CNA Financial (CNA) 10-Q 4 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 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	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		270,260,295

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Net earned premiums	$ 1,735	$ 1,811	$ 3,422	$ 3,617
Net investment income	500	550	1,058	1,076
Net realized investment gains (losses):
Other-than-temporary impairment losses	(31)	(5)	(43)	(7)
Portion of other-than-temporary impairments recognized in Other comprehensive income	0	0	0	0
Net other-than-temporary impairment losses recognized in earnings	(31)	(5)	(43)	(7)
Other net realized investment gains (loss)	31	(9)	53	39
Net realized investment gains (losses)	0	(14)	10	32
Other revenues	92	93	189	178
Total revenues	2,327	2,440	4,679	4,903
Claims, Benefits and Expenses
Insurance claims and policyholders' benefits	1,469	1,441	2,808	2,887
Amortization of deferred acquisition costs	314	335	617	664
Other operating expenses	341	254	699	600
Interest	39	46	78	90
Total claims, benefits and expenses	2,163	2,076	4,202	4,241
Income (loss) from continuing operations before income tax	164	364	477	662
Income tax (expense) benefit	(26)	(103)	(106)	(181)
Net income (loss) from continuing operations	138	261	371	481
(Loss) income from discontinued operations, net of income tax benefit (expense)	0	6	0	(201)
Net income (loss)	$ 138	$ 267	$ 371	$ 280
Basic Earnings (Loss) Per Share Attributable to CNA
Income from continuing operations	$ 0.51	$ 0.97	$ 1.37	$ 1.78
(Loss) income from discontinued operations	0	0.02	0	(0.74)
Basic earnings per share	0.51	0.99	1.37	1.04
Diluted Earnings (Loss) Per Share Attributable to CNA
Income (loss) from continuing operations	0.51	0.97	1.37	1.78
(Loss) income from discontinued operations	0	0.01	0	(0.75)
Diluted earnings (loss) per share	0.51	0.98	1.37	1.03
Dividends per share	$ 0.25	$ 0.25	$ 2.50	$ 1.50
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	270.3	269.9	270.2	269.9
Diluted	270.7	270.6	270.7	270.5

Consolidated Statements of Ope3

Consolidated Statements of Operations Parenthetical (Parentheticals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Income tax (expense) benefit on discontinued operations	$ 0	$ (1)	$ 0	$ 37

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Comprehensive Income (Loss), Net of Tax, Changes In:
Net unrealized gains (losses) on investments with other-than-temporary impairments	$ (4)	$ 2	$ (5)	$ 14
Net unrealized gains (losses) on other investments	(365)	270	(253)	507
Net unrealized gains (losses) on investments	(369)	272	(258)	521
Net unrealized gains (losses) on discontinued operations	0	7	0	15
Foreign currency translation adjustment	49	42	(47)	34
Pension and postretirement benefits	42	(51)	48	(50)
Other comprehensive income (loss)	(278)	270	(257)	520
Net income (loss)	138	267	371	280
Total comprehensive income (loss)	$ (140)	$ 537	$ 114	$ 800

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Investments:
Fixed maturity securities at fair value	$ 39,849	$ 40,768
Equity securities at fair value	216	222
Limited partnership investments	2,930	2,937
Other invested assets	43	41
Mortgage loans	622	588
Short term investments	1,672	1,706
Total investments	45,332	46,262
Cash	145	190
Reinsurance receivables	4,654	4,694
Insurance receivables	2,187	1,936
Accrued investment income	397	405
Deferred acquisition costs	621	600
Deferred income taxes	255	191
Property and equipment at cost	317	295
Goodwill	153	152
Other assets	961	841
Total assets	55,022	55,566
Insurance reserves:
Claim and claim adjustment expenses	23,193	23,271
Unearned premiums	3,815	3,592
Future policy benefits	9,360	9,490
Policyholders’ funds	0	27
Long term debt	2,560	2,559
Other liabilities	3,860	3,833
Total liabilities	42,788	42,772
Stockholders' Equity
Common stock	683	683
Additional paid-in capital	2,146	2,151
Retained earnings	9,340	9,645
Accumulated other comprehensive income (loss)	143	400
Treasury stock	(78)	(84)
Notes receivable for the issuance of common stock	0	(1)
Total stockholders’ equity	12,234	12,794
Total liabilities and stockholders' equity	$ 55,022	$ 55,566

Consolidated Balance Sheet Pare

Consolidated Balance Sheet Parentheticals (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed maturities securities at amortized cost	$ 37,199	$ 37,335
Equity securities at cost	208	210
Reinsurance Recoverables, Allowance	48	48
Premiums Receivable, Allowance for Doubtful Accounts	58	61
Accumulated depreciation on property and equipment	376	364
Due to Related Parties	$ 72	$ 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	270,259,928	269,980,202
Treasury stock, shares	2,780,315	3,060,041

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities
Net income (loss)	$ 371	$ 280
Adjustments to reconcile net income (loss) to net cash flows provided (used) by operating activities:
Impairment loss on sale of subsidiary	0	255
Deferred income tax expense (benefit)	32	48
Trading portfolio activity	1	17
Net realized investment (gains) losses	(10)	(34)
Equity method investees	(48)	75
Net amortization of investments	(13)	0
Depreciation and amortization	39	42
Changes in:
Receivables, net	(211)	6
Accrued investment income	8	(3)
Deferred acquisition costs	(8)	(10)
Insurance reserves	451	234
Other assets	(60)	(50)
Other liabilities	(94)	(201)
Other, net	82	(72)
Total adjustments	169	307
Net cash flows provided (used) by operating activities	540	587
Dispositions:
Fixed maturity securities - sales	2,859	2,919
Fixed maturity securities - maturities, calls and redemptions	2,304	1,954
Equity securities	33	14
Limited partnerships	85	118
Mortgage loans	19	33
Purchases:
Fixed maturity securities	(5,029)	(4,921)
Equity securities	(30)	(11)
Limited partnerships	(78)	(109)
Mortgage Loans	(60)	(43)
Change in other investments	8	10
Change in short term investments	33	(678)
Purchases of property and equipment	(57)	(27)
Other, net	0	7
Net cash flows provided (used) by investing activities	87	(734)
Cash Flows from Financing Activities
Dividends paid to common stockholders	(676)	(406)
Proceeds from the issuance of debt	0	546
Other, net	6	23
Net cash flows provided (used) by financing activities	(670)	163
Effect of foreign exchange rate changes on cash	(2)	2
Transfer of cash to assets held for sale	0	(9)
Net change in cash	(45)	9
Cash, beginning of year	190	195
Cash, end of period	$ 145	$ 204

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 Jun. 30, 2014	683
Balance, beginning of year at Dec. 31, 2013	2,145
Additional Paid-in Capital
Stock-based compensation	1
Balance, end of period at Jun. 30, 2014	2,146
Balance, beginning of year at Dec. 31, 2013	9,495
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(406)
Net income (loss)	280
Balance, end of period at Jun. 30, 2014	9,369
Accumulated other comprehensive income (loss), beginning balance at Dec. 31, 2013	442
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss)	520
Accumulated other comprehensive income (loss), ending balance at Jun. 30, 2014	962
Balance, beginning of year at Dec. 31, 2013	(91)
Treasury Stock
Stock Based Compensation and Other	6
Balance, end of period at Jun. 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 Jun. 30, 2014	(1)
Balance, end of period at Jun. 30, 2014	683
Balance, end of period at Jun. 30, 2014	2,146
Retained Earnings (Accumulated Deficit)
Net income (loss)	267
Balance, end of period at Jun. 30, 2014	9,369
Accumulated other comprehensive income (loss), beginning balance at Mar. 31, 2014	692
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss)	270
Accumulated other comprehensive income (loss), ending balance at Jun. 30, 2014	962
Balance, end of period at Jun. 30, 2014	(85)
Balance, end of period at Jun. 30, 2014	(1)
Notes Receivable for the Issuance of Common Stock
Total stockholders’ equity	13,074
Total stockholders’ equity	12,794
Balance, beginning of year at Dec. 31, 2014	683
Balance, end of period at Jun. 30, 2015	683
Balance, beginning of year at Dec. 31, 2014	2,151
Additional Paid-in Capital
Stock-based compensation	(5)
Balance, end of period at Jun. 30, 2015	2,146
Balance, beginning of year at Dec. 31, 2014	9,645
Retained Earnings (Accumulated Deficit)
Dividends paid to common stockholders	(676)
Net income (loss)	371
Balance, end of period at Jun. 30, 2015	9,340
Accumulated other comprehensive income (loss), beginning balance at Dec. 31, 2014	400
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss)	(257)
Accumulated other comprehensive income (loss), ending balance at Jun. 30, 2015	143
Balance, beginning of year at Dec. 31, 2014	(84)
Treasury Stock
Stock Based Compensation and Other	6
Balance, end of period at Jun. 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 Jun. 30, 2015	0
Balance, end of period at Jun. 30, 2015	683
Balance, end of period at Jun. 30, 2015	2,146
Retained Earnings (Accumulated Deficit)
Net income (loss)	138
Balance, end of period at Jun. 30, 2015	9,340
Accumulated other comprehensive income (loss), beginning balance at Mar. 31, 2015	421
Accumulated Other Comprehensive Income (Loss)
Other comprehensive income (loss)	(278)
Accumulated other comprehensive income (loss), ending balance at Jun. 30, 2015	143
Balance, end of period at Jun. 30, 2015	(78)
Balance, end of period at Jun. 30, 2015	0
Notes Receivable for the Issuance of Common Stock
Total stockholders’ equity	$ 12,234

General

General	6 Months Ended
	Jun. 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 (Unaudited) 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 June 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 at 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 June 30, 2015 and for the three and six months ended June 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. In the first quarter of 2014, the Company recorded an after-tax impairment loss of $214 million related to the sale. 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. Recently Issued Accounting Standards Update - Disclosures about Short-Duration Contracts In May of 2015, the Financial Accounting Standards Board issued updated accounting guidance requiring 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	6 Months Ended
	Jun. 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 six months ended June 30, 2015 , approximately 423 thousand and 543 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 238 thousand and 208 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 six months ended June 30, 2014 , approximately 622 thousand and 644 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 110 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	6 Months Ended
	Jun. 30, 2015
Investments [Abstract]
Investments	Note C . Investments The significant components of Net investment income are presented in the following table. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Fixed maturity securities $ 452 $ 451 $ 895 $ 903 Short term investments — — 2 1 Limited partnership investments 48 97 162 170 Equity securities 3 3 6 5 Mortgage loans 9 9 17 15 Trading portfolio 3 3 5 6 Other — 1 — 3 Gross investment income 515 564 1,087 1,103 Investment expense (15 ) (14 ) (29 ) (27 ) Net investment income $ 500 $ 550 $ 1,058 $ 1,076 Net realized investment gains (losses) are presented in the following table. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Net realized investment gains (losses): Fixed maturity securities: Gross realized gains $ 36 $ 20 $ 69 $ 73 Gross realized losses (48 ) (39 ) (69 ) (54 ) Net realized investment gains (losses) on fixed maturity securities (12 ) (19 ) — 19 Equity securities: Gross realized gains — — 1 5 Gross realized losses (1 ) — (2 ) — Net realized investment gains (losses) on equity securities (1 ) — (1 ) 5 Derivative financial instruments 11 1 10 1 Short term investments and other 2 4 1 7 Net realized investment gains (losses) $ — $ (14 ) $ 10 $ 32 The components of Net other-than-temporary impairment (OTTI) losses recognized in earnings by asset type are presented in the following table. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Fixed maturity securities available-for-sale: Corporate and other bonds $ 11 $ 2 $ 16 $ 3 States, municipalities and political subdivisions 13 — 18 — Asset-backed: Residential mortgage-backed 5 1 6 2 Other asset-backed 1 1 1 1 Total asset-backed 6 2 7 3 Total fixed maturity securities available-for-sale 30 4 41 6 Equity securities available-for-sale -- Common stock — 1 1 1 Short term investments 1 — 1 — Net OTTI losses recognized in earnings $ 31 $ 5 $ 43 $ 7 The following tables present a summary of fixed maturity and equity securities. June 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 $ 16,863 $ 1,337 $ 88 $ 18,112 $ — States, municipalities and political subdivisions 11,707 1,186 40 12,853 — Asset-backed: Residential mortgage-backed 4,940 175 15 5,100 (46 ) Commercial mortgage-backed 2,186 77 12 2,251 (2 ) Other asset-backed 1,044 12 1 1,055 — Total asset-backed 8,170 264 28 8,406 (48 ) U.S. Treasury and obligations of government-sponsored enterprises 24 5 — 29 — Foreign government 387 13 1 399 — Redeemable preferred stock 33 2 — 35 — Total fixed maturity securities available-for-sale 37,184 2,807 157 39,834 $ (48 ) Total fixed maturity securities trading 15 15 Equity securities available-for-sale: Common stock 54 8 2 60 Preferred stock 154 4 2 156 Total equity securities available-for-sale 208 12 4 216 Total $ 37,407 $ 2,819 $ 161 $ 40,065 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 June 30, 2015 and December 31, 2014 , the net unrealized gains on investments included in AOCI were net of after-tax Shadow Adjustments of $1,022 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 June 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 $ 3,201 $ 73 $ 152 $ 15 $ 3,353 $ 88 States, municipalities and political subdivisions 1,523 34 143 6 1,666 40 Asset-backed: Residential mortgage-backed 451 6 167 9 618 15 Commercial mortgage-backed 557 9 61 3 618 12 Other asset-backed 135 1 18 — 153 1 Total asset-backed 1,143 16 246 12 1,389 28 U.S. Treasury and obligations of government-sponsored enterprises 3 — — — 3 — Foreign government 20 1 1 — 21 1 Total fixed maturity securities available-for-sale 5,890 124 542 33 6,432 157 Equity securities available-for-sale: Common Stock 21 2 — — 21 2 Preferred stock 17 2 — — 17 2 Total $ 5,928 $ 128 $ 542 $ 33 $ 6,470 $ 161 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 June 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 June 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 June 30, 2015 and 2014 for which a portion of an OTTI loss was recognized in Other comprehensive income. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Beginning balance of credit losses on fixed maturity securities $ 61 $ 69 $ 62 $ 74 Reductions for securities sold during the period (2 ) (3 ) (3 ) (5 ) 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 $ 59 $ 66 $ 59 $ 66 Contractual Maturity The following table presents available-for-sale fixed maturity securities by contractual maturity. June 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 $ 1,539 $ 1,559 $ 2,479 $ 2,511 Due after one year through five years 7,507 7,956 9,054 9,605 Due after five years through ten years 14,099 14,549 12,055 12,584 Due after ten years 14,039 15,770 13,728 16,049 Total $ 37,184 $ 39,834 $ 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. June 30, 2015 Contractual/ Notional Amount Estimated Fair Value (In millions) Asset Liability Without hedge designation Equity warrants $ 5 $ — $ — Embedded derivative on funds withheld liability 183 — (6 ) Total $ — $ (6 ) 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 June 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 June 30, 2015 , the Company had committed approximately $295 million to future capital calls from various third-party limited partnership investments in exchange for an ownership interest in the related partnerships. As of June 30, 2015 , the Company had a mortgage loan commitment of $6 million representing a signed loan application 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 June 30, 2015 , the Company had commitments to purchase or fund additional amounts of $134 million and sell $79 million under the terms of such securities.

Fair Value

Fair Value	6 Months Ended
	Jun. 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. June 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 $ 17,958 $ 141 $ 18,127 States, municipalities and political subdivisions — 12,768 85 12,853 Asset-backed: Residential mortgage-backed — 4,893 207 5,100 Commercial mortgage-backed — 2,164 87 2,251 Other asset-backed — 565 490 1,055 Total asset-backed — 7,622 784 8,406 U.S. Treasury and obligations of government-sponsored enterprises 28 1 — 29 Foreign government 32 367 — 399 Redeemable preferred stock 24 11 — 35 Total fixed maturity securities 112 38,727 1,010 39,849 Equity securities 139 61 16 216 Other invested assets — 43 — 43 Short term investments 692 900 — 1,592 Life settlement contracts, included in Other assets — — 75 75 Total assets $ 943 $ 39,731 $ 1,101 $ 41,775 Liabilities Other liabilities $ — $ (6 ) $ — $ (6 ) Total liabilities $ — $ (6 ) $ — $ (6 ) 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 April 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 June 30, 2015 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2015 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 186 $ (2 ) $ (1 ) $ — $ — $ (7 ) $ — $ (35 ) $ 141 $ (3 ) States, municipalities and political subdivisions 86 — — — — (1 ) — — 85 — Asset-backed: Residential mortgage-backed 232 1 (2 ) — — (11 ) — (13 ) 207 — Commercial mortgage-backed 64 1 (1 ) 9 — (1 ) 17 (2 ) 87 — Other asset-backed 553 2 1 47 (90 ) (17 ) — (6 ) 490 — Total asset-backed 849 4 (2 ) 56 (90 ) (29 ) 17 (21 ) 784 — Total fixed maturity securities 1,121 2 (3 ) 56 (90 ) (37 ) 17 (56 ) 1,010 (3 ) Equity securities 13 — 3 — — — — — 16 — Life settlement contracts 79 4 — — — (8 ) — — 75 (2 ) Total $ 1,213 $ 6 $ — $ 56 $ (90 ) $ (45 ) $ 17 $ (56 ) $ 1,101 $ (5 ) Level 3 (In millions) Balance as of April 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 June 30, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 189 $ 1 $ — $ 21 $ (6 ) $ (5 ) $ 5 $ (11 ) $ 194 $ — States, municipalities and political subdivisions 86 1 1 1 (10 ) — — — 79 — Asset-backed: Residential mortgage-backed 359 (24 ) 47 22 (174 ) (19 ) — (26 ) 185 — Commercial mortgage-backed 126 1 1 — (60 ) (1 ) 12 (20 ) 59 — Other asset-backed 439 — 4 229 (28 ) (18 ) — — 626 (1 ) Total asset-backed 924 (23 ) 52 251 (262 ) (38 ) 12 (46 ) 870 (1 ) Total fixed maturity securities 1,199 (21 ) 53 273 (278 ) (43 ) 17 (57 ) 1,143 (1 ) Equity securities 2 — — — — — — — 2 — Life settlement contracts 87 12 — — — (13 ) — — 86 1 Total $ 1,288 $ (9 ) $ 53 $ 273 $ (278 ) $ (56 ) $ 17 $ (57 ) $ 1,231 $ — 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 June 30, 2015 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2015 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 162 $ (1 ) $ (1 ) $ 12 $ (12 ) $ (21 ) $ 37 $ (35 ) $ 141 $ (3 ) States, municipalities and political subdivisions 94 1 — — — (10 ) — — 85 — Asset-backed: Residential mortgage-backed 189 2 (2 ) 72 — (21 ) — (33 ) 207 — Commercial mortgage-backed 83 2 — 15 — (2 ) 17 (28 ) 87 — Other asset-backed 655 3 10 82 (234 ) (20 ) — (6 ) 490 — Total asset-backed 927 7 8 169 (234 ) (43 ) 17 (67 ) 784 — Total fixed maturity securities 1,183 7 7 181 (246 ) (74 ) 54 (102 ) 1,010 (3 ) Equity securities 16 — — — — — — — 16 — Life settlement contracts 82 17 — — — (24 ) — — 75 (1 ) Total $ 1,281 $ 24 $ 7 $ 181 $ (246 ) $ (98 ) $ 54 $ (102 ) $ 1,101 $ (4 ) 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 June 30, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 204 $ 2 $ 1 $ 26 $ (10 ) $ (10 ) $ 8 $ (27 ) $ 194 $ — States, municipalities and political subdivisions 71 1 2 1 (10 ) — 14 — 79 — Asset-backed: Residential mortgage-backed 331 (23 ) 62 47 (174 ) (40 ) 21 (39 ) 185 — Commercial mortgage-backed 151 2 — — (60 ) (2 ) 12 (44 ) 59 — Other asset-backed 446 1 4 377 (111 ) (90 ) — (1 ) 626 (1 ) Total asset-backed 928 (20 ) 66 424 (345 ) (132 ) 33 (84 ) 870 (1 ) Total fixed maturity securities 1,203 (17 ) 69 451 (365 ) (142 ) 55 (111 ) 1,143 (1 ) Equity securities 11 3 (4 ) — (8 ) — — — 2 — Life settlement contracts 88 22 — — — (24 ) — — 86 2 Separate account business 1 — — — — — — (1 ) — — Total $ 1,303 $ 8 $ 65 $ 451 $ (373 ) $ (166 ) $ 55 $ (112 ) $ 1,231 $ 1 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 six months ended June 30, 2015 there were no transfers between Level 1 and Level 2. During the three months ended June 30, 2014 there were $1 million of transfers from Level 2 to Level 1 and no transfers from Level 1 to Level 2. During the six months ended June 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, broker/dealer quotes 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. June 30, 2015 Estimated Fair Value (In millions) Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Fixed maturity securities $ 97 Discounted cash flow Credit spread 2% - 13% (3%) Life settlement contracts 75 Discounted cash flow Discount rate risk premium 9% Mortality assumption 55% - 1676% (165%) 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. June 30, 2015 Carrying Amount Estimated Fair Value (In millions) Level 1 Level 2 Level 3 Total Assets Mortgage loans $ 622 $ — $ — $ 640 $ 640 Liabilities Long term debt $ 2,560 $ — $ 2,843 $ — $ 2,843 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	6 Months Ended
	Jun. 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 $60 million and $89 million for the three and six months ended June 30, 2015 . Catastrophe losses in 2015 related primarily to U.S. weather-related events. The Company reported catastrophe losses, net of reinsurance, of $56 million and $130 million for the three and six months ended June 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 June 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 $ (13 ) $ 16 $ (8 ) $ — $ (5 ) Pretax (favorable) unfavorable premium development (2 ) (11 ) (2 ) — (15 ) Total pretax (favorable) unfavorable net prior year development $ (15 ) $ 5 $ (10 ) $ — $ (20 ) Three months ended June 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 $ (41 ) $ 90 $ (25 ) $ — $ 24 Pretax (favorable) unfavorable premium development (2 ) (6 ) 6 — (2 ) Total pretax (favorable) unfavorable net prior year development $ (43 ) $ 84 $ (19 ) $ — $ 22 Six months ended June 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 $ (11 ) $ 11 $ (12 ) $ — $ (12 ) Pretax (favorable) unfavorable premium development (8 ) (12 ) 14 — (6 ) Total pretax (favorable) unfavorable net prior year development $ (19 ) $ (1 ) $ 2 $ — $ (18 ) Six months ended June 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 $ (44 ) $ 108 $ (15 ) $ — $ 49 Pretax (favorable) unfavorable premium development (8 ) (24 ) (1 ) — (33 ) Total pretax (favorable) unfavorable net prior year development $ (52 ) $ 84 $ (16 ) $ — $ 16 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ (6 ) $ 1 $ 8 $ 1 Other Professional Liability and Management Liability (1 ) (44 ) (4 ) (50 ) Surety — — 1 1 Warranty 1 — 1 — Other (7 ) 2 (17 ) 4 Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (13 ) $ (41 ) $ (11 ) $ (44 ) Three Months 2015 Overall, favorable development in medical professional liability was primarily due to lower than expected severity for individual healthcare professionals and allied facilities in accident years 2009 through 2012. Unfavorable development was recorded related to increased claim frequency in the aging services business in accident years 2009 and 2010. Favorable development of $38 million was recorded in other professional liability and management liability related to lower than expected severity for professional services primarily in accident years 2010 and prior. Unfavorable development of $37 million was recorded primarily related to increased claim frequency on public company management liability in accident years 2012 through 2014. Favorable development for other coverages was primarily due to better than expected claim frequency in property coverages provided to Specialty customers in accident year 2014. 2014 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 lower than expected severity in accident years 2008 through 2011. Six Months 2015 Overall, unfavorable development for medical professional liability was primarily related to increased claim frequency in the aging services business for accident years 2009 through 2014, partially offset by lower than expected severity in accident years 2010 and prior. Additional favorable development was due to lower than expected severity for individual healthcare professionals and allied facilities in accident years 2009 through 2012. Favorable development of $41 million was recorded in other professional liability and management liability primarily related to lower than expected severity in accident years 2010 and prior for professional services. Unfavorable development of $37 million was recorded primarily related to increased claim frequency on public company management liability in accident years 2012 through 2014. Favorable development for other coverages was primarily due to better than expected claim frequency in property coverages provided to Specialty customers in accident year 2014. 2014 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 lower than expected severity in accident years 2008 through 2011. Commercial The following table presents further detail of the development recorded for the Commercial segment. The majority of the 2014 unfavorable development 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Commercial Auto $ 7 $ 19 $ 7 $ 39 General Liability 1 32 5 32 Workers' Compensation 24 39 23 50 Property and Other (16 ) — (24 ) (13 ) Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ 16 $ 90 $ 11 $ 108 Three Months 2015 In the aggregate, the unfavorable loss development of $16 million was driven by an extra contractual obligation loss and losses associated with premium development. The reserve development discussed below was largely offsetting. 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 catastrophe events and better than expected claim frequency of large claims in accident year 2014. 2014 Unfavorable development for commercial auto was primarily related to increased claim frequency of large losses in accident years 2010 through 2013. 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. Unfavorable development for workers’ compensation was primarily due to higher than expected severity related to Defense Base Act contractors in accident years 2012 and 2013. Six Months 2015 In addition to the favorable property development noted in the three month discussion, there was additional favorable development for property related to better than expected loss emergence from 2014 catastrophe events. 2014 Unfavorable development for commercial auto was primarily related to increased claim frequency of large losses in accident years 2010 through 2013. Additionally, unfavorable development was recorded for increased claim frequency in accident years 2012 and 2013 and higher than expected severity in accident years 2010 and 2011. 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. Unfavorable development for workers’ compensation was primarily due to higher than expected severity related to Defense Base Act contractors in accident years 2012 and 2013 and the recognition of losses related to favorable premium development in accident year 2013. Overall, favorable development for property and other coverages in accident years 2011 and prior primarily related to fewer claims than expected 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ — $ — $ — $ 1 Other Professional Liability (5 ) (14 ) (5 ) (15 ) Liability (2 ) (4 ) (7 ) (6 ) Property & Marine (8 ) (7 ) (14 ) 1 Other 7 — 14 (6 ) Commutations — — — 10 Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (8 ) $ (25 ) $ (12 ) $ (15 ) Three Months 2015 Favorable development in property and marine was due to better than expected emergence in accident years 2012 through 2014. Unfavorable development in other is due to 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. Six Months 2015 Favorable development in property and marine was due to better than expected emergence in accident years 2012 through 2014. Unfavorable development in other is due to 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. 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Net A&EP adverse development before consideration of LPT $ 150 $ — $ 150 $ — Provision for uncollectible third-party reinsurance on A&EP — — — — Additional amounts ceded under LPT 150 — 150 — Retroactive reinsurance benefit recognized (66 ) (1 ) (71 ) (5 ) Pretax impact of unrecognized deferred retroactive reinsurance benefit $ 84 $ (1 ) $ 79 $ (5 ) 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 unrecognized deferred retroactive reinsurance benefit is recorded in Insurance claims and policyholders' benefits in the Condensed Consolidated Statement of Operations. As of June 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 $255 million and $176 million as of June 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 $3.1 billion and $3.4 billion as of June 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	6 Months Ended
	Jun. 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	6 Months Ended
	Jun. 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pension cost (benefit) Service cost $ 2 $ 1 $ 4 $ 4 Interest cost on projected benefit obligation 28 33 56 66 Expected return on plan assets (44 ) (48 ) (87 ) (96 ) Amortization of net actuarial loss 10 7 19 13 Net periodic pension cost (benefit) $ (4 ) $ (7 ) $ (8 ) $ (13 ) Postretirement cost (benefit) Interest cost on projected benefit obligation $ — $ 1 $ — $ 1 Amortization of prior service credit (1 ) (5 ) (1 ) (9 ) Amortization of net actuarial loss 1 — 1 — Curtailment gain — (86 ) — (86 ) Net periodic postretirement cost (benefit) $ — $ (90 ) $ — $ (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 Savings and Capital Accumulation 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	6 Months Ended
	Jun. 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 June 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 $37 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 June 30, 2015 and December 31, 2014 , the Company had recorded liabilities of approximately $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 June 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 a previously owned subsidiary. In addition, the Company has agreed to provide indemnification to third-party purchasers for certain losses associated with sold business entities or assets that are not limited by a contractual monetary amount. As of June 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 June 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	6 Months Ended
	Jun. 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 April 1, 2015 $ 35 $ 1,054 $ (627 ) $ (41 ) $ 421 Other comprehensive income (loss) before reclassifications (4 ) (372 ) 36 49 (291 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $5, $4, $- and $9 — (7 ) (6 ) — (13 ) Other comprehensive income (loss) after tax (expense) benefit of $2, $181, $(23), $- and $160 (4 ) (365 ) 42 49 (278 ) Balance as of June 30, 2015 $ 31 $ 689 $ (585 ) $ 8 $ 143 (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 April 1, 2014 $ 33 $ 912 $ 30 $ (425 ) $ 142 $ 692 Other comprehensive income (loss) before reclassifications 2 257 7 — 42 308 Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $6, $-, $(28), $- and $(22) — (13 ) — 51 — 38 Other comprehensive income (loss) after tax (expense) benefit of $(1), $(146), $(5), $28, $- and $(124) 2 270 7 (51 ) 42 270 Balance as of June 30, 2014 $ 35 $ 1,182 $ 37 $ (476 ) $ 184 $ 962 (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 (5 ) (251 ) 36 (47 ) (267 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $5, $7, $- and $12 — 2 (12 ) — (10 ) Other comprehensive income (loss) after tax (expense) benefit of $2, $119, $(26), $- and $95 (5 ) (253 ) 48 (47 ) (257 ) Balance as of June 30, 2015 $ 31 $ 689 $ (585 ) $ 8 $ 143 (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 14 521 15 — 34 584 Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $(8), $-, $(27), $- and $(35) — 14 — 50 — 64 Other comprehensive income (loss) after tax (expense) benefit of $(7), $(273), $(10), $27, $- and $(263) 14 507 15 (50 ) 34 520 Balance as of June 30, 2014 $ 35 $ 1,182 $ 37 $ (476 ) $ 184 $ 962 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	6 Months Ended
	Jun. 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 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 June 30, 2015 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 689 $ 703 $ 207 $ 137 $ — $ (1 ) $ 1,735 Net investment income 134 169 13 179 5 — 500 Other revenues 81 9 (1 ) — 3 — 92 Total operating revenues 904 881 219 316 8 (1 ) 2,327 Claims, Benefits and Expenses Net incurred claims and benefits 416 507 114 344 85 — 1,466 Policyholders’ dividends 1 2 — — — — 3 Amortization of deferred acquisition costs 146 117 45 6 — — 314 Other insurance related expenses 66 130 31 34 (1 ) (1 ) 259 Other expenses 69 5 (5 ) 5 47 — 121 Total claims, benefits and expenses 698 761 185 389 131 (1 ) 2,163 Operating income (loss) before income tax 206 120 34 (73 ) (123 ) — 164 Income tax (expense) benefit on operating income (loss) (69 ) (42 ) (12 ) 49 42 — (32 ) Net operating income (loss) 137 78 22 (24 ) (81 ) — 132 Net realized investment gains (losses) — 2 1 (5 ) 2 — — Income tax (expense) benefit on net realized investment gains (losses) — 2 (1 ) 6 (1 ) — 6 Net realized investment gains (losses), after tax — 4 — 1 1 — 6 Net income (loss) from continuing operations $ 137 $ 82 $ 22 $ (23 ) $ (80 ) $ — $ 138 Three months ended June 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 709 $ 732 $ 231 $ 139 $ — $ — $ 1,811 Net investment income 153 201 16 173 7 — 550 Other revenues 74 8 — 8 5 (2 ) 93 Total operating revenues 936 941 247 320 12 (2 ) 2,454 Claims, Benefits and Expenses Net incurred claims and benefits 404 610 118 304 1 — 1,437 Policyholders’ dividends 1 3 — — — — 4 Amortization of deferred acquisition costs 148 126 54 7 — — 335 Other insurance related expenses 67 125 36 31 — — 259 Other expenses 65 7 5 (3 ) (31 ) (2 ) 41 Total claims, benefits and expenses 685 871 213 339 (30 ) (2 ) 2,076 Operating income (loss) before income tax 251 70 34 (19 ) 42 — 378 Income tax (expense) benefit on operating income (loss) (84 ) (21 ) (14 ) 28 (15 ) — (106 ) Net operating income (loss) 167 49 20 9 27 — 272 Net realized investment gains (losses) (5 ) (5 ) (3 ) (4 ) 3 — (14 ) Income tax (expense) benefit on net realized investment gains (losses) 1 (2 ) 4 1 (1 ) — 3 Net realized investment gains (losses), after tax (4 ) (7 ) 1 (3 ) 2 — (11 ) Net income (loss) from continuing operations $ 163 $ 42 $ 21 $ 6 $ 29 $ — $ 261 Six months ended June 30, 2015 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 1,369 $ 1,381 $ 398 $ 275 $ — $ (1 ) $ 3,422 Net investment income 289 373 27 358 11 — 1,058 Other revenues 159 18 (1 ) 9 5 (1 ) 189 Total operating revenues 1,817 1,772 424 642 16 (2 ) 4,669 Claims, Benefits and Expenses Net incurred claims and benefits 845 961 230 684 81 — 2,801 Policyholders’ dividends 2 5 — — — — 7 Amortization of deferred acquisition costs 290 234 80 13 — — 617 Other insurance related expenses 135 257 68 69 (1 ) (1 ) 527 Other expenses 136 13 — 9 93 (1 ) 250 Total claims, benefits and expenses 1,408 1,470 378 775 173 (2 ) 4,202 Operating income (loss) before income tax 409 302 46 (133 ) (157 ) — 467 Income tax (expense) benefit on operating income (loss) (137 ) (104 ) (15 ) 92 54 — (110 ) Net operating income (loss) 272 198 31 (41 ) (103 ) — 357 Net realized investment gains (losses) 4 6 2 (4 ) 2 — 10 Income tax (expense) benefit on net realized investment gains (losses) (1 ) (1 ) (1 ) 8 (1 ) — 4 Net realized investment gains (losses), after tax 3 5 1 4 1 — 14 Net income (loss) from continuing operations $ 275 $ 203 $ 32 $ (37 ) $ (102 ) $ — $ 371 June 30, 2015 (In millions) Reinsurance receivables $ 697 $ 660 $ 192 $ 534 $ 2,619 $ — $ 4,702 Insurance receivables 862 1,068 302 10 3 — 2,245 Deferred acquisition costs 306 224 91 — — — 621 Goodwill 117 — 36 — — — 153 Insurance reserves Claim and claim adjustment expenses 6,365 9,391 1,401 3,248 2,788 — 23,193 Unearned premiums 1,794 1,384 506 132 — (1 ) 3,815 Future policy benefits — — — 9,360 — — 9,360 Six months ended June 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 1,401 $ 1,467 $ 472 $ 278 $ — $ (1 ) $ 3,617 Net investment income 297 392 31 344 12 — 1,076 Other revenues 142 18 — 13 7 (2 ) 178 Total operating revenues 1,840 1,877 503 635 19 (3 ) 4,871 Claims, Benefits and Expenses Net incurred claims and benefits 846 1,178 248 610 (2 ) — 2,880 Policyholders’ dividends 2 5 — — — — 7 Amortization of deferred acquisition costs 291 249 109 15 — — 664 Other insurance related expenses 132 251 76 63 — (1 ) 521 Other expenses 126 15 12 (2 ) 20 (2 ) 169 Total claims, benefits and expenses 1,397 1,698 445 686 18 (3 ) 4,241 Operating income (loss) before income tax 443 179 58 (51 ) 1 — 630 Income tax (expense) benefit on operating income (loss) (147 ) (56 ) (22 ) 58 (1 ) — (168 ) Net operating income (loss) 296 123 36 7 — — 462 Net realized investment gains (losses) 6 5 — 12 9 — 32 Income tax (expense) benefit on net realized investment gains (losses) (2 ) (4 ) 1 (5 ) (3 ) — (13 ) Net realized investment gains (losses), after tax 4 1 1 7 6 — 19 Net income (loss) from continuing operations $ 300 $ 124 $ 37 $ 14 $ 6 $ — $ 481 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Specialty Management & Professional Liability $ 674 $ 710 $ 1,371 $ 1,414 Surety 125 125 245 247 Warranty & Alternative Risks 105 96 205 185 Specialty revenues 904 931 1,821 1,846 Commercial Middle Market 412 412 821 815 Small Business 158 181 323 365 Other Commercial Insurance 313 343 634 702 Commercial revenues 883 936 1,778 1,882 International Canada 54 70 109 141 CNA Europe 77 83 154 171 Hardy 89 91 163 191 International revenues 220 244 426 503 Life & Group Non-Core revenues 311 316 638 647 Corporate & Other Non-Core revenues 10 15 18 28 Eliminations (1 ) (2 ) (2 ) (3 ) Total revenues $ 2,327 $ 2,440 $ 4,679 $ 4,903

Discontinued Operations

Discontinued Operations	6 Months Ended
	Jun. 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 June 30, 2014 (In millions) Three Months Six Months Revenues Net investment income $ 39 $ 80 Net realized investment gains 1 2 Total revenues 40 82 Claims, Benefits and Expenses Insurance claims and policyholders' benefits 32 63 Other operating expenses 1 2 Total claims, benefits and expenses 33 65 Income before income tax 7 17 Income tax expense (1 ) (4 ) Income from discontinued operations, net of income tax 6 13 Impairment loss on sale, net of income tax benefit of $- and $41 — (214 ) Income (loss) from discontinued operations $ 6 $ (201 )

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2015
Investments [Abstract]
Net investment income	The significant components of Net investment income are presented in the following table. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Fixed maturity securities $ 452 $ 451 $ 895 $ 903 Short term investments — — 2 1 Limited partnership investments 48 97 162 170 Equity securities 3 3 6 5 Mortgage loans 9 9 17 15 Trading portfolio 3 3 5 6 Other — 1 — 3 Gross investment income 515 564 1,087 1,103 Investment expense (15 ) (14 ) (29 ) (27 ) Net investment income $ 500 $ 550 $ 1,058 $ 1,076
Net realized investment gains (losses)	Net realized investment gains (losses) are presented in the following table. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Net realized investment gains (losses): Fixed maturity securities: Gross realized gains $ 36 $ 20 $ 69 $ 73 Gross realized losses (48 ) (39 ) (69 ) (54 ) Net realized investment gains (losses) on fixed maturity securities (12 ) (19 ) — 19 Equity securities: Gross realized gains — — 1 5 Gross realized losses (1 ) — (2 ) — Net realized investment gains (losses) on equity securities (1 ) — (1 ) 5 Derivative financial instruments 11 1 10 1 Short term investments and other 2 4 1 7 Net realized investment gains (losses) $ — $ (14 ) $ 10 $ 32
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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Fixed maturity securities available-for-sale: Corporate and other bonds $ 11 $ 2 $ 16 $ 3 States, municipalities and political subdivisions 13 — 18 — Asset-backed: Residential mortgage-backed 5 1 6 2 Other asset-backed 1 1 1 1 Total asset-backed 6 2 7 3 Total fixed maturity securities available-for-sale 30 4 41 6 Equity securities available-for-sale -- Common stock — 1 1 1 Short term investments 1 — 1 — Net OTTI losses recognized in earnings $ 31 $ 5 $ 43 $ 7
Summary of fixed maturity and equity securities	The following tables present a summary of fixed maturity and equity securities. June 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 $ 16,863 $ 1,337 $ 88 $ 18,112 $ — States, municipalities and political subdivisions 11,707 1,186 40 12,853 — Asset-backed: Residential mortgage-backed 4,940 175 15 5,100 (46 ) Commercial mortgage-backed 2,186 77 12 2,251 (2 ) Other asset-backed 1,044 12 1 1,055 — Total asset-backed 8,170 264 28 8,406 (48 ) U.S. Treasury and obligations of government-sponsored enterprises 24 5 — 29 — Foreign government 387 13 1 399 — Redeemable preferred stock 33 2 — 35 — Total fixed maturity securities available-for-sale 37,184 2,807 157 39,834 $ (48 ) Total fixed maturity securities trading 15 15 Equity securities available-for-sale: Common stock 54 8 2 60 Preferred stock 154 4 2 156 Total equity securities available-for-sale 208 12 4 216 Total $ 37,407 $ 2,819 $ 161 $ 40,065 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 June 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 $ 3,201 $ 73 $ 152 $ 15 $ 3,353 $ 88 States, municipalities and political subdivisions 1,523 34 143 6 1,666 40 Asset-backed: Residential mortgage-backed 451 6 167 9 618 15 Commercial mortgage-backed 557 9 61 3 618 12 Other asset-backed 135 1 18 — 153 1 Total asset-backed 1,143 16 246 12 1,389 28 U.S. Treasury and obligations of government-sponsored enterprises 3 — — — 3 — Foreign government 20 1 1 — 21 1 Total fixed maturity securities available-for-sale 5,890 124 542 33 6,432 157 Equity securities available-for-sale: Common Stock 21 2 — — 21 2 Preferred stock 17 2 — — 17 2 Total $ 5,928 $ 128 $ 542 $ 33 $ 6,470 $ 161 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 June 30, 2015 and 2014 for which a portion of an OTTI loss was recognized in Other comprehensive income. Periods ended June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Beginning balance of credit losses on fixed maturity securities $ 61 $ 69 $ 62 $ 74 Reductions for securities sold during the period (2 ) (3 ) (3 ) (5 ) 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 $ 59 $ 66 $ 59 $ 66
Contractual maturity	The following table presents available-for-sale fixed maturity securities by contractual maturity. June 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 $ 1,539 $ 1,559 $ 2,479 $ 2,511 Due after one year through five years 7,507 7,956 9,054 9,605 Due after five years through ten years 14,099 14,549 12,055 12,584 Due after ten years 14,039 15,770 13,728 16,049 Total $ 37,184 $ 39,834 $ 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. June 30, 2015 Contractual/ Notional Amount Estimated Fair Value (In millions) Asset Liability Without hedge designation Equity warrants $ 5 $ — $ — Embedded derivative on funds withheld liability 183 — (6 ) Total $ — $ (6 ) 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)	6 Months Ended
	Jun. 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. June 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 $ 17,958 $ 141 $ 18,127 States, municipalities and political subdivisions — 12,768 85 12,853 Asset-backed: Residential mortgage-backed — 4,893 207 5,100 Commercial mortgage-backed — 2,164 87 2,251 Other asset-backed — 565 490 1,055 Total asset-backed — 7,622 784 8,406 U.S. Treasury and obligations of government-sponsored enterprises 28 1 — 29 Foreign government 32 367 — 399 Redeemable preferred stock 24 11 — 35 Total fixed maturity securities 112 38,727 1,010 39,849 Equity securities 139 61 16 216 Other invested assets — 43 — 43 Short term investments 692 900 — 1,592 Life settlement contracts, included in Other assets — — 75 75 Total assets $ 943 $ 39,731 $ 1,101 $ 41,775 Liabilities Other liabilities $ — $ (6 ) $ — $ (6 ) Total liabilities $ — $ (6 ) $ — $ (6 ) 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 April 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 June 30, 2015 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2015 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 186 $ (2 ) $ (1 ) $ — $ — $ (7 ) $ — $ (35 ) $ 141 $ (3 ) States, municipalities and political subdivisions 86 — — — — (1 ) — — 85 — Asset-backed: Residential mortgage-backed 232 1 (2 ) — — (11 ) — (13 ) 207 — Commercial mortgage-backed 64 1 (1 ) 9 — (1 ) 17 (2 ) 87 — Other asset-backed 553 2 1 47 (90 ) (17 ) — (6 ) 490 — Total asset-backed 849 4 (2 ) 56 (90 ) (29 ) 17 (21 ) 784 — Total fixed maturity securities 1,121 2 (3 ) 56 (90 ) (37 ) 17 (56 ) 1,010 (3 ) Equity securities 13 — 3 — — — — — 16 — Life settlement contracts 79 4 — — — (8 ) — — 75 (2 ) Total $ 1,213 $ 6 $ — $ 56 $ (90 ) $ (45 ) $ 17 $ (56 ) $ 1,101 $ (5 ) Level 3 (In millions) Balance as of April 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 June 30, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 189 $ 1 $ — $ 21 $ (6 ) $ (5 ) $ 5 $ (11 ) $ 194 $ — States, municipalities and political subdivisions 86 1 1 1 (10 ) — — — 79 — Asset-backed: Residential mortgage-backed 359 (24 ) 47 22 (174 ) (19 ) — (26 ) 185 — Commercial mortgage-backed 126 1 1 — (60 ) (1 ) 12 (20 ) 59 — Other asset-backed 439 — 4 229 (28 ) (18 ) — — 626 (1 ) Total asset-backed 924 (23 ) 52 251 (262 ) (38 ) 12 (46 ) 870 (1 ) Total fixed maturity securities 1,199 (21 ) 53 273 (278 ) (43 ) 17 (57 ) 1,143 (1 ) Equity securities 2 — — — — — — — 2 — Life settlement contracts 87 12 — — — (13 ) — — 86 1 Total $ 1,288 $ (9 ) $ 53 $ 273 $ (278 ) $ (56 ) $ 17 $ (57 ) $ 1,231 $ — 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 June 30, 2015 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2015 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 162 $ (1 ) $ (1 ) $ 12 $ (12 ) $ (21 ) $ 37 $ (35 ) $ 141 $ (3 ) States, municipalities and political subdivisions 94 1 — — — (10 ) — — 85 — Asset-backed: Residential mortgage-backed 189 2 (2 ) 72 — (21 ) — (33 ) 207 — Commercial mortgage-backed 83 2 — 15 — (2 ) 17 (28 ) 87 — Other asset-backed 655 3 10 82 (234 ) (20 ) — (6 ) 490 — Total asset-backed 927 7 8 169 (234 ) (43 ) 17 (67 ) 784 — Total fixed maturity securities 1,183 7 7 181 (246 ) (74 ) 54 (102 ) 1,010 (3 ) Equity securities 16 — — — — — — — 16 — Life settlement contracts 82 17 — — — (24 ) — — 75 (1 ) Total $ 1,281 $ 24 $ 7 $ 181 $ (246 ) $ (98 ) $ 54 $ (102 ) $ 1,101 $ (4 ) 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 June 30, 2014 Unrealized gains (losses) on Level 3 assets and liabilities held as of June 30, 2014 recognized in Net income (loss) Fixed maturity securities: Corporate and other bonds $ 204 $ 2 $ 1 $ 26 $ (10 ) $ (10 ) $ 8 $ (27 ) $ 194 $ — States, municipalities and political subdivisions 71 1 2 1 (10 ) — 14 — 79 — Asset-backed: Residential mortgage-backed 331 (23 ) 62 47 (174 ) (40 ) 21 (39 ) 185 — Commercial mortgage-backed 151 2 — — (60 ) (2 ) 12 (44 ) 59 — Other asset-backed 446 1 4 377 (111 ) (90 ) — (1 ) 626 (1 ) Total asset-backed 928 (20 ) 66 424 (345 ) (132 ) 33 (84 ) 870 (1 ) Total fixed maturity securities 1,203 (17 ) 69 451 (365 ) (142 ) 55 (111 ) 1,143 (1 ) Equity securities 11 3 (4 ) — (8 ) — — — 2 — Life settlement contracts 88 22 — — — (24 ) — — 86 2 Separate account business 1 — — — — — — (1 ) — — Total $ 1,303 $ 8 $ 65 $ 451 $ (373 ) $ (166 ) $ 55 $ (112 ) $ 1,231 $ 1
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. June 30, 2015 Estimated Fair Value (In millions) Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Fixed maturity securities $ 97 Discounted cash flow Credit spread 2% - 13% (3%) Life settlement contracts 75 Discounted cash flow Discount rate risk premium 9% Mortality assumption 55% - 1676% (165%) 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. June 30, 2015 Carrying Amount Estimated Fair Value (In millions) Level 1 Level 2 Level 3 Total Assets Mortgage loans $ 622 $ — $ — $ 640 $ 640 Liabilities Long term debt $ 2,560 $ — $ 2,843 $ — $ 2,843 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)	6 Months Ended
	Jun. 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 June 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 $ (13 ) $ 16 $ (8 ) $ — $ (5 ) Pretax (favorable) unfavorable premium development (2 ) (11 ) (2 ) — (15 ) Total pretax (favorable) unfavorable net prior year development $ (15 ) $ 5 $ (10 ) $ — $ (20 ) Three months ended June 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 $ (41 ) $ 90 $ (25 ) $ — $ 24 Pretax (favorable) unfavorable premium development (2 ) (6 ) 6 — (2 ) Total pretax (favorable) unfavorable net prior year development $ (43 ) $ 84 $ (19 ) $ — $ 22 Six months ended June 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 $ (11 ) $ 11 $ (12 ) $ — $ (12 ) Pretax (favorable) unfavorable premium development (8 ) (12 ) 14 — (6 ) Total pretax (favorable) unfavorable net prior year development $ (19 ) $ (1 ) $ 2 $ — $ (18 ) Six months ended June 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 $ (44 ) $ 108 $ (15 ) $ — $ 49 Pretax (favorable) unfavorable premium development (8 ) (24 ) (1 ) — (33 ) Total pretax (favorable) unfavorable net prior year development $ (52 ) $ 84 $ (16 ) $ — $ 16
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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ (6 ) $ 1 $ 8 $ 1 Other Professional Liability and Management Liability (1 ) (44 ) (4 ) (50 ) Surety — — 1 1 Warranty 1 — 1 — Other (7 ) 2 (17 ) 4 Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (13 ) $ (41 ) $ (11 ) $ (44 )
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. The majority of the 2014 unfavorable development 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Commercial Auto $ 7 $ 19 $ 7 $ 39 General Liability 1 32 5 32 Workers' Compensation 24 39 23 50 Property and Other (16 ) — (24 ) (13 ) Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ 16 $ 90 $ 11 $ 108
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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development: Medical Professional Liability $ — $ — $ — $ 1 Other Professional Liability (5 ) (14 ) (5 ) (15 ) Liability (2 ) (4 ) (7 ) (6 ) Property & Marine (8 ) (7 ) (14 ) 1 Other 7 — 14 (6 ) Commutations — — — 10 Total pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development $ (8 ) $ (25 ) $ (12 ) $ (15 )
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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Net A&EP adverse development before consideration of LPT $ 150 $ — $ 150 $ — Provision for uncollectible third-party reinsurance on A&EP — — — — Additional amounts ceded under LPT 150 — 150 — Retroactive reinsurance benefit recognized (66 ) (1 ) (71 ) (5 ) Pretax impact of unrecognized deferred retroactive reinsurance benefit $ 84 $ (1 ) $ 79 $ (5 )

Benefit Plans (Tables)

Benefit Plans (Tables)	6 Months Ended
	Jun. 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Pension cost (benefit) Service cost $ 2 $ 1 $ 4 $ 4 Interest cost on projected benefit obligation 28 33 56 66 Expected return on plan assets (44 ) (48 ) (87 ) (96 ) Amortization of net actuarial loss 10 7 19 13 Net periodic pension cost (benefit) $ (4 ) $ (7 ) $ (8 ) $ (13 ) Postretirement cost (benefit) Interest cost on projected benefit obligation $ — $ 1 $ — $ 1 Amortization of prior service credit (1 ) (5 ) (1 ) (9 ) Amortization of net actuarial loss 1 — 1 — Curtailment gain — (86 ) — (86 ) Net periodic postretirement cost (benefit) $ — $ (90 ) $ — $ (94 )

Accumulated Other Comprehensi24

Accumulated Other Comprehensive Income (Loss) by Component (Tables)	6 Months Ended
	Jun. 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 April 1, 2015 $ 35 $ 1,054 $ (627 ) $ (41 ) $ 421 Other comprehensive income (loss) before reclassifications (4 ) (372 ) 36 49 (291 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $5, $4, $- and $9 — (7 ) (6 ) — (13 ) Other comprehensive income (loss) after tax (expense) benefit of $2, $181, $(23), $- and $160 (4 ) (365 ) 42 49 (278 ) Balance as of June 30, 2015 $ 31 $ 689 $ (585 ) $ 8 $ 143 (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 April 1, 2014 $ 33 $ 912 $ 30 $ (425 ) $ 142 $ 692 Other comprehensive income (loss) before reclassifications 2 257 7 — 42 308 Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $6, $-, $(28), $- and $(22) — (13 ) — 51 — 38 Other comprehensive income (loss) after tax (expense) benefit of $(1), $(146), $(5), $28, $- and $(124) 2 270 7 (51 ) 42 270 Balance as of June 30, 2014 $ 35 $ 1,182 $ 37 $ (476 ) $ 184 $ 962 (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 (5 ) (251 ) 36 (47 ) (267 ) Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $5, $7, $- and $12 — 2 (12 ) — (10 ) Other comprehensive income (loss) after tax (expense) benefit of $2, $119, $(26), $- and $95 (5 ) (253 ) 48 (47 ) (257 ) Balance as of June 30, 2015 $ 31 $ 689 $ (585 ) $ 8 $ 143 (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 14 521 15 — 34 584 Amounts reclassified from Accumulated other comprehensive income (loss) after tax (expense) benefit of $-, $(8), $-, $(27), $- and $(35) — 14 — 50 — 64 Other comprehensive income (loss) after tax (expense) benefit of $(7), $(273), $(10), $27, $- and $(263) 14 507 15 (50 ) 34 520 Balance as of June 30, 2014 $ 35 $ 1,182 $ 37 $ (476 ) $ 184 $ 962

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 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 June 30, 2015 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 689 $ 703 $ 207 $ 137 $ — $ (1 ) $ 1,735 Net investment income 134 169 13 179 5 — 500 Other revenues 81 9 (1 ) — 3 — 92 Total operating revenues 904 881 219 316 8 (1 ) 2,327 Claims, Benefits and Expenses Net incurred claims and benefits 416 507 114 344 85 — 1,466 Policyholders’ dividends 1 2 — — — — 3 Amortization of deferred acquisition costs 146 117 45 6 — — 314 Other insurance related expenses 66 130 31 34 (1 ) (1 ) 259 Other expenses 69 5 (5 ) 5 47 — 121 Total claims, benefits and expenses 698 761 185 389 131 (1 ) 2,163 Operating income (loss) before income tax 206 120 34 (73 ) (123 ) — 164 Income tax (expense) benefit on operating income (loss) (69 ) (42 ) (12 ) 49 42 — (32 ) Net operating income (loss) 137 78 22 (24 ) (81 ) — 132 Net realized investment gains (losses) — 2 1 (5 ) 2 — — Income tax (expense) benefit on net realized investment gains (losses) — 2 (1 ) 6 (1 ) — 6 Net realized investment gains (losses), after tax — 4 — 1 1 — 6 Net income (loss) from continuing operations $ 137 $ 82 $ 22 $ (23 ) $ (80 ) $ — $ 138 Three months ended June 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 709 $ 732 $ 231 $ 139 $ — $ — $ 1,811 Net investment income 153 201 16 173 7 — 550 Other revenues 74 8 — 8 5 (2 ) 93 Total operating revenues 936 941 247 320 12 (2 ) 2,454 Claims, Benefits and Expenses Net incurred claims and benefits 404 610 118 304 1 — 1,437 Policyholders’ dividends 1 3 — — — — 4 Amortization of deferred acquisition costs 148 126 54 7 — — 335 Other insurance related expenses 67 125 36 31 — — 259 Other expenses 65 7 5 (3 ) (31 ) (2 ) 41 Total claims, benefits and expenses 685 871 213 339 (30 ) (2 ) 2,076 Operating income (loss) before income tax 251 70 34 (19 ) 42 — 378 Income tax (expense) benefit on operating income (loss) (84 ) (21 ) (14 ) 28 (15 ) — (106 ) Net operating income (loss) 167 49 20 9 27 — 272 Net realized investment gains (losses) (5 ) (5 ) (3 ) (4 ) 3 — (14 ) Income tax (expense) benefit on net realized investment gains (losses) 1 (2 ) 4 1 (1 ) — 3 Net realized investment gains (losses), after tax (4 ) (7 ) 1 (3 ) 2 — (11 ) Net income (loss) from continuing operations $ 163 $ 42 $ 21 $ 6 $ 29 $ — $ 261 Six months ended June 30, 2015 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 1,369 $ 1,381 $ 398 $ 275 $ — $ (1 ) $ 3,422 Net investment income 289 373 27 358 11 — 1,058 Other revenues 159 18 (1 ) 9 5 (1 ) 189 Total operating revenues 1,817 1,772 424 642 16 (2 ) 4,669 Claims, Benefits and Expenses Net incurred claims and benefits 845 961 230 684 81 — 2,801 Policyholders’ dividends 2 5 — — — — 7 Amortization of deferred acquisition costs 290 234 80 13 — — 617 Other insurance related expenses 135 257 68 69 (1 ) (1 ) 527 Other expenses 136 13 — 9 93 (1 ) 250 Total claims, benefits and expenses 1,408 1,470 378 775 173 (2 ) 4,202 Operating income (loss) before income tax 409 302 46 (133 ) (157 ) — 467 Income tax (expense) benefit on operating income (loss) (137 ) (104 ) (15 ) 92 54 — (110 ) Net operating income (loss) 272 198 31 (41 ) (103 ) — 357 Net realized investment gains (losses) 4 6 2 (4 ) 2 — 10 Income tax (expense) benefit on net realized investment gains (losses) (1 ) (1 ) (1 ) 8 (1 ) — 4 Net realized investment gains (losses), after tax 3 5 1 4 1 — 14 Net income (loss) from continuing operations $ 275 $ 203 $ 32 $ (37 ) $ (102 ) $ — $ 371 June 30, 2015 (In millions) Reinsurance receivables $ 697 $ 660 $ 192 $ 534 $ 2,619 $ — $ 4,702 Insurance receivables 862 1,068 302 10 3 — 2,245 Deferred acquisition costs 306 224 91 — — — 621 Goodwill 117 — 36 — — — 153 Insurance reserves Claim and claim adjustment expenses 6,365 9,391 1,401 3,248 2,788 — 23,193 Unearned premiums 1,794 1,384 506 132 — (1 ) 3,815 Future policy benefits — — — 9,360 — — 9,360 Six months ended June 30, 2014 Specialty Commercial International Life & Group Non-Core Corporate & Other Non-Core (In millions) Eliminations Total Operating revenues Net earned premiums $ 1,401 $ 1,467 $ 472 $ 278 $ — $ (1 ) $ 3,617 Net investment income 297 392 31 344 12 — 1,076 Other revenues 142 18 — 13 7 (2 ) 178 Total operating revenues 1,840 1,877 503 635 19 (3 ) 4,871 Claims, Benefits and Expenses Net incurred claims and benefits 846 1,178 248 610 (2 ) — 2,880 Policyholders’ dividends 2 5 — — — — 7 Amortization of deferred acquisition costs 291 249 109 15 — — 664 Other insurance related expenses 132 251 76 63 — (1 ) 521 Other expenses 126 15 12 (2 ) 20 (2 ) 169 Total claims, benefits and expenses 1,397 1,698 445 686 18 (3 ) 4,241 Operating income (loss) before income tax 443 179 58 (51 ) 1 — 630 Income tax (expense) benefit on operating income (loss) (147 ) (56 ) (22 ) 58 (1 ) — (168 ) Net operating income (loss) 296 123 36 7 — — 462 Net realized investment gains (losses) 6 5 — 12 9 — 32 Income tax (expense) benefit on net realized investment gains (losses) (2 ) (4 ) 1 (5 ) (3 ) — (13 ) Net realized investment gains (losses), after tax 4 1 1 7 6 — 19 Net income (loss) from continuing operations $ 300 $ 124 $ 37 $ 14 $ 6 $ — $ 481 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 June 30 Three Months Six Months (In millions) 2015 2014 2015 2014 Specialty Management & Professional Liability $ 674 $ 710 $ 1,371 $ 1,414 Surety 125 125 245 247 Warranty & Alternative Risks 105 96 205 185 Specialty revenues 904 931 1,821 1,846 Commercial Middle Market 412 412 821 815 Small Business 158 181 323 365 Other Commercial Insurance 313 343 634 702 Commercial revenues 883 936 1,778 1,882 International Canada 54 70 109 141 CNA Europe 77 83 154 171 Hardy 89 91 163 191 International revenues 220 244 426 503 Life & Group Non-Core revenues 311 316 638 647 Corporate & Other Non-Core revenues 10 15 18 28 Eliminations (1 ) (2 ) (2 ) (3 ) Total revenues $ 2,327 $ 2,440 $ 4,679 $ 4,903

Discontinued Operations (Tables

Discontinued Operations (Tables)	6 Months Ended
	Jun. 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 June 30, 2014 (In millions) Three Months Six Months Revenues Net investment income $ 39 $ 80 Net realized investment gains 1 2 Total revenues 40 82 Claims, Benefits and Expenses Insurance claims and policyholders' benefits 32 63 Other operating expenses 1 2 Total claims, benefits and expenses 33 65 Income before income tax 7 17 Income tax expense (1 ) (4 ) Income from discontinued operations, net of income tax 6 13 Impairment loss on sale, net of income tax benefit of $- and $41 — (214 ) Income (loss) from discontinued operations $ 6 $ (201 )

General General (Details)

General General (Details) - Jun. 30, 2014 - USD ($) $ in Millions	Total	Total
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax	$ 0	$ 214

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	238	180	208	110
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	423	622	543	644

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Reduction of net unrealized gains on investments included in AOCI due to shadow adjustments	$ 1,022	$ 1,288
Future capital call commitments for limited partnership investments	295
Mortgage loan commitments	6
Commitments to purchase or fund privately placed debt securities	134
Commitments to sell various privately placed debt securities	$ 79

Investments (Net investment inc

Investments (Net investment income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Investment Income [Line Items]
Gross investment income	$ 515	$ 564	$ 1,087	$ 1,103
Investment expense	(15)	(14)	(29)	(27)
Net investment income	500	550	1,058	1,076
Fixed maturity securities [Member]
Net Investment Income [Line Items]
Gross investment income	452	451	895	903
Short term investments [Member]
Net Investment Income [Line Items]
Gross investment income	0	0	2	1
Limited partnership investments [Member]
Net Investment Income [Line Items]
Gross investment income	48	97	162	170
Equity securities [Member]
Net Investment Income [Line Items]
Gross investment income	3	3	6	5
Mortgage loans [Member]
Net Investment Income [Line Items]
Gross investment income	9	9	17	15
Trading portfolio [Member]
Net Investment Income [Line Items]
Gross investment income	3	3	5	6
Other [Member]
Net Investment Income [Line Items]
Gross investment income	$ 0	$ 1	$ 0	$ 3

Investments (Net realized inves

Investments (Net realized investment gains (losses)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net realized investment gains (losses)	$ 0	$ (14)	$ 10	$ 32
Fixed maturity securities [Member]
Gross realized gains	36	20	69	73
Gross realized losses	(48)	(39)	(69)	(54)
Net realized investment gains (losses)	(12)	(19)	0	19
Equity securities [Member]
Gross realized gains	0	0	1	5
Gross realized losses	(1)	0	(2)	0
Net realized investment gains (losses)	(1)	0	(1)	5
Derivative [Member]
Net realized investment gains (losses)	11	1	10	1
Short term investments and other [Member]
Net realized investment gains (losses)	$ 2	$ 4	$ 1	$ 7

Investments (Components of othe

Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other-than-temporary impairment losses recognized in earnings	$ 31	$ 5	$ 43	$ 7
Corporate and other bonds [Member]
Other-than-temporary impairment losses recognized in earnings	11	2	16	3
States, municipalities and political subdivisions [Member]
Other-than-temporary impairment losses recognized in earnings	13	0	18	0
Residential mortgage-backed [Member]
Other-than-temporary impairment losses recognized in earnings	5	1	6	2
Other asset-backed [Member]
Other-than-temporary impairment losses recognized in earnings	1	1	1	1
Total asset-backed [Member]
Other-than-temporary impairment losses recognized in earnings	6	2	7	3
Total fixed maturity securities available-for-sale [Member]
Other-than-temporary impairment losses recognized in earnings	30	4	41	6
Common Stock [Member]
Other-than-temporary impairment losses recognized in earnings	0	1	1	1
Short term investments [Member]
Other-than-temporary impairment losses recognized in earnings	$ 1	$ 0	$ 1	$ 0

Investments (Summary of fixed m

Investments (Summary of fixed maturity and equity securities) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Cost or Amortized Cost	$ 37,407	$ 37,545
Gross Unrealized Gain	2,819	3,544
Gross Unrealized Loss	161	99
Estimated fair value	40,065	40,990
Corporate and other bonds [Member]
Cost or Amortized Cost	16,863	17,210
Gross Unrealized Gain	1,337	1,721
Gross Unrealized Loss	88	61
Estimated fair value	18,112	18,870
Unrealized OTTI Losses (Gains)	0	0
States, municipalities and political subdivisions [Member]
Cost or Amortized Cost	11,707	11,285
Gross Unrealized Gain	1,186	1,463
Gross Unrealized Loss	40	8
Estimated fair value	12,853	12,740
Unrealized OTTI Losses (Gains)	0	0
Residential mortgage-backed [Member]
Cost or Amortized Cost	4,940	5,028
Gross Unrealized Gain	175	218
Gross Unrealized Loss	15	13
Estimated fair value	5,100	5,233
Unrealized OTTI Losses (Gains)	(46)	(53)
Commercial mortgage-backed [Member]
Cost or Amortized Cost	2,186	2,056
Gross Unrealized Gain	77	93
Gross Unrealized Loss	12	5
Estimated fair value	2,251	2,144
Unrealized OTTI Losses (Gains)	(2)	(2)
Other asset-backed [Member]
Cost or Amortized Cost	1,044	1,234
Gross Unrealized Gain	12	11
Gross Unrealized Loss	1	10
Estimated fair value	1,055	1,235
Unrealized OTTI Losses (Gains)	0	0
Total asset-backed [Member]
Cost or Amortized Cost	8,170	8,318
Gross Unrealized Gain	264	322
Gross Unrealized Loss	28	28
Estimated fair value	8,406	8,612
Unrealized OTTI Losses (Gains)	(48)	(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	387	438
Gross Unrealized Gain	13	16
Gross Unrealized Loss	1	0
Estimated fair value	399	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	37,184	37,316
Gross Unrealized Gain	2,807	3,530
Gross Unrealized Loss	157	97
Estimated fair value	39,834	40,749
Unrealized OTTI Losses (Gains)	(48)	(55)
Total fixed maturity securities trading [Member]
Cost or Amortized Cost, Trading Securities	15	19
Estimated Fair Value, Trading Securities	15	19
Common Stock [Member]
Cost or Amortized Cost	54	38
Gross Unrealized Gain	8	9
Gross Unrealized Loss	2	0
Estimated fair value	60	47
Preferred stock [Member]
Cost or Amortized Cost	154	172
Gross Unrealized Gain	4	5
Gross Unrealized Loss	2	2
Estimated fair value	156	175
Total equity securities available-for-sale [Member]
Cost or Amortized Cost	208	210
Gross Unrealized Gain	12	14
Gross Unrealized Loss	4	2
Estimated fair value	$ 216	$ 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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance of credit losses on fixed maturity securities	$ 61	$ 69	$ 62	$ 74
Reductions for securities sold during the period	(2)	(3)	(3)	(5)
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	$ 59	$ 66	$ 59	$ 66

Investments (Securities in a gr

Investments (Securities in a gross unrealized loss position) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 5,928	$ 2,855
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	128	70
Estimated Fair Value, 12 Months or Longer	542	707
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	33	29
Estimated Fair Value, Total	6,470	3,562
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	161	99
Corporate and other bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	3,201	1,330
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	73	46
Estimated Fair Value, 12 Months or Longer	152	277
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	15	15
Estimated Fair Value, Total	3,353	1,607
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	88	61
States, municipalities and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	1,523	335
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	34	5
Estimated Fair Value, 12 Months or Longer	143	127
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	6	3
Estimated Fair Value, Total	1,666	462
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	40	8
Residential mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	451	293
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	6	5
Estimated Fair Value, 12 Months or Longer	167	189
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	9	8
Estimated Fair Value, Total	618	482
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	15	13
Commercial mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	557	264
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	9	2
Estimated Fair Value, 12 Months or Longer	61	99
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3	3
Estimated Fair Value, Total	618	363
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	12	5
Other asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	135	607
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	10
Estimated Fair Value, 12 Months or Longer	18	7
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	153	614
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	10
Total asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	1,143	1,164
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	16	17
Estimated Fair Value, 12 Months or Longer	246	295
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	12	11
Estimated Fair Value, Total	1,389	1,459
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	28	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	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	4
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	3	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	20	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	0
Estimated Fair Value, 12 Months or Longer	1	3
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Estimated Fair Value, Total	21	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
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0
Estimated Fair Value, 12 Months or Longer		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Estimated Fair Value, Total		3
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		0
Total fixed maturity securities available-for-sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	5,890	2,838
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	124	68
Estimated Fair Value, 12 Months or Longer	542	706
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	33	29
Estimated Fair Value, Total	6,432	3,544
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	157	97
Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	21
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2
Estimated Fair Value, 12 Months or Longer	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Estimated Fair Value, Total	21
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2
Preferred stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	17	17
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2	2
Estimated Fair Value, 12 Months or Longer	0	1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	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	Jun. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Due in one year or less, cost or amortized cost	$ 1,539	$ 2,479
Due after one year through five years, cost or amortized cost	7,507	9,054
Due after five years through ten years, cost or amortized cost	14,099	12,055
Due after ten years, cost or amortized cost	14,039	13,728
Total Amortized Cost Basis	37,184	37,316
Due in one year or less, estimated fair value	1,559	2,511
Due after one year through five years, estimated fair value	7,956	9,605
Due after five years through ten years, estimated fair value	14,549	12,584
Due after ten years, estimated fair value	15,770	16,049
Total Estimated Fair Value	$ 39,834	$ 40,749

Investments Derivative Financia

Investments Derivative Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Estimated fair value asset	$ 0	$ 0
Estimated fair value liability	(6)	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	183	184
Estimated fair value asset	0	0
Estimated fair value liability	$ (6)	$ 3

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 2 to Level 1, Transfers	$ 0	$ 1	$ 0	$ 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	Jun. 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	$ 41,775	$ 42,757
Fair value of liabilities, measured on a recurring basis	(6)	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	18,127	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	12,853	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	5,100	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	1,055	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	8,406	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	399	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	39,849	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	216	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	43	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	1,592	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	75	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	(6)	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	943	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	32	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	112	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	139	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	692	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	39,731	40,519
Fair value of liabilities, measured on a recurring basis	(6)	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	17,958	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	12,768	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	4,893	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	2,164	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	565	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	7,622	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	367	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	38,727	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	61	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	43	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	900	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	(6)	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	1,101	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	141	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	85	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	207	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	87	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	490	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	784	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	1,010	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	16	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	75	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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	$ 1,213	$ 1,288	$ 1,281	$ 1,303
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	6	(9)	24	8
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	53	7	65
Purchases	56	273	181	451
Sales	(90)	(278)	(246)	(373)
Settlements	(45)	(56)	(98)	(166)
Transfers into Level 3	17	17	54	55
Transfers out of Level 3	(56)	(57)	(102)	(112)
Balance, Ending, Assets	1,101	1,231	1,101	1,231
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(5)	0	(4)	1
Corporate and other bonds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	186	189	162	204
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	(2)	1	(1)	2
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(1)	0	(1)	1
Purchases	0	21	12	26
Sales	0	(6)	(12)	(10)
Settlements	(7)	(5)	(21)	(10)
Transfers into Level 3	0	5	37	8
Transfers out of Level 3	(35)	(11)	(35)	(27)
Balance, Ending, Assets	141	194	141	194
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(3)	0	(3)	0
States, municipalities and political subdivisions [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	86	86	94	71
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	0	1	1	1
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	1	0	2
Purchases	0	1	0	1
Sales	0	(10)	0	(10)
Settlements	(1)	0	(10)	0
Transfers into Level 3	0	0	0	14
Transfers out of Level 3	0	0	0	0
Balance, Ending, Assets	85	79	85	79
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	232	359	189	331
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	1	(24)	2	(23)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(2)	47	(2)	62
Purchases	0	22	72	47
Sales	0	(174)	0	(174)
Settlements	(11)	(19)	(21)	(40)
Transfers into Level 3	0	0	0	21
Transfers out of Level 3	(13)	(26)	(33)	(39)
Balance, Ending, Assets	207	185	207	185
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	64	126	83	151
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	1	1	2	2
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(1)	1	0	0
Purchases	9	0	15	0
Sales	0	(60)	0	(60)
Settlements	(1)	(1)	(2)	(2)
Transfers into Level 3	17	12	17	12
Transfers out of Level 3	(2)	(20)	(28)	(44)
Balance, Ending, Assets	87	59	87	59
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	553	439	655	446
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	2	0	3	1
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	1	4	10	4
Purchases	47	229	82	377
Sales	(90)	(28)	(234)	(111)
Settlements	(17)	(18)	(20)	(90)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(6)	0	(6)	(1)
Balance, Ending, Assets	490	626	490	626
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	(1)	0	(1)
Total asset-backed [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	849	924	927	928
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	4	(23)	7	(20)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(2)	52	8	66
Purchases	56	251	169	424
Sales	(90)	(262)	(234)	(345)
Settlements	(29)	(38)	(43)	(132)
Transfers into Level 3	17	12	17	33
Transfers out of Level 3	(21)	(46)	(67)	(84)
Balance, Ending, Assets	784	870	784	870
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	(1)	0	(1)
Fixed maturity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	1,121	1,199	1,183	1,203
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	2	(21)	7	(17)
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	(3)	53	7	69
Purchases	56	273	181	451
Sales	(90)	(278)	(246)	(365)
Settlements	(37)	(43)	(74)	(142)
Transfers into Level 3	17	17	54	55
Transfers out of Level 3	(56)	(57)	(102)	(111)
Balance, Ending, Assets	1,010	1,143	1,010	1,143
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(3)	(1)	(3)	(1)
Equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning, Assets	13	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)	3	0	0	(4)
Purchases	0	0	0	0
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	16	2	16	2
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	79	87	82	88
Net realized investment gains (losses) and net change in unrealized appreciation (depreciation) included in net income (loss)	4	12	17	22
Net change in unrealized appreciation (depreciation) included in other comprehensive income (loss)	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	(8)	(13)	(24)	(24)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, Ending, Assets	75	86	75	86
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ (2)	1	$ (1)	2
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	Jun. 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	$ 97	$ 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	13.00%	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	$ 75	$ 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	165.00%	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	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable for the issuance of common stock	$ 0	$ 1	$ 1	$ 23
Financial Assets [Abstract]
Mortgage loans	622	588
Financial Liabilities [Abstract]
Long term debt	2,560	2,559
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable for the issuance of common stock		1
Financial Assets [Abstract]
Mortgage loans	622	588
Financial Liabilities [Abstract]
Long term debt	2,560	2,559
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable for the issuance of common stock		1
Financial Assets [Abstract]
Mortgage loans	640	608
Financial Liabilities [Abstract]
Long term debt	2,843	2,883
Level 1 [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable for the issuance of common stock		0
Financial Assets [Abstract]
Mortgage loans	0	0
Financial Liabilities [Abstract]
Long term debt	0	0
Level 2 [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable for the issuance of common stock		0
Financial Assets [Abstract]
Mortgage loans	0	0
Financial Liabilities [Abstract]
Long term debt	2,843	2,883
Level 3 [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable for the issuance of common stock		1
Financial Assets [Abstract]
Mortgage loans	640	608
Financial Liabilities [Abstract]
Long term debt	$ 0	$ 0

Claim and Claim Adjustment Ex43

Claim and Claim Adjustment Expense Reserves (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		48 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2010
Catastrophe losses net of reinsurance	$ 60	$ 56	$ 89	$ 130
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(5)	24	(12)	49
Specialty [Member]
Favorable development in other professional liability and management liability related to lower than expected severity for professional services primarily in accident years 2010 and prior	38		41
Unfavorable development in other professional services related to increased claim frequency on public company management liability in accident years 2012 through 2014	37		37
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(13)	(41)	(11)	(44)
Commercial [Member]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	16	90	11	108
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	150	$ 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	255		255			176
Fair value of collateral trust account established by NICO under A&EP Loss Portfolio Transfer	$ 3,100		$ 3,100			$ 3,400

Claim and Claim Adjustment Ex44

Claim and Claim Adjustment Expense Reserves (Net prior year development) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (5)	$ 24	$ (12)	$ 49
Pretax (favorable) unfavorable premium development, excluding Life & Group	(15)	(2)	(6)	(33)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(20)	22	(18)	16
Specialty [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(13)	(41)	(11)	(44)
Pretax (favorable) unfavorable premium development, excluding Life & Group	(2)	(2)	(8)	(8)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(15)	(43)	(19)	(52)
Commercial [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	16	90	11	108
Pretax (favorable) unfavorable premium development, excluding Life & Group	(11)	(6)	(12)	(24)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	5	84	(1)	84
International [Member]
Segment Reporting Information [Line Items]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(8)	(25)	(12)	(15)
Pretax (favorable) unfavorable premium development, excluding Life & Group	(2)	6	14	(1)
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	(10)	(19)	2	(16)
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	0	0	0
Pretax (favorable) unfavorable premium development, excluding Life & Group	0	0	0	0
Total pretax (favorable) unfavorable net prior year development, excluding Life & Group	$ 0	$ 0	$ 0	$ 0

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (5)	$ 24	$ (12)	$ 49
Specialty [Member]
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	(13)	(41)	(11)	(44)
Medical Professional Liability	(6)	1	8	1
Other Professional Liability and Management Liability	(1)	(44)	(4)	(50)
Surety	0	0	1	1
Warranty	1	0	1	0
Other	$ (7)	$ 2	$ (17)	$ 4

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (5)	$ 24	$ (12)	$ 49
Commercial [Member]
Commercial Auto	7	19	7	39
General Liability	1	32	5	32
Workers' Compensation	24	39	23	50
Property and Other	(16)	0	(24)	(13)
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ 16	$ 90	$ 11	$ 108

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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (5)	$ 24	$ (12)	$ 49
International [Member]
Medical Professional Liability	0	0	0	1
Other Professional Liability	(5)	(14)	(5)	(15)
Liability	(2)	(4)	(7)	(6)
Property & Marine	(8)	(7)	(14)	1
Other	7	0	14	(6)
Commutations	0	0	0	10
Pretax (favorable) unfavorable net prior year claim and allocated claim adjustment expense reserve development, excluding Life & Group	$ (8)	$ (25)	$ (12)	$ (15)

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		6 Months Ended		48 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013
Net AEP adverse development before consideration of LPT	$ 150	$ 0	$ 150	$ 0	$ 900
Provision for uncollectible third-party reinsurance on AEP	0	0	0	0
Additional amounts ceded under LPT	150	0	150	0
Retroactive reinsurance benefit recognized	(66)	(1)	(71)	(5)
Pretax impact of unrecognized deferred retroactive reinsurance benefit	$ 84	$ (1)	$ 79	$ (5)

Benefit Plans (Components of ne

Benefit Plans (Components of net periodic cost (benefit)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain				$ (86)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 1	$ 4	4
Interest cost on projected benefit obligation	28	33	56	66
Expected return on plan assets	(44)	(48)	(87)	(96)
Amortization of net actuarial (gain) loss	10	7	19	13
Net periodic (benefit) cost	(4)	(7)	(8)	(13)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	0	1	0	1
Amortization of net actuarial (gain) loss	1	0	1	0
Amortization of prior service credit	(1)	(5)	(1)	(9)
Curtailment gain	0	(86)	0	(86)
Net periodic (benefit) cost	$ 0	$ (90)	$ 0	$ (94)

Benefit Plans (Narrative) (Deta

Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 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	Jun. 30, 2015	Dec. 31, 2014
Property Lease Guarantee [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 37
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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ 421	$ 692	$ 400	$ 442
Transfer to net assets held for sale				0
Other comprehensive income (loss), before reclassifications	(291)	308	(267)	584
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(13)	38	(10)	64
Other comprehensive income (loss) after tax (expense) benefit	(278)	270	(257)	520
Accumulated other comprehensive income (loss), ending balance	143	962	143	962
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	9	(22)	12	(35)
Tax (expense) benefit on other comprehensive income (loss)	160	(124)	95	(263)
Net unrealized gains (losses) on investments with OTTI losses [Member)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	35	33	36	26
Transfer to net assets held for sale				(5)
Other comprehensive income (loss), before reclassifications	(4)	2	(5)	14
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	0	0	0	0
Other comprehensive income (loss) after tax (expense) benefit	(4)	2	(5)	14
Accumulated other comprehensive income (loss), ending balance	31	35	31	35
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Tax (expense) benefit on other comprehensive income (loss)	2	(1)	2	(7)
Net unrealized gains (losses) on other investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	1,054	912	942	692
Transfer to net assets held for sale				(17)
Other comprehensive income (loss), before reclassifications	(372)	257	(251)	521
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(7)	(13)	2	14
Other comprehensive income (loss) after tax (expense) benefit	(365)	270	(253)	507
Accumulated other comprehensive income (loss), ending balance	689	1,182	689	1,182
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	5	6	5	(8)
Tax (expense) benefit on other comprehensive income (loss)	181	(146)	119	(273)
Accumulated Net Unrealized Gains Losses on discontinued operations [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance		30		0
Transfer to net assets held for sale				22
Other comprehensive income (loss), before reclassifications		7		15
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit		0		0
Other comprehensive income (loss) after tax (expense) benefit		7		15
Accumulated other comprehensive income (loss), ending balance		37		37
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)		0		0
Tax (expense) benefit on other comprehensive income (loss)		(5)		(10)
Pension and postretirement benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(627)	(425)	(633)	(426)
Transfer to net assets held for sale				0
Other comprehensive income (loss), before reclassifications	36	0	36	0
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	(6)	51	(12)	50
Other comprehensive income (loss) after tax (expense) benefit	42	(51)	48	(50)
Accumulated other comprehensive income (loss), ending balance	(585)	(476)	(585)	(476)
Tax (expense) benefit on amounts reclassified from accumulated other comprehensive income (loss)	4	(28)	7	(27)
Tax (expense) benefit on other comprehensive income (loss)	(23)	28	(26)	27
Cumulative foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(41)	142	55	150
Transfer to net assets held for sale				0
Other comprehensive income (loss), before reclassifications	49	42	(47)	34
Amounts reclassified from accumulated other comprehensive income (loss) after tax (expense) benefit	0	0	0	0
Other comprehensive income (loss) after tax (expense) benefit	49	42	(47)	34
Accumulated other comprehensive income (loss), ending balance	8	184	8	184
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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Revenues
Net earned premiums	$ 1,735	$ 1,811	$ 3,422	$ 3,617
Net investment income	500	550	1,058	1,076
Other revenues	92	93	189	178
Total operating revenues	2,327	2,454	4,669	4,871
Claims, Benefits and Expenses
Net incurred claims and benefits	1,466	1,437	2,801	2,880
Policyholders' dividends	3	4	7	7
Amortization of deferred acquisition costs	314	335	617	664
Other insurance related expenses	259	259	527	521
Other expenses	121	41	250	169
Total claims, benefits and expenses	2,163	2,076	4,202	4,241
Operating income (loss) before income tax	164	378	467	630
Income tax (expense) benefit on operating income (loss)	(32)	(106)	(110)	(168)
Net operating income (loss)	132	272	357	462
Net realized investment gains (losses), pre-tax	0	(14)	10	32
Income tax (expense) benefit on net realized investment gains (losses)	6	3	4	(13)
Net realized investment gains (losses), after tax	6	(11)	14	19
Net income (loss) from continuing operations	138	261	371	481
Specialty [Member]
Operating Revenues
Net earned premiums	689	709	1,369	1,401
Net investment income	134	153	289	297
Other revenues	81	74	159	142
Total operating revenues	904	936	1,817	1,840
Claims, Benefits and Expenses
Net incurred claims and benefits	416	404	845	846
Policyholders' dividends	1	1	2	2
Amortization of deferred acquisition costs	146	148	290	291
Other insurance related expenses	66	67	135	132
Other expenses	69	65	136	126
Total claims, benefits and expenses	698	685	1,408	1,397
Operating income (loss) before income tax	206	251	409	443
Income tax (expense) benefit on operating income (loss)	(69)	(84)	(137)	(147)
Net operating income (loss)	137	167	272	296
Net realized investment gains (losses), pre-tax	0	(5)	4	6
Income tax (expense) benefit on net realized investment gains (losses)	0	1	(1)	(2)
Net realized investment gains (losses), after tax	0	(4)	3	4
Net income (loss) from continuing operations	137	163	275	300
Commercial [Member]
Operating Revenues
Net earned premiums	703	732	1,381	1,467
Net investment income	169	201	373	392
Other revenues	9	8	18	18
Total operating revenues	881	941	1,772	1,877
Claims, Benefits and Expenses
Net incurred claims and benefits	507	610	961	1,178
Policyholders' dividends	2	3	5	5
Amortization of deferred acquisition costs	117	126	234	249
Other insurance related expenses	130	125	257	251
Other expenses	5	7	13	15
Total claims, benefits and expenses	761	871	1,470	1,698
Operating income (loss) before income tax	120	70	302	179
Income tax (expense) benefit on operating income (loss)	(42)	(21)	(104)	(56)
Net operating income (loss)	78	49	198	123
Net realized investment gains (losses), pre-tax	2	(5)	6	5
Income tax (expense) benefit on net realized investment gains (losses)	2	(2)	(1)	(4)
Net realized investment gains (losses), after tax	4	(7)	5	1
Net income (loss) from continuing operations	82	42	203	124
International [Member]
Operating Revenues
Net earned premiums	207	231	398	472
Net investment income	13	16	27	31
Other revenues	(1)	0	(1)	0
Total operating revenues	219	247	424	503
Claims, Benefits and Expenses
Net incurred claims and benefits	114	118	230	248
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	45	54	80	109
Other insurance related expenses	31	36	68	76
Other expenses	(5)	5	0	12
Total claims, benefits and expenses	185	213	378	445
Operating income (loss) before income tax	34	34	46	58
Income tax (expense) benefit on operating income (loss)	(12)	(14)	(15)	(22)
Net operating income (loss)	22	20	31	36
Net realized investment gains (losses), pre-tax	1	(3)	2	0
Income tax (expense) benefit on net realized investment gains (losses)	(1)	4	(1)	1
Net realized investment gains (losses), after tax	0	1	1	1
Net income (loss) from continuing operations	22	21	32	37
Life and Group Non-Core [Member]
Operating Revenues
Net earned premiums	137	139	275	278
Net investment income	179	173	358	344
Other revenues	0	8	9	13
Total operating revenues	316	320	642	635
Claims, Benefits and Expenses
Net incurred claims and benefits	344	304	684	610
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	6	7	13	15
Other insurance related expenses	34	31	69	63
Other expenses	5	(3)	9	(2)
Total claims, benefits and expenses	389	339	775	686
Operating income (loss) before income tax	(73)	(19)	(133)	(51)
Income tax (expense) benefit on operating income (loss)	49	28	92	58
Net operating income (loss)	(24)	9	(41)	7
Net realized investment gains (losses), pre-tax	(5)	(4)	(4)	12
Income tax (expense) benefit on net realized investment gains (losses)	6	1	8	(5)
Net realized investment gains (losses), after tax	1	(3)	4	7
Net income (loss) from continuing operations	(23)	6	(37)	14
Corporate and Other Non-Core [Member]
Operating Revenues
Net earned premiums	0	0	0	0
Net investment income	5	7	11	12
Other revenues	3	5	5	7
Total operating revenues	8	12	16	19
Claims, Benefits and Expenses
Net incurred claims and benefits	85	1	81	(2)
Policyholders' dividends	0	0	0	0
Amortization of deferred acquisition costs	0	0	0	0
Other insurance related expenses	(1)	0	(1)	0
Other expenses	47	(31)	93	20
Total claims, benefits and expenses	131	(30)	173	18
Operating income (loss) before income tax	(123)	42	(157)	1
Income tax (expense) benefit on operating income (loss)	42	(15)	54	(1)
Net operating income (loss)	(81)	27	(103)	0
Net realized investment gains (losses), pre-tax	2	3	2	9
Income tax (expense) benefit on net realized investment gains (losses)	(1)	(1)	(1)	(3)
Net realized investment gains (losses), after tax	1	2	1	6
Net income (loss) from continuing operations	(80)	29	(102)	6
Eliminations [Member]
Operating Revenues
Net earned premiums	(1)	0	(1)	(1)
Net investment income	0	0	0	0
Other revenues	0	(2)	(1)	(2)
Total operating revenues	(1)	(2)	(2)	(3)
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	(1)	0	(1)	(1)
Other expenses	0	(2)	(1)	(2)
Total claims, benefits and expenses	(1)	(2)	(2)	(3)
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	Jun. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Reinsurance receivables	$ 4,702	$ 4,742
Insurance receivables	2,245	1,997
Deferred acquisition costs	621	600
Goodwill	153	152
Insurance reserves
Claim and claim adjustment expenses	23,193	23,271
Unearned premiums	3,815	3,592
Future policy benefits	9,360	9,490
Policyholders’ funds	0	27
Specialty [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	697	567
Insurance receivables	862	778
Deferred acquisition costs	306	304
Goodwill	117	117
Insurance reserves
Claim and claim adjustment expenses	6,365	6,229
Unearned premiums	1,794	1,763
Future policy benefits	0	0
Policyholders’ funds		9
Commercial [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	660	690
Insurance receivables	1,068	954
Deferred acquisition costs	224	213
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	9,391	9,514
Unearned premiums	1,384	1,273
Future policy benefits	0	0
Policyholders’ funds		18
International [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	192	207
Insurance receivables	302	250
Deferred acquisition costs	91	83
Goodwill	36	35
Insurance reserves
Claim and claim adjustment expenses	1,401	1,441
Unearned premiums	506	431
Future policy benefits	0	0
Policyholders’ funds		0
Life and Group Non-Core [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	534	525
Insurance receivables	10	13
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	3,248	3,183
Unearned premiums	132	125
Future policy benefits	9,360	9,490
Policyholders’ funds		0
Corporate and Other Non-Core [Member]
Segment Reporting Information [Line Items]
Reinsurance receivables	2,619	2,753
Insurance receivables	3	2
Deferred acquisition costs	0	0
Goodwill	0	0
Insurance reserves
Claim and claim adjustment expenses	2,788	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	(1)	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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues	$ 2,327	$ 2,440	$ 4,679	$ 4,903
Specialty [Domain]
Revenues	904	931	1,821	1,846
Management & Professional Liability [Member]
Revenues	674	710	1,371	1,414
Surety [Member]
Revenues	125	125	245	247
Warranty & Alternative Risks [Member]
Revenues	105	96	205	185
Commercial [Domain]
Revenues	883	936	1,778	1,882
Middle Markets [Member]
Revenues	412	412	821	815
Small Business [Member]
Revenues	158	181	323	365
Other Commercial Insurance [Member]
Revenues	313	343	634	702
International [Domain]
Revenues	220	244	426	503
Canada [Member]
Revenues	54	70	109	141
CNA Europe [Member]
Revenues	77	83	154	171
Hardy [Member]
Revenues	89	91	163	191
Life & Group Non-Core [Domain]
Revenues	311	316	638	647
Corporate and Other [Domain]
Revenues	10	15	18	28
Intersegment Eliminations [Domain]
Revenues	$ (1)	$ (2)	$ (2)	$ (3)

Discontinued Operations Income

Discontinued Operations Income Statement Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Net Investment Income		$ 39		$ 80
Net Realized Investment Gains (Losses)		1		2
Total Revenues		40		82
Claims, Benefits and Expenses
Insurance Claims and Policyholders' Benefits		32		63
Other Operating Expenses		1		2
Total Claims, Benefits and Expenses		33		65
Income before Income Tax		7		17
Income tax (expense) benefit		(1)		(4)
Income from operations of discontinued operations, net of income tax		6		13
Impairment loss on sale, net of income tax benefit		0		(214)
Income (Loss) from Discontinued Operations	$ 0	6	$ 0	(201)
Income tax benefit (expense) on impairment		$ 0		$ 41