand potential shares attributable to exercises 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 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 ended September 30, 2014 , approximately 668 thousand and 654 thousand potential shares attributable to exercises under stock-based employee compensation plans were included in the calculation of diluted earnings per share. For those same periods, approximately 180 thousand and 167 thousand potential shares attributable to exercises under stock-based employee compensation plans were not included in the calculation of diluted earnings per share because the effect would have been antidilutive.

Investments

Investments	9 Months Ended
	Sep. 30, 2015
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) 2015 2014 2015 2014 Fixed maturity securities $ 449 $ 453 $ 1,344 $ 1,356 Equity securities 3 2 9 7 Limited partnership investments (93 ) 29 69 199 Mortgage loans 8 7 25 22 Short term investments 2 1 4 2 Trading portfolio 1 2 6 8 Other 1 — 1 3 Gross investment income 371 494 1,458 1,597 Investment expense (17 ) (14 ) (46 ) (41 ) Net investment income $ 354 $ 480 $ 1,412 $ 1,556 Net realized investment gains (losses) are presented in the following table. Periods ended September 30 Three Months Nine Months (In millions) 2015 2014 2015 2014 Net realized investment gains (losses): Fixed maturity securities: Gross realized gains $ 22 $ 51 $ 91 $ 124 Gross realized losses (51 ) (12 ) (120 ) (66 ) Net realized investment gains (losses) on fixed maturity securities (29 ) 39 (29 ) 58 Equity securities: Gross realized gains 1 1 2 6 Gross realized losses (19 ) (4 ) (21 ) (4 ) Net realized investment gains (losses) on equity securities (18 ) (3 ) (19 ) 2 Derivative financial instruments (1 ) — 9 1 Short term investments and other (1 ) 1 — 8 Net realized investment gains (losses) $ (49 ) $ 37 $ (39 ) $ 69 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) 2015 2014 2015 2014 Fixed maturity securities available-for-sale: Corporate and other bonds $ 36 $ 6 $ 52 $ 9 States, municipalities and political subdivisions — — 18 — Asset-backed: Residential mortgage-backed 1 2 7 4 Other asset-backed — — 1 1 Total asset-backed 1 2 8 5 Total fixed maturity securities available-for-sale 37 8 78 14 Equity securities available-for-sale -- Common stock 19 2 20 3 Short term investments — — 1 — Net OTTI losses recognized in earnings $ 56 $ 10 $ 99 $ 17 The following tables present a summary of fixed maturity and equity securities. September 30, 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 $ 17,155 $ 1,237 $ 207 $ 18,185 $ — States, municipalities and political subdivisions 11,978 1,336 17 13,297 (5 ) Asset-backed: Residential mortgage-backed 4,850 204 13 5,041 (46 ) Commercial mortgage-backed 2,183 77 9 2,251 — Other asset-backed 1,009 11 4 1,016 — Total asset-backed 8,042 292 26 8,308 (46 ) U.S. Treasury and obligations of government-sponsored enterprises 24 5 — 29 — Foreign government 333 12 1 344 — Redeemable preferred stock 33 2 — 35 — Total fixed maturity securities available-for-sale 37,565 2,884 251 40,198 $ (51 ) Total fixed maturity securities trading 3 3 Equity securities available-for-sale: Common stock 62 3 — 65 Preferred stock 145 4 2 147 Total equity securities available-for-sale 207 7 2 212 Total $ 37,775 $ 2,891 $ 253 $ 40,413 December 31, 2014 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 $ 17,210 $ 1,721 $ 61 $ 18,870 $ — States, municipalities and political subdivisions 11,285 1,463 8 12,740 — Asset-backed: Residential mortgage-backed 5,028 218 13 5,233 (53 ) Commercial mortgage-backed 2,056 93 5 2,144 (2 ) Other asset-backed 1,234 11 10 1,235 — Total asset-backed 8,318 322 28 8,612 (55 ) U.S. Treasury and obligations of government-sponsored enterprises 26 5 — 31 — Foreign government 438 16 — 454 — Redeemable preferred stock 39 3 — 42 — Total fixed maturity securities available-for-sale 37,316 3,530 97 40,749 $ (55 ) Total fixed maturity securities trading 19 19 Equity securities available-for-sale: Common stock 38 9 — 47 Preferred stock 172 5 2 175 Total equity securities available-for-sale 210 14 2 222 Total $ 37,545 $ 3,544 $ 99 $ 40,990 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. As of September 30, 2015 and December 31, 2014 , the net unrealized gains on investments included in AOCI were net of after-tax Shadow Adjustments of $1,046 million and $1,288 million . 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 decrease in Deferred acquisition costs and/or increase in Insurance reserves are recorded, net of tax, as a reduction of net unrealized gains through Other comprehensive income (loss) (Shadow Adjustments). 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, 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 $ 3,744 $ 177 $ 188 $ 30 $ 3,932 $ 207 States, municipalities and political subdivisions 655 11 131 6 786 17 Asset-backed: Residential mortgage-backed 308 3 211 10 519 13 Commercial mortgage-backed 479 6 81 3 560 9 Other asset-backed 354 4 9 — 363 4 Total asset-backed 1,141 13 301 13 1,442 26 U.S. Treasury and obligations of government-sponsored enterprises 1 — — — 1 — Foreign government 23 — 3 1 26 1 Redeemable preferred stock 3 — — — 3 — Total fixed maturity securities available-for-sale 5,567 201 623 50 6,190 251 Equity securities available-for-sale: Preferred stock 3 — 14 2 17 2 Total $ 5,570 $ 201 $ 637 $ 52 $ 6,207 $ 253 Less than 12 Months 12 Months or Longer Total December 31, 2014 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 $ 1,330 $ 46 $ 277 $ 15 $ 1,607 $ 61 States, municipalities and political subdivisions 335 5 127 3 462 8 Asset-backed: Residential mortgage-backed 293 5 189 8 482 13 Commercial mortgage-backed 264 2 99 3 363 5 Other asset-backed 607 10 7 — 614 10 Total asset-backed 1,164 17 295 11 1,459 28 U.S. Treasury and obligations of government-sponsored enterprises 3 — 4 — 7 — Foreign government 3 — 3 — 6 — Redeemable preferred stock 3 — — — 3 — Total fixed maturity securities available-for-sale 2,838 68 706 29 3,544 97 Equity securities available-for-sale: Preferred stock 17 2 1 — 18 2 Total $ 2,855 $ 70 $ 707 $ 29 $ 3,562 $ 99 Based on current facts and circumstances, the Company believes the unrealized losses presented in the September 30, 2015 table above are not indicative of the ultimate collectibility of the current amortized cost of the securities, but rather are primarily attributable to changes in interest rates and 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, 2015 . 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, 2015 and 2014 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) 2015 2014 2015 2014 Beginning balance of credit losses on fixed maturity securities $ 59 $ 66 $ 62 $ 74 Reductions for securities sold during the period (2 ) (2 ) (5 ) (7 ) Reductions for securities the Company intends to sell or more likely than not will be required to sell — — — (3 ) Ending balance of credit losses on fixed maturity securities $ 57 $ 64 $ 57 $ 64 Contractual Maturity The following table presents available-for-sale fixed maturity securities by contractual maturity. September 30, 2015 December 31, 2014 (In millions) Cost or Amortized Cost Estimated Fair Value Cost or Amortized Cost Estimated Fair Value Due in one year or less $ 1,406 $ 1,425 $ 2,479 $ 2,511 Due after one year through five years 7,772 8,186 9,054 9,605 Due after five years through ten years 14,149 14,577 12,055 12,584 Due after ten years 14,238 16,010 13,728 16,049 Total $ 37,565 $ 40,198 $ 37,316 $ 40,749 Actual maturities may differ from contractual maturities because certain securities may be called or prepaid with or without call or prepayment penalties. Securities not due at a single date are allocated based on weighted average life. Derivative Financial Instruments The following tables present the aggregate contractual or notional amounts and estimated fair values related to derivative financial instruments. September 30, 2015 Contractual/ Notional Amount Estimated Fair Value (In millions) Asset Liability Without hedge designation Equity warrants $ 5 $ — $ — Embedded derivative on funds withheld liability 182 — (5 ) Total $ — $ (5 ) December 31, 2014 Contractual/ Notional Amount Estimated Fair Value (In millions) Asset Liability Without hedge designation Currency forwards $ 9 $ — $ — Equity warrants 5 — — Embedded derivative on funds withheld liability 184 — 3 Total $ — $ 3 Derivative financial instruments are presented gross in Other invested assets and Other liabilities on the Condensed Consolidated Balance Sheets. There would be no significant difference in the balance included in such accounts if the estimated fair values were presented net as of September 30, 2015 and December 31, 2014 . 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, 2015 , the Company had committed approximately $414 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, 2015 , the Company had mortgage loan commitments of $29 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. As of September 30, 2015 , the Company had commitments to purchase or fund additional amounts of $81 million and sell $43 million under the terms of such securities.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2015
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, 2015 Total Assets/Liabilities at Fair Value (In millions) Level 1 Level 2 Level 3 Assets Fixed maturity securities: Corporate and other bonds $ 28 $ 18,007 $ 153 $ 18,188 States, municipalities and political subdivisions — 13,236 61 13,297 Asset-backed: Residential mortgage-backed — 4,837 204 5,041 Commercial mortgage-backed — 2,180 71 2,251 Other asset-backed — 545 471 1,016 Total asset-backed — 7,562 746 8,308 U.S. Treasury and obligations of government-sponsored enterprises 28 1 — 29 Foreign government 28 316 — 344 Redeemable preferred stock 24 11 — 35 Total fixed maturity securities 108 39,133 960 40,201 Equity securities 154 43 15 212 Other invested assets — 45 — 45 Short term investments 624 773 — 1,397 Life settlement contracts, included in Other assets — — 74 74 Total assets $ 886 $ 39,994 $ 1,049 $ 41,929 Liabilities Other liabilities $ — $ (5 ) $ — $ (5 ) Total liabilities $ — $ (5 ) $ — $ (5 ) December 31, 2014 Total Assets/Liabilities at Fair Value (In millions) Level 1 Level 2 Level 3 Assets Fixed maturity securities: Corporate and other bonds $ 32 $ 18,695 $ 162 $ 18,889 States, municipalities and political subdivisions — 12,646 94 12,740 Asset-backed: Residential mortgage-backed — 5,044 189 5,233 Commercial mortgage-backed — 2,061 83 2,144 Other asset-backed — 580 655 1,235 Total asset-backed — 7,685 927 8,612 U.S. Treasury and obligations of government-sponsored enterprises 28 3 — 31 Foreign government 41 413 — 454 Redeemable preferred stock 30 12 — 42 Total fixed maturity securities 131 39,454 1,183 40,768 Equity securities 145 61 16 222 Other invested assets — 41 — 41 Short term investments 681 963 — 1,644 Life settlement contracts, included in Other assets — — 82 82 Total assets $ 957 $ 40,519 $ 1,281 $ 42,757 Liabilities Other liabilities $ — $ 3 $ — $ 3 Total liabilities $ — $ 3 $ — $ 3 The following tables 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, 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 July 1, 2014 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, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 194 $ — $ (1 ) $ 4 $ — $ (3 ) $ — $ (21 ) $ 173 $ — States, municipalities and political subdivisions 79 — 1 — — — — — 80 — Asset-backed: Residential mortgage-backed 185 1 — — — (17 ) 11 (20 ) 160 — Commercial mortgage-backed 59 2 (2 ) 28 — (21 ) 31 — 97 — Other asset-backed 626 1 (4 ) 80 — (25 ) — (36 ) 642 — Total asset-backed 870 4 (6 ) 108 — (63 ) 42 (56 ) 899 — Total fixed maturity securities 1,143 4 (6 ) 112 — (66 ) 42 (77 ) 1,152 — Equity securities 2 — (1 ) 16 — — — — 17 — Life settlement contracts 86 1 — — — (1 ) — — 86 1 Total $ 1,231 $ 5 $ (7 ) $ 128 $ — $ (67 ) $ 42 $ (77 ) $ 1,255 $ 1 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 $ — Level 3 (In millions) Balance as of January 1, 2014 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, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 204 $ 2 $ — $ 30 $ (10 ) $ (13 ) $ 8 $ (48 ) $ 173 $ — States, municipalities and political subdivisions 71 1 3 1 (10 ) — 14 — 80 — Asset-backed: Residential mortgage-backed 331 (22 ) 62 47 (174 ) (57 ) 32 (59 ) 160 — Commercial mortgage-backed 151 4 (2 ) 28 (60 ) (23 ) 43 (44 ) 97 — Other asset-backed 446 2 — 457 (111 ) (115 ) — (37 ) 642 (1 ) Total asset-backed 928 (16 ) 60 532 (345 ) (195 ) 75 (140 ) 899 (1 ) Total fixed maturity securities 1,203 (13 ) 63 563 (365 ) (208 ) 97 (188 ) 1,152 (1 ) Equity securities 11 3 (5 ) 16 (8 ) — — — 17 — Life settlement contracts 88 23 — — — (25 ) — — 86 3 Separate account business 1 — — — — — — (1 ) — — Total $ 1,303 $ 13 $ 58 $ 579 $ (373 ) $ (233 ) $ 97 $ (189 ) $ 1,255 $ 2 Net realized and unrealized gains and losses, including those shown above, 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 Net realized investment gains (losses) Fixed maturity securities trading Net investment income Equity securities 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) Other invested assets - Overseas deposits Net investment income Life settlement contracts Other revenues Other liabilities - Derivative financial instruments Net realized investment gains (losses) 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 ended September 30, 2015 there were $10 million of transfers from Level 2 to Level 1 and no transfers from Level 1 to Level 2. During the three months ended September 30, 2014 there were no transfers between Level 1 and Level 2. During the nine months ended September 30, 2014 , there were $24 million of transfers from Level 2 to Level 1 and $1 million 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 exchange traded bonds, highly liquid U.S. and foreign government 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 generally 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 priced using internal models with inputs that are not market observable. Derivative Financial Investments Level 2 securities primarily include the embedded derivative on funds withheld liability and currency forwards. 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. Currency forwards are valued using observable market forward rates. Overseas Deposits Overseas deposits, which can be redeemed at net asset value in 90 days or less, are classified as Level 2. 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 classified 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. Significant Unobservable Inputs The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurements of Level 3 assets. Valuations for assets and liabilities not presented in the table 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, 2015 Estimated Fair Value (In millions) Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Fixed maturity securities $ 121 Discounted cash flow Credit spread 2% - 31% (3%) Life settlement contracts 74 Discounted cash flow Discount rate risk premium 9% Mortality assumption 55% - 1676% (164%) December 31, 2014 Estimated Fair Value Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Fixed maturity securities $ 101 Discounted cash flow Credit spread 2% - 13% (3%) Equity securities 16 Market approach Private offering price $12 - $4,391 per share ($600) Life settlement contracts 82 Discounted cash flow Discount rate risk premium 9% Mortality assumption 55% - 1676% (163%) For fixed maturity securities, an increase to the credit spread assumptions would result in a lower fair value measurement. For equity securities, an increase in the private offering price would result in a higher 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, 2015 Carrying Amount Estimated Fair Value (In millions) Level 1 Level 2 Level 3 Total Assets Mortgage loans $ 640 $ — $ — $ 660 $ 660 Liabilities Short term debt $ 350 $ — $ 366 $ — $ 366 Long term debt 2,211 — 2,478 — 2,478 December 31, 2014 Carrying Estimated Fair Value (In millions) Level 1 Level 2 Level 3 Total Assets Notes receivable for the issuance of common stock $ 1 $ — $ — $ 1 $ 1 Mortgage loans 588 — — 608 608 Liabilities Long term debt $ 2,559 $ — $ 2,883 $ — $ 2,883 The following methods and assumptions were used to estimate the fair value of these financial assets and liabilities. The fair values of Mortgage loans were 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.

Claim and Claim Adjustment Expe

Claim and Claim Adjustment Expense Reserves	9 Months Ended
	Sep. 30, 2015
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 claims 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 can contribute 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 $14 million and $103 million for the three and nine months ended September 30, 2015 . Catastrophe losses in 2015 related primarily to U.S. weather-related events. The Company reported catastrophe losses, net of reinsurance, of $17 million and $147 million for the three and nine months ended September 30, 2014 . Net Prior Year Development The following tables and discussion present net prior year development recorded for Specialty, Commercial, International and Corporate & Other Non-Core segments. 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 ) Three months ended September 30, 2014 (In millions) Specialty Commercial International Corporate & Other Non-Core Total Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (79 ) $ 71 $ (17 ) $ (1 ) $ (26 ) Pretax (favorable) unfavorable premium development (4 ) — 7 — 3 Total pretax (favorable) unfavorable net prior year development $ (83 ) $ 71 $ (10 ) $ (1 ) $ (23 ) 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 ) Nine months ended September 30, 2014 (In millions) Specialty Commercial International Corporate & Other Non-Core Total Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (123 ) $ 179 $ (32 ) $ (1 ) $ 23 Pretax (favorable) unfavorable premium development (12 ) (24 ) 6 — (30 ) Total pretax (favorable) unfavorable net prior year development $ (135 ) $ 155 $ (26 ) $ (1 ) $ (7 ) 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) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ (19 ) $ 16 $ (11 ) $ 17 Other Professional Liability and Management Liability (37 ) (9 ) (41 ) (59 ) Surety (70 ) (79 ) (69 ) (78 ) Warranty — — 1 — Other (4 ) (7 ) (21 ) (3 ) Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (130 ) $ (79 ) $ (141 ) $ (123 ) Three Months 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 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. 2014 Unfavorable development for medical professional liability was primarily related to increased frequency of large medical products liability class action lawsuits in accident years 2012 and prior. Favorable development for surety coverages was primarily due to lower than expected frequency of large losses in accident years 2012 and prior. Nine Months 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. 2014 Unfavorable development for medical professional liability was primarily related to increased frequency of large medical products liability class action lawsuits in accident years 2012 and prior. Favorable development for other professional liability and management liability was primarily related to favorable outcomes on individual large claims in accident years 2009 and prior, which contributed to a lower estimate of ultimate severity. Additionally, there was better than expected severity in accident years 2008 through 2011. Favorable development for surety coverages was primarily due to lower than expected frequency of large losses in accident years 2012 and prior. Commercial The following table presents further detail of the development recorded for the Commercial segment. A significant amount of the unfavorable development for the nine months ended September 30, 2014 relates to business classes which the Company has exited, but also includes Small Business where the Company has taken underwriting actions in an effort to improve profitability. Periods ended September 30 Three Months Nine Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Commercial Auto $ — $ 13 $ 7 $ 52 General Liability 3 44 8 76 Workers' Compensation (1 ) 25 22 75 Property and Other (13 ) (11 ) (37 ) (24 ) Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (11 ) $ 71 $ — $ 179 Three Months 2015 Favorable development for property and other was primarily due to better than expected loss emergence on catastrophe events in accident year 2014. 2014 Overall, unfavorable development for general liability coverages was primarily related to higher than expected severity in accident years 2010, 2011 and 2013. Favorable development was recorded primarily related to lower than expected frequency of large losses in accident years 2005 through 2008. Overall, unfavorable development for workers’ compensation was primarily related to increased medical severity in accident years 2010 and prior and higher than expected severity related to Defense Base Act (DBA) contractors in accident years 2010 through 2013. Favorable development of $26 million was recorded in accident years 1996 and prior related to the commutation of a workers' compensation reinsurance pool. Favorable development for property and other first-party coverages was recorded in accident years 2010 and prior, primarily related to lower than expected frequency and favorable individual claim settlements. Nine Months 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. 2014 Unfavorable development for commercial auto was primarily related to increased claim frequency of large losses in accident years 2010 through 2013. Overall, unfavorable development for general liability was primarily related to higher than expected severity in accident years 2009 through 2011. In addition, there was higher than expected severity in accident year 2013 related to Small Business. Favorable development was recorded primarily related to lower than expected frequency of large losses in accident years 2005 through 2008. Overall, unfavorable development for workers’ compensation was primarily due to increased medical severity in accident years 2010 and prior, higher than expected severity related to DBA contractors in accident years 2010 through 2013 and the recognition of losses related to favorable premium development in accident year 2013. Favorable development of $26 million was recorded in accident years 1996 and prior related to the commutation of a workers' compensation reinsurance pool. Overall, favorable development for property and other coverages in accident years 2011 and prior primarily related to lower than expected frequency and favorable individual claim settlements. Additionally, there was favorable development due to better than expected loss emergence in catastrophe losses in accident year 2013. Unfavorable development was recorded in accident year 2012 primarily related to higher than expected loss emergence in catastrophe losses. 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) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ (8 ) $ (3 ) $ (8 ) $ (2 ) Other Professional Liability (11 ) 1 (16 ) (14 ) Liability (5 ) (3 ) (12 ) (9 ) Property & Marine (5 ) (11 ) (19 ) (10 ) Other (5 ) (1 ) 9 (7 ) Commutations — — — 10 Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (34 ) $ (17 ) $ (46 ) $ (32 ) Three Months 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. 2014 Favorable development for property and marine coverages was primarily related to better than expected severity in accident year 2013. Nine Months 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. 2014 Favorable development for other professional liability was primarily related to lower than expected severity in accident years 2011 and prior. Favorable development for property and marine coverages was primarily related to better than expected severity in accident year 2013. Reinsurance commutations in the first quarter of 2014 reduced ceded losses from prior years. Overall the commutations increased net operating income because of the release of the related allowance for uncollectible reinsurance. 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 (Loss Portfolio Transfer or LPT). At the transaction effective date, 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 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 recorded $0.9 billion of additional amounts ceded under LPT. As a result, the cumulative amounts ceded under the Loss Portfolio Transfer exceeded the $2.2 billion consideration paid, resulting in a deferred retroactive reinsurance gain. This deferred gain is recognized in earnings in proportion to actual recoveries under the Loss Portfolio Transfer. Over the life of the contract, there is no economic impact as long as any additional losses are within the limit under the contract. In a period in which the estimate of ceded losses is changed, the required change to the deferred gain is cumulatively recognized in earnings as if the revised estimate was available at the inception of the LPT. The following table displays the impact of the Loss Portfolio Transfer on the Condensed Consolidated Statements of Operations. Periods ended September 30 Three Months Nine Months (In millions) 2015 2014 2015 2014 Net A&EP adverse development before consideration of LPT $ — $ — $ 150 $ — Provision for uncollectible third-party reinsurance on A&EP — — — — Additional amounts ceded under LPT — — 150 — Retroactive reinsurance benefit recognized (4 ) (4 ) (75 ) (9 ) Pretax impact of deferred retroactive reinsurance benefit $ (4 ) $ (4 ) $ 75 $ (9 ) The fourth quarter of 2014 A&EP reserve review was not completed in 2014 because additional information and analysis on inuring third-party reinsurance recoveries were needed to finalize the review. The review was finalized in the second quarter of 2015 . Unfavorable development was due to a decrease in anticipated future reinsurance recoveries related to asbestos claims and higher than expected severity on pollution claims. The effect of the deferred retroactive reinsurance benefit is recorded in Insurance claims and policyholders' benefits in the Condensed Consolidated Statement of Operations. As of September 30, 2015 and December 31, 2014, the cumulative amounts ceded under the LPT were $2.6 billion and $2.5 billion . The unrecognized deferred retroactive reinsurance benefit was $251 million and $176 million as of September 30, 2015 and December 31, 2014 . NICO established a collateral trust account as security for its obligations to the Company. The fair value of the collateral trust account was $2.8 billion and $3.4 billion as of September 30, 2015 and December 31, 2014 . 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.

Legal Proceedings and Contingen

Legal Proceedings and Contingent Liabilities	9 Months Ended
	Sep. 30, 2015
Legal Proceedings and Contingent Liabilities [Abstract]
Legal Proceedings and Contingent Liabilities	Note F . Legal Proceedings and Contingent Liabilities The Company is a party to routine litigation incidental to its business, which, based on the facts and circumstances currently known, is not material to the Condensed Consolidated Financial Statements.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2015
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) 2015 2014 2015 2014 Pension cost (benefit) Service cost $ — $ 3 $ 4 $ 7 Interest cost on projected benefit obligation 29 33 85 99 Expected return on plan assets (44 ) (48 ) (131 ) (144 ) Amortization of net actuarial loss 7 6 26 19 Net periodic pension cost (benefit) $ (8 ) $ (6 ) $ (16 ) $ (19 ) Postretirement cost (benefit) Interest cost on projected benefit obligation $ — $ — $ — $ 1 Amortization of prior service credit (1 ) — (2 ) (9 ) Amortization of net actuarial loss — — 1 — Curtailment gain — — — (86 ) Net periodic postretirement cost (benefit) $ (1 ) $ — $ (1 ) $ (94 ) In the second quarter of 2015 , the Company eliminated future benefit accruals associated with the CNA Retirement Plan (Plan) effective June 30, 2015. Employees who were continuing to accrue under this Plan up until that date are entitled to an accrued benefit payable based on their eligible compensation and accrued service through June 30, 2015, in accordance with the terms of the Plan. Starting with the first pay period after July 1, 2015, affected employees began receiving enhanced employer contributions in the CNA 401(k) Plus Plan similar to employees who elected to cease accruals effective December 31, 1999. Employees who elected to cease accruals effective December 31, 1999 are not affected by this curtailment. This curtailment resulted in a $55 million decrease in the Plan benefit obligation liability and a reduction of the unrecognized actuarial losses included in AOCI. In connection with the curtailment, the Company remeasured the plan benefit obligation which resulted in an increase in the discount rate used to determine the benefit obligation from 3.85% to 4.00% . In the second quarter of 2014 , the Company eliminated certain postretirement medical benefits associated with the CNA Health and Group Benefits Program. This change was a negative plan amendment that resulted in an $86 million curtailment gain which was included in Other operating expenses within the Corporate & Other Non-Core segment. In connection with the plan amendment, the Company remeasured the plan benefit obligation which resulted in a decrease in the discount rate used to determine the benefit obligation from 3.60% to 3.10% .

Commitments, Contingencies, and

Commitments, Contingencies, and Guarantees	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies, and Guarantees	Note H . Commitments, Contingencies and Guarantees Commitments and Contingencies The Company holds an investment in a real estate joint venture. In the normal course of business, the Company, on a joint and several basis with other unrelated insurance company shareholders, has committed to continue funding the operating deficits of this joint venture. Additionally, the Company and the other unrelated shareholders, on a joint and several basis, have guaranteed an operating lease for an office building, which expires in 2016. The guarantee of the operating lease is a parallel guarantee to the commitment to fund operating deficits; consequently, the separate guarantee to the lessor is not expected to be triggered as long as the joint venture continues to be funded by its shareholders which provide liquidity to make its annual lease payments. In the event that the other parties to the joint venture are unable to meet their commitments in funding the operations of this joint venture, the Company would be required to assume the obligation for the entire office building operating lease. The Company does not believe it is likely that it will be required to do so. However, as of September 30, 2015 , the maximum potential future lease payments and other related costs that the Company could be required to pay under this guarantee, in excess of amounts already recorded, were approximately $28 million . If the Company were required to assume the entire lease obligation, the Company would have the right to pursue reimbursement from the other shareholders and the right to all sublease revenues. Guarantees As of September 30, 2015 and December 31, 2014 , the Company had recorded liabilities of $5 million related to guarantee and indemnification agreements. 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 representation and warranties with respect to the business entities or assets being 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, 2015 , the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $260 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 the 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, 2015 , 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. In the normal course of business, the Company also provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities provided by a previously owned subsidiary, which are estimated to mature through 2120. The potential amount of future payments the Company could be required to pay under these guarantees was approximately $2.0 billion as of September 30, 2015 . The Company does not believe a payable 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.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) by Component	9 Months Ended
	Sep. 30, 2015
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 following tables present 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, 2015 $ 31 $ 689 $ (585 ) $ 8 $ 143 Other comprehensive income (loss) before reclassifications 2 (67 ) — (53 ) (118 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $17, $2, $- and $19 — (31 ) (4 ) — (35 ) Other comprehensive income (loss) after 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 Net unrealized gains (losses) on discontinued operations Pension and postretirement benefits Cumulative foreign currency translation adjustment Total Balance as of July 1, 2014 $ 35 $ 1,182 $ 37 $ (476 ) $ 184 $ 962 Other comprehensive income (loss) before reclassifications 1 (59 ) (3 ) (2 ) (73 ) (136 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $(12), $(23), $2, $- and $(33) — 24 34 (5 ) — 53 Other comprehensive income (loss) after tax (expense) benefit of $(1), $64, $25, $(1), $- and $87 1 (83 ) (37 ) 3 (73 ) (189 ) Balance as of September 30, 2014 $ 36 $ 1,099 $ — $ (473 ) $ 111 $ 773 (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) after tax (expense) benefit of $-, $22, $9, $- and $31 — (29 ) (16 ) — (45 ) Other comprehensive income (loss) after 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 (In millions) Net unrealized gains (losses) on investments with OTTI losses Net unrealized gains (losses) on other investments Net unrealized gains (losses) on discontinued operations Pension and postretirement benefits Cumulative foreign currency translation adjustment Total Balance as of January 1, 2014 $ 26 $ 692 $ — $ (426 ) $ 150 $ 442 Transfer to net assets held for sale (5 ) (17 ) 22 — — — Other comprehensive income (loss) before reclassifications 15 462 12 (2 ) (39 ) 448 Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $(20), $(23), $(25), $- and $(68) — 38 34 45 — 117 Other comprehensive income (loss) after tax (expense) benefit of $(8), $(209), $15, $26, $- and $(176) 15 424 (22 ) (47 ) (39 ) 331 Balance as of September 30, 2014 $ 36 $ 1,099 $ — $ (473 ) $ 111 $ 773 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) Net unrealized gains (losses) on discontinued operations Income (loss) from discontinued operations Pension and postretirement benefits Other operating expenses

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2015
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, 2014 . 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 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 (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 continuing operations and selected balance sheet items by segment are presented in the following tables. 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) from continuing operations $ 165 $ 54 $ 9 $ (28 ) $ (22 ) $ — $ 178 Three months ended September 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 725 $ 721 $ 225 $ 139 $ — $ — $ 1,810 Net investment income 126 157 15 177 5 — 480 Other revenues 76 10 — (3 ) 3 (2 ) 84 Total operating revenues 927 888 240 313 8 (2 ) 2,374 Claims, Benefits and Expenses Net incurred claims and benefits 367 549 134 319 (18 ) — 1,351 Policyholders’ dividends 2 1 — — — — 3 Amortization of deferred acquisition costs 151 122 52 7 — — 332 Other insurance related expenses 65 125 37 33 — — 260 Other expenses 65 10 8 36 55 (2 ) 172 Total claims, benefits and expenses 650 807 231 395 37 (2 ) 2,118 Operating income (loss) before income tax 277 81 9 (82 ) (29 ) — 256 Income tax (expense) benefit on operating income (loss) (93 ) (29 ) (4 ) 40 12 — (74 ) Net operating income (loss) 184 52 5 (42 ) (17 ) — 182 Net realized investment gains (losses) 3 2 1 30 1 — 37 Income tax (expense) benefit on net realized investment gains (losses) (1 ) 3 (2 ) (9 ) (1 ) — (10 ) Net realized investment gains (losses), after tax 2 5 (1 ) 21 — — 27 Net income (loss) from continuing operations $ 186 $ 57 $ 4 $ (21 ) $ (17 ) $ — $ 209 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) from continuing operations $ 440 $ 257 $ 41 $ (65 ) $ (124 ) $ — $ 549 September 30, 2015 (In millions) Reinsurance receivables $ 619 $ 664 $ 172 $ 517 $ 2,567 $ — $ 4,539 Insurance receivables 851 996 252 10 2 — 2,111 Deferred acquisition costs 305 216 85 — — — 606 Goodwill 117 — 34 — — — 151 Insurance reserves Claim and claim adjustment expenses 6,199 9,283 1,365 3,286 2,734 — 22,867 Unearned premiums 1,817 1,307 455 127 — — 3,706 Future policy benefits — — — 9,520 — — 9,520 Nine months ended September 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 2,126 $ 2,188 $ 697 $ 417 $ — $ (1 ) $ 5,427 Net investment income 423 549 46 521 17 — 1,556 Other revenues 218 28 — 10 10 (4 ) 262 Total operating revenues 2,767 2,765 743 948 27 (5 ) 7,245 Claims, Benefits and Expenses Net incurred claims and benefits 1,213 1,727 382 929 (20 ) — 4,231 Policyholders’ dividends 4 6 — — — — 10 Amortization of deferred acquisition costs 442 371 161 22 — — 996 Other insurance related expenses 197 376 113 96 — (1 ) 781 Other expenses 191 25 20 34 75 (4 ) 341 Total claims, benefits and expenses 2,047 2,505 676 1,081 55 (5 ) 6,359 Operating income (loss) before income tax 720 260 67 (133 ) (28 ) — 886 Income tax (expense) benefit on operating income (loss) (240 ) (85 ) (26 ) 98 11 — (242 ) Net operating income (loss) 480 175 41 (35 ) (17 ) — 644 Net realized investment gains (losses) 9 7 1 42 10 — 69 Income tax (expense) benefit on net realized investment gains (losses) (3 ) (1 ) (1 ) (14 ) (4 ) — (23 ) Net realized investment gains (losses), after tax 6 6 — 28 6 — 46 Net income (loss) from continuing operations $ 486 $ 181 $ 41 $ (7 ) $ (11 ) $ — $ 690 December 31, 2014 (In millions) Reinsurance receivables $ 567 $ 690 $ 207 $ 525 $ 2,753 $ — $ 4,742 Insurance receivables 778 954 250 13 2 — 1,997 Deferred acquisition costs 304 213 83 — — — 600 Goodwill 117 — 35 — — — 152 Insurance reserves Claim and claim adjustment expenses 6,229 9,514 1,441 3,183 2,904 — 23,271 Unearned premiums 1,763 1,273 431 125 — — 3,592 Future policy benefits — — — 9,490 — — 9,490 Policyholders’ funds 9 18 — — — — 27 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) 2015 2014 2015 2014 Specialty Management & Professional Liability $ 605 $ 699 $ 1,976 $ 2,113 Surety 132 133 377 380 Warranty & Alternative Risks 109 98 314 283 Specialty revenues 846 930 2,667 2,776 Commercial Middle Market 386 404 1,207 1,219 Small Business 144 170 467 535 Other Commercial Insurance 237 316 871 1,018 Commercial revenues 767 890 2,545 2,772 International Canada 52 69 161 210 CNA Europe 78 83 232 254 Hardy 86 89 249 280 International revenues 216 241 642 744 Life & Group Non-Core revenues 320 343 958 990 Corporate & Other Non-Core revenues 6 9 24 37 Eliminations (2 ) (2 ) (4 ) (5 ) Total revenues $ 2,153 $ 2,411 $ 6,832 $ 7,314

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Note K . Discontinued Operations The results of discontinued operations reflected in the Condensed Consolidated Statements of Operations are presented in the following table. Periods ended September 30, 2014 (In millions) Three Months Nine Months Revenues Net investment income $ 14 $ 94 Net realized investment gains 1 3 Total revenues 15 97 Claims, Benefits and Expenses Insurance claims and policyholders' benefits 12 75 Other operating expenses — 2 Total claims, benefits and expenses 12 77 Income before income tax 3 20 Income tax expense (2 ) (6 ) Income from discontinued operations, net of income tax 1 14 Loss on sale, net of income tax benefit (expense) of ($1) and $40 3 (211 ) Income (loss) from discontinued operations $ 4 $ (197 )

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2015
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) 2015 2014 2015 2014 Fixed maturity securities $ 449 $ 453 $ 1,344 $ 1,356 Equity securities 3 2 9 7 Limited partnership investments (93 ) 29 69 199 Mortgage loans 8 7 25 22 Short term investments 2 1 4 2 Trading portfolio 1 2 6 8 Other 1 — 1 3 Gross investment income 371 494 1,458 1,597 Investment expense (17 ) (14 ) (46 ) (41 ) Net investment income $ 354 $ 480 $ 1,412 $ 1,556
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) 2015 2014 2015 2014 Net realized investment gains (losses): Fixed maturity securities: Gross realized gains $ 22 $ 51 $ 91 $ 124 Gross realized losses (51 ) (12 ) (120 ) (66 ) Net realized investment gains (losses) on fixed maturity securities (29 ) 39 (29 ) 58 Equity securities: Gross realized gains 1 1 2 6 Gross realized losses (19 ) (4 ) (21 ) (4 ) Net realized investment gains (losses) on equity securities (18 ) (3 ) (19 ) 2 Derivative financial instruments (1 ) — 9 1 Short term investments and other (1 ) 1 — 8 Net realized investment gains (losses) $ (49 ) $ 37 $ (39 ) $ 69
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) 2015 2014 2015 2014 Fixed maturity securities available-for-sale: Corporate and other bonds $ 36 $ 6 $ 52 $ 9 States, municipalities and political subdivisions — — 18 — Asset-backed: Residential mortgage-backed 1 2 7 4 Other asset-backed — — 1 1 Total asset-backed 1 2 8 5 Total fixed maturity securities available-for-sale 37 8 78 14 Equity securities available-for-sale -- Common stock 19 2 20 3 Short term investments — — 1 — Net OTTI losses recognized in earnings $ 56 $ 10 $ 99 $ 17
Summary of fixed maturity and equity securities	The following tables present a summary of fixed maturity and equity securities. September 30, 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 $ 17,155 $ 1,237 $ 207 $ 18,185 $ — States, municipalities and political subdivisions 11,978 1,336 17 13,297 (5 ) Asset-backed: Residential mortgage-backed 4,850 204 13 5,041 (46 ) Commercial mortgage-backed 2,183 77 9 2,251 — Other asset-backed 1,009 11 4 1,016 — Total asset-backed 8,042 292 26 8,308 (46 ) U.S. Treasury and obligations of government-sponsored enterprises 24 5 — 29 — Foreign government 333 12 1 344 — Redeemable preferred stock 33 2 — 35 — Total fixed maturity securities available-for-sale 37,565 2,884 251 40,198 $ (51 ) Total fixed maturity securities trading 3 3 Equity securities available-for-sale: Common stock 62 3 — 65 Preferred stock 145 4 2 147 Total equity securities available-for-sale 207 7 2 212 Total $ 37,775 $ 2,891 $ 253 $ 40,413 December 31, 2014 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 $ 17,210 $ 1,721 $ 61 $ 18,870 $ — States, municipalities and political subdivisions 11,285 1,463 8 12,740 — Asset-backed: Residential mortgage-backed 5,028 218 13 5,233 (53 ) Commercial mortgage-backed 2,056 93 5 2,144 (2 ) Other asset-backed 1,234 11 10 1,235 — Total asset-backed 8,318 322 28 8,612 (55 ) U.S. Treasury and obligations of government-sponsored enterprises 26 5 — 31 — Foreign government 438 16 — 454 — Redeemable preferred stock 39 3 — 42 — Total fixed maturity securities available-for-sale 37,316 3,530 97 40,749 $ (55 ) Total fixed maturity securities trading 19 19 Equity securities available-for-sale: Common stock 38 9 — 47 Preferred stock 172 5 2 175 Total equity securities available-for-sale 210 14 2 222 Total $ 37,545 $ 3,544 $ 99 $ 40,990
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, 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 $ 3,744 $ 177 $ 188 $ 30 $ 3,932 $ 207 States, municipalities and political subdivisions 655 11 131 6 786 17 Asset-backed: Residential mortgage-backed 308 3 211 10 519 13 Commercial mortgage-backed 479 6 81 3 560 9 Other asset-backed 354 4 9 — 363 4 Total asset-backed 1,141 13 301 13 1,442 26 U.S. Treasury and obligations of government-sponsored enterprises 1 — — — 1 — Foreign government 23 — 3 1 26 1 Redeemable preferred stock 3 — — — 3 — Total fixed maturity securities available-for-sale 5,567 201 623 50 6,190 251 Equity securities available-for-sale: Preferred stock 3 — 14 2 17 2 Total $ 5,570 $ 201 $ 637 $ 52 $ 6,207 $ 253 Less than 12 Months 12 Months or Longer Total December 31, 2014 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 $ 1,330 $ 46 $ 277 $ 15 $ 1,607 $ 61 States, municipalities and political subdivisions 335 5 127 3 462 8 Asset-backed: Residential mortgage-backed 293 5 189 8 482 13 Commercial mortgage-backed 264 2 99 3 363 5 Other asset-backed 607 10 7 — 614 10 Total asset-backed 1,164 17 295 11 1,459 28 U.S. Treasury and obligations of government-sponsored enterprises 3 — 4 — 7 — Foreign government 3 — 3 — 6 — Redeemable preferred stock 3 — — — 3 — Total fixed maturity securities available-for-sale 2,838 68 706 29 3,544 97 Equity securities available-for-sale: Preferred stock 17 2 1 — 18 2 Total $ 2,855 $ 70 $ 707 $ 29 $ 3,562 $ 99
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, 2015 and 2014 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) 2015 2014 2015 2014 Beginning balance of credit losses on fixed maturity securities $ 59 $ 66 $ 62 $ 74 Reductions for securities sold during the period (2 ) (2 ) (5 ) (7 ) Reductions for securities the Company intends to sell or more likely than not will be required to sell — — — (3 ) Ending balance of credit losses on fixed maturity securities $ 57 $ 64 $ 57 $ 64
Contractual maturity	The following table presents available-for-sale fixed maturity securities by contractual maturity. September 30, 2015 December 31, 2014 (In millions) Cost or Amortized Cost Estimated Fair Value Cost or Amortized Cost Estimated Fair Value Due in one year or less $ 1,406 $ 1,425 $ 2,479 $ 2,511 Due after one year through five years 7,772 8,186 9,054 9,605 Due after five years through ten years 14,149 14,577 12,055 12,584 Due after ten years 14,238 16,010 13,728 16,049 Total $ 37,565 $ 40,198 $ 37,316 $ 40,749
Summary of aggregate contractual or notional amounts and gross estimated fair values related to derivative financial instruments	The following tables present the aggregate contractual or notional amounts and estimated fair values related to derivative financial instruments. September 30, 2015 Contractual/ Notional Amount Estimated Fair Value (In millions) Asset Liability Without hedge designation Equity warrants $ 5 $ — $ — Embedded derivative on funds withheld liability 182 — (5 ) Total $ — $ (5 ) December 31, 2014 Contractual/ Notional Amount Estimated Fair Value (In millions) Asset Liability Without hedge designation Currency forwards $ 9 $ — $ — Equity warrants 5 — — Embedded derivative on funds withheld liability 184 — 3 Total $ — $ 3

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2015
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, 2015 Total Assets/Liabilities at Fair Value (In millions) Level 1 Level 2 Level 3 Assets Fixed maturity securities: Corporate and other bonds $ 28 $ 18,007 $ 153 $ 18,188 States, municipalities and political subdivisions — 13,236 61 13,297 Asset-backed: Residential mortgage-backed — 4,837 204 5,041 Commercial mortgage-backed — 2,180 71 2,251 Other asset-backed — 545 471 1,016 Total asset-backed — 7,562 746 8,308 U.S. Treasury and obligations of government-sponsored enterprises 28 1 — 29 Foreign government 28 316 — 344 Redeemable preferred stock 24 11 — 35 Total fixed maturity securities 108 39,133 960 40,201 Equity securities 154 43 15 212 Other invested assets — 45 — 45 Short term investments 624 773 — 1,397 Life settlement contracts, included in Other assets — — 74 74 Total assets $ 886 $ 39,994 $ 1,049 $ 41,929 Liabilities Other liabilities $ — $ (5 ) $ — $ (5 ) Total liabilities $ — $ (5 ) $ — $ (5 ) December 31, 2014 Total Assets/Liabilities at Fair Value (In millions) Level 1 Level 2 Level 3 Assets Fixed maturity securities: Corporate and other bonds $ 32 $ 18,695 $ 162 $ 18,889 States, municipalities and political subdivisions — 12,646 94 12,740 Asset-backed: Residential mortgage-backed — 5,044 189 5,233 Commercial mortgage-backed — 2,061 83 2,144 Other asset-backed — 580 655 1,235 Total asset-backed — 7,685 927 8,612 U.S. Treasury and obligations of government-sponsored enterprises 28 3 — 31 Foreign government 41 413 — 454 Redeemable preferred stock 30 12 — 42 Total fixed maturity securities 131 39,454 1,183 40,768 Equity securities 145 61 16 222 Other invested assets — 41 — 41 Short term investments 681 963 — 1,644 Life settlement contracts, included in Other assets — — 82 82 Total assets $ 957 $ 40,519 $ 1,281 $ 42,757 Liabilities Other liabilities $ — $ 3 $ — $ 3 Total liabilities $ — $ 3 $ — $ 3
Table of reconciliation for assets and liablities measured at fair value on a recurring basis using significant unobservable inputs	The following tables 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, 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 July 1, 2014 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, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 194 $ — $ (1 ) $ 4 $ — $ (3 ) $ — $ (21 ) $ 173 $ — States, municipalities and political subdivisions 79 — 1 — — — — — 80 — Asset-backed: Residential mortgage-backed 185 1 — — — (17 ) 11 (20 ) 160 — Commercial mortgage-backed 59 2 (2 ) 28 — (21 ) 31 — 97 — Other asset-backed 626 1 (4 ) 80 — (25 ) — (36 ) 642 — Total asset-backed 870 4 (6 ) 108 — (63 ) 42 (56 ) 899 — Total fixed maturity securities 1,143 4 (6 ) 112 — (66 ) 42 (77 ) 1,152 — Equity securities 2 — (1 ) 16 — — — — 17 — Life settlement contracts 86 1 — — — (1 ) — — 86 1 Total $ 1,231 $ 5 $ (7 ) $ 128 $ — $ (67 ) $ 42 $ (77 ) $ 1,255 $ 1 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 $ — Level 3 (In millions) Balance as of January 1, 2014 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, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of September 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 204 $ 2 $ — $ 30 $ (10 ) $ (13 ) $ 8 $ (48 ) $ 173 $ — States, municipalities and political subdivisions 71 1 3 1 (10 ) — 14 — 80 — Asset-backed: Residential mortgage-backed 331 (22 ) 62 47 (174 ) (57 ) 32 (59 ) 160 — Commercial mortgage-backed 151 4 (2 ) 28 (60 ) (23 ) 43 (44 ) 97 — Other asset-backed 446 2 — 457 (111 ) (115 ) — (37 ) 642 (1 ) Total asset-backed 928 (16 ) 60 532 (345 ) (195 ) 75 (140 ) 899 (1 ) Total fixed maturity securities 1,203 (13 ) 63 563 (365 ) (208 ) 97 (188 ) 1,152 (1 ) Equity securities 11 3 (5 ) 16 (8 ) — — — 17 — Life settlement contracts 88 23 — — — (25 ) — — 86 3 Separate account business 1 — — — — — — (1 ) — — Total $ 1,303 $ 13 $ 58 $ 579 $ (373 ) $ (233 ) $ 97 $ (189 ) $ 1,255 $ 2
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 measurements of Level 3 assets. Valuations for assets and liabilities not presented in the table 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, 2015 Estimated Fair Value (In millions) Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Fixed maturity securities $ 121 Discounted cash flow Credit spread 2% - 31% (3%) Life settlement contracts 74 Discounted cash flow Discount rate risk premium 9% Mortality assumption 55% - 1676% (164%) December 31, 2014 Estimated Fair Value Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Fixed maturity securities $ 101 Discounted cash flow Credit spread 2% - 13% (3%) Equity securities 16 Market approach Private offering price $12 - $4,391 per share ($600) Life settlement contracts 82 Discounted cash flow Discount rate risk premium 9% Mortality assumption 55% - 1676% (163%)
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, 2015 Carrying Amount Estimated Fair Value (In millions) Level 1 Level 2 Level 3 Total Assets Mortgage loans $ 640 $ — $ — $ 660 $ 660 Liabilities Short term debt $ 350 $ — $ 366 $ — $ 366 Long term debt 2,211 — 2,478 — 2,478 December 31, 2014 Carrying Estimated Fair Value (In millions) Level 1 Level 2 Level 3 Total Assets Notes receivable for the issuance of common stock $ 1 $ — $ — $ 1 $ 1 Mortgage loans 588 — — 608 608 Liabilities Long term debt $ 2,559 $ — $ 2,883 $ — $ 2,883

Claim and Claim Adjustment Ex22

Claim and Claim Adjustment Expense Reserves (Tables)	9 Months Ended
	Sep. 30, 2015
Liability for Claims and Claims Adjustment Expense [Abstract]
Net prior year development	The following tables and discussion present net prior year development recorded for Specialty, Commercial, International and Corporate & Other Non-Core segments. 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 ) Three months ended September 30, 2014 (In millions) Specialty Commercial International Corporate & Other Non-Core Total Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (79 ) $ 71 $ (17 ) $ (1 ) $ (26 ) Pretax (favorable) unfavorable premium development (4 ) — 7 — 3 Total pretax (favorable) unfavorable net prior year development $ (83 ) $ 71 $ (10 ) $ (1 ) $ (23 ) 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 ) Nine months ended September 30, 2014 (In millions) Specialty Commercial International Corporate & Other Non-Core Total Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (123 ) $ 179 $ (32 ) $ (1 ) $ 23 Pretax (favorable) unfavorable premium development (12 ) (24 ) 6 — (30 ) Total pretax (favorable) unfavorable net prior year development $ (135 ) $ 155 $ (26 ) $ (1 ) $ (7 )
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) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ (19 ) $ 16 $ (11 ) $ 17 Other Professional Liability and Management Liability (37 ) (9 ) (41 ) (59 ) Surety (70 ) (79 ) (69 ) (78 ) Warranty — — 1 — Other (4 ) (7 ) (21 ) (3 ) Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (130 ) $ (79 ) $ (141 ) $ (123 )
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. A significant amount of the unfavorable development for the nine months ended September 30, 2014 relates to business classes which the Company has exited, but also includes Small Business where the Company has taken underwriting actions in an effort to improve profitability. Periods ended September 30 Three Months Nine Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Commercial Auto $ — $ 13 $ 7 $ 52 General Liability 3 44 8 76 Workers' Compensation (1 ) 25 22 75 Property and Other (13 ) (11 ) (37 ) (24 ) Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (11 ) $ 71 $ — $ 179
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) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ (8 ) $ (3 ) $ (8 ) $ (2 ) Other Professional Liability (11 ) 1 (16 ) (14 ) Liability (5 ) (3 ) (12 ) (9 ) Property & Marine (5 ) (11 ) (19 ) (10 ) Other (5 ) (1 ) 9 (7 ) Commutations — — — 10 Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (34 ) $ (17 ) $ (46 ) $ (32 )
Impact of loss portfolio transfer on consolidated statements of operations	The following table displays the impact of the Loss Portfolio Transfer on the Condensed Consolidated Statements of Operations. Periods ended September 30 Three Months Nine Months (In millions) 2015 2014 2015 2014 Net A&EP adverse development before consideration of LPT $ — $ — $ 150 $ — Provision for uncollectible third-party reinsurance on A&EP — — — — Additional amounts ceded under LPT — — 150 — Retroactive reinsurance benefit recognized (4 ) (4 ) (75 ) (9 ) Pretax impact of deferred retroactive reinsurance benefit $ (4 ) $ (4 ) $ 75 $ (9 )

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2015
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) 2015 2014 2015 2014 Pension cost (benefit) Service cost $ — $ 3 $ 4 $ 7 Interest cost on projected benefit obligation 29 33 85 99 Expected return on plan assets (44 ) (48 ) (131 ) (144 ) Amortization of net actuarial loss 7 6 26 19 Net periodic pension cost (benefit) $ (8 ) $ (6 ) $ (16 ) $ (19 ) Postretirement cost (benefit) Interest cost on projected benefit obligation $ — $ — $ — $ 1 Amortization of prior service credit (1 ) — (2 ) (9 ) Amortization of net actuarial loss — — 1 — Curtailment gain — — — (86 ) Net periodic postretirement cost (benefit) $ (1 ) $ — $ (1 ) $ (94 )

Accumulated Other Comprehensi24

Accumulated Other Comprehensive Income (Loss) by Component (Tables)	9 Months Ended
	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss) by Component	The following tables present 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, 2015 $ 31 $ 689 $ (585 ) $ 8 $ 143 Other comprehensive income (loss) before reclassifications 2 (67 ) — (53 ) (118 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $17, $2, $- and $19 — (31 ) (4 ) — (35 ) Other comprehensive income (loss) after 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 Net unrealized gains (losses) on discontinued operations Pension and postretirement benefits Cumulative foreign currency translation adjustment Total Balance as of July 1, 2014 $ 35 $ 1,182 $ 37 $ (476 ) $ 184 $ 962 Other comprehensive income (loss) before reclassifications 1 (59 ) (3 ) (2 ) (73 ) (136 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $(12), $(23), $2, $- and $(33) — 24 34 (5 ) — 53 Other comprehensive income (loss) after tax (expense) benefit of $(1), $64, $25, $(1), $- and $87 1 (83 ) (37 ) 3 (73 ) (189 ) Balance as of September 30, 2014 $ 36 $ 1,099 $ — $ (473 ) $ 111 $ 773 (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) after tax (expense) benefit of $-, $22, $9, $- and $31 — (29 ) (16 ) — (45 ) Other comprehensive income (loss) after 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 (In millions) Net unrealized gains (losses) on investments with OTTI losses Net unrealized gains (losses) on other investments Net unrealized gains (losses) on discontinued operations Pension and postretirement benefits Cumulative foreign currency translation adjustment Total Balance as of January 1, 2014 $ 26 $ 692 $ — $ (426 ) $ 150 $ 442 Transfer to net assets held for sale (5 ) (17 ) 22 — — — Other comprehensive income (loss) before reclassifications 15 462 12 (2 ) (39 ) 448 Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $(20), $(23), $(25), $- and $(68) — 38 34 45 — 117 Other comprehensive income (loss) after tax (expense) benefit of $(8), $(209), $15, $26, $- and $(176) 15 424 (22 ) (47 ) (39 ) 331 Balance as of September 30, 2014 $ 36 $ 1,099 $ — $ (473 ) $ 111 $ 773

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The Company's results of continuing operations and selected balance sheet items by segment are presented in the following tables. 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) from continuing operations $ 165 $ 54 $ 9 $ (28 ) $ (22 ) $ — $ 178 Three months ended September 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 725 $ 721 $ 225 $ 139 $ — $ — $ 1,810 Net investment income 126 157 15 177 5 — 480 Other revenues 76 10 — (3 ) 3 (2 ) 84 Total operating revenues 927 888 240 313 8 (2 ) 2,374 Claims, Benefits and Expenses Net incurred claims and benefits 367 549 134 319 (18 ) — 1,351 Policyholders’ dividends 2 1 — — — — 3 Amortization of deferred acquisition costs 151 122 52 7 — — 332 Other insurance related expenses 65 125 37 33 — — 260 Other expenses 65 10 8 36 55 (2 ) 172 Total claims, benefits and expenses 650 807 231 395 37 (2 ) 2,118 Operating income (loss) before income tax 277 81 9 (82 ) (29 ) — 256 Income tax (expense) benefit on operating income (loss) (93 ) (29 ) (4 ) 40 12 — (74 ) Net operating income (loss) 184 52 5 (42 ) (17 ) — 182 Net realized investment gains (losses) 3 2 1 30 1 — 37 Income tax (expense) benefit on net realized investment gains (losses) (1 ) 3 (2 ) (9 ) (1 ) — (10 ) Net realized investment gains (losses), after tax 2 5 (1 ) 21 — — 27 Net income (loss) from continuing operations $ 186 $ 57 $ 4 $ (21 ) $ (17 ) $ — $ 209 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) from continuing operations $ 440 $ 257 $ 41 $ (65 ) $ (124 ) $ — $ 549 September 30, 2015 (In millions) Reinsurance receivables $ 619 $ 664 $ 172 $ 517 $ 2,567 $ — $ 4,539 Insurance receivables 851 996 252 10 2 — 2,111 Deferred acquisition costs 305 216 85 — — — 606 Goodwill 117 — 34 — — — 151 Insurance reserves Claim and claim adjustment expenses 6,199 9,283 1,365 3,286 2,734 — 22,867 Unearned premiums 1,817 1,307 455 127 — — 3,706 Future policy benefits — — — 9,520 — — 9,520 Nine months ended September 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 2,126 $ 2,188 $ 697 $ 417 $ — $ (1 ) $ 5,427 Net investment income 423 549 46 521 17 — 1,556 Other revenues 218 28 — 10 10 (4 ) 262 Total operating revenues 2,767 2,765 743 948 27 (5 ) 7,245 Claims, Benefits and Expenses Net incurred claims and benefits 1,213 1,727 382 929 (20 ) — 4,231 Policyholders’ dividends 4 6 — — — — 10 Amortization of deferred acquisition costs 442 371 161 22 — — 996 Other insurance related expenses 197 376 113 96 — (1 ) 781 Other expenses 191 25 20 34 75 (4 ) 341 Total claims, benefits and expenses 2,047 2,505 676 1,081 55 (5 ) 6,359 Operating income (loss) before income tax 720 260 67 (133 ) (28 ) — 886 Income tax (expense) benefit on operating income (loss) (240 ) (85 ) (26 ) 98 11 — (242 ) Net operating income (loss) 480 175 41 (35 ) (17 ) — 644 Net realized investment gains (losses) 9 7 1 42 10 — 69 Income tax (expense) benefit on net realized investment gains (losses) (3 ) (1 ) (1 ) (14 ) (4 ) — (23 ) Net realized investment gains (losses), after tax 6 6 — 28 6 — 46 Net income (loss) from continuing operations $ 486 $ 181 $ 41 $ (7 ) $ (11 ) $ — $ 690 December 31, 2014 (In millions) Reinsurance receivables $ 567 $ 690 $ 207 $ 525 $ 2,753 $ — $ 4,742 Insurance receivables 778 954 250 13 2 — 1,997 Deferred acquisition costs 304 213 83 — — — 600 Goodwill 117 — 35 — — — 152 Insurance reserves Claim and claim adjustment expenses 6,229 9,514 1,441 3,183 2,904 — 23,271 Unearned premiums 1,763 1,273 431 125 — — 3,592 Future policy benefits — — — 9,490 — — 9,490 Policyholders’ funds 9 18 — — — — 27
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) 2015 2014 2015 2014 Specialty Management & Professional Liability $ 605 $ 699 $ 1,976 $ 2,113 Surety 132 133 377 380 Warranty & Alternative Risks 109 98 314 283 Specialty revenues 846 930 2,667 2,776 Commercial Middle Market 386 404 1,207 1,219 Small Business 144 170 467 535 Other Commercial Insurance 237 316 871 1,018 Commercial revenues 767 890 2,545 2,772 International Canada 52 69 161 210 CNA Europe 78 83 232 254 Hardy 86 89 249 280 International revenues 216 241 642 744 Life & Group Non-Core revenues 320 343 958 990 Corporate & Other Non-Core revenues 6 9 24 37 Eliminations (2 ) (2 ) (4 ) (5 ) Total revenues $ 2,153 $ 2,411 $ 6,832 $ 7,314

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Results of discontinued operations	The results of discontinued operations reflected in the Condensed Consolidated Statements of Operations are presented in the following table. Periods ended September 30, 2014 (In millions) Three Months Nine Months Revenues Net investment income $ 14 $ 94 Net realized investment gains 1 3 Total revenues 15 97 Claims, Benefits and Expenses Insurance claims and policyholders' benefits 12 75 Other operating expenses — 2 Total claims, benefits and expenses 12 77 Income before income tax 3 20 Income tax expense (2 ) (6 ) Income from discontinued operations, net of income tax 1 14 Loss on sale, net of income tax benefit (expense) of ($1) and $40 3 (211 ) Income (loss) from discontinued operations $ 4 $ (197 )

General General (Details)

General General (Details) $ in Millions	3 Months Ended
	Sep. 30, 2014USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Loss on reinsurance transaction	$ 34

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	106	180	107	167
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	514	668	545	654

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Reduction of net unrealized gains on investments included in AOCI due to shadow adjustments	$ 1,046	$ 1,288
Future capital call commitments for limited partnership investments	414
Mortgage loan commitments	29
Commitments to purchase or fund privately placed debt securities	81
Commitments to sell various privately placed debt securities	$ 43

Investments (Net investment inc

Investments (Net investment income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Investment Income [Line Items]
Gross investment income	$ 371	$ 494	$ 1,458	$ 1,597
Investment expense	(17)	(14)	(46)	(41)
Net investment income	354	480	1,412	1,556
Fixed maturity securities [Member]
Net Investment Income [Line Items]
Gross investment income	449	453	1,344	1,356
Equity securities [Member]
Net Investment Income [Line Items]
Gross investment income	3	2	9	7
Limited partnership investments [Member]
Net Investment Income [Line Items]
Gross investment income	(93)	29	69	199
Mortgage loans [Member]
Net Investment Income [Line Items]
Gross investment income	8	7	25	22
Short term investments [Member]
Net Investment Income [Line Items]
Gross investment income	2	1	4	2
Trading portfolio [Member]
Net Investment Income [Line Items]
Gross investment income	1	2	6	8
Other [Member]
Net Investment Income [Line Items]
Gross investment income	$ 1	$ 0	$ 1	$ 3

Investments (Net realized inves

Investments (Net realized investment gains (losses)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net realized investment gains (losses)	$ (49)	$ 37	$ (39)	$ 69
Fixed maturity securities [Member]
Gross realized gains	22	51	91	124
Gross realized losses	(51)	(12)	(120)	(66)
Net realized investment gains (losses)	(29)	39	(29)	58
Equity securities [Member]
Gross realized gains	1	1	2	6
Gross realized losses	(19)	(4)	(21)	(4)
Net realized investment gains (losses)	(18)	(3)	(19)	2
Derivative [Member]
Net realized investment gains (losses)	(1)	0	9	1
Short term investments and other [Member]
Net realized investment gains (losses)	$ (1)	$ 1	$ 0	$ 8

Investments (Components of othe

Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other-than-temporary impairment losses recognized in earnings	$ 56	$ 10	$ 99	$ 17
Corporate and other bonds [Member]
Other-than-temporary impairment losses recognized in earnings	36	6	52	9
States, municipalities and political subdivisions [Member]
Other-than-temporary impairment losses recognized in earnings	0	0	18	0
Residential mortgage-backed [Member]
Other-than-temporary impairment losses recognized in earnings	1	2	7	4
Other asset-backed [Member]
Other-than-temporary impairment losses recognized in earnings	0	0	1	1
Total asset-backed [Member]
Other-than-temporary impairment losses recognized in earnings	1	2	8	5
Total fixed maturity securities available-for-sale [Member]
Other-than-temporary impairment losses recognized in earnings	37	8	78	14
Common Stock [Member]
Other-than-temporary impairment losses recognized in earnings	19	2	20	3
Short term investments [Member]
Other-than-temporary impairment losses recognized in earnings	$ 0	$ 0	$ 1	$ 0

Investments (Summary of fixed m

Investments (Summary of fixed maturity and equity securities) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Cost or Amortized Cost	$ 37,775	$ 37,545
Gross Unrealized Gain	2,891	3,544
Gross Unrealized Loss	253	99
Estimated fair value	40,413	40,990
Corporate and other bonds [Member]
Cost or Amortized Cost	17,155	17,210
Gross Unrealized Gain	1,237	1,721
Gross Unrealized Loss	207	61
Estimated fair value	18,185	18,870
Unrealized OTTI Losses (Gains)	0	0
States, municipalities and political subdivisions [Member]
Cost or Amortized Cost	11,978	11,285
Gross Unrealized Gain	1,336	1,463
Gross Unrealized Loss	17	8
Estimated fair value	13,297	12,740
Unrealized OTTI Losses (Gains)	(5)	0
Residential mortgage-backed [Member]
Cost or Amortized Cost	4,850	5,028
Gross Unrealized Gain	204	218
Gross Unrealized Loss	13	13
Estimated fair value	5,041	5,233
Unrealized OTTI Losses (Gains)	(46)	(53)
Commercial mortgage-backed [Member]
Cost or Amortized Cost	2,183	2,056
Gross Unrealized Gain	77	93
Gross Unrealized Loss	9	5
Estimated fair value	2,251	2,144
Unrealized OTTI Losses (Gains)	0	(2)
Other asset-backed [Member]
Cost or Amortized Cost	1,009	1,234
Gross Unrealized Gain	11	11
Gross Unrealized Loss	4	10
Estimated fair value	1,016	1,235
Unrealized OTTI Losses (Gains)	0	0
Total asset-backed [Member]
Cost or Amortized Cost	8,042	8,318
Gross Unrealized Gain	292	322
Gross Unrealized Loss	26	28
Estimated fair value	8,308	8,612
Unrealized OTTI Losses (Gains)	(46)	(55)
U.S. Treasury and obligations of government-sponsored enterprises [Member]
Cost or Amortized Cost	24	26
Gross Unrealized Gain	5	5
Gross Unrealized Loss	0	0
Estimated fair value	29	31
Unrealized OTTI Losses (Gains)	0	0
Foreign Government Debt Securities [Member]
Cost or Amortized Cost	333	438
Gross Unrealized Gain	12	16
Gross Unrealized Loss	1	0
Estimated fair value	344	454
Unrealized OTTI Losses (Gains)	0	0
Redeemable preferred stock [Member]
Cost or Amortized Cost	33	39
Gross Unrealized Gain	2	3
Gross Unrealized Loss	0	0
Estimated fair value	35	42
Unrealized OTTI Losses (Gains)	0	0
Total fixed maturity securities available-for-sale [Member]
Cost or Amortized Cost	37,565	37,316
Gross Unrealized Gain	2,884	3,530
Gross Unrealized Loss	251	97
Estimated fair value	40,198	40,749
Unrealized OTTI Losses (Gains)	(51)	(55)
Total fixed maturity securities trading [Member]
Cost or Amortized Cost, Trading Securities	3	19
Estimated Fair Value, Trading Securities	3	19
Common Stock [Member]
Cost or Amortized Cost	62	38
Gross Unrealized Gain	3	9
Gross Unrealized Loss	0	0
Estimated fair value	65	47
Preferred stock [Member]
Cost or Amortized Cost	145	172
Gross Unrealized Gain	4	5
Gross Unrealized Loss	2	2
Estimated fair value	147	175
Total equity securities available-for-sale [Member]
Cost or Amortized Cost	207	210
Gross Unrealized Gain	7	14
Gross Unrealized Loss	2	2
Estimated fair value	$ 212	$ 222

Investments (Activity related t

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance of credit losses on fixed maturity securities	$ 59	$ 66	$ 62	$ 74
Reductions for securities sold during the period	(2)	(2)	(5)	(7)
Reductions for securities the Company intends to sell or more likely than not will be required to sell	0	0	0	(3)
Ending balance of credit losses on fixed maturity securities	$ 57	$ 64	$ 57	$ 64

Investments (Securities in a gr

Investments (Securities in a gross unrealized loss position) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 5,570	$ 2,855
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	201	70
Estimated Fair Value, 12 Months or Longer	637	707
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	52	29
Estimated Fair Value, Total	6,207	3,562
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	253	99
Corporate and other bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	3,744	1,330
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	177	46
Estimated Fair Value, 12 Months or Longer	188	277
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	30	15
Estimated Fair Value, Total	3,932	1,607
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	207	61
States, municipalities and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	655	335
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	11	5
Estimated Fair Value, 12 Months or Longer	131	127
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	6	3
Estimated Fair Value, Total	786	462
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	17	8
Residential mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	308	293
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	3	5
Estimated Fair Value, 12 Months or Longer	211	189
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	10	8
Estimated Fair Value, Total	519	482
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	13	13
Commercial mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	479	264
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	6	2
Estimated Fair Value, 12 Months or Longer	81	99
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3	3
Estimated Fair Value, Total	560	363
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	9	5
Other asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	354	607
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4	10
Estimated Fair Value, 12 Months or Longer	9	7
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	363	614
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	4	10
Total asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	1,141	1,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	13	17
Estimated Fair Value, 12 Months or Longer	301	295
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	13	11
Estimated Fair Value, Total	1,442	1,459
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	26	28
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	1	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Estimated Fair Value, 12 Months or Longer	0	4
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	1	7
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	23	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Estimated Fair Value, 12 Months or Longer	3	3
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	0
Estimated Fair Value, Total	26	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	0
Redeemable preferred stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	3	3
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	3	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0	0
Total fixed maturity securities available-for-sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	5,567	2,838
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	201	68
Estimated Fair Value, 12 Months or Longer	623	706
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	50	29
Estimated Fair Value, Total	6,190	3,544
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	251	97
Preferred stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	3	17
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	2
Estimated Fair Value, 12 Months or Longer	14	1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	0
Estimated Fair Value, Total	17	18
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 2	$ 2

Investments (Contractual maturi

Investments (Contractual maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Due in one year or less, cost or amortized cost	$ 1,406	$ 2,479
Due after one year through five years, cost or amortized cost	7,772	9,054
Due after five years through ten years, cost or amortized cost	14,149	12,055
Due after ten years, cost or amortized cost	14,238	13,728
Total Amortized Cost Basis	37,565	37,316
Due in one year or less, estimated fair value	1,425	2,511
Due after one year through five years, estimated fair value	8,186	9,605
Due after five years through ten years, estimated fair value	14,577	12,584
Due after ten years, estimated fair value	16,010	16,049
Total Estimated Fair Value	$ 40,198	$ 40,749

Investments Derivative Financia

Investments Derivative Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Estimated fair value asset	$ 0	$ 0
Estimated fair value liability	(5)	3
Not Designated as Hedging Instrument [Member] | Currency forwards [Member]
Derivative [Line Items]
Derivative, Notional Amount		9
Estimated fair value asset		0
Estimated fair value liability		0
Not Designated as Hedging Instrument [Member] | Equity warrants [Member]
Derivative [Line Items]
Derivative, Notional Amount	5	5
Estimated fair value asset	0	0
Estimated fair value liability	0	0
Not Designated as Hedging Instrument [Member] | Embedded Derivative Financial Instruments [Member]
Derivative [Line Items]
Derivative, Notional Amount	182	184
Estimated fair value asset	0	0
Estimated fair value liability	$ (5)	$ 3

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 2 to Level 1, Transfers	$ 10	$ 0	$ 10	$ 24
Fair Value, Assets, Level 1 to Level 2, Transfers	$ 0	$ 0	$ 0	$ 1

Fair Value (Assets and liabilit

Fair Value (Assets and liabilities measured at fair value on a recurring basis) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets, measured on a recurring basis	$ 41,929	$ 42,757
Fair value of liabilities, measured on a recurring basis	(5)	3
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	18,188	18,889
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	13,297	12,740
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	5,041	5,233
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	2,251	2,144
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	1,016	1,235
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	8,308	8,612
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	29	31
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	344	454
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	35	42
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	40,201	40,768
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	212	222
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	45	41
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	1,397	1,644
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	74	82
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	(5)	3
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	886	957
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	28	32
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	28	28
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	28	41
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	24	30
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	108	131
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	154	145
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	624	681
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	39,994	40,519
Fair value of liabilities, measured on a recurring basis	(5)	3
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	18,007	18,695
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	13,236	12,646
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	4,837	5,044
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	2,180	2,061
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	545	580
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	7,562	7,685
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	1	3
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	316	413
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	11	12
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	39,133	39,454
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	43	61
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	45	41
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	773	963
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	(5)	3
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	1,049	1,281
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	153	162
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	61	94
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	204	189
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	71	83
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	471	655
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	746	927
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	960	1,183
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	15	16
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	74	82
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

Fair Value (Table of reconcilia

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	$ 1,101	$ 1,231	$ 1,281	$ 1,303
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	12	5	36	13
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(13)	(7)	(6)	58
Purchases	82	128	263	579
Sales	(21)	0	(267)	(373)
Settlements	(71)	(67)	(169)	(233)
Transfers into Level 3	0	42	54	97
Transfers out of Level 3	(41)	(77)	(143)	(189)
Balance, Ending, Assets	1,049	1,255	1,049	1,255
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	2	1	0	2
Corporate and other bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	141	194	162	204
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	0	(1)	2
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	(1)	(1)	0
Purchases	27	4	39	30
Sales	(1)	0	(13)	(10)
Settlements	(11)	(3)	(32)	(13)
Transfers into Level 3	0	0	37	8
Transfers out of Level 3	(3)	(21)	(38)	(48)
Balance, Ending, Assets	153	173	153	173
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	85	79	94	71
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	0	1	1
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	1	0	3
Purchases	0	0	0	1
Sales	0	0	0	(10)
Settlements	0	0	(10)	0
Transfers into Level 3	0	0	0	14
Transfers out of Level 3	(24)	0	(24)	0
Balance, Ending, Assets	61	80	61	80
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	207	185	189	331
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	2	1	4	(22)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(2)	0	(4)	62
Purchases	4	0	76	47
Sales	0	0	0	(174)
Settlements	(7)	(17)	(28)	(57)
Transfers into Level 3	0	11	0	32
Transfers out of Level 3	0	(20)	(33)	(59)
Balance, Ending, Assets	204	160	204	160
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	87	59	83	151
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	5	2	7	4
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(4)	(2)	(4)	(2)
Purchases	8	28	23	28
Sales	0	0	0	(60)
Settlements	(15)	(21)	(17)	(23)
Transfers into Level 3	0	31	17	43
Transfers out of Level 3	(10)	0	(38)	(44)
Balance, Ending, Assets	71	97	71	97
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	490	626	655	446
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	1	3	2
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(6)	(4)	4	0
Purchases	43	80	125	457
Sales	(20)	0	(254)	(111)
Settlements	(32)	(25)	(52)	(115)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(4)	(36)	(10)	(37)
Balance, Ending, Assets	471	642	471	642
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	(1)	(1)
Total asset-backed [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	784	870	927	928
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	7	4	14	(16)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(12)	(6)	(4)	60
Purchases	55	108	224	532
Sales	(20)	0	(254)	(345)
Settlements	(54)	(63)	(97)	(195)
Transfers into Level 3	0	42	17	75
Transfers out of Level 3	(14)	(56)	(81)	(140)
Balance, Ending, Assets	746	899	746	899
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	(1)	(1)
Fixed maturity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	1,010	1,143	1,183	1,203
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	7	4	14	(13)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(12)	(6)	(5)	63
Purchases	82	112	263	563
Sales	(21)	0	(267)	(365)
Settlements	(65)	(66)	(139)	(208)
Transfers into Level 3	0	42	54	97
Transfers out of Level 3	(41)	(77)	(143)	(188)
Balance, Ending, Assets	960	1,152	960	1,152
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	(1)	(1)
Equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	16	2	16	11
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)	(1)	(1)	(1)	(5)
Purchases	0	16	0	16
Sales	0	0	0	(8)
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	15	17	15	17
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	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	75	86	82	88
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	5	1	22	23
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	(6)	(1)	(30)	(25)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, Ending, Assets	74	86	74	86
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 2	1	$ 1	3
Separate account business [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets				1
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)				0
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)				0
Purchases				0
Sales				0
Settlements				0
Transfers into Level 3				0
Transfers out of Level 3				(1)
Balance, Ending, Assets		$ 0		0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				$ 0

Fair Value (Quantitative inform

Fair Value (Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets) (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Fixed maturity securities [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 121	$ 101
Fixed maturity securities [Member] | Income Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit Spread	2.00%	2.00%
Fixed maturity securities [Member] | Income Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit Spread	31.00%	13.00%
Fixed maturity securities [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit Spread	3.00%	3.00%
Equity securities [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure		$ 16
Equity securities [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Private offering price		$ 12
Equity securities [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Private offering price		4,391
Equity securities [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Private offering price		$ 600
Life settlement contracts, included in Other assets [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 74	$ 82
Life settlement contracts, included in Other assets [Member] | Income Approach Valuation Technique [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] | Income Approach Valuation Technique [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] | Income Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortality assumption	164.00%	163.00%
Life settlement contracts, included in Other assets [Member] | Income Approach Valuation Technique [Member] | Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate risk premium	9.00%	9.00%

Fair Value (Carrying amount and

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, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Financial Assets [Abstract]
Notes receivable for the issuance of common stock	$ 0	$ 1	$ 1	$ 23
Mortgage loans	640	588
Financial Liabilities [Abstract]
Long term debt	2,211	2,559
Short term Debt	350	0
Carrying Amount [Member]
Financial Assets [Abstract]
Notes receivable for the issuance of common stock		1
Mortgage loans	640	588
Financial Liabilities [Abstract]
Long term debt	2,211	2,559
Short term Debt	350
Estimated Fair Value [Member]
Financial Assets [Abstract]
Notes receivable for the issuance of common stock		1
Mortgage loans	660	608
Financial Liabilities [Abstract]
Long term debt	2,478	2,883
Short term Debt	366
Level 1 [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Notes receivable for the issuance of common stock		0
Mortgage loans	0	0
Financial Liabilities [Abstract]
Long term debt	0	0
Short term Debt	0
Level 2 [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Notes receivable for the issuance of common stock		0
Mortgage loans	0	0
Financial Liabilities [Abstract]
Long term debt	2,478	2,883
Short term Debt	366
Level 3 [Member] | Estimated Fair Value [Member]
Financial Assets [Abstract]
Notes receivable for the issuance of common stock		1
Mortgage loans	660	608
Financial Liabilities [Abstract]
Long term debt	0	$ 0
Short term Debt	$ 0

Claim and Claim Adjustment Ex43

Claim and Claim Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		48 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2010
Catastrophe losses net of reinsurance	$ 14	$ 17	$ 103	$ 147
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(175)	(26)	(187)	23
Specialty [Member]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(130)	(79)	(141)	(123)
Commercial [Member]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(11)	71	0	179
Net Prior Year Claim and Allocated Claim Adjustment Expense Reserve Development, Workers' Compensation Reinsurance Pool		(26)		(26)
Loss Portfolio Transfer [Member]
Net A&EP claim and allocated claim adjustment expense reserves ceded to NICO							$ 1,600
Aggregate limit under AEP Loss Portfolio Transfer							4,000
A&EP claim and allocated claim adjustment expense reserves ceded under existing third party reinsurance contracts transferred to NICO under A&EP Loss Portfolio Transfer							1,200
Reinsurance premium paid to NICO under A&EP Loss Portfolio Transfer							2,000
Net reinsurance receivables transferrred to NICO under A&EP Loss Portfolio Transfer							215
Total consideration paid to NICO under A&EP Loss Portfolio Transfer							$ 2,200
Net AEP adverse development before consideration of LPT	0	$ 0	150	$ 0	$ 900
Cumulative amounts ceded under A&EP Loss Portfolio Transfer	2,600		2,600			$ 2,500
Deferred reinsurance benefit yet to be recognized	251		251			176
Fair value of collateral trust account established by NICO under A&EP Loss Portfolio Transfer	$ 2,800		$ 2,800			$ 3,400

Claim and Claim Adjustment Ex44

Claim and Claim Adjustment Expense Reserves (Net prior year development) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (175)	$ (26)	$ (187)	$ 23
Pretax (favorable) unfavorable premium development, excluding Life & Group	(5)	3	(11)	(30)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(180)	(23)	(198)	(7)
Specialty [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(130)	(79)	(141)	(123)
Pretax (favorable) unfavorable premium development, excluding Life & Group	(2)	(4)	(10)	(12)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(132)	(83)	(151)	(135)
Commercial [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(11)	71	0	179
Pretax (favorable) unfavorable premium development, excluding Life & Group	(5)	0	(17)	(24)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(16)	71	(17)	155
International [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(34)	(17)	(46)	(32)
Pretax (favorable) unfavorable premium development, excluding Life & Group	2	7	16	6
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(32)	(10)	(30)	(26)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	0	(1)	0	(1)
Pretax (favorable) unfavorable premium development, excluding Life & Group	0	0	0	0
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	$ 0	$ (1)	$ 0	$ (1)

Claim and Claim Adjustment Ex45

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (175)	$ (26)	$ (187)	$ 23
Specialty [Member]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(130)	(79)	(141)	(123)
Medical Professional Liability	(19)	16	(11)	17
Other Professional Liability and Management Liability	(37)	(9)	(41)	(59)
Surety	(70)	(79)	(69)	(78)
Warranty	0	0	1	0
Other	$ (4)	$ (7)	$ (21)	$ (3)

Claim and Claim Adjustment Ex46

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (175)	$ (26)	$ (187)	$ 23
Commercial [Member]
Commercial Auto	0	13	7	52
General Liability	3	44	8	76
Workers' Compensation	(1)	25	22	75
Property and Other	(13)	(11)	(37)	(24)
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (11)	$ 71	$ 0	$ 179

Claim and Claim Adjustment Ex47

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (175)	$ (26)	$ (187)	$ 23
International [Member]
Medical Professional Liability	(8)	(3)	(8)	(2)
Other Professional Liability	(11)	1	(16)	(14)
Liability	(5)	(3)	(12)	(9)
Property & Marine	(5)	(11)	(19)	(10)
Other	(5)	(1)	9	(7)
Commutations	0	0	0	10
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (34)	$ (17)	$ (46)	$ (32)

Claim and Claim Adjustment Ex48

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, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2013
Net AEP adverse development before consideration of LPT	$ 0	$ 0	$ 150	$ 0	$ 900
Provision for uncollectible third-party reinsurance on AEP	0	0	0	0
Additional amounts ceded under LPT	0	0	150	0
Retroactive reinsurance benefit recognized	(4)	(4)	(75)	(9)
Pretax impact of deferred retroactive reinsurance benefit	$ (4)	$ (4)	$ 75	$ (9)

Benefit Plans (Components of ne

Benefit Plans (Components of net periodic cost (benefit)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain				$ (86)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 3	$ 4	7
Interest cost on projected benefit obligation	29	33	85	99
Expected return on plan assets	(44)	(48)	(131)	(144)
Amortization of net actuarial (gain) loss	7	6	26	19
Net periodic (benefit) cost	(8)	(6)	(16)	(19)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	0	0	0	1
Amortization of prior service credit	(1)	0	(2)	(9)
Amortization of net actuarial (gain) loss	0	0	1	0
Curtailment gain	0	0	0	(86)
Net periodic (benefit) cost	$ (1)	$ 0	$ (1)	$ (94)

Benefit Plans (Narrative) (Deta

Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plan, Curtailments	$ 55
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		$ 86
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%	3.10%	3.85%	3.60%

Commitments, Contingencies, a51

Commitments, Contingencies, and Guarantees (Narrative) (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Property Lease Guarantee [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 28
Guarantee and indemnification agreements [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Current Carrying Value	5	$ 5
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	375
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	260
Structured settlement annuities [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 2,000

Accumulated Other Comprehensi52

Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ 143	$ 962	$ 400	$ 442
Transfer to net assets held for sale				0
Other comprehensive income (loss), before reclassifications	(118)	(136)	(385)	448
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(35)	53	(45)	117
Other comprehensive income (loss) after tax (expense) benefit	(83)	(189)	(340)	331
Accumulated other comprehensive income (loss), ending balance	60	773	60	773
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	19	(33)	31	(68)
Tax (expense) benefit on other comprehensive income (loss)	18	87	113	(176)
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	35	36	26
Transfer to net assets held for sale				(5)
Other comprehensive income (loss), before reclassifications	2	1	(3)	15
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	0	0	0	0
Other comprehensive income (loss) after tax (expense) benefit	2	1	(3)	15
Accumulated other comprehensive income (loss), ending balance	33	36	33	36
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Tax (expense) benefit on other comprehensive income (loss)	(1)	(1)	1	(8)
Net unrealized gains (losses) on other investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	689	1,182	942	692
Transfer to net assets held for sale				(17)
Other comprehensive income (loss), before reclassifications	(67)	(59)	(318)	462
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(31)	24	(29)	38
Other comprehensive income (loss) after tax (expense) benefit	(36)	(83)	(289)	424
Accumulated other comprehensive income (loss), ending balance	653	1,099	653	1,099
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	17	(12)	22	(20)
Tax (expense) benefit on other comprehensive income (loss)	21	64	140	(209)
Accumulated Net Unrealized Gains Losses on discontinued operations [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance		37		0
Transfer to net assets held for sale				22
Other comprehensive income (loss), before reclassifications		(3)		12
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit		34		34
Other comprehensive income (loss) after tax (expense) benefit		(37)		(22)
Accumulated other comprehensive income (loss), ending balance		0		0
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)		(23)		(23)
Tax (expense) benefit on other comprehensive income (loss)		25		15
Pension and postretirement benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(585)	(476)	(633)	(426)
Transfer to net assets held for sale				0
Other comprehensive income (loss), before reclassifications	0	(2)	36	(2)
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(4)	(5)	(16)	45
Other comprehensive income (loss) after tax (expense) benefit	4	3	52	(47)
Accumulated other comprehensive income (loss), ending balance	(581)	(473)	(581)	(473)
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	2	2	9	(25)
Tax (expense) benefit on other comprehensive income (loss)	(2)	(1)	(28)	26
Cumulative foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	8	184	55	150
Transfer to net assets held for sale				0
Other comprehensive income (loss), before reclassifications	(53)	(73)	(100)	(39)
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	0	0	0	0
Other comprehensive income (loss) after tax (expense) benefit	(53)	(73)	(100)	(39)
Accumulated other comprehensive income (loss), ending balance	(45)	111	(45)	111
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Tax (expense) benefit on other comprehensive income (loss)	$ 0	$ 0	$ 0	$ 0

Business Segments (Income State

Business Segments (Income Statement Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenues
Net earned premiums	$ 1,751	$ 1,810	$ 5,173	$ 5,427
Net investment income	354	480	1,412	1,556
Other revenues	97	84	286	262
Total operating revenues	2,202	2,374	6,871	7,245
Claims, Benefits and Expenses
Net incurred claims and benefits	1,198	1,351	3,999	4,231
Policyholders' dividends	2	3	9	10
Amortization of deferred acquisition costs	319	332	936	996
Other insurance related expenses	263	260	790	781
Other expenses	138	172	388	341
Total claims, benefits and expenses	1,920	2,118	6,122	6,359
Operating income (loss) before income tax	282	256	749	886
Income tax (expense) benefit on operating income (loss)	(72)	(74)	(182)	(242)
Net operating income (loss)	210	182	567	644
Net realized investment gains (losses), pre-tax	(49)	37	(39)	69
Income tax (expense) benefit on net realized investment gains (losses)	17	(10)	21	(23)
Net realized investment gains (losses), after tax	(32)	27	(18)	46
Net income (loss) from continuing operations	178	209	549	690
Specialty [Member]
Operating Revenues
Net earned premiums	706	725	2,075	2,126
Net investment income	76	126	365	423
Other revenues	86	76	245	218
Total operating revenues	868	927	2,685	2,767
Claims, Benefits and Expenses
Net incurred claims and benefits	307	367	1,152	1,213
Policyholders' dividends	1	2	3	4
Amortization of deferred acquisition costs	150	151	440	442
Other insurance related expenses	67	65	202	197
Other expenses	73	65	209	191
Total claims, benefits and expenses	598	650	2,006	2,047
Operating income (loss) before income tax	270	277	679	720
Income tax (expense) benefit on operating income (loss)	(91)	(93)	(228)	(240)
Net operating income (loss)	179	184	451	480
Net realized investment gains (losses), pre-tax	(22)	3	(18)	9
Income tax (expense) benefit on net realized investment gains (losses)	8	(1)	7	(3)
Net realized investment gains (losses), after tax	(14)	2	(11)	6
Net income (loss) from continuing operations	165	186	440	486
Commercial [Member]
Operating Revenues
Net earned premiums	705	721	2,086	2,188
Net investment income	82	157	455	549
Other revenues	9	10	27	28
Total operating revenues	796	888	2,568	2,765
Claims, Benefits and Expenses
Net incurred claims and benefits	427	549	1,388	1,727
Policyholders' dividends	1	1	6	6
Amortization of deferred acquisition costs	118	122	352	371
Other insurance related expenses	128	125	385	376
Other expenses	10	10	23	25
Total claims, benefits and expenses	684	807	2,154	2,505
Operating income (loss) before income tax	112	81	414	260
Income tax (expense) benefit on operating income (loss)	(37)	(29)	(141)	(85)
Net operating income (loss)	75	52	273	175
Net realized investment gains (losses), pre-tax	(29)	2	(23)	7
Income tax (expense) benefit on net realized investment gains (losses)	8	3	7	(1)
Net realized investment gains (losses), after tax	(21)	5	(16)	6
Net income (loss) from continuing operations	54	57	257	181
International [Member]
Operating Revenues
Net earned premiums	203	225	601	697
Net investment income	13	15	40	46
Other revenues	1	0	0	0
Total operating revenues	217	240	641	743
Claims, Benefits and Expenses
Net incurred claims and benefits	106	134	336	382
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	45	52	125	161
Other insurance related expenses	33	37	101	113
Other expenses	9	8	9	20
Total claims, benefits and expenses	193	231	571	676
Operating income (loss) before income tax	24	9	70	67
Income tax (expense) benefit on operating income (loss)	(15)	(4)	(30)	(26)
Net operating income (loss)	9	5	40	41
Net realized investment gains (losses), pre-tax	(1)	1	1	1
Income tax (expense) benefit on net realized investment gains (losses)	1	(2)	0	(1)
Net realized investment gains (losses), after tax	0	(1)	1	0
Net income (loss) from continuing operations	9	4	41	41
Life and Group Non-Core [Member]
Operating Revenues
Net earned premiums	137	139	412	417
Net investment income	182	177	540	521
Other revenues	(1)	(3)	8	10
Total operating revenues	318	313	960	948
Claims, Benefits and Expenses
Net incurred claims and benefits	361	319	1,045	929
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	6	7	19	22
Other insurance related expenses	35	33	104	96
Other expenses	1	36	10	34
Total claims, benefits and expenses	403	395	1,178	1,081
Operating income (loss) before income tax	(85)	(82)	(218)	(133)
Income tax (expense) benefit on operating income (loss)	55	40	147	98
Net operating income (loss)	(30)	(42)	(71)	(35)
Net realized investment gains (losses), pre-tax	2	30	(2)	42
Income tax (expense) benefit on net realized investment gains (losses)	0	(9)	8	(14)
Net realized investment gains (losses), after tax	2	21	6	28
Net income (loss) from continuing operations	(28)	(21)	(65)	(7)
Corporate and Other Non-Core [Member]
Operating Revenues
Net earned premiums	0	0	0	0
Net investment income	1	5	12	17
Other revenues	4	3	9	10
Total operating revenues	5	8	21	27
Claims, Benefits and Expenses
Net incurred claims and benefits	(3)	(18)	78	(20)
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	0	0	0	0
Other insurance related expenses	0	0	(1)	0
Other expenses	47	55	140	75
Total claims, benefits and expenses	44	37	217	55
Operating income (loss) before income tax	(39)	(29)	(196)	(28)
Income tax (expense) benefit on operating income (loss)	16	12	70	11
Net operating income (loss)	(23)	(17)	(126)	(17)
Net realized investment gains (losses), pre-tax	1	1	3	10
Income tax (expense) benefit on net realized investment gains (losses)	0	(1)	(1)	(4)
Net realized investment gains (losses), after tax	1	0	2	6
Net income (loss) from continuing operations	(22)	(17)	(124)	(11)
Eliminations [Member]
Operating Revenues
Net earned premiums	0	0	(1)	(1)
Net investment income	0	0	0	0
Other revenues	(2)	(2)	(3)	(4)
Total operating revenues	(2)	(2)	(4)	(5)
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	(2)	(2)	(3)	(4)
Total claims, benefits and expenses	(2)	(2)	(4)	(5)
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) from continuing operations	$ 0	$ 0	$ 0	$ 0

Business Segments (Balance Shee

Business Segments (Balance Sheet Information) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Reinsurance receivables	$ 4,539	$ 4,742
Insurance receivables	2,111	1,997
Deferred acquisition costs	606	600
Goodwill	151	152
Insurance reserves
Claim and claim adjustment expenses	22,867	23,271
Unearned premiums	3,706	3,592
Future policy benefits	9,520	9,490
Policyholders’ funds	0	27
Specialty [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	619	567
Insurance receivables	851	778
Deferred acquisition costs	305	304
Goodwill	117	117
Insurance reserves
Claim and claim adjustment expenses	6,199	6,229
Unearned premiums	1,817	1,763
Future policy benefits	0	0
Policyholders’ funds		9
Commercial [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	664	690
Insurance receivables	996	954
Deferred acquisition costs	216	213
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	9,283	9,514
Unearned premiums	1,307	1,273
Future policy benefits	0	0
Policyholders’ funds		18
International [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	172	207
Insurance receivables	252	250
Deferred acquisition costs	85	83
Goodwill	34	35
Insurance reserves
Claim and claim adjustment expenses	1,365	1,441
Unearned premiums	455	431
Future policy benefits	0	0
Policyholders’ funds		0
Life and Group Non-Core [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	517	525
Insurance receivables	10	13
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	3,286	3,183
Unearned premiums	127	125
Future policy benefits	9,520	9,490
Policyholders’ funds		0
Corporate and Other Non-Core [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	2,567	2,753
Insurance receivables	2	2
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	2,734	2,904
Unearned premiums	0	0
Future policy benefits	0	0
Policyholders’ funds		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
Policyholders’ funds		$ 0

Business Segments (Revenues by

Business Segments (Revenues by Line of Business) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 2,153	$ 2,411	$ 6,832	$ 7,314
Specialty [Domain]
Revenues	846	930	2,667	2,776
Management & Professional Liability [Member]
Revenues	605	699	1,976	2,113
Surety [Member]
Revenues	132	133	377	380
Warranty & Alternative Risks [Member]
Revenues	109	98	314	283
Commercial [Domain]
Revenues	767	890	2,545	2,772
Middle Markets [Member]
Revenues	386	404	1,207	1,219
Small Business [Member]
Revenues	144	170	467	535
Other Commercial Insurance [Member]
Revenues	237	316	871	1,018
International [Domain]
Revenues	216	241	642	744
Canada [Member]
Revenues	52	69	161	210
CNA Europe [Member]
Revenues	78	83	232	254
Hardy [Member]
Revenues	86	89	249	280
Life & Group Non-Core [Domain]
Revenues	320	343	958	990
Corporate and Other [Domain]
Revenues	6	9	24	37
Intersegment Eliminations [Domain]
Revenues	$ (2)	$ (2)	$ (4)	$ (5)

Discontinued Operations Income

Discontinued Operations Income Statement Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Net Investment Income		$ 14		$ 94
Net Realized Investment Gains (Losses)		1		3
Total Revenues		15		97
Claims, Benefits and Expenses
Insurance Claims and Policyholders' Benefits		12		75
Other Operating Expenses		0		2
Total Claims, Benefits and Expenses		12		77
Income before Income Tax		3		20
Income tax (expense) benefit		(2)		(6)
Income from operations of discontinued operations, net of income tax		1		14
Loss on sale, net of income tax benefit		3		(211)
Income (Loss) from Discontinued Operations	$ 0	4	$ 0	(197)
Income tax benefit (expense) on sale		$ (1)		$ 40