The Travelers Companies, Inc. (TRV) 10-Q 22 Oct 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 18, 2013
Entity [Domain]
Registrant name	Travelers Companies, Inc.
Central index key	86312
Document type	10-Q
Document period end date	30-Sep-13
Amendment flag	FALSE
Current fiscal year end date	-19
Well-known seasoned issuer	Yes
Voluntary filers	No
Current reporting status	Yes
Filer category	Large Accelerated Filer
Common stock shares outstanding		364,067,675
Document fiscal year focus	2013
Document fiscal period focus	Q3

Consolidated_Statement_of_Inco

Consolidated Statement of Income (Unaudited) (USD $)	3 Months Ended				9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenues
Premiums	$5,666		$5,666		$16,786		$16,718
Net investment income	657		722		2,014		2,200
Fee income	107		92		286		233
Net realized investment gains (losses)	-22	[1]	-2	[1]	155	[1]	12	[1]
Other revenues	44		34		213		100
Total revenues	6,452		6,512		19,454		19,263
Claims and expenses
Claims and claim adjustment expenses	3,297		3,359		9,980		10,509
Amortization of deferred acquisition costs	953		986		2,851		2,933
General and administrative expenses	934		904		2,780		2,681
Interest expense	91		93		269		285
Total claims and expenses	5,275		5,342		15,880		16,408
Income before income taxes	1,177		1,170		3,574		2,855
Income tax expense	313		306		889		686
Net income	$864		$864		$2,685		$2,169
Net income per share
Net income per share, basic	$2.33		$2.23		$7.12		$5.55
Net income per share, diluted	$2.30		$2.21		$7.05		$5.50
Weighted average number of common shares outstanding
Weighted average number of common shares outstanding, basic	368.9		384		374.1		388
Weighted average number of common shares outstanding, diluted	372.9		387.9		378.1		391.5
[1]	Total other-than-temporary impairment (OTTI) gains (losses) were $0 million and $17 million for the three months ended September 30, 2013 and 2012, respectively, and $(1) million and $28 million for the nine months ended September 30, 2013 and 2012, respectively. Of total OTTI, credit losses of $(3) million for each of the three months ended September 30, 2013 and 2012, and $(10) million and $(11) million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in net realized investment gains (losses). In addition, unrealized gains from other changes in total OTTI of $3 million and $20 million for the three months ended September 30, 2013 and 2012, respectively, and $9 million and $39 million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in other comprehensive income (loss) as part of change in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.

Consolidated_Statement_of_Inco1

Consolidated Statement of Income Parentheticals (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statement of Income (Unaudited)
Total other-than-temporary impairment gains (losses)	$0	$17	($1)	$28
Other-than-temporary impairment, credit losses recognized in net realized investment gains (losses)	-3	-3	-10	-11
Unrealized gains from other changes in total other-than-temporary impairments recognized in other comprehensive income (loss) as part of changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	$3	$20	$9	$39

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statement of Comprehensive Income (Unaudited)
Net income	$864	$864	$2,685	$2,169
Other comprehensive income (loss):
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	-204	470	-2,370	609
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	-2	41	2	71
Net changes in benefit plan assets and obligations	24	22	78	64
Net changes in unrealized foreign currency translation	112	65	-57	43
Other comprehensive income (loss) before income taxes	-70	598	-2,347	787
Income tax expense (benefit)	-55	192	-816	256
Other comprehensive income (loss), net of taxes	-15	406	-1,531	531
Comprehensive income	$849	$1,270	$1,154	$2,700

Consolidated_Balance_Sheet_Una

Consolidated Balance Sheet (Unaudited at September 30, 2013) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Assets
Fixed maturities, available for sale, at fair value (amortized cost $59,960 and $60,829)	$62,102	$65,393
Equity securities, available for sale, at fair value (cost $470 and $462)	708	645
Real estate investments	917	883
Short-term securities	5,379	3,483
Other investments	3,425	3,434
Total investments	72,531	73,838
Cash	295	330	220	214
Investment income accrued	673	752
Premiums receivable	6,113	5,872
Reinsurance recoverables	9,544	10,712
Ceded unearned premiums	1,015	856
Deferred acquisition costs	1,802	1,792
Deferred taxes	321
Contractholder receivables	4,450	4,806
Goodwill	3,365	3,365
Other intangible assets	347	381
Other assets	2,229	2,234
Total assets	102,685	104,938
Liabilities
Claims and claim adjustment expense reserves	49,153	50,922
Unearned premium reserves	11,716	11,241
Contractholder payables	4,450	4,806
Payables for reinsurance premiums	438	346
Deferred taxes		338
Debt	6,346	6,350
Other liabilities	5,771	5,530
Total liabilities	77,874	79,533
Shareholders' equity
Common stock (1,750.0 shares authorized; 364.1 and 377.4 shares issued and outstanding)	21,425	21,161	21,085	20,732
Retained earnings	23,485	21,352	21,226	19,579
Accumulated other comprehensive income	705	2,236	2,536	2,005
Treasury stock, at cost (390.1 and 372.3 shares)	-20,804	-19,344	-18,942	-17,839
Total shareholders' equity	24,811	25,405	25,905
Total liabilities and shareholders' equity	$102,685	$104,938

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet Parentheticals (Unaudited at September 30, 2013) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Consolidated Balance Sheet (Unaudited at September 30, 2013)
Fixed maturities, available for sale, amortized cost	$59,960	$60,829
Equity securities, available for sale, cost	$470	$462
Common stock, shares authorized	1,750	1,750
Common stock, shares issued	364.1	377.4
Common stock, shares outstanding	364.1	377.4	382	392.8
Treasury stock, at cost, shares	390.1	372.3

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Common stock
Common stock, balance, beginning of year	$21,161	$20,732
Common stock, employee share-based compensation	122	219
Common stock, compensation amortization under share-based plans and other changes	142	134
Common stock, balance, end of period	21,425	21,085
Retained earnings
Retained earnings, balance, beginning of year	21,352	19,579
Net income	2,685	2,169
Dividends	-552	-522
Retained earnings, balance, end of period	23,485	21,226
Accumulated other comprehensive income, net of tax
Accumulated other comprehensive income, net of tax, balance, beginning of year	2,236	2,005
Other comprehensive income (loss)	-1,531	531
Accumulated other comprehensive income, net of tax, balance, end of period	705	2,536
Treasury stock (at cost)
Treasury stock (at cost), balance, beginning of year	-19,344	-17,839
Treasury stock (at cost), treasury stock acquired - share repurchase authorization	-1,400	-1,050
Treasury stock (at cost), net shares acquired related to employee share-based compensation plans	-60	-53
Treasury stock (at cost), balance, end of period	-20,804	-18,942
Total shareholders' equity	$24,811	$25,905
Common shares outstanding
Common shares outstanding, balance, beginning of year	377.4	392.8
Common shares outstanding, treasury stock acquired - share repurchase authorization	-17	-17
Common shares outstanding, net shares issued under employee share-based compensation plans	3.7	6.2
Common shares outstanding, balance, end of period	364.1	382

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Cash flows from operating activities
Net income	$2,685		$2,169
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment gains	-155	[1]	-12	[1]
Depreciation and amortization	642		618
Deferred federal income tax expense	132		221
Amortization of deferred acquisition costs	2,851		2,933
Equity in income from other investments	-247		-271
Change in premiums receivable	-242		-307
Change in reinsurance recoverables	1,102		926
Change in deferred acquisition costs	-2,862		-3,005
Change in claims and claim adjustment expense reserves	-1,684		-1,196
Change in unearned premium reserves	483		506
Other operating activities	184		184
Net cash provided by operating activities	2,889		2,766
Cash flows from investing activities
Proceeds from maturities of fixed maturities	5,917		5,855
Proceeds from sales of investments, fixed maturities	1,160		724
Proceeds from sales of investments, equity securities	57		31
Proceeds from sales of investments, real estate investments			3
Proceeds from sales of investments, other investments	545		516
Purchases of investments, fixed maturities	-6,492		-7,677
Purchases of investments, equity securities	-50		-39
Purchases of investments, real estate investments	-65		-62
Purchases of investments, other investments	-312		-292
Net purchases of short-term securities	-1,893		-41
Securities transactions in course of settlement	280		53
Other investing activities	-254		-229
Net cash used in investing activities	-1,107		-1,158
Cash flows from financing activities
Payment of debt	-500		-258
Issuance of debt	494
Dividends paid to shareholders	-549		-519
Issuance of common stock - employee share options	158		247
Treasury stock acquired - share repurchase authorization	-1,400		-1,056
Treasury stock acquired - net employee share-based compensation	-60		-52
Excess tax benefits from share-based payment arrangements	43		32
Net cash used in financing activities	-1,814		-1,606
Effect of exchange rate changes on cash	-3		4
Net increase (decrease) in cash	-35		6
Cash at beginning of year	330		214
Cash at end of period	295		220
Supplemental disclosure of cash flow information
Income taxes paid	724		310
Interest paid	$206		$226
[1]	Total other-than-temporary impairment (OTTI) gains (losses) were $0 million and $17 million for the three months ended September 30, 2013 and 2012, respectively, and $(1) million and $28 million for the nine months ended September 30, 2013 and 2012, respectively. Of total OTTI, credit losses of $(3) million for each of the three months ended September 30, 2013 and 2012, and $(10) million and $(11) million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in net realized investment gains (losses). In addition, unrealized gains from other changes in total OTTI of $3 million and $20 million for the three months ended September 30, 2013 and 2012, respectively, and $9 million and $39 million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in other comprehensive income (loss) as part of change in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.

Basis_of_Presentation_and_Acco

Basis of Presentation and Accounting Policies	9 Months Ended
	Sep. 30, 2013
Basis of Presentation and Accounting Policies disclosure
Basis of Presentation and Accounting Policies disclosure [Text Block]	1.                       BASIS OF PRESENTATION AND ACCOUNTING POLICIES
	Basis of Presentation
	The interim consolidated financial statements include the accounts of The Travelers Companies, Inc. (together with its subsidiaries, the Company). These financial statements are prepared in conformity with U.S. generally accepted accounting principles (GAAP) and are unaudited.  In the opinion of the Company’s management, all adjustments necessary for a fair presentation have been reflected.  Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been omitted.  All material intercompany transactions and balances have been eliminated.  The accompanying interim consolidated financial statements and related notes should be read in conjunction with the Company’s consolidated financial statements and related notes included in the Company’s 2012 Annual Report on Form 10-K.
	The preparation of the interim consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the interim consolidated financial statements and the reported amounts of revenues and claims and expenses during the reporting period.  Actual results could differ from those estimates.
	Adoption of Accounting Standards Updates
	Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income
	In February 2013, the Financial Accounting Standards Board (FASB) issued updated guidance to improve the reporting of reclassifications out of accumulated other comprehensive income. The guidance requires an entity to present, either on the face of the statement of income or in the notes, separately for each component of comprehensive income, the current period reclassifications out of accumulated other comprehensive income by the respective line items of net income affected by the reclassification.
	The updated guidance is effective prospectively for reporting periods beginning after December 15, 2012. The Company adopted the updated guidance effective March 31, 2013, and such adoption did not have any effect on the Company’s results of operations, financial position or liquidity.
	Accounting Standard Not Yet Adopted
	Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity
	In March 2013, the FASB issued updated guidance to resolve diversity in practice concerning the release of the cumulative foreign currency translation adjustment into net income when a parent sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets within a foreign entity.  When a company ceases to have a controlling financial interest in a subsidiary within a foreign entity, the company should recognize any related cumulative translation adjustment into net income only if the sale or transfer results in the complete or substantially complete liquidation of the foreign entity in which the subsidiary had resided. Upon the partial sale of an equity method investment that is a foreign entity, the company should release into earnings a pro rata portion of the cumulative translation adjustment. Upon the partial sale of an equity method investment that is not a foreign entity, the company should release into earnings the cumulative translation adjustment if the partial sale represents a complete or substantially complete liquidation of the foreign entity that holds the equity method investment.  The updated guidance is effective for the quarter ending March 31, 2014.  Early adoption is permitted.  The adoption of this guidance is not expected to have a material effect on the Company’s results of operations, financial position or liquidity.
	Nature of Operations
	The Company is organized into three reportable business segments: Business Insurance; Financial, Professional & International Insurance; and Personal Insurance.  These segments reflect the manner in which the Company’s businesses are currently managed and represent an aggregation of products and services based on type of customer, how the business is marketed and the manner in which risks are underwritten.  The specific business segments are as follows:
	Business Insurance
	The Business Insurance segment offers a broad array of property and casualty insurance and insurance-related services to its clients primarily in the United States. Business Insurance is organized into the following six groups, which collectively comprise Business Insurance Core operations: Select Accounts; Commercial Accounts; National Accounts; Industry-Focused Underwriting; Target Risk Underwriting; and Specialized Distribution.
	Business Insurance also includes the Special Liability Group (which manages the Company’s asbestos and environmental liabilities) and the assumed reinsurance and certain other runoff operations, which collectively are referred to as Business Insurance Other.
	Financial, Professional & International Insurance
	The Financial, Professional & International Insurance segment includes surety and financial liability coverages, which primarily use credit-based underwriting processes, as well as property and casualty products that are primarily marketed on a domestic basis in the United Kingdom, Canada and the Republic of Ireland, and on an international basis through Lloyd’s.  The segment includes Bond & Financial Products as well as International. In addition, the Company owns 49.5% of the common stock of J. Malucelli Participações em Seguros e Resseguros S.A. (JMalucelli), its joint venture in Brazil.  JMalucelli is currently the market leader in surety in Brazil based on market share, and commenced writing other property and casualty insurance business in 2012. The Company’s investment in JMalucelli is accounted for using the equity method and is included in “other investments” on the consolidated balance sheet.
	On June 10, 2013, the Company entered into a definitive agreement to acquire all of the issued and outstanding shares of The Dominion of Canada General Insurance Company (The Dominion) from E-L Financial Corporation Limited (E-L Financial) for an aggregate purchase price of C$1.125 billion (approximately US$1.092 billion at September 30, 2013), subject to adjustment to reflect changes in shareholder’s equity prior to the closing, including a downward adjustment to reflect an anticipated pre-closing dividend.  The purchase price is expected to be funded through a combination of internal funds and proceeds from the Company’s issuance of senior debt.  While the Company has not received final regulatory approvals for its acquisition of The Dominion, the Company expects to receive the remaining approvals and, subject to the satisfaction of customary closing conditions, to close the transaction in the fourth quarter of 2013.  The Dominion primarily markets personal lines and small commercial insurance business in Canada.  The results of operations of the acquired business will be reported in the Company’s Financial, Professional & International Insurance segment from the date of closing.
	Personal Insurance
	The Personal Insurance segment writes a broad range of property and casualty insurance covering individuals’ personal risks. The primary products of automobile and homeowners insurance are complemented by a broad suite of related coverages.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
Segment Information disclosure
Segment Information disclosure [Text Block]	2.                       SEGMENT INFORMATION
	The following tables summarize the components of the Company’s revenues, operating income and total assets by reportable business segments:
	(for the three months	Business			Financial,			Personal			Total
	ended September 30,	Insurance			Professional &			Insurance			Reportable
	in millions)				International						Segments
					Insurance
	2013
	Premiums	$	3,046		$	785		$	1,835		$	5,666
	Net investment income	479			88			90			657
	Fee income	106			1			—			107
	Other revenues	8			5			34			47
	Total operating revenues (1)	$	3,639		$	879		$	1,959		$	6,477
	Operating income (1)	$	526		$	160		$	262		$	948
	2012
	Premiums	$	2,982		$	772		$	1,912		$	5,666
	Net investment income	524			97			101			722
	Fee income	92			—			—			92
	Other revenues	9			8			17			34
	Total operating revenues (1)	$	3,607		$	877		$	2,030		$	6,514
	Operating income (1)	$	543		$	180		$	206		$	929
	(1)                  Operating revenues for reportable business segments exclude net realized investment gains (losses). Operating income for reportable business segments equals net income excluding the after-tax impact of net realized investment gains (losses).
	(for the nine months	Business			Financial,			Personal			Total
	ended September 30,	Insurance			Professional &			Insurance			Reportable
	in millions)				International						Segments
					Insurance
	2013
	Premiums	$	9,006		$	2,271		$	5,509		$	16,786
	Net investment income	1,468			271			275			2,014
	Fee income	285			1			—			286
	Other revenues	135			15			67			217
	Total operating revenues (1)	$	10,894		$	2,558		$	5,851		$	19,303
	Operating income (1)	$	1,695		$	477		$	601		$	2,773
	2012
	Premiums	$	8,718		$	2,275		$	5,725		$	16,718
	Net investment income	1,592			300			308			2,200
	Fee income	232			1			—			233
	Other revenues	31			21			52			104
	Total operating revenues (1)	$	10,573		$	2,597		$	6,085		$	19,255
	Operating income (1)	$	1,517		$	511		$	331		$	2,359
	(1)                  Operating revenues for reportable business segments exclude net realized investment gains (losses). Operating income for reportable business segments equals net income excluding the after-tax impact of net realized investment gains (losses).
	Business Segment Reconciliations
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(in millions)	2013			2012			2013			2012
	Revenue reconciliation
	Earned premiums
	Business Insurance:
	Workers’ compensation	$	896		$	841		$	2,640		$	2,378
	Commercial automobile	476			488			1,425			1,462
	Commercial property	432			414			1,259			1,207
	General liability	452			444			1,333			1,313
	Commercial multi-peril	779			785			2,320			2,333
	Other	11			10			29			25
	Total Business Insurance	3,046			2,982			9,006			8,718
	Financial, Professional & International Insurance:
	Fidelity and surety	235			240			683			699
	General liability	227			216			661			633
	International	279			274			795			818
	Other	44			42			132			125
	Total Financial, Professional & International Insurance	785			772			2,271			2,275
	Personal Insurance:
	Automobile	855			916			2,591			2,762
	Homeowners and other	980			996			2,918			2,963
	Total Personal Insurance	1,835			1,912			5,509			5,725
Total earned premiums	5,666			5,666			16,786			16,718
Net investment income	657			722			2,014			2,200
Fee income	107			92			286			233
Other revenues	47			34			217			104
Total operating revenues for reportable segments	6,477			6,514			19,303			19,255
Other revenues	(3		)	—			(4		)	(4		)
Net realized investment gains (losses)	(22		)	(2		)	155			12
Total consolidated revenues	$	6,452		$	6,512		$	19,454		$	19,263
Income reconciliation, net of tax
Total operating income for reportable segments	$	948		$	929		$	2,773		$	2,359
Interest Expense and Other (1)	(65		)	(62		)	(187		)	(196		)
Total operating income	883			867			2,586			2,163
Net realized investment gains (losses)	(19		)	(3		)	99			6
Total consolidated net income	$	864		$	864		$	2,685		$	2,169
(1)                   The primary component of Interest Expense and Other is after-tax interest expense of $59 million and $60 million in the three months ended September 30, 2013 and 2012, respectively, and $175 million and $185 million in the nine months ended September 30, 2013 and 2012, respectively.
(in millions)	September 30,			December 31,
	2013			2012
Asset reconciliation:
Business Insurance	$	74,931		$	76,972
Financial, Professional & International Insurance	14,084			13,452
Personal Insurance	13,173			14,195
Total assets for reportable segments	102,188			104,619
Other assets (1)	497			319
Total consolidated assets	$	102,685		$	104,938
(1)                   The primary components of other assets at September 30, 2013 were deferred taxes and other intangible assets.  The primary component of other assets at December 31, 2012 was other intangible assets.

Investments

Investments	9 Months Ended
	Sep. 30, 2013
Investments disclosure
Investments disclsoure [Text Block]	3.                       INVESTMENTS
	Fixed Maturities
	The amortized cost and fair value of investments in fixed maturities classified as available for sale were as follows:
		Amortized		Gross Unrealized				Fair
	(at September 30, 2013, in millions)	Cost		Gains		Losses		Value
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,069	$	48	$	8	$	2,109
	Obligations of states, municipalities and political subdivisions:
	Pre-refunded	9,141		489		1		9,629
	All other	25,817		1,137		333		26,621
	Total obligations of states, municipalities and political subdivisions	34,958		1,626		334		36,250
	Debt securities issued by foreign governments	1,937		40		3		1,974
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,337		191		12		2,516
	All other corporate bonds	18,633		833		245		19,221
	Redeemable preferred stock	26		6		—		32
	Total	$	59,960	$	2,744	$	602	$	62,102
		Amortized		Gross Unrealized				Fair
	(at December 31, 2012, in millions)	Cost		Gains		Losses		Value
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,148	$	75	$	1	$	2,222
	Obligations of states, municipalities and political subdivisions:
	Pre-refunded	8,458		567		—		9,025
	All other	27,405		2,262		11		29,656
	Total obligations of states, municipalities and political subdivisions	35,863		2,829		11		38,681
	Debt securities issued by foreign governments	2,185		72		—		2,257
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,744		255		2		2,997
	All other corporate bonds	17,863		1,360		20		19,203
	Redeemable preferred stock	26		7		—		33
	Total	$	60,829	$	4,598	$	34	$	65,393
	Pre-refunded bonds of $9.63 billion and $9.03 billion at September 30, 2013 and December 31, 2012, respectively, are bonds for which states or municipalities have established irrevocable trusts, almost exclusively comprised of U.S. Treasury securities, which were created to satisfy their responsibility for payments of principal and interest.
	Equity Securities
	The cost and fair value of investments in equity securities were as follows:
				Gross Unrealized				Fair
	(at September 30, 2013, in millions)	Cost		Gains		Losses		Value
	Common stock	$	380	$	205	$	1	$	584
	Non-redeemable preferred stock	90		35		1		124
	Total	$	470	$	240	$	2	$	708
				Gross Unrealized				Fair
	(at December 31, 2012, in millions)	Cost		Gains		Losses		Value
	Common stock	$	366	$	148	$	4	$	510
	Non-redeemable preferred stock	96		39		—		135
	Total	$	462	$	187	$	4	$	645
	Unrealized Investment Losses
	The following tables summarize, for all investments in an unrealized loss position at September 30, 2013 and December 31, 2012, the aggregate fair value and gross unrealized loss by length of time those securities have been continuously in an unrealized loss position.  The fair value amounts reported in the tables are estimates that are prepared using the process described in note 4.
		Less than 12 months				12 months or longer					Total
	(at September 30, 2013, in millions)	Fair		Gross		Fair		Gross			Fair		Gross
		Value		Unrealized		Value		Unrealized			Value		Unrealized
				Losses				Losses					Losses
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	238	$	8	$	—	$	—		$	238	$	8
	Obligations of states, municipalities and political subdivisions	4,852		333		11		1			4,863		334
	Debt securities issued by foreign governments	420		3		—		—			420		3
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	436		10		22		2			458		12
	All other corporate bonds	5,481		231		107		14			5,588		245
	Total fixed maturities	11,427		585		140		17			11,567		602
	Equity securities
	Common stock	37		1		—		—			37		1
	Non-redeemable preferred stock	28		1		—		—			28		1
	Total equity securities	65		2		—		—			65		2
	Total	$	11,492	$	587	$	140	$	17		$	11,632	$	604
		Less than 12 months				12 months or longer					Total
	(at December 31, 2012, in millions)	Fair		Gross		Fair		Gross			Fair		Gross
		Value		Unrealized		Value		Unrealized			Value		Unrealized
				Losses				Losses					Losses
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	589	$	1	$	—	$	—		$	589	$	1
Obligations of states, municipalities and political subdivisions	611		9		45		2			656		11
Debt securities issued by foreign governments	186		—		2		—			188		—
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	70		—		36		2			106		2
All other corporate bonds	1,097		13		89		7			1,186		20
Total fixed maturities	2,553		23		172		11			2,725		34
Equity securities
Common stock	40		4		—		—			40		4
Non-redeemable preferred stock	13		—		—		—			13		—
Total equity securities	53		4		—		—			53		4
Total	$	2,606	$	27	$	172	$	11		$	2,778	$	38
The following table summarizes, for all fixed maturities and equity securities reported at fair value for which fair value is less than 80% of amortized cost at September 30, 2013, the gross unrealized investment loss by length of time those securities have continuously been in an unrealized loss position of greater than 20% of amortized cost:
	Period For Which Fair Value Is Less Than 80% of Amortized Cost
(in millions)	3 Months		Greater Than 3		Greater Than 6		Greater Than			Total
	or Less		Months, 6 Months		Months, 12 Months		12 Months
			or Less		or Less
Fixed maturities
Mortgage-backed securities	$	—	$	—	$	—	$	—		$	—
Other	5		2		—		4			11
Total fixed maturities	5		2		—		4			11
Equity securities	1		—		—		—			1
Total	$	6	$	2	$	—	$	4		$	12
These unrealized losses at September 30, 2013 represented less than 1% of the combined fixed maturity and equity security portfolios on a pretax basis and less than 1% of shareholders’ equity on an after-tax basis.
Impairment Charges
Impairment charges included in net realized investment gains (losses) in the consolidated statement of income were as follows:
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2013		2012		2013		2012
Fixed maturities
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	—	$	—	$	—	$	—
Obligations of states, municipalities and political subdivisions	—		—		—		—
Debt securities issued by foreign governments	—		—		—		—
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	—		—		2		3
All other corporate bonds	—		1		—		4
Redeemable preferred stock	—		—		—		—
Total fixed maturities	—		1		2		7
Equity securities
Common stock	2		1		3		1
Non-redeemable preferred stock	—		1		—		1
Total equity securities	2		2		3		2
Other investments	1		—		5		2
Total	$	3	$	3	$	10	$	11
The following tables present the changes during the reporting period in the credit component of other-than-temporary impairments (OTTI) on fixed maturities recognized in the consolidated statement of income for which a portion of the OTTI was recognized in other comprehensive income:
	2013
(for the three months ended September 30, in	Cumulative		Additions for		Additions for		Reductions			Adjustments		Cumulative
millions)	OTTI Credit		OTTI Securities		OTTI		Due to			to Book Value		OTTI Credit
	Losses		Where No		Securities		Sales/Defaults			of Credit-		Losses
	Recognized for		Credit Losses		Where Credit		of Credit-			Impaired		Recognized for
	Securities		Were Previously		Losses Have		Impaired			Securities due		Securities Still
	Held,		Recognized		Been		Securities			to Changes in		Held, End of
	Beginning of				Previously					Cash Flows		Period
	Period				Recognized
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	67	$	—	$	—	$	—		$	2	$	69
All other corporate bonds	104		—		—		—			1		105
Total fixed maturities	$	171	$	—	$	—	$	—		$	3	$	174
(for the nine months ended September 30, in
millions)
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	63	$	—	$	2	$	—		$	4	$	69
All other corporate bonds	102		—		—		—			3		105
Total fixed maturities	$	165	$	—	$	2	$	—		$	7	$	174
	2012
(for the three months ended September 30, in	Cumulative		Additions for		Additions for		Reductions			Adjustments		Cumulative
millions)	OTTI Credit		OTTI Securities		OTTI		Due to			to Book Value		OTTI Credit
	Losses		Where No		Securities		Sales/Defaults			of Credit-		Losses
	Recognized for		Credit Losses		Where Credit		of Credit-			Impaired		Recognized for
	Securities		Were Previously		Losses Have		Impaired			Securities due		Securities Still
	Held,		Recognized		Been		Securities			to Changes in		Held, End of
	Beginning of				Previously					Cash Flows		Period
	Period				Recognized
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	61	$	—	$	—	$	(1	)	$	1	$	61
All other corporate bonds	99		—		1		—			1		101
Total fixed maturities	$	160	$	—	$	1	$	(1	)	$	2	$	162
(for the nine months ended September 30, in
millions)
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	58	$	—	$	3	$	(1	)	$	1	$	61
All other corporate bonds	94		—		4		—			3		101
Total fixed maturities	$	152	$	—	$	7	$	(1	)	$	4	$	162
Derivative Financial Instruments
From time to time, the Company enters into U.S. Treasury futures contracts to modify the effective duration of specific assets within the investment portfolio.  U.S. Treasury futures contracts require a daily mark-to-market and settlement with the broker.  At September 30, 2013 and December 31, 2012, the Company had $0 and $800 million notional value of open U.S. Treasury futures contracts, respectively.  Net realized investment gains (losses) in the three months ended September 30, 2013 and 2012 included net gains of $0 and net losses of $8 million, respectively, related to U.S. Treasury futures contracts.  Net realized investment gains (losses) in the nine months ended September 30, 2013 and 2012 included net gains of $115 million and net losses of $15 million, respectively, related to U.S. Treasury futures contracts.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Measurements disclosure
Fair Value Measurements disclosure [Text Block]
	4.                       FAIR VALUE MEASUREMENTS
	The Company’s estimates of fair value for financial assets and financial liabilities are based on the framework established in the fair value accounting guidance.  The framework is based on the inputs used in valuation, gives the highest priority to quoted prices in active markets and requires that observable inputs be used in the valuations when available.  The disclosure of fair value estimates in the fair value accounting guidance hierarchy is based on whether the significant inputs into the valuation are observable.  In determining the level of the hierarchy in which the estimate is disclosed, the highest priority is given to unadjusted quoted prices in active markets and the lowest priority to unobservable inputs that reflect the Company’s significant market assumptions.  The level in the fair value hierarchy within which the fair value measurement is reported is based on the lowest level input that is significant to the measurement in its entirety.  The three levels of the hierarchy are as follows:
	·                  Level 1- Unadjusted quoted market prices for identical assets or liabilities in active markets that the Company has the ability to access.
	·                  Level 2- Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; or valuations based on models where the significant inputs are observable (e.g., interest rates, yield curves, prepayment speeds, default rates, loss severities, etc.) or can be corroborated by observable market data.
	·                  Level 3- Valuations based on models where significant inputs are not observable.  The unobservable inputs reflect the Company’s own assumptions about the inputs that market participants would use.
	Valuation of Investments Reported at Fair Value in Financial Statements
	The fair value of a financial instrument is the estimated amount at which the instrument could be exchanged in an orderly transaction between knowledgeable, unrelated, willing parties, i.e., not in a forced transaction.  The estimated fair value of a financial instrument may differ from the amount that could be realized if the security was sold in an immediate sale, e.g., a forced transaction.  Additionally, the valuation of investments is more subjective when markets are less liquid due to the lack of market based inputs, which may increase the potential that the estimated fair value of an investment is not reflective of the price at which an actual transaction would occur.
	For investments that have quoted market prices in active markets, the Company uses the unadjusted quoted market prices as fair value and includes these prices in the amounts disclosed in Level 1 of the hierarchy.  The Company receives the quoted market prices from a third party, nationally recognized pricing service (pricing service).  When quoted market prices are unavailable, the Company utilizes a pricing service to determine an estimate of fair value, which is mainly used for its fixed maturity investments.  The fair value estimates provided from this pricing service are included in the amount disclosed in Level 2 of the hierarchy.  If quoted market prices and an estimate from a pricing service are unavailable, the Company produces an estimate of fair value based on internally developed valuation techniques, which, depending on the level of observable market inputs, will render the fair value estimate as Level 2 or Level 3.  The Company bases all of its estimates of fair value for assets on the bid price as it represents what a third-party market participant would be willing to pay in an arm’s length transaction.
	Fixed Maturities
	The Company utilized a pricing service to estimate fair value measurements for approximately 98% of its fixed maturities at both September 30, 2013 and December 31, 2012.  The pricing service utilizes market quotations for fixed maturity securities that have quoted prices in active markets.  Since fixed maturities other than U.S. Treasury securities generally do not trade on a daily basis, the pricing service prepares estimates of fair value measurements for these securities using its proprietary pricing applications, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings and matrix pricing.  Additionally, the pricing service uses an Option Adjusted Spread model to develop prepayment and interest rate scenarios.
	The pricing service evaluates each asset class based on relevant market information, relevant credit information, perceived market movements and sector news.  The market inputs utilized in the pricing evaluation, listed in the approximate order of priority, include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events.  The extent of the use of each market input depends on the asset class and the market conditions.  Depending on the security, the priority of the use of inputs may change or some market inputs may not be relevant.  For some securities, additional inputs may be necessary.
	The pricing service utilized by the Company has indicated that it will only produce an estimate of fair value if there is objectively verifiable information to produce a valuation.  If the pricing service discontinues pricing an investment, the Company would be required to produce an estimate of fair value using some of the same methodologies as the pricing service but would have to make assumptions for market-based inputs that are unavailable due to market conditions.
	The fair value estimates of most fixed maturity investments are based on observable market information rather than market quotes.  Accordingly, the estimates of fair value for such fixed maturities, other than U.S. Treasury securities, provided by the pricing service are included in the amount disclosed in Level 2 of the hierarchy.  The estimated fair value of U.S. Treasury securities is included in the amount disclosed in Level 1 as the estimates are based on unadjusted market prices.
	The Company also holds certain fixed maturity investments which are not priced by the pricing service and, accordingly, estimates the fair value of such fixed maturities using an internal matrix that is based on market information regarding interest rates, credit spreads and liquidity.  The underlying source data for calculating the matrix of credit spreads relative to the U.S. Treasury curve are the BofA Merrill Lynch U.S. Corporate Index and the BofA Merrill Lynch High Yield BB Rated Index.  The Company includes the fair value estimates of these corporate bonds in Level 2, since all significant inputs are market observable.
	While the vast majority of the Company’s municipal bonds and corporate bonds are included in Level 2, the Company holds a number of municipal bonds and corporate bonds which are not valued by the pricing service and estimates the fair value of these bonds using an internal pricing matrix with some unobservable inputs that are significant to the valuation.  Due to the limited amount of observable market information, the Company includes the fair value estimates for these particular bonds in Level 3.  The fair value of the fixed maturities for which the Company used an internal pricing matrix was $103 million at September 30, 2013 and $102 million at December 31, 2012. Additionally, the Company holds a small amount of other fixed maturity investments that have characteristics that make them unsuitable for matrix pricing.  For these fixed maturities, the Company obtains a quote from a broker (primarily the market maker).  The fair value of the fixed maturities for which the Company received a broker quote was $150 million and $128 million at September 30, 2013 and December 31, 2012, respectively. Due to the disclaimers on the quotes that indicate that the price is indicative only, the Company includes these fair value estimates in Level 3.
	Equities — Public Common and Preferred
	For public common and preferred stocks, the Company receives prices from a nationally recognized pricing service that are based on observable market transactions and includes these estimates in the amount disclosed in Level 1.  When current market quotes in active markets are unavailable for certain non-redeemable preferred stocks held by the Company, the Company receives an estimate of fair value from the pricing service that provides fair value estimates for the Company’s fixed maturities. The service utilizes some of the same methodologies to price the non-redeemable preferred stocks as it does for the fixed maturities. The Company includes the fair value estimate for these non-redeemable preferred stocks in the amount disclosed in Level 2.
	Other Investments
	The Company holds investments in various publicly-traded securities which are reported in other investments.  These investments include securities in the Company’s trading portfolio, mutual funds and other small holdings.  The $18 million and $46 million fair value of these investments at September 30, 2013 and December 31, 2012, respectively, was disclosed in Level 1.  At September 30, 2013 and December 31, 2012, the Company held investments in non-public common and preferred equity securities, with fair value estimates of $32 million and $54 million, respectively, reported in other investments, where the fair value estimate is determined either internally or by an external fund manager based on recent filings, operating results, balance sheet stability, growth and other business and market sector fundamentals.  Due to the significant unobservable inputs in these valuations, the Company includes the total fair value estimate for all of these investments at September 30, 2013 and December 31, 2012 in the amount disclosed in Level 3.
	Derivatives
	At September 30, 2013 and December 31, 2012, the Company held $20 million and $21 million, respectively, of convertible bonds containing embedded conversion options that are valued separately from the host bond contract in the amount disclosed in Level 2 — fixed maturities.
	Fair Value Hierarchy
	The following tables present the level within the fair value hierarchy at which the Company’s financial assets and financial liabilities reported at fair value are measured on a recurring basis at September 30, 2013 and December 31, 2012.  An investment transferred between levels during a period is transferred at its fair value as of the beginning of that period.
	(at September 30, 2013, in millions)	Total			Level 1			Level 2			Level 3
	Invested assets:
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,109		$	2,092		$	17		$	—
	Obligations of states, municipalities and political subdivisions	36,250			2			36,224			24
	Debt securities issued by foreign governments	1,974			—			1,974			—
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,516			—			2,484			32
	All other corporate bonds	19,221			—			19,024			197
	Redeemable preferred stock	32			—			32			—
	Total fixed maturities	62,102			2,094			59,755			253
	Equity securities
	Common stock	584			584			—			—
	Non-redeemable preferred stock	124			24			100			—
	Total equity securities	708			608			100			—
	Other investments	50			18			—			32
	Total	$	62,860		$	2,720		$	59,855		$	285
	During the nine months ended September 30, 2013, the Company had transfers of $32 million of redeemable preferred stock and $59 million of non-redeemable preferred stock from Level 1 to Level 2.  The Company also had transfers of $3 million of non-redeemable preferred stock from Level 2 to Level 1.
	(at December 31, 2012, in millions)	Total			Level 1			Level 2			Level 3
	Invested assets:
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,222		$	2,205		$	17		$	—
	Obligations of states, municipalities and political subdivisions	38,681			—			38,653			28
	Debt securities issued by foreign governments	2,257			—			2,257			—
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,997			—			2,992			5
	All other corporate bonds	19,203			—			19,006			197
	Redeemable preferred stock	33			32			1			—
	Total fixed maturities	65,393			2,237			62,926			230
	Equity securities
	Common stock	510			510			—			—
	Non-redeemable preferred stock	135			92			43			—
	Total equity securities	645			602			43			—
	Other investments	100			46			—			54
	Total	$	66,138		$	2,885		$	62,969		$	284
	During the year ended December 31, 2012, the Company had transfers of $4 million of non-redeemable preferred stock from Level 1 to Level 2.
	The following tables present the changes in the Level 3 fair value category during the three months and nine months ended September 30, 2013 and the twelve months ended December 31, 2012.
	Three Months Ended September 30, 2013 (in millions)	Fixed			Other			Total
		Maturities			Investments
	Balance at June 30, 2013	$	225		$	33		$	258
	Total realized and unrealized investment gains (losses):
	Reported in net realized investment gains (1)	1			(1		)	—
Reported in increases (decreases) in other comprehensive income	2			—			2
Purchases, sales and settlements/maturities:
Purchases	42			—			42
Sales	(1		)	—			(1		)
Settlements/maturities	(11		)	—			(11		)
Gross transfers into Level 3	2			—			2
Gross transfers out of Level 3	(7		)	—			(7		)
Balance at September 30, 2013	$	253		$	32		$	285
Amount of total realized investment gains (losses) for the period included in the consolidated statement of income attributable to changes in the fair value of assets still held at the reporting date	$	—		$	—		$	—
(1)                 Includes impairments on investments held at the end of the period as well as amortization on fixed maturities.
Nine Months Ended September 30, 2013 (in millions)	Fixed			Other			Total
	Maturities			Investments
Balance at December 31, 2012	$	230		$	54		$	284
Total realized and unrealized investment gains (losses):
Reported in net realized investment gains (1)	3			12			15
Reported in increases (decreases) in other comprehensive income	—			(1		)	(1		)
Purchases, sales and settlements/maturities:
Purchases	119			—			119
Sales	(25		)	(33		)	(58		)
Settlements/maturities	(58		)	—			(58		)
Gross transfers into Level 3	15			—			15
Gross transfers out of Level 3	(31		)	—			(31		)
Balance at September 30, 2013	$	253		$	32		$	285
Amount of total realized investment gains (losses) for the period included in the consolidated statement of income attributable to changes in the fair value of assets still held at the reporting date	$	—		$	—		$	—
(1)         Includes impairments on investments held at the end of the period as well as amortization on fixed maturities.
Twelve Months Ended December 31, 2012 (in millions)	Fixed			Other			Total
	Maturities			Investments
Balance at December 31, 2011	$	250		$	44		$	294
Total realized and unrealized investment gains (losses):
Reported in net realized investment gains (1)	4			5			9
Reported in increases (decreases) in other comprehensive income	5			2			7
Purchases, sales and settlements/maturities:
Purchases	79			3			82
Sales	—			—			—
Settlements/maturities	(94		)	—			(94		)
Gross transfers into Level 3	10			—			10
Gross transfers out of Level 3	(24		)	—			(24		)
Balance at December 31, 2012	$	230		$	54		$	284
Amount of total realized investment gains (losses) for the period included in the consolidated statement of income attributable to changes in the fair value of assets still held at the reporting date	$	—		$	—		$	—
(1)                               Includes impairments on investments held at the end of the period as well as amortization on fixed maturities.
Financial Instruments Disclosed, But Not Carried, At Fair Value
The Company uses various financial instruments in the normal course of its business. The Company’s insurance contracts are excluded from fair value of financial instruments accounting guidance and, therefore, are not included in the amounts discussed below. The following tables present the carrying value and fair value of the Company’s financial assets and financial liabilities disclosed, but not carried, at fair value at September 30, 2013 and December 31, 2012, and the level within the fair value hierarchy at which such assets and liabilities are measured on a recurring basis.
(at September 30, 2013, in millions)	Carrying			Fair			Level 1			Level 2		Level 3
	Value			Value
Financial assets:
Short-term securities	$	5,379		$	5,379		$	1,995		$	3,323	$	61
Financial liabilities:
Debt	$	6,246		$	7,239		$	—		$	7,239	$	—
Commercial paper	$	100		$	100		$	—		$	100	$	—
(at December 31, 2012, in millions)	Carrying			Fair			Level 1			Level 2		Level 3
	Value			Value
Financial assets:
Short-term securities	$	3,483		$	3,483		$	1,448		$	1,957	$	78
Financial liabilities:
Debt	$	6,250		$	7,715		$	—		$	7,715	$	—
Commercial paper	$	100		$	100		$	—		$	100	$	—
The Company utilized a pricing service to estimate fair value for approximately 98% and 95% of short-term securities at September 30, 2013 and December 31, 2012, respectively. A description of the process and inputs used by the pricing service to estimate fair value is discussed in the “Fixed Maturities” section above. Estimates of fair value for U.S. Treasury securities and money market funds are based on market quotations received from the pricing service and are disclosed in Level 1 of the hierarchy.  The fair value of other short-term fixed maturity securities is estimated by the pricing service using observable market inputs and is disclosed in Level 2 of the hierarchy.  For short-term securities where an estimate is not obtained from the pricing service, the carrying value approximates fair value and is included in Level 3 of the hierarchy.
The Company utilized a pricing service to estimate fair value for 100% of its debt, including commercial paper, at both September 30, 2013 and December 31, 2012. The pricing service utilizes market quotations for debt that have quoted prices in active markets. Since fixed maturities other than U.S. Treasury securities generally do not trade on a daily basis, the fair value estimates are based on market observable inputs and disclosed in Level 2 of the hierarchy.
The Company had no material assets or liabilities that were measured at fair value on a non-recurring basis during the nine months ended September 30, 2013 or twelve months ended December 31, 2012.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Other Intangible Assets disclosure
Goodwill and Other Intangible Assets disclosure [Text Block]
	5.                       GOODWILL AND OTHER INTANGIBLE ASSETS
	Goodwill
	The following table presents the carrying amount of the Company’s goodwill by segment at September 30, 2013 and December 31, 2012:
	(in millions)	September 30,		December 31,
		2013		2012
	Business Insurance	$	2,168	$	2,168
	Financial, Professional & International Insurance	557		557
	Personal Insurance	613		613
	Other	27		27
	Total	$	3,365	$	3,365
	Other Intangible Assets
	The following presents a summary of the Company’s other intangible assets by major asset class at September 30, 2013 and December 31, 2012:
	(at September 30, 2013, in millions)	Gross		Accumulated		Net
		Carrying		Amortization
		Amount
	Intangibles subject to amortization
	Customer-related	$	455	$	406	$	49
	Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables (1)	191		109		82
	Total intangible assets subject to amortization	646		515		131
	Intangible assets not subject to amortization	216		—		216
	Total other intangible assets	$	862	$	515	$	347
	(at December 31, 2012, in millions)	Gross		Accumulated		Net
		Carrying		Amortization
		Amount
	Intangibles subject to amortization
	Customer-related	$	455	$	383	$	72
	Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables (1)	191		98		93
	Total intangible assets subject to amortization	646		481		165
	Intangible assets not subject to amortization	216		—		216
	Total other intangible assets	$	862	$	481	$	381
	(1)                    The time value of money and the risk margin (cost of capital) components of the intangible asset run off at different rates, and, as such, the amount recognized in income may be a net benefit in some periods and a net expense in other periods.
	The following presents a summary of the Company’s amortization expense for other intangible assets by major asset class:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in millions)	2013		2012		2013		2012
	Customer-related	$	8	$	8	$	23	$	26
	Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables	3		4		11		14
	Total amortization expense	$	11	$	12	$	34	$	40
	Intangible asset amortization expense is estimated to be $11 million for the remainder of 2013, $43 million in 2014, $23 million in 2015, $9 million in 2016, and $8 million in 2017.

Other_Comprehensive_Income_and

Other Comprehensive Income and Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2013
Other Comprehensive Income and Accumulated Other Comprehensive Income disclosure
Other Comprehensive Income and Accumulated Other Comprehensive Income disclosure [Text Block]	6.                                      OTHER COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME
	The following table presents the changes in the Company’s accumulated other comprehensive income (AOCI) for the nine months ended September 30, 2013.
	(in millions)	Changes in Net			Changes in Net			Net Benefit Plan			Net Unrealized			Total Accumulated
		Unrealized Gains on			Unrealized Gains on			Assets and			Foreign Currency			Other
		Investment			Investment Securities			Obligations			Translation			Comprehensive
		Securities Having No			Having Credit Losses			Recognized in						Income
		Credit Losses			Recognized in the			Shareholders’ Equity
		Recognized in the			Consolidated
		Consolidated			Statement of Income
		Statement of Income
	Balance, December 31, 2012	$	2,908		$	195		$	(857	)	$	(10	)	$	2,236
	Other comprehensive income (loss) (OCI) before reclassifications	(1,510		)	1			(1		)	(45		)	(1,555		)
	Amounts reclassified from AOCI	(36		)	1			51			8			24
	Net OCI, current period	(1,546		)	2			50			(37		)	(1,531		)
	Balance, September 30, 2013	$	1,362		$	197		$	(807	)	$	(47	)	$	705
	The following table presents the pretax and related income tax expense (benefit) components of the amounts reclassified from the Company’s AOCI to the Company’s consolidated statement of income for the three months and nine months ended September 30, 2013.
	(in millions)	Three Months			Nine Months
		Ended			Ended
		September 30, 2013			September 30, 2013
	Reclassification adjustments related to unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income (1)	$	(4	)	$	(55	)
	Income tax expense (2)	(1		)	(19		)
	Net of taxes	(3		)	(36		)
	Having credit losses recognized in the consolidated statement of income (1)	—			2
	Income tax benefit (2)	—			1
	Net of taxes	—			1
	Reclassification adjustment related to benefit plan assets and obligations (3)	26			78
	Income tax benefit (2)	9			27
	Net of taxes	17			51
	Reclassification adjustment related to foreign currency translation (1)	11			8
	Income tax benefit (2)	—			—
	Net of taxes	11			8
	Total reclassifications	33			33
	Total income tax benefit	8			9
	Total reclassifications, net of taxes	$	25		$	24
	(1)         (Increases) decreases net realized investment gains (losses) on the consolidated statement of income.
	(2)         (Increases) decreases income tax expense on the consolidated statement of income.
	(3)         Increases (decreases) general and administrative expenses on the consolidated statement of income.
	The following tables present the pretax components of other comprehensive income (loss) and related income tax expense (benefit) for the three months and nine months ended September 30, 2013 and 2012.
	(for the three months ended September 30, in millions)	2013			2012
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	$	(204	)	$	470
	Income tax expense (benefit)	(72		)	162
	Net of taxes	(132		)	308
	Having credit losses recognized in the consolidated statement of income	(2		)	41
	Income tax expense (benefit)	(1		)	15
	Net of taxes	(1		)	26
	Net changes in benefit plan assets and obligations	24			22
	Income tax expense	9			7
	Net of taxes	15			15
	Net changes in unrealized foreign currency translation	112			65
	Income tax expense	9			8
	Net of taxes	103			57
	Total other comprehensive income (loss)	(70		)	598
	Total income tax expense (benefit)	(55		)	192
	Total other comprehensive income (loss), net of taxes	$	(15	)	$	406
	(for the nine months ended September 30, in millions)	2013			2012
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	$	(2,370	)	$	609
	Income tax expense (benefit)	(824		)	212
	Net of taxes	(1,546		)	397
	Having credit losses recognized in the consolidated statement of income	2			71
	Income tax expense	—			25
	Net of taxes	2			46
Net changes in benefit plan assets and obligations	78			64
Income tax expense	28			22
Net of taxes	50			42
Net changes in unrealized foreign currency translation	(57		)	43
Income tax benefit	(20		)	(3		)
Net of taxes	(37		)	46
Total other comprehensive income (loss)	(2,347		)	787
Total income tax expense (benefit)	(816		)	256
Total other comprehensive income (loss), net of taxes	$	(1,531	)	$	531

Debt

Debt	9 Months Ended
	Sep. 30, 2013
Debt disclosure
Debt disclosure [Text Block]	7.                                        DEBT
	Debt Issuance. On July 25, 2013, the Company issued $500 million aggregate principal amount of 4.60% senior notes that will mature on August 1, 2043. The net proceeds of the issuance, after original issuance discount and the deduction of underwriting expenses and commissions and other expenses, totaled approximately $494 million. Interest on the senior notes is payable semi-annually in arrears on February 1 and August 1, commencing on February 1, 2014. The senior notes are redeemable in whole at any time or in part from time to time, at the Company’s option, at a redemption price equal to the greater of (a) 100% of the principal amount of senior notes to be redeemed or (b) the sum of the present value of the remaining scheduled payments of principal and interest on the senior notes to be redeemed (exclusive of interest accrued to the date of redemption) discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the then current treasury rate (as defined) plus 15 basis points.
	Debt Payment. On March 15, 2013, the Company’s $500 million, 5.00% senior notes matured and were fully paid.
	Credit Agreement. On June 7, 2013, the Company entered into a five-year, $1.0 billion revolving credit agreement with a syndicate of financial institutions, replacing its three-year $1.0 billion credit agreement that was due to expire on June 10, 2013. Pursuant to the credit agreement covenants, the Company must maintain a minimum consolidated net worth, defined as shareholders’ equity determined in accordance with GAAP plus (a) trust preferred securities (not to exceed 15% of total capital) and (b) mandatorily convertible securities (combined with trust preferred securities, not to exceed 25% of total capital) less goodwill and other intangible assets. That threshold is adjusted downward by an amount equal to 70% of the aggregate amount of common stock repurchased by the Company after March 31, 2013, up to a maximum deduction of $1.75 billion.  The threshold was $14.71 billion at September 30, 2013 and could decline to a minimum of $13.73 billion during the term of the credit agreement, subject to the Company repurchasing an additional $1.40 billion of its common stock. In addition, the credit agreement contains other customary restrictive covenants as well as certain customary events of default, including with respect to a change in control, which is defined to include the acquisition of 35% or more of the Company’s voting stock and certain changes in the composition of the Company’s board of directors.  At September 30, 2013, the Company was in compliance with these covenants.  Generally, the cost of borrowing under this agreement will range from LIBOR plus 87.5 basis points to LIBOR plus 150 basis points, depending on the Company’s credit ratings.  At September 30, 2013, that cost would have been LIBOR plus 112.5 basis points, had there been any amounts outstanding under the credit agreement.  This credit agreement also supports the Company’s commercial paper program.

Shareholders_Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2013
Shareholders' Equity disclosure
Shareholders' Equity disclosure [Text Block]	8.                          SHAREHOLDERS’ EQUITY
	Share Repurchase Authorization.  The Company’s board of directors has approved common share repurchase authorizations under which repurchases may be made from time to time in the open market, pursuant to pre-set trading plans meeting the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, in private transactions or otherwise.  The authorizations do not have a stated expiration date.  The timing and actual number of shares to be repurchased in the future will depend on a variety of factors, including the Company’s financial position, earnings, share price, catastrophe losses, maintaining capital levels commensurate with the Company’s desired ratings from independent rating agencies, funding of the Company’s qualified pension plan, capital requirements of the Company’s operating subsidiaries, legal requirements, regulatory constraints, other investment opportunities (including mergers and acquisitions and related financings), market conditions and other factors.  During the three months and nine months ended September 30, 2013, the Company repurchased 9.7 million and 17.0 million shares, respectively, under its share repurchase authorization, for a total cost of $800 million and $1.40 billion, respectively.  The average cost per share repurchased was $82.21 and $82.12, respectively.  At September 30, 2013, the Company had $759 million of capacity remaining under the share repurchase authorization.  On October 22, 2013, the board of directors approved a share repurchase authorization that added an additional $5.0 billion of repurchase capacity to the $759 million of capacity remaining at September 30, 2013.
	Shelf Registration Statement.  At the Company’s Annual Meeting of Shareholders held on May 22, 2013, the Company’s shareholders voted to amend the Company’s Articles of Incorporation to provide authority to issue up to five million additional shares of preferred stock.  Subsequent to this amendment of the Company’s Articles of Incorporation, the Company filed a shelf registration statement with the Securities and Exchange Commission in June 2013 pursuant to which it may publicly sell securities, including the new preferred stock, from time to time. The new shelf registration statement replaced the Company’s prior shelf registration statement.

Earnings_per_Share

Earnings per Share	9 Months Ended
	Sep. 30, 2013
Earnings per Share disclosure
Earnings per Share disclosure [Text Block]	9.                       EARNINGS PER SHARE
	The following is a reconciliation of the net income and share data used in the basic and diluted earnings per share computations for the periods presented:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(in millions, except per share amounts)	2013			2012			2013			2012
	Basic and Diluted
	Net income, as reported	$	864		$	864		$	2,685		$	2,169
	Participating share-based awards — allocated income	(6		)	(6		)	(20		)	(17		)
	Net income available to common shareholders — basic and diluted	$	858		$	858		$	2,665		$	2,152
	Common Shares
	Basic
	Weighted average shares outstanding	368.9			384			374.1			388
	Diluted
	Weighted average shares outstanding	368.9			384			374.1			388
	Weighted average effects of dilutive securities — stock options and performance shares	4			3.9			4			3.5
	Total	372.9			387.9			378.1			391.5
	Net Income per Common Share
	Basic	$	2.33		$	2.23		$	7.12		$	5.55
	Diluted	$	2.3		$	2.21		$	7.05		$	5.5

ShareBased_Incentive_Compensat

Share-Based Incentive Compensation	9 Months Ended
	Sep. 30, 2013
Share-Based Incentive Compensation disclosure
Share-Based Incentive Compensation disclosure [Text Block]	10.                               SHARE-BASED INCENTIVE COMPENSATION
	The following information relates to fully vested stock option awards at September 30, 2013:
	Stock Options	Number	Weighted		Weighted	Aggregate
			Average		Average	Intrinsic
			Exercise		Contractual	Value
			Price		Life	($ in millions)
					Remaining
	Vested at end of period (1)	8,470,852	$	52.85	5.7 years	$	270
	Exercisable at end of period	5,594,322	$	47.06	4.4 years	$	211
	(1) Represents awards for which the requisite service has been rendered, including those that are retirement eligible.
	The total compensation cost for all share-based incentive compensation awards recognized in earnings was $29 million and $26 million for the three months ended September 30, 2013 and 2012, respectively, and $99 million and $92 million for the nine months ended September 30, 2013 and 2012, respectively.  The related tax benefits recognized in the consolidated statement of income were $10 million and $9 million for the three months ended September 30, 2013 and 2012, respectively, and $34 million and $32 million for the nine months ended September 30, 2013 and 2012, respectively.
	The total unrecognized compensation cost related to all nonvested share-based incentive compensation awards at September 30, 2013 was $142 million, which is expected to be recognized over a weighted-average period of 1.8 years. The total unrecognized compensation cost related to all nonvested share-based incentive compensation awards at December 31, 2012 was $112 million, which was expected to be recognized over a weighted-average period of 1.7 years.

Pension_Plans_Retirement_Benef

Pension Plans, Retirement Benefits and Savings Plans	9 Months Ended
	Sep. 30, 2013
Pension Plans, Retirement Benefits and Savings Plans disclosure
Pension Plans, Retirement Benefits and Savings Plans disclosure [Text Block]	11.                PENSION PLANS, RETIREMENT BENEFITS AND SAVINGS PLANS
	The following tables summarize the components of net periodic benefit cost for the Company’s pension and postretirement benefit plans recognized in the consolidated statement of income.
	(for the three months ended September 30, in	Pension Plans						Postretirement Benefit Plans
	millions)	2013			2012			2013			2012
	Net Periodic Benefit Cost:
	Service cost	$	30		$	28		$	—		$	—
	Interest cost on benefit obligation	33			34			3			3
	Expected return on plan assets	(52		)	(46		)	—			—
	Amortization of unrecognized:
	Prior service benefit	—			—			(1		)	—
	Net actuarial loss	27			22			—			—
	Net benefit expense	$	38		$	38		$	2		$	3
	(for the nine months ended September 30, in	Pension Plans						Postretirement Benefit Plans
	millions)	2013			2012			2013			2012
	Net Periodic Benefit Cost:
	Service cost	$	89		$	85		$	—		$	—
	Interest cost on benefit obligation	99			103			7			9
	Expected return on plan assets	(156		)	(140		)	—			(1		)
	Amortization of unrecognized:
	Prior service benefit	—			—			(2		)	—
	Net actuarial loss	80			67			—			—
	Net benefit expense	$	112		$	115		$	5		$	8

Contingencies_Commitments_and_

Contingencies, Commitments and Guarantees	9 Months Ended
	Sep. 30, 2013
Contingencies, Commitments and Guarantees disclosure
Contingencies, Commitments and Guarantees disclosure [Text Block]	12.                               CONTINGENCIES, COMMITMENTS AND GUARANTEES
	Contingencies
	The major pending legal proceedings, other than ordinary routine litigation incidental to the business, to which the Company or any of its subsidiaries is a party or to which any of the Company’s properties is subject are described below.
	Asbestos- and Environmental-Related Proceedings
	In the ordinary course of its insurance business, the Company has received and continues to receive claims for insurance arising under policies issued by the Company asserting alleged injuries and damages from asbestos- and environmental-related exposures that are the subject of related coverage litigation, including, among others, the litigation described below.  The Company is defending asbestos- and environmental-related litigation vigorously and believes that it has meritorious defenses; however, the outcomes of these disputes are uncertain.  In this regard, the Company employs dedicated specialists and aggressive resolution strategies to manage asbestos and environmental loss exposure, including settling litigation under appropriate circumstances.
	Asbestos Direct Action Litigation — In October 2001 and April 2002, two purported class action suits (Wise v. Travelers and Meninger v. Travelers) were filed against Travelers Property Casualty Corp. (TPC), a wholly-owned subsidiary of the Company, and other insurers (not including The St. Paul Companies, Inc. (SPC), which was acquired by TPC in 2004) in state court in West Virginia.  These and other cases subsequently filed in West Virginia were consolidated into a single proceeding in the Circuit Court of Kanawha County, West Virginia. The plaintiffs allege that the insurer defendants engaged in unfair trade practices in violation of state statutes by inappropriately handling and settling asbestos claims. The plaintiffs seek to reopen large numbers of settled asbestos claims and to impose liability for damages, including punitive damages, directly on insurers.  Similar lawsuits alleging inappropriate handling and settling of asbestos claims were filed in Massachusetts and Hawaii state courts.  These suits are collectively referred to as the Statutory and Hawaii Actions.
	In March 2002, the plaintiffs in consolidated asbestos actions pending before a mass tort panel of judges in West Virginia state court amended their complaint to include TPC as a defendant, alleging that TPC and other insurers breached alleged duties to certain users of asbestos products.  The plaintiffs seek damages, including punitive damages. Lawsuits seeking similar relief and raising similar allegations, primarily violations of purported common law duties to third parties, have also been asserted in various state courts against TPC and SPC. The claims asserted in these suits are collectively referred to as the Common Law Claims.
	In response to these claims, TPC moved to enjoin the Statutory Actions and the Common Law Claims in the federal bankruptcy court that had presided over the bankruptcy of TPC’s former policyholder Johns-Manville Corporation on the ground that the suits violated injunctions entered in connection with confirmation of the Johns-Manville bankruptcy (the “1986 Orders”).  The bankruptcy court issued a temporary restraining order and referred the parties to mediation.  In November 2003, the parties reached a settlement of the Statutory and Hawaii Actions, which included a lump-sum payment of up to $412 million by TPC, subject to a number of significant contingencies. In May 2004, the parties reached a settlement resolving substantially all pending and similar future Common Law Claims against TPC, which included a payment of up to $90 million by TPC, subject to similar contingencies.  Among the contingencies for each of these settlements was that the bankruptcy court issue an order, which must become a final order, clarifying that all of these claims, and similar future asbestos-related claims against TPC, as well as related contribution claims, are barred by the 1986 Orders.
	On August 17, 2004, the bankruptcy court entered an order approving the settlements and clarifying that the 1986 Orders barred the pending Statutory and Hawaii Actions and substantially all Common Law Claims pending against TPC (the “Clarifying Order”). The Clarifying Order also applies to similar direct action claims that may be filed in the future.  Although the District Court substantially affirmed the Clarifying Order, on February 15, 2008, the Second Circuit issued an opinion vacating on jurisdictional grounds the District Court’s approval of the Clarifying Order.
	On December 12, 2008, the United States Supreme Court granted TPC’s Petition for Writ of Certiorari and, on June 18, 2009, the Supreme Court reversed the Second Circuit’s February 15, 2008 decision, finding, among other things, that the 1986 Orders are final and therefore may not be collaterally challenged on jurisdictional grounds.  The Supreme Court further ruled that the bankruptcy court had jurisdiction to issue the Clarifying Order.  However, since the Second Circuit had not ruled on certain additional issues, principally related to procedural matters and the adequacy of notice provided to certain parties, the Supreme Court remanded the case to the Second Circuit for further proceedings on those specific issues.
	On March 22, 2010, the Second Circuit issued an opinion in which it found that the notice of the 1986 Orders provided to one remaining objector was insufficient to bar contribution claims by that objector against TPC. TPC’s Petition for Rehearing and Rehearing En Banc was denied May 25, 2010 and its Petition for Writ of Certiorari and Petition for a Writ of Mandamus were denied by the United States Supreme Court on November 29, 2010.
	The plaintiffs in the Statutory and Hawaii actions and the Common Law Claims actions thereafter filed motions in the bankruptcy court to compel TPC to make payment under the settlement agreements, arguing that all conditions precedent to the settlements had been met.  On December 16, 2010, the bankruptcy court granted the plaintiffs’ motions and ruled that TPC was required to fund the settlements.  The court entered judgment against TPC on January 20, 2011 in accordance with this ruling and ordered TPC to pay the settlement amounts plus prejudgment interest.  The bankruptcy court’s judgment was reversed by the district court on March 1, 2012, the district court having found that the conditions to the settlements had not been met in view of the Second Circuit’s March 22, 2010 ruling permitting the filing of contribution claims against TPC.  The plaintiffs appealed the district court’s March 1, 2012 decision to the Second Circuit Court of Appeals.  Oral argument before the Second Circuit took place on January 10, 2013, and the parties await the court’s decision.
	SPC, which is not covered by the Manville bankruptcy court rulings or the settlements described above, from time to time has been named as a defendant in direct action cases in Texas state court asserting common law claims.  All such cases that are still pending and in which SPC has been served are currently on the inactive docket in Texas state court.  If any of those cases becomes active, SPC intends to litigate those cases vigorously.  SPC was previously a defendant in similar direct actions in Ohio state court, which have been dismissed following favorable rulings by Ohio trial and appellate courts.  From time to time, SPC and/or its subsidiaries have been named in similar individual direct actions in other jurisdictions.
	Outcome and Impact of Asbestos and Environmental Claims and Litigation.  Currently, it is not possible to predict legal outcomes and their impact on the future development of claims and litigation relating to asbestos and environmental claims. Any such development will be affected by future court decisions and interpretations, as well as changes in applicable legislation. Because of these uncertainties, additional liabilities may arise for amounts in excess of the Company’s current reserves. In addition, the Company’s estimate of ultimate claims and claim adjustment expenses may change. These additional liabilities or increases in estimates, or a range of either, cannot now be reasonably estimated and could result in income statement charges that could be material to the Company’s results of operations in future periods.
	Other Proceedings Not Arising Under Insurance Contracts or Reinsurance Agreements
	The Company is involved in other lawsuits, including lawsuits alleging extra-contractual damages relating to insurance contracts or reinsurance agreements, that do not arise under insurance contracts or reinsurance agreements.  Based upon currently available information, the Company does not believe it is reasonably possible that any such lawsuit or related lawsuits would be material to the Company’s results of operations or have a material adverse effect on the Company’s financial position or liquidity.
	Gain Contingencies
	On August 17, 2010, in a reinsurance dispute in New York state court captioned United States Fidelity & Guaranty Company v. American Re-Insurance Company, et al., the trial court granted summary judgment for United States Fidelity and Guaranty Company (USF&G), a subsidiary of the Company, and denied summary judgment for American Re-Insurance Company, a subsidiary of Munich Re (American Re), and three other reinsurers.  By order dated October 22, 2010, the trial court corrected certain clerical errors and made certain clarifications to the August 17, 2010 order.  On October 25, 2010, judgment was entered against American Re and the other three insurers, awarding USF&G $420 million, comprising $251 million ceded under the terms of the disputed reinsurance contract plus interest of 9% amounting to $169 million as of that date.  The judgment, including the award of interest, was appealed by the reinsurers to the New York Supreme Court, Appellate Division, First Department.  On January 24, 2012, the Appellate Division affirmed the judgment.  On January 30, 2012, the reinsurers filed a motion with the Appellate Division seeking permission to appeal its decision to the New York Court of Appeals, and on March 12, 2012, the Appellate Division granted the reinsurers’ motion.  On February 7, 2013, the Court of Appeals issued an opinion that largely affirmed the summary judgment in USF&G’s favor, while modifying in part the summary judgment with respect to two discrete issues and remanding the case to the trial court for determination of those issues.  The Company believes it has a meritorious position on each of these issues and intends to pursue its claim vigorously.  On May 2, 2013, the Court of Appeals denied a motion by reinsurers to reconsider the February 7, 2013 opinion.  At September 30, 2013, the claim totaled $487 million, comprising the $251 million of reinsurance recoverable plus interest amounting to $236 million as of that date.  Interest will continue to accrue at 9% until the claim is paid. The $251 million of reinsurance recoverable owed to USF&G under the terms of the disputed reinsurance contract has been reported as part of reinsurance recoverables in the Company’s consolidated balance sheet.  The interest that would be owed as part of any judgment ultimately entered in favor of USF&G is treated for accounting purposes as a gain contingency in accordance with FASB Topic 450, Contingencies, and accordingly has not been recognized in the Company’s consolidated financial statements.
	In an unrelated action, The Travelers Indemnity Company is one of the Settlement Class plaintiffs and a class member in a class action lawsuit captioned Safeco Insurance Company of America, et al. v American International Group, Inc. et al. (U.S. District Court, N.D. Ill.) in which the defendants are alleged to have engaged in the under-reporting of workers’ compensation premium in connection with a workers’ compensation reinsurance pool in which several subsidiaries of the Company participate.  On July 26, 2011, the court granted preliminary approval of a class settlement pursuant to which the defendants agreed to pay $450 million to the class.  On December 21, 2011, the court entered an order granting final approval of the settlement, and on February 28, 2012, the district court issued a written opinion approving the settlement.  On March 27, 2012, three parties who objected to the settlement appealed the court’s orders approving the settlement to the U.S. Court of Appeals for the Seventh Circuit.  On January 11, 2013, all parties, including the three parties who had objected to the settlement, filed a Stipulation of Dismissal indicating that there were no longer any objections to the settlement.  On March 25, 2013, the Seventh Circuit dismissed the appeals.  On April 16, 2013, the Seventh Circuit issued its mandate returning the case to the district court for administration of the settlement.  Prior to receiving payment, the Company accounted for its anticipated allocation from the settlement fund as a gain contingency in accordance with FASB Topic 450, Contingencies.  On June 26, 2013, the Company received payment of approximately $91 million, comprising 98% of its allocation from the settlement fund. The Company anticipates receiving payment of the remaining 2% (approximately $2 million, less any additional fees and expenses to be paid from the settlement fund), prior to December 31, 2013.  The $91 million received by the Company in June 2013 was recorded as a gain and is reported in “Other revenues” in the consolidated statement of income in the Company’s consolidated financial statements.
	Other Commitments and Guarantees
	Commitments
	Investment Commitments — The Company has unfunded commitments to private equity limited partnerships and real estate partnerships in which it invests.  These commitments totaled $1.48 billion and $1.27 billion at September 30, 2013 and December 31, 2012, respectively.
	Guarantees
	In the ordinary course of selling businesses to third parties, the Company has agreed to indemnify purchasers for losses arising out of breaches of representations and warranties with respect to the businesses being sold, covenants and obligations of the Company and/or its subsidiaries following the closing, and in certain cases obligations arising from undisclosed liabilities, adverse reserve development, imposition of additional taxes due to either a change in the tax law or an adverse interpretation of the tax law, or certain named litigation.  Such indemnification provisions generally survive for periods ranging from 18 months following the applicable closing date to the expiration of the relevant statutes of limitations, although, in some cases, there may be other agreed upon term limitations or no term limitations.  Certain of these contingent obligations are subject to deductibles which have to be incurred by the obligee before the Company is obligated to make payments.  The maximum amount of the Company’s contingent obligation for indemnifications related to the sale of businesses that are quantifiable was $474 million at September 30, 2013, of which $9 million was recognized on the balance sheet at that date.
	The Company also has contingent obligations for guarantees related to certain investments, third-party loans related to certain investments, certain insurance policy obligations of former insurance subsidiaries, and various other indemnifications.  The Company also provides standard indemnifications to service providers in the normal course of business.  The indemnification clauses are often standard contractual terms.  Certain of these guarantees and indemnifications have no stated or notional amounts or limitation to the maximum potential future payments, and, accordingly, the Company is unable to develop an estimate of the maximum potential payments for such arrangements.  The maximum amount of the Company’s obligation for guarantees of certain investments and third-party loans related to certain investments that are quantifiable was $129 million at September 30, 2013, approximately $63 million of which is indemnified by a third party.  The maximum amount of the Company’s obligation related to the guarantee of certain insurance policy obligations of a former insurance subsidiary was $480 million at September 30, 2013, all of which is indemnified by a third party.

Consolidating_Financial_Statem

Consolidating Financial Statements (Unaudited)	9 Months Ended
	Sep. 30, 2013
Consolidating Financial Statements of The Travelers Companies, Inc. and Subsidiaries (Unaudited) disclosure
Consolidating Financial Statements of The Travelers Companies, Inc. and Subsidiaries (Unaudited) disclosure [Text Block]	13.                                 CONSOLIDATING FINANCIAL STATEMENTS OF THE TRAVELERS COMPANIES, INC. AND SUBSIDIARIES
	The following consolidating financial statements of the Company have been prepared pursuant to Rule 3-10 of Regulation S-X. These consolidating financial statements have been prepared from the Company’s financial information on the same basis of accounting as the consolidated financial statements. The Travelers Companies, Inc. has fully and unconditionally guaranteed certain debt obligations of TPC, which totaled $700 million at September 30, 2013.
	Prior to the merger of TPC and SPC in 2004, TPC fully and unconditionally guaranteed the payment of all principal, premiums, if any, and interest on certain debt obligations of its wholly-owned subsidiary, Travelers Insurance Group Holdings, Inc. (TIGHI). Concurrent with the merger, The Travelers Companies, Inc. fully and unconditionally assumed such guarantee obligations of TPC. TPC is deemed to have no assets or operations independent of TIGHI. Consolidating financial information for TIGHI has not been presented herein because such financial information would be substantially the same as the financial information provided for TPC.
	In connection with the planned acquisition of The Dominion of Canada General Insurance Company from E-L Financial Corporation Limited (E-L Financial), The Travelers Companies, Inc. (TRV) provided an unconditional guarantee to E-L Financial of a TRV subsidiary’s obligation for the full and prompt payment of the purchase price when due and the performance of all agreements, covenants, and obligations under the agreement. See Financial, Professional & International Insurance in note 1 to the Company’s consolidated financial statements for further information regarding the transaction.
	CONSOLIDATING STATEMENT OF INCOME (Unaudited)
	For the three months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Revenues
	Premiums	$	3,839		$	1,827		$	—		$	—		$	5,666
	Net investment income	438			217			2			—			657
	Fee income	106			1			—			—			107
	Net realized investment gains (losses) (1)	3			(25		)	—			—			(22		)
	Other revenues	38			6			—			—			44
	Total revenues	4,424			2,026			2			—			6,452
	Claims and expenses
	Claims and claim adjustment expenses	2,214			1,083			—			—			3,297
	Amortization of deferred acquisition costs	640			313			—			—			953
	General and administrative expenses	646			286			2			—			934
	Interest expense	12			—			79			—			91
	Total claims and expenses	3,512			1,682			81			—			5,275
	Income (loss) before income taxes	912			344			(79		)	—			1,177
	Income tax expense (benefit)	248			93			(28		)	—			313
	Net income of subsidiaries	—			—			915			(915		)	—
	Net income	$	664		$	251		$	864		$	(915	)	$	864
	(1)       Total other-than-temporary impairment (OTTI) for the three months ended September 30, 2013, and the amounts comprising total OTTI that were recognized in net realized investment gains (losses) and in other comprehensive income (OCI) were as follows:
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Total OTTI gains (losses)	$	1		$	(1	)	$	—		$	—		$	—
	OTTI losses recognized in net realized investment gains	$	(2	)	$	(1	)	$	—		$	—		$	(3	)
	OTTI gains recognized in OCI	$	3		$	—		$	—		$	—		$	3
	(2)       The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF INCOME (Unaudited)
	For the three months ended September 30, 2012
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Revenues
	Premiums	$	3,845		$	1,821		$	—		$	—		$	5,666
	Net investment income	443			277			2			—			722
	Fee income	92			—			—			—			92
	Net realized investment gains (losses) (1)	2			(4		)	—			—			(2		)
	Other revenues	21			13			—			—			34
	Total revenues	4,403			2,107			2			—			6,512
	Claims and expenses
	Claims and claim adjustment expenses	2,292			1,067			—			—			3,359
	Amortization of deferred acquisition costs	660			326			—			—			986
	General and administrative expenses	622			284			(2		)	—			904
	Interest expense	19			—			74			—			93
	Total claims and expenses	3,593			1,677			72			—			5,342
	Income (loss) before income taxes	810			430			(70		)	—			1,170
	Income tax expense (benefit)	212			120			(26		)	—			306
	Net income of subsidiaries	—			—			908			(908		)	—
	Net income	$	598		$	310		$	864		$	(908	)	$	864
	(1)       Total other-than-temporary impairment (OTTI) for the three months ended September 30, 2012, and the amounts comprising total OTTI that were recognized in net realized investment gains (losses) and in other comprehensive income (OCI) were as follows:
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Total OTTI gains	$	15		$	2		$	—		$	—		$	17
	OTTI losses recognized in net realized investment gains (losses)	$	(2	)	$	(1	)	$	—		$	—		$	(3	)
	OTTI gains recognized in OCI	$	17		$	3		$	—		$	—		$	20
	(2)       The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF INCOME (Unaudited)
	For the nine months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
Revenues
Premiums	$	11,384		$	5,402		$	—		$	—		$	16,786
Net investment income	1,350			659			5			—			2,014
Fee income	284			2			—			—			286
Net realized investment gains (1)	120			34			1			—			155
Other revenues	170			43			—			—			213
Total revenues	13,308			6,140			6			—			19,454
Claims and expenses
Claims and claim adjustment expenses	6,684			3,296			—			—			9,980
Amortization of deferred acquisition costs	1,912			939			—			—			2,851
General and administrative expenses	1,915			861			4			—			2,780
Interest expense	41			—			228			—			269
Total claims and expenses	10,552			5,096			232			—			15,880
Income (loss) before income taxes	2,756			1,044			(226		)	—			3,574
Income tax expense (benefit)	700			269			(80		)	—			889
Net income of subsidiaries	—			—			2,831			(2,831		)	—
Net income	$	2,056		$	775		$	2,685		$	(2,831	)	$	2,685
(1)       Total other-than-temporary impairment (OTTI) for the nine months ended September 30, 2013, and the amounts comprising total OTTI that were recognized in net realized investment gains and in other comprehensive income (OCI) were as follows:
(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
				Subsidiaries
Total OTTI gains (losses)	$	(3	)	$	2		$	—		$	—		$	(1	)
OTTI losses recognized in net realized investment gains	$	(7	)	$	(3	)	$	—		$	—		$	(10	)
OTTI gains recognized in OCI	$	4		$	5		$	—		$	—		$	9
(2)       The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF INCOME (Unaudited)
For the nine months ended September 30, 2012
(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
				Subsidiaries
Revenues
Premiums	$	11,333		$	5,385		$	—		$	—		$	16,718
Net investment income	1,444			750			6			—			2,200
Fee income	232			1			—			—			233
Net realized investment gains (losses) (1)	17			(5		)	—			—			12
Other revenues	70			30			—			—			100
Total revenues	13,096			6,161			6			—			19,263
Claims and expenses
Claims and claim adjustment expenses	7,113			3,396			—			—			10,509
Amortization of deferred acquisition costs	1,953			980			—			—			2,933
General and administrative expenses	1,829			850			2			—			2,681
Interest expense	55			—			230			—			285
Total claims and expenses	10,950			5,226			232			—			16,408
Income (loss) before income taxes	2,146			935			(226		)	—			2,855
Income tax expense (benefit)	536			231			(81		)	—			686
Net income of subsidiaries	—			—			2,314			(2,314		)	—
Net income	$	1,610		$	704		$	2,169		$	(2,314	)	$	2,169
(1)       Total other-than-temporary impairment (OTTI) for the nine months ended September 30, 2012, and the amounts comprising total OTTI that were recognized in net realized investment gains (losses) and in other comprehensive income (OCI) were as follows:
(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
				Subsidiaries
Total OTTI gains	$	15		$	13		$	—		$	—		$	28
OTTI losses recognized in net realized investment gains (losses)	$	(8	)	$	(3	)	$	—		$	—		$	(11	)
OTTI gains recognized in OCI	$	23		$	16		$	—		$	—		$	39
(2)       The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
For the three months ended September 30, 2013
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Net income	$	664		$	251		$	864		$	(915	)	$	864
Other comprehensive income (loss):
Changes in net unrealized gains on investment securities:
Having no credit losses recognized in the consolidated statement of income	(138		)	(71		)	5			—			(204		)
Having credit losses recognized in the consolidated statement of income	(1		)	(1		)	—			—			(2		)
Net changes in benefit plan assets and obligations	—			(1		)	25			—			24
Net changes in unrealized foreign currency translation	26			86			—			—			112
Other comprehensive income (loss) before income taxes and other comprehensive loss of subsidiaries	(113		)	13			30			—			(70		)
Income tax expense (benefit)	(46		)	(20		)	11			—			(55		)
Other comprehensive income (loss), net of taxes, before other comprehensive loss of subsidiaries	(67		)	33			19			—			(15		)
Other comprehensive loss of subsidiaries	—			—			(34		)	34			—
Other comprehensive income (loss)	(67		)	33			(15		)	34			(15		)
Comprehensive income	$	597		$	284		$	849		$	(881	)	$	849
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
For the three months ended September 30, 2012
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Net income	$	598		$	310		$	864		$	(908	)	$	864
Other comprehensive income:
Changes in net unrealized gains on investment securities:
Having no credit losses recognized in the consolidated statement of income	338			127			5			—			470
Having credit losses recognized in the consolidated statement of income	28			13			—			—			41
Net changes in benefit plan assets and obligations	1			—			21			—			22
Net changes in unrealized foreign currency translation	13			52			—			—			65
Other comprehensive income before income taxes and other comprehensive income of subsidiaries	380			192			26			—			598
Income tax expense	129			54			9			—			192
Other comprehensive income net of taxes, before other comprehensive income of subsidiaries	251			138			17			—			406
Other comprehensive income of subsidiaries	—			—			389			(389		)	—
Other comprehensive income	251			138			406			(389		)	406
Comprehensive income	$	849		$	448		$	1,270		$	(1,297	)	$	1,270
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
For the nine months ended September 30, 2013
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Net income	$	2,056		$	775		$	2,685		$	(2,831	)	$	2,685
Other comprehensive income (loss):
Changes in net unrealized gains on investment securities:
Having no credit losses recognized in the consolidated statement of income	(1,735		)	(647		)	12			—			(2,370		)
Having credit losses recognized in the consolidated statement of income	4			(2		)	—			—			2
Net changes in benefit plan assets and obligations	1			2			75			—			78
Net changes in unrealized foreign currency translation	(35		)	(22		)	—			—			(57		)
Other comprehensive income (loss) before income taxes and other comprehensive loss of subsidiaries	(1,765		)	(669		)	87			—			(2,347		)
Income tax expense (benefit)	(616		)	(231		)	31			—			(816		)
Other comprehensive income (loss), net of taxes, before other comprehensive loss of subsidiaries	(1,149		)	(438		)	56			—			(1,531		)
Other comprehensive loss of subsidiaries	—			—			(1,587		)	1,587			—
Other comprehensive loss	(1,149		)	(438		)	(1,531		)	1,587			(1,531		)
Comprehensive income	$	907		$	337		$	1,154		$	(1,244	)	$	1,154
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
For the nine months ended September 30, 2012
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Net income	$	1,610		$	704		$	2,169		$	(2,314	)	$	2,169
Other comprehensive income:
Changes in net unrealized gains on investment securities:
Having no credit losses recognized in the consolidated statement of income	451			147			11			—			609
Having credit losses recognized in the consolidated statement of income	49			22			—			—			71
Net changes in benefit plan assets and obligations	1			—			63			—			64
Net changes in unrealized foreign currency translation	(20		)	63			—			—			43
Other comprehensive income before income taxes and other comprehensive income of subsidiaries	481			232			74			—			787
Income tax expense	165			65			26			—			256
Other comprehensive income, net of taxes, before other comprehensive income of subsidiaries	316			167			48			—			531
Other comprehensive income of subsidiaries	—			—			483			(483		)	—
Other comprehensive income	316			167			531			(483		)	531
Comprehensive income	$	1,926		$	871		$	2,700		$	(2,797	)	$	2,700
(1)         The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING BALANCE SHEET (Unaudited)
At September 30, 2013
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Assets
Fixed maturities, available for sale, at fair value (amortized cost $59,960)	$	42,493		$	19,572		$	37		$	—		$	62,102
Equity securities, available for sale, at fair value (cost $470)	159			428			121			—			708
Real estate investments	32			885			—			—			917
Short-term securities	2,750			833			1,796			—			5,379
Other investments	2,437			987			1			—			3,425
Total investments	47,871			22,705			1,955			—			72,531
Cash	130			163			2			—			295
Investment income accrued	457			210			6			—			673
Premiums receivable	4,107			2,006			—			—			6,113
Reinsurance recoverables	6,153			3,391			—			—			9,544
Ceded unearned premiums	858			157			—			—			1,015
Deferred acquisition costs	1,578			224			—			—			1,802
Deferred taxes	159			55			107			—			321
Contractholder receivables	3,253			1,197			—			—			4,450
Goodwill	2,411			954			—			—			3,365
Other intangible assets	245			102			—			—			347
Investment in subsidiaries	—			—			28,835			(28,835		)	—
Other assets	1,882			327			20			—			2,229
Total assets	$	69,104		$	31,491		$	30,925		$	(28,835	)	$	102,685
Liabilities
Claims and claim adjustment expense reserves	$	32,232		$	16,921		$	—		$	—		$	49,153
Unearned premium reserves	8,136			3,580			—			—			11,716
Contractholder payables	3,253			1,197			—			—			4,450
Payables for reinsurance premiums	219			219			—			—			438
Debt	692			—			5,654			—			6,346
Other liabilities	4,106			1,195			470			—			5,771
Total liabilities	48,638			23,112			6,124			—			77,874
Shareholders’ equity
Common stock (1,750.0 shares authorized; 364.1 shares issued and outstanding)	—			390			21,425			(390		)	21,425
Additional paid-in capital	11,635			6,501			—			(18,136		)	—
Retained earnings	7,873			1,003			23,475			(8,866		)	23,485
Accumulated other comprehensive income	958			485			705			(1,443		)	705
Treasury stock, at cost (390.1 shares)	—			—			(20,804		)	—			(20,804		)
Total shareholders’ equity	20,466			8,379			24,801			(28,835		)	24,811
Total liabilities and shareholders’ equity	$	69,104		$	31,491		$	30,925		$	(28,835	)	$	102,685
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING BALANCE SHEET (Unaudited)
At December 31, 2012
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Assets
Fixed maturities, available for sale, at fair value (amortized cost $60,829)	$	44,336		$	21,019		$	38		$	—		$	65,393
Equity securities, available for sale, at fair value (cost $462)	153			386			106			—			645
Real estate investments	33			850			—			—			883
Short-term securities	1,187			338			1,958			—			3,483
Other investments	2,443			990			1			—			3,434
Total investments	48,152			23,583			2,103			—			73,838
Cash	177			151			2			—			330
Investment income accrued	507			240			5			—			752
Premiums receivable	3,944			1,928			—			—			5,872
Reinsurance recoverables	7,112			3,600			—			—			10,712
Ceded unearned premiums	698			158			—			—			856
Deferred acquisition costs	1,560			232			—			—			1,792
Contractholder receivables	3,540			1,266			—			—			4,806
Goodwill	2,411			954			—			—			3,365
Other intangible assets	268			113			—			—			381
Investment in subsidiaries	—			—			28,562			(28,562		)	—
Other assets	1,930			286			18			—			2,234
Total assets	$	70,299		$	32,511		$	30,690		$	(28,562	)	$	104,938
Liabilities
Claims and claim adjustment expense reserves	$	33,598		$	17,324		$	—		$	—		$	50,922
Unearned premium reserves	7,751			3,490			—			—			11,241
Contractholder payables	3,540			1,266			—			—			4,806
Payables for reinsurance premiums	151			195			—			—			346
Deferred taxes	316			123			(101		)	—			338
Debt	1,191			—			5,159			—			6,350
Other liabilities	4,107			1,186			237			—			5,530
Total liabilities	50,654			23,584			5,295			—			79,533
Shareholders’ equity
Common stock (1,750.0 shares authorized; 377.4 shares issued and outstanding)	—			390			21,161			(390		)	21,161
Additional paid-in capital	11,135			6,501			—			(17,636		)	—
Retained earnings	6,404			1,113			21,342			(7,507		)	21,352
Accumulated other comprehensive income	2,106			923			2,236			(3,029		)	2,236
Treasury stock, at cost (372.3 shares)	—			—			(19,344		)	—			(19,344		)
Total shareholders’ equity	19,645			8,927			25,395			(28,562		)	25,405
Total liabilities and shareholders’ equity	$	70,299		$	32,511		$	30,690		$	(28,562	)	$	104,938
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited)
For the nine months ended September 30, 2013
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Cash flows from operating activities
Net income	$	2,056		$	775		$	2,685		$	(2,831	)	$	2,685
Net adjustments to reconcile net income to net cash provided by operating activities	(348		)	224			(1,531		)	1,859			204
Net cash provided by operating activities	1,708			999			1,154			(972		)	2,889
Cash flows from investing activities
Proceeds from maturities of fixed maturities	4,096			1,820			1			—			5,917
Proceeds from sales of investments:
Fixed maturities	590			565			5			—			1,160
Equity securities	21			36			—			—			57
Other investments	337			208			—			—			545
Purchases of investments:
Fixed maturities	(4,339		)	(2,146		)	(7		)	—			(6,492		)
Equity securities	(20		)	(29		)	(1		)	—			(50		)
Real estate investments	—			(65		)	—			—			(65		)
Other investments	(222		)	(90		)	—			—			(312		)
Net sales (purchases) of short-term securities	(1,563		)	(492		)	162			—			(1,893		)
Securities transactions in course of settlement	182			98			—			—			280
Other	(250		)	(4		)	—			—			(254		)
Net cash provided by (used in) investing activities	(1,168		)	(99		)	160			—			(1,107		)
Cash flows from financing activities
Payment of debt	(500		)	—			—			—			(500		)
Issuance of debt	—			—			494			—			494
Dividends paid to shareholders	—			—			(549		)	—			(549		)
Issuance of common stock — employee share options	—			—			158			—			158
Treasury stock acquired — share repurchase authorization	—			—			(1,400		)	—			(1,400		)
Treasury stock acquired — net employee share-based compensation	—			—			(60		)	—			(60		)
Excess tax benefits from share-based payment arrangements	—			—			43			—			43
Capital contributions	500			—			—			(500		)	—
Dividends paid to parent company	(587		)	(885		)	—			1,472			—
Net cash used in financing activities	(587		)	(885		)	(1,314		)	972			(1,814		)
Effect of exchange rate changes on cash	—			(3		)	—			—			(3		)
Net increase (decrease) in cash	(47		)	12			—			—			(35		)
Cash at beginning of year	177			151			2			—			330
Cash at end of period	$	130		$	163		$	2		$	—		$	295
Supplemental disclosure of cash flow information
Income taxes paid (received)	$	691		$	236		$	(203	)	$	—		$	724
Interest paid	$	52		$	—		$	154		$	—		$	206
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited)
For the nine months ended September 30, 2012
(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
				Subsidiaries
Cash flows from operating activities
Net income	$	1,610		$	704		$	2,169		$	(2,314	)	$	2,169
Net adjustments to reconcile net income to net cash provided by operating activities	552			(136		)	(921		)	1,102			597
Net cash provided by operating activities	2,162			568			1,248			(1,212		)	2,766
Cash flows from investing activities
Proceeds from maturities of fixed maturities	4,123			1,731			1			—			5,855
Proceeds from sales of investments:
Fixed maturities	494			228			2			—			724
Equity securities	18			13			—			—			31
Real estate investments	—			3			—			—			3
Other investments	389			127			—			—			516
Purchases of investments:
Fixed maturities	(5,645		)	(2,023		)	(9		)	—			(7,677		)
Equity securities	(1		)	(37		)	(1		)	—			(39		)
Real estate investments	—			(62		)	—			—			(62		)
Other investments	(187		)	(105		)	—			—			(292		)
Net sales (purchases) of short-term securities	(306		)	(99		)	364			—			(41		)
Securities transactions in course of settlement	46			7			—			—			53
Other	(235		)	6			—			—			(229		)
Net cash provided by (used in) investing activities	(1,304		)	(211		)	357			—			(1,158		)
Cash flows from financing activities
Payment of debt	—			—			(258		)	—			(258		)
Dividends paid to shareholders	—			—			(519		)	—			(519		)
Issuance of common stock — employee share options	—			—			247			—			247
Treasury stock acquired — share repurchase authorization	—			—			(1,056		)	—			(1,056		)
Treasury stock acquired — net employee share-based compensation	—			—			(52		)	—			(52		)
Excess tax benefits from share-based payment arrangements	—			—			32			—			32
Dividends paid to parent company	(854		)	(358		)	—			1,212			—
Net cash used in financing activities	(854		)	(358		)	(1,606		)	1,212			(1,606		)
Effect of exchange rate changes on cash	—			4			—			—			4
Net increase (decrease) in cash	4			3			(1		)	—			6
Cash at beginning of year	114			98			2			—			214
Cash at end of period	$	118		$	101		$	1		$	—		$	220
Supplemental disclosure of cash flow information
Income taxes paid (received)	$	343		$	110		$	(143	)	$	—		$	310
Interest paid	$	65		$	—		$	161		$	—		$	226
(1)      The Travelers Companies, Inc., excluding its subsidiaries.

Basis_of_Presentation_and_Acco1

Basis of Presentation and Accounting Policies (policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies disclosure
Accounting Policies, Basis of Presentation [Policy Text Block]	Basis of Presentation
	The interim consolidated financial statements include the accounts of The Travelers Companies, Inc. (together with its subsidiaries, the Company). These financial statements are prepared in conformity with U.S. generally accepted accounting principles (GAAP) and are unaudited.  In the opinion of the Company’s management, all adjustments necessary for a fair presentation have been reflected.  Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been omitted.  All material intercompany transactions and balances have been eliminated.  The accompanying interim consolidated financial statements and related notes should be read in conjunction with the Company’s consolidated financial statements and related notes included in the Company’s 2012 Annual Report on Form 10-K.
	The preparation of the interim consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the interim consolidated financial statements and the reported amounts of revenues and claims and expenses during the reporting period.  Actual results could differ from those estimates.
Accounting Policies, Adoption of Accounting Standards Updates [Policy Text Block]	Adoption of Accounting Standards Updates
	Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income
	In February 2013, the Financial Accounting Standards Board (FASB) issued updated guidance to improve the reporting of reclassifications out of accumulated other comprehensive income. The guidance requires an entity to present, either on the face of the statement of income or in the notes, separately for each component of comprehensive income, the current period reclassifications out of accumulated other comprehensive income by the respective line items of net income affected by the reclassification.
	The updated guidance is effective prospectively for reporting periods beginning after December 15, 2012. The Company adopted the updated guidance effective March 31, 2013, and such adoption did not have any effect on the Company’s results of operations, financial position or liquidity.

Segment_Information_tables

Segment Information (tables)	9 Months Ended
	Sep. 30, 2013
Segment Information disclosure
Company's revenues and operating income by segment [Table Text Block]
	(for the three months	Business			Financial,			Personal			Total
	ended September 30,	Insurance			Professional &			Insurance			Reportable
	in millions)				International						Segments
					Insurance
	2013
	Premiums	$	3,046		$	785		$	1,835		$	5,666
	Net investment income	479			88			90			657
	Fee income	106			1			—			107
	Other revenues	8			5			34			47
	Total operating revenues (1)	$	3,639		$	879		$	1,959		$	6,477
	Operating income (1)	$	526		$	160		$	262		$	948
	2012
	Premiums	$	2,982		$	772		$	1,912		$	5,666
	Net investment income	524			97			101			722
	Fee income	92			—			—			92
	Other revenues	9			8			17			34
	Total operating revenues (1)	$	3,607		$	877		$	2,030		$	6,514
	Operating income (1)	$	543		$	180		$	206		$	929
	(1)                  Operating revenues for reportable business segments exclude net realized investment gains (losses). Operating income for reportable business segments equals net income excluding the after-tax impact of net realized investment gains (losses).
	(for the nine months	Business			Financial,			Personal			Total
	ended September 30,	Insurance			Professional &			Insurance			Reportable
	in millions)				International						Segments
					Insurance
	2013
	Premiums	$	9,006		$	2,271		$	5,509		$	16,786
	Net investment income	1,468			271			275			2,014
	Fee income	285			1			—			286
	Other revenues	135			15			67			217
	Total operating revenues (1)	$	10,894		$	2,558		$	5,851		$	19,303
	Operating income (1)	$	1,695		$	477		$	601		$	2,773
	2012
	Premiums	$	8,718		$	2,275		$	5,725		$	16,718
	Net investment income	1,592			300			308			2,200
	Fee income	232			1			—			233
	Other revenues	31			21			52			104
	Total operating revenues (1)	$	10,573		$	2,597		$	6,085		$	19,255
	Operating income (1)	$	1,517		$	511		$	331		$	2,359
	(1)                  Operating revenues for reportable business segments exclude net realized investment gains (losses). Operating income for reportable business segments equals net income excluding the after-tax impact of net realized investment gains (losses).
Business segment reconciliations of revenue and income, net of tax [Table Text Block]
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(in millions)	2013			2012			2013			2012
	Revenue reconciliation
	Earned premiums
	Business Insurance:
	Workers’ compensation	$	896		$	841		$	2,640		$	2,378
	Commercial automobile	476			488			1,425			1,462
	Commercial property	432			414			1,259			1,207
	General liability	452			444			1,333			1,313
	Commercial multi-peril	779			785			2,320			2,333
	Other	11			10			29			25
	Total Business Insurance	3,046			2,982			9,006			8,718
	Financial, Professional & International Insurance:
	Fidelity and surety	235			240			683			699
	General liability	227			216			661			633
	International	279			274			795			818
	Other	44			42			132			125
	Total Financial, Professional & International Insurance	785			772			2,271			2,275
	Personal Insurance:
	Automobile	855			916			2,591			2,762
	Homeowners and other	980			996			2,918			2,963
	Total Personal Insurance	1,835			1,912			5,509			5,725
	Total earned premiums	5,666			5,666			16,786			16,718
	Net investment income	657			722			2,014			2,200
	Fee income	107			92			286			233
	Other revenues	47			34			217			104
	Total operating revenues for reportable segments	6,477			6,514			19,303			19,255
	Other revenues	(3		)	—			(4		)	(4		)
	Net realized investment gains (losses)	(22		)	(2		)	155			12
	Total consolidated revenues	$	6,452		$	6,512		$	19,454		$	19,263
	Income reconciliation, net of tax
	Total operating income for reportable segments	$	948		$	929		$	2,773		$	2,359
	Interest Expense and Other (1)	(65		)	(62		)	(187		)	(196		)
	Total operating income	883			867			2,586			2,163
	Net realized investment gains (losses)	(19		)	(3		)	99			6
	Total consolidated net income	$	864		$	864		$	2,685		$	2,169
	(1)                   The primary component of Interest Expense and Other is after-tax interest expense of $59 million and $60 million in the three months ended September 30, 2013 and 2012, respectively, and $175 million and $185 million in the nine months ended September 30, 2013 and 2012, respectively.
Asset reconciliation [Table Text Block]
	(in millions)	September 30,			December 31,
		2013			2012
	Asset reconciliation:
	Business Insurance	$	74,931		$	76,972
	Financial, Professional & International Insurance	14,084			13,452
	Personal Insurance	13,173			14,195
	Total assets for reportable segments	102,188			104,619
	Other assets (1)	497			319
	Total consolidated assets	$	102,685		$	104,938
	(1)                   The primary components of other assets at September 30, 2013 were deferred taxes and other intangible assets.  The primary component of other assets at December 31, 2012 was other intangible assets.

Investments_tables

Investments (tables)	9 Months Ended
	Sep. 30, 2013
Investments disclosure
Amortized cost and fair value of investments in fixed maturities [Table Text Block]
		Amortized		Gross Unrealized				Fair
	(at September 30, 2013, in millions)	Cost		Gains		Losses		Value
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,069	$	48	$	8	$	2,109
	Obligations of states, municipalities and political subdivisions:
	Pre-refunded	9,141		489		1		9,629
	All other	25,817		1,137		333		26,621
	Total obligations of states, municipalities and political subdivisions	34,958		1,626		334		36,250
	Debt securities issued by foreign governments	1,937		40		3		1,974
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,337		191		12		2,516
	All other corporate bonds	18,633		833		245		19,221
	Redeemable preferred stock	26		6		—		32
	Total	$	59,960	$	2,744	$	602	$	62,102
		Amortized		Gross Unrealized				Fair
	(at December 31, 2012, in millions)	Cost		Gains		Losses		Value
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,148	$	75	$	1	$	2,222
	Obligations of states, municipalities and political subdivisions:
	Pre-refunded	8,458		567		—		9,025
	All other	27,405		2,262		11		29,656
	Total obligations of states, municipalities and political subdivisions	35,863		2,829		11		38,681
	Debt securities issued by foreign governments	2,185		72		—		2,257
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,744		255		2		2,997
	All other corporate bonds	17,863		1,360		20		19,203
	Redeemable preferred stock	26		7		—		33
	Total	$	60,829	$	4,598	$	34	$	65,393
Cost and fair value of investments in equity securities [Table Text Block]
				Gross Unrealized				Fair
	(at September 30, 2013, in millions)	Cost		Gains		Losses		Value
	Common stock	$	380	$	205	$	1	$	584
	Non-redeemable preferred stock	90		35		1		124
	Total	$	470	$	240	$	2	$	708
				Gross Unrealized				Fair
	(at December 31, 2012, in millions)	Cost		Gains		Losses		Value
	Common stock	$	366	$	148	$	4	$	510
	Non-redeemable preferred stock	96		39		—		135
	Total	$	462	$	187	$	4	$	645
Unrealized investment losses [Table Text Block]
		Less than 12 months				12 months or longer					Total
	(at September 30, 2013, in millions)	Fair		Gross		Fair		Gross			Fair		Gross
		Value		Unrealized		Value		Unrealized			Value		Unrealized
				Losses				Losses					Losses
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	238	$	8	$	—	$	—		$	238	$	8
	Obligations of states, municipalities and political subdivisions	4,852		333		11		1			4,863		334
	Debt securities issued by foreign governments	420		3		—		—			420		3
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	436		10		22		2			458		12
	All other corporate bonds	5,481		231		107		14			5,588		245
	Total fixed maturities	11,427		585		140		17			11,567		602
	Equity securities
	Common stock	37		1		—		—			37		1
	Non-redeemable preferred stock	28		1		—		—			28		1
	Total equity securities	65		2		—		—			65		2
	Total	$	11,492	$	587	$	140	$	17		$	11,632	$	604
		Less than 12 months				12 months or longer					Total
	(at December 31, 2012, in millions)	Fair		Gross		Fair		Gross			Fair		Gross
		Value		Unrealized		Value		Unrealized			Value		Unrealized
				Losses				Losses					Losses
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	589	$	1	$	—	$	—		$	589	$	1
	Obligations of states, municipalities and political subdivisions	611		9		45		2			656		11
	Debt securities issued by foreign governments	186		—		2		—			188		—
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	70		—		36		2			106		2
	All other corporate bonds	1,097		13		89		7			1,186		20
	Total fixed maturities	2,553		23		172		11			2,725		34
	Equity securities
	Common stock	40		4		—		—			40		4
	Non-redeemable preferred stock	13		—		—		—			13		—
	Total equity securities	53		4		—		—			53		4
	Total	$	2,606	$	27	$	172	$	11		$	2,778	$	38
Securities continuously in an unrealized loss position of greater than 20% of amortized cost by length of time [Table Text Block]
		Period For Which Fair Value Is Less Than 80% of Amortized Cost
	(in millions)	3 Months		Greater Than 3		Greater Than 6		Greater Than			Total
		or Less		Months, 6 Months		Months, 12 Months		12 Months
				or Less		or Less
	Fixed maturities
	Mortgage-backed securities	$	—	$	—	$	—	$	—		$	—
	Other	5		2		—		4			11
	Total fixed maturities	5		2		—		4			11
	Equity securities	1		—		—		—			1
	Total	$	6	$	2	$	—	$	4		$	12
Impairment charges included in net realized investment gains (losses) [Table Text Block]
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in millions)	2013		2012		2013		2012
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	—	$	—	$	—	$	—
	Obligations of states, municipalities and political subdivisions	—		—		—		—
	Debt securities issued by foreign governments	—		—		—		—
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	—		—		2		3
	All other corporate bonds	—		1		—		4
	Redeemable preferred stock	—		—		—		—
	Total fixed maturities	—		1		2		7
	Equity securities
	Common stock	2		1		3		1
	Non-redeemable preferred stock	—		1		—		1
	Total equity securities	2		2		3		2
	Other investments	1		—		5		2
	Total	$	3	$	3	$	10	$	11
Roll-forward of the credit component of other-than-temporary impairments on fixed maturities recognized in the consolidated statement of income for which a portion of the other-than-temporary impairment was recognized in other comprehensive income [Table Text Block]
		2013
	(for the three months ended September 30, in	Cumulative		Additions for		Additions for		Reductions			Adjustments		Cumulative
	millions)	OTTI Credit		OTTI Securities		OTTI		Due to			to Book Value		OTTI Credit
		Losses		Where No		Securities		Sales/Defaults			of Credit-		Losses
		Recognized for		Credit Losses		Where Credit		of Credit-			Impaired		Recognized for
		Securities		Were Previously		Losses Have		Impaired			Securities due		Securities Still
		Held,		Recognized		Been		Securities			to Changes in		Held, End of
		Beginning of				Previously					Cash Flows		Period
		Period				Recognized
	Fixed maturities
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	67	$	—	$	—	$	—		$	2	$	69
	All other corporate bonds	104		—		—		—			1		105
	Total fixed maturities	$	171	$	—	$	—	$	—		$	3	$	174
	(for the nine months ended September 30, in
	millions)
	Fixed maturities
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	63	$	—	$	2	$	—		$	4	$	69
	All other corporate bonds	102		—		—		—			3		105
	Total fixed maturities	$	165	$	—	$	2	$	—		$	7	$	174
		2012
	(for the three months ended September 30, in	Cumulative		Additions for		Additions for		Reductions			Adjustments		Cumulative
	millions)	OTTI Credit		OTTI Securities		OTTI		Due to			to Book Value		OTTI Credit
		Losses		Where No		Securities		Sales/Defaults			of Credit-		Losses
		Recognized for		Credit Losses		Where Credit		of Credit-			Impaired		Recognized for
		Securities		Were Previously		Losses Have		Impaired			Securities due		Securities Still
		Held,		Recognized		Been		Securities			to Changes in		Held, End of
		Beginning of				Previously					Cash Flows		Period
		Period				Recognized
	Fixed maturities
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	61	$	—	$	—	$	(1	)	$	1	$	61
	All other corporate bonds	99		—		1		—			1		101
	Total fixed maturities	$	160	$	—	$	1	$	(1	)	$	2	$	162
	(for the nine months ended September 30, in
	millions)
	Fixed maturities
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	58	$	—	$	3	$	(1	)	$	1	$	61
	All other corporate bonds	94		—		4		—			3		101
	Total fixed maturities	$	152	$	—	$	7	$	(1	)	$	4	$	162

Fair_Value_Measurements_tables

Fair Value Measurements (tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Measurements disclosure
Level within the fair value hierarchy at which the Company's financial assets and financial liabilities reported at fair value are measured [Table Text Block]
	(at September 30, 2013, in millions)	Total			Level 1			Level 2			Level 3
	Invested assets:
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,109		$	2,092		$	17		$	—
	Obligations of states, municipalities and political subdivisions	36,250			2			36,224			24
	Debt securities issued by foreign governments	1,974			—			1,974			—
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,516			—			2,484			32
	All other corporate bonds	19,221			—			19,024			197
	Redeemable preferred stock	32			—			32			—
	Total fixed maturities	62,102			2,094			59,755			253
	Equity securities
	Common stock	584			584			—			—
	Non-redeemable preferred stock	124			24			100			—
	Total equity securities	708			608			100			—
	Other investments	50			18			—			32
	Total	$	62,860		$	2,720		$	59,855		$	285
	(at December 31, 2012, in millions)	Total			Level 1			Level 2			Level 3
	Invested assets:
	Fixed maturities
	U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,222		$	2,205		$	17		$	—
	Obligations of states, municipalities and political subdivisions	38,681			—			38,653			28
	Debt securities issued by foreign governments	2,257			—			2,257			—
	Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,997			—			2,992			5
	All other corporate bonds	19,203			—			19,006			197
	Redeemable preferred stock	33			32			1			—
	Total fixed maturities	65,393			2,237			62,926			230
	Equity securities
	Common stock	510			510			—			—
	Non-redeemable preferred stock	135			92			43			—
	Total equity securities	645			602			43			—
	Other investments	100			46			—			54
	Total	$	66,138		$	2,885		$	62,969		$	284
Changes in the Level 3 fair value category [Table Text Block]
	Three Months Ended September 30, 2013 (in millions)	Fixed			Other			Total
		Maturities			Investments
	Balance at June 30, 2013	$	225		$	33		$	258
	Total realized and unrealized investment gains (losses):
	Reported in net realized investment gains (1)	1			(1		)	—
	Reported in increases (decreases) in other comprehensive income	2			—			2
	Purchases, sales and settlements/maturities:
	Purchases	42			—			42
	Sales	(1		)	—			(1		)
	Settlements/maturities	(11		)	—			(11		)
	Gross transfers into Level 3	2			—			2
	Gross transfers out of Level 3	(7		)	—			(7		)
	Balance at September 30, 2013	$	253		$	32		$	285
	Amount of total realized investment gains (losses) for the period included in the consolidated statement of income attributable to changes in the fair value of assets still held at the reporting date	$	—		$	—		$	—
	(1)                 Includes impairments on investments held at the end of the period as well as amortization on fixed maturities.
	Nine Months Ended September 30, 2013 (in millions)	Fixed			Other			Total
		Maturities			Investments
	Balance at December 31, 2012	$	230		$	54		$	284
	Total realized and unrealized investment gains (losses):
	Reported in net realized investment gains (1)	3			12			15
	Reported in increases (decreases) in other comprehensive income	—			(1		)	(1		)
	Purchases, sales and settlements/maturities:
	Purchases	119			—			119
	Sales	(25		)	(33		)	(58		)
	Settlements/maturities	(58		)	—			(58		)
	Gross transfers into Level 3	15			—			15
	Gross transfers out of Level 3	(31		)	—			(31		)
	Balance at September 30, 2013	$	253		$	32		$	285
	Amount of total realized investment gains (losses) for the period included in the consolidated statement of income attributable to changes in the fair value of assets still held at the reporting date	$	—		$	—		$	—
	(1)         Includes impairments on investments held at the end of the period as well as amortization on fixed maturities.
	Twelve Months Ended December 31, 2012 (in millions)	Fixed			Other			Total
		Maturities			Investments
	Balance at December 31, 2011	$	250		$	44		$	294
	Total realized and unrealized investment gains (losses):
	Reported in net realized investment gains (1)	4			5			9
	Reported in increases (decreases) in other comprehensive income	5			2			7
	Purchases, sales and settlements/maturities:
	Purchases	79			3			82
	Sales	—			—			—
	Settlements/maturities	(94		)	—			(94		)
	Gross transfers into Level 3	10			—			10
	Gross transfers out of Level 3	(24		)	—			(24		)
	Balance at December 31, 2012	$	230		$	54		$	284
	Amount of total realized investment gains (losses) for the period included in the consolidated statement of income attributable to changes in the fair value of assets still held at the reporting date	$	—		$	—		$	—
	(1)                               Includes impairments on investments held at the end of the period as well as amortization on fixed maturities.
Carrying value and fair value of financial instruments disclosed, but not carried, at fair value and the level within the fair value hierarchy at which such financial instruments are measured on a recurring basis [Table Text Block]
	(at September 30, 2013, in millions)	Carrying			Fair			Level 1			Level 2		Level 3
		Value			Value
	Financial assets:
	Short-term securities	$	5,379		$	5,379		$	1,995		$	3,323	$	61
	Financial liabilities:
	Debt	$	6,246		$	7,239		$	—		$	7,239	$	—
	Commercial paper	$	100		$	100		$	—		$	100	$	—
	(at December 31, 2012, in millions)	Carrying			Fair			Level 1			Level 2		Level 3
		Value			Value
	Financial assets:
	Short-term securities	$	3,483		$	3,483		$	1,448		$	1,957	$	78
	Financial liabilities:
	Debt	$	6,250		$	7,715		$	—		$	7,715	$	—
	Commercial paper	$	100		$	100		$	—		$	100	$	—

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Other Intangible Assets disclosure
Goodwill by segment [Table Text Block]
	(in millions)	September 30,		December 31,
		2013		2012
	Business Insurance	$	2,168	$	2,168
	Financial, Professional & International Insurance	557		557
	Personal Insurance	613		613
	Other	27		27
	Total	$	3,365	$	3,365
Other intangible assets by major asset class [Table Text Block]
	(at September 30, 2013, in millions)	Gross		Accumulated		Net
		Carrying		Amortization
		Amount
	Intangibles subject to amortization
	Customer-related	$	455	$	406	$	49
	Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables (1)	191		109		82
	Total intangible assets subject to amortization	646		515		131
	Intangible assets not subject to amortization	216		—		216
	Total other intangible assets	$	862	$	515	$	347
	(at December 31, 2012, in millions)	Gross		Accumulated		Net
		Carrying		Amortization
		Amount
	Intangibles subject to amortization
	Customer-related	$	455	$	383	$	72
	Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables (1)	191		98		93
	Total intangible assets subject to amortization	646		481		165
	Intangible assets not subject to amortization	216		—		216
	Total other intangible assets	$	862	$	481	$	381
	(1)                    The time value of money and the risk margin (cost of capital) components of the intangible asset run off at different rates, and, as such, the amount recognized in income may be a net benefit in some periods and a net expense in other periods.
Amortization expense for other intangible assets by major asset class [Table Text Block]
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in millions)	2013		2012		2013		2012
	Customer-related	$	8	$	8	$	23	$	26
	Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables	3		4		11		14
	Total amortization expense	$	11	$	12	$	34	$	40

Other_Comprehensive_Income_and1

Other Comprehensive Income and Accumulated Other Comprehensive Income (tables)	9 Months Ended
	Sep. 30, 2013
Other Comprehensive Income and Accumulated Other Comprehensive Income disclosure
Changes in accumulated other comprehensive income (AOCI) [Table Text Block]
	(in millions)	Changes in Net			Changes in Net			Net Benefit Plan			Net Unrealized			Total Accumulated
		Unrealized Gains on			Unrealized Gains on			Assets and			Foreign Currency			Other
		Investment			Investment Securities			Obligations			Translation			Comprehensive
		Securities Having No			Having Credit Losses			Recognized in						Income
		Credit Losses			Recognized in the			Shareholders’ Equity
		Recognized in the			Consolidated
		Consolidated			Statement of Income
		Statement of Income
	Balance, December 31, 2012	$	2,908		$	195		$	(857	)	$	(10	)	$	2,236
	Other comprehensive income (loss) (OCI) before reclassifications	(1,510		)	1			(1		)	(45		)	(1,555		)
	Amounts reclassified from AOCI	(36		)	1			51			8			24
	Net OCI, current period	(1,546		)	2			50			(37		)	(1,531		)
	Balance, September 30, 2013	$	1,362		$	197		$	(807	)	$	(47	)	$	705
Pretax components of the amounts reclassified from accumulated other comprehensive income and the related income tax expense (benefit) for each component [Table Text Block]
	(in millions)	Three Months			Nine Months
		Ended			Ended
		September 30, 2013			September 30, 2013
	Reclassification adjustments related to unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income (1)	$	(4	)	$	(55	)
	Income tax expense (2)	(1		)	(19		)
	Net of taxes	(3		)	(36		)
	Having credit losses recognized in the consolidated statement of income (1)	—			2
	Income tax benefit (2)	—			1
	Net of taxes	—			1
	Reclassification adjustment related to benefit plan assets and obligations (3)	26			78
	Income tax benefit (2)	9			27
	Net of taxes	17			51
	Reclassification adjustment related to foreign currency translation (1)	11			8
	Income tax benefit (2)	—			—
	Net of taxes	11			8
	Total reclassifications	33			33
	Total income tax benefit	8			9
	Total reclassifications, net of taxes	$	25		$	24
	(1)         (Increases) decreases net realized investment gains (losses) on the consolidated statement of income.
	(2)         (Increases) decreases income tax expense on the consolidated statement of income.
	(3)         Increases (decreases) general and administrative expenses on the consolidated statement of income.
Pretax components of other comprehensive income (loss) and the related income tax expense (benefit) for each component [Table Text Block]
	(for the three months ended September 30, in millions)	2013			2012
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	$	(204	)	$	470
	Income tax expense (benefit)	(72		)	162
	Net of taxes	(132		)	308
	Having credit losses recognized in the consolidated statement of income	(2		)	41
	Income tax expense (benefit)	(1		)	15
	Net of taxes	(1		)	26
	Net changes in benefit plan assets and obligations	24			22
	Income tax expense	9			7
	Net of taxes	15			15
	Net changes in unrealized foreign currency translation	112			65
	Income tax expense	9			8
	Net of taxes	103			57
	Total other comprehensive income (loss)	(70		)	598
	Total income tax expense (benefit)	(55		)	192
	Total other comprehensive income (loss), net of taxes	$	(15	)	$	406
	(for the nine months ended September 30, in millions)	2013			2012
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	$	(2,370	)	$	609
	Income tax expense (benefit)	(824		)	212
	Net of taxes	(1,546		)	397
	Having credit losses recognized in the consolidated statement of income	2			71
	Income tax expense	—			25
	Net of taxes	2			46
	Net changes in benefit plan assets and obligations	78			64
	Income tax expense	28			22
	Net of taxes	50			42
	Net changes in unrealized foreign currency translation	(57		)	43
	Income tax benefit	(20		)	(3		)
	Net of taxes	(37		)	46
	Total other comprehensive income (loss)	(2,347		)	787
	Total income tax expense (benefit)	(816		)	256
	Total other comprehensive income (loss), net of taxes	$	(1,531	)	$	531

Earnings_per_Share_table

Earnings per Share (table)	9 Months Ended
	Sep. 30, 2013
Earnings per Share disclosure
Earnings per share reconciliation [Table Text Block]
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(in millions, except per share amounts)	2013			2012			2013			2012
	Basic and Diluted
	Net income, as reported	$	864		$	864		$	2,685		$	2,169
	Participating share-based awards — allocated income	(6		)	(6		)	(20		)	(17		)
	Net income available to common shareholders — basic and diluted	$	858		$	858		$	2,665		$	2,152
	Common Shares
	Basic
	Weighted average shares outstanding	368.9			384			374.1			388
	Diluted
	Weighted average shares outstanding	368.9			384			374.1			388
	Weighted average effects of dilutive securities — stock options and performance shares	4			3.9			4			3.5
	Total	372.9			387.9			378.1			391.5
	Net Income per Common Share
	Basic	$	2.33		$	2.23		$	7.12		$	5.55
	Diluted	$	2.3		$	2.21		$	7.05		$	5.5

ShareBased_Incentive_Compensat1

Share-Based Incentive Compensation (table)	9 Months Ended
	Sep. 30, 2013
Share-Based Incentive Compensation disclosure
Information for fully vested stock option awards [Table Text Block]
	Stock Options	Number	Weighted		Weighted	Aggregate
			Average		Average	Intrinsic
			Exercise		Contractual	Value
			Price		Life	($ in millions)
					Remaining
	Vested at end of period (1)	8,470,852	$	52.85	5.7 years	$	270
	Exercisable at end of period	5,594,322	$	47.06	4.4 years	$	211
	(1) Represents awards for which the requisite service has been rendered, including those that are retirement eligible.

Pension_Plans_Retirement_Benef1

Pension Plans, Retirement Benefits and Savings Plans (table)	9 Months Ended
	Sep. 30, 2013
Pension Plans, Retirement Benefits and Savings Plans disclosure
Summary of the components of net periodic benefit cost for the Company's pension and postretirement benefit plans recognized in the consolidated statement of income [Table Text Block]
	(for the three months ended September 30, in	Pension Plans						Postretirement Benefit Plans
	millions)	2013			2012			2013			2012
	Net Periodic Benefit Cost:
	Service cost	$	30		$	28		$	—		$	—
	Interest cost on benefit obligation	33			34			3			3
	Expected return on plan assets	(52		)	(46		)	—			—
	Amortization of unrecognized:
	Prior service benefit	—			—			(1		)	—
	Net actuarial loss	27			22			—			—
	Net benefit expense	$	38		$	38		$	2		$	3
	(for the nine months ended September 30, in	Pension Plans						Postretirement Benefit Plans
	millions)	2013			2012			2013			2012
	Net Periodic Benefit Cost:
	Service cost	$	89		$	85		$	—		$	—
	Interest cost on benefit obligation	99			103			7			9
	Expected return on plan assets	(156		)	(140		)	—			(1		)
	Amortization of unrecognized:
	Prior service benefit	—			—			(2		)	—
	Net actuarial loss	80			67			—			—
	Net benefit expense	$	112		$	115		$	5		$	8

Consolidating_Financial_Statem1

Consolidating Financial Statements (Unaudited) (tables)	9 Months Ended
	Sep. 30, 2013
Consolidating Financial Statements of The Travelers Companies, Inc. and Subsidiaries (Unaudited) disclosure
Consolidating Statement of Income (Unaudited) [Table Text Block]	CONSOLIDATING STATEMENT OF INCOME (Unaudited)
	For the three months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Revenues
	Premiums	$	3,839		$	1,827		$	—		$	—		$	5,666
	Net investment income	438			217			2			—			657
	Fee income	106			1			—			—			107
	Net realized investment gains (losses) (1)	3			(25		)	—			—			(22		)
	Other revenues	38			6			—			—			44
	Total revenues	4,424			2,026			2			—			6,452
	Claims and expenses
	Claims and claim adjustment expenses	2,214			1,083			—			—			3,297
	Amortization of deferred acquisition costs	640			313			—			—			953
	General and administrative expenses	646			286			2			—			934
	Interest expense	12			—			79			—			91
	Total claims and expenses	3,512			1,682			81			—			5,275
	Income (loss) before income taxes	912			344			(79		)	—			1,177
	Income tax expense (benefit)	248			93			(28		)	—			313
	Net income of subsidiaries	—			—			915			(915		)	—
	Net income	$	664		$	251		$	864		$	(915	)	$	864
	(1)       Total other-than-temporary impairment (OTTI) for the three months ended September 30, 2013, and the amounts comprising total OTTI that were recognized in net realized investment gains (losses) and in other comprehensive income (OCI) were as follows:
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Total OTTI gains (losses)	$	1		$	(1	)	$	—		$	—		$	—
	OTTI losses recognized in net realized investment gains	$	(2	)	$	(1	)	$	—		$	—		$	(3	)
	OTTI gains recognized in OCI	$	3		$	—		$	—		$	—		$	3
	(2)       The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF INCOME (Unaudited)
	For the three months ended September 30, 2012
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Revenues
	Premiums	$	3,845		$	1,821		$	—		$	—		$	5,666
	Net investment income	443			277			2			—			722
	Fee income	92			—			—			—			92
	Net realized investment gains (losses) (1)	2			(4		)	—			—			(2		)
	Other revenues	21			13			—			—			34
	Total revenues	4,403			2,107			2			—			6,512
	Claims and expenses
	Claims and claim adjustment expenses	2,292			1,067			—			—			3,359
	Amortization of deferred acquisition costs	660			326			—			—			986
	General and administrative expenses	622			284			(2		)	—			904
	Interest expense	19			—			74			—			93
	Total claims and expenses	3,593			1,677			72			—			5,342
	Income (loss) before income taxes	810			430			(70		)	—			1,170
	Income tax expense (benefit)	212			120			(26		)	—			306
	Net income of subsidiaries	—			—			908			(908		)	—
	Net income	$	598		$	310		$	864		$	(908	)	$	864
	(1)       Total other-than-temporary impairment (OTTI) for the three months ended September 30, 2012, and the amounts comprising total OTTI that were recognized in net realized investment gains (losses) and in other comprehensive income (OCI) were as follows:
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Total OTTI gains	$	15		$	2		$	—		$	—		$	17
	OTTI losses recognized in net realized investment gains (losses)	$	(2	)	$	(1	)	$	—		$	—		$	(3	)
	OTTI gains recognized in OCI	$	17		$	3		$	—		$	—		$	20
	(2)       The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF INCOME (Unaudited)
	For the nine months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
					Subsidiaries
	Revenues
	Premiums	$	11,384		$	5,402		$	—		$	—		$	16,786
	Net investment income	1,350			659			5			—			2,014
	Fee income	284			2			—			—			286
Net realized investment gains (1)	120			34			1			—			155
Other revenues	170			43			—			—			213
Total revenues	13,308			6,140			6			—			19,454
Claims and expenses
Claims and claim adjustment expenses	6,684			3,296			—			—			9,980
Amortization of deferred acquisition costs	1,912			939			—			—			2,851
General and administrative expenses	1,915			861			4			—			2,780
Interest expense	41			—			228			—			269
Total claims and expenses	10,552			5,096			232			—			15,880
Income (loss) before income taxes	2,756			1,044			(226		)	—			3,574
Income tax expense (benefit)	700			269			(80		)	—			889
Net income of subsidiaries	—			—			2,831			(2,831		)	—
Net income	$	2,056		$	775		$	2,685		$	(2,831	)	$	2,685
(1)       Total other-than-temporary impairment (OTTI) for the nine months ended September 30, 2013, and the amounts comprising total OTTI that were recognized in net realized investment gains and in other comprehensive income (OCI) were as follows:
(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
				Subsidiaries
Total OTTI gains (losses)	$	(3	)	$	2		$	—		$	—		$	(1	)
OTTI losses recognized in net realized investment gains	$	(7	)	$	(3	)	$	—		$	—		$	(10	)
OTTI gains recognized in OCI	$	4		$	5		$	—		$	—		$	9
(2)       The Travelers Companies, Inc., excluding its subsidiaries.
CONSOLIDATING STATEMENT OF INCOME (Unaudited)
For the nine months ended September 30, 2012
(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
				Subsidiaries
Revenues
Premiums	$	11,333		$	5,385		$	—		$	—		$	16,718
Net investment income	1,444			750			6			—			2,200
Fee income	232			1			—			—			233
Net realized investment gains (losses) (1)	17			(5		)	—			—			12
Other revenues	70			30			—			—			100
Total revenues	13,096			6,161			6			—			19,263
Claims and expenses
Claims and claim adjustment expenses	7,113			3,396			—			—			10,509
Amortization of deferred acquisition costs	1,953			980			—			—			2,933
General and administrative expenses	1,829			850			2			—			2,681
Interest expense	55			—			230			—			285
Total claims and expenses	10,950			5,226			232			—			16,408
Income (loss) before income taxes	2,146			935			(226		)	—			2,855
Income tax expense (benefit)	536			231			(81		)	—			686
Net income of subsidiaries	—			—			2,314			(2,314		)	—
Net income	$	1,610		$	704		$	2,169		$	(2,314	)	$	2,169
(1)       Total other-than-temporary impairment (OTTI) for the nine months ended September 30, 2012, and the amounts comprising total OTTI that were recognized in net realized investment gains (losses) and in other comprehensive income (OCI) were as follows:
(in millions)	TPC			Other			Travelers (2)			Eliminations			Consolidated
				Subsidiaries
Total OTTI gains	$	15		$	13		$	—		$	—		$	28
OTTI losses recognized in net realized investment gains (losses)	$	(8	)	$	(3	)	$	—		$	—		$	(11	)
OTTI gains recognized in OCI	$	23		$	16		$	—		$	—		$	39
(2)       The Travelers Companies, Inc., excluding its subsidiaries.
Consolidating Statement of Comprehensive Income (Unaudited) [Table Text Block]	CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
	For the three months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Net income	$	664		$	251		$	864		$	(915	)	$	864
	Other comprehensive income (loss):
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	(138		)	(71		)	5			—			(204		)
	Having credit losses recognized in the consolidated statement of income	(1		)	(1		)	—			—			(2		)
	Net changes in benefit plan assets and obligations	—			(1		)	25			—			24
	Net changes in unrealized foreign currency translation	26			86			—			—			112
	Other comprehensive income (loss) before income taxes and other comprehensive loss of subsidiaries	(113		)	13			30			—			(70		)
	Income tax expense (benefit)	(46		)	(20		)	11			—			(55		)
	Other comprehensive income (loss), net of taxes, before other comprehensive loss of subsidiaries	(67		)	33			19			—			(15		)
	Other comprehensive loss of subsidiaries	—			—			(34		)	34			—
	Other comprehensive income (loss)	(67		)	33			(15		)	34			(15		)
	Comprehensive income	$	597		$	284		$	849		$	(881	)	$	849
	(1)      The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
	For the three months ended September 30, 2012
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Net income	$	598		$	310		$	864		$	(908	)	$	864
	Other comprehensive income:
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	338			127			5			—			470
	Having credit losses recognized in the consolidated statement of income	28			13			—			—			41
	Net changes in benefit plan assets and obligations	1			—			21			—			22
	Net changes in unrealized foreign currency translation	13			52			—			—			65
	Other comprehensive income before income taxes and other comprehensive income of subsidiaries	380			192			26			—			598
	Income tax expense	129			54			9			—			192
	Other comprehensive income net of taxes, before other comprehensive income of subsidiaries	251			138			17			—			406
	Other comprehensive income of subsidiaries	—			—			389			(389		)	—
	Other comprehensive income	251			138			406			(389		)	406
	Comprehensive income	$	849		$	448		$	1,270		$	(1,297	)	$	1,270
	(1)      The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
	For the nine months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Net income	$	2,056		$	775		$	2,685		$	(2,831	)	$	2,685
	Other comprehensive income (loss):
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	(1,735		)	(647		)	12			—			(2,370		)
	Having credit losses recognized in the consolidated statement of income	4			(2		)	—			—			2
	Net changes in benefit plan assets and obligations	1			2			75			—			78
	Net changes in unrealized foreign currency translation	(35		)	(22		)	—			—			(57		)
	Other comprehensive income (loss) before income taxes and other comprehensive loss of subsidiaries	(1,765		)	(669		)	87			—			(2,347		)
	Income tax expense (benefit)	(616		)	(231		)	31			—			(816		)
	Other comprehensive income (loss), net of taxes, before other comprehensive loss of subsidiaries	(1,149		)	(438		)	56			—			(1,531		)
	Other comprehensive loss of subsidiaries	—			—			(1,587		)	1,587			—
	Other comprehensive loss	(1,149		)	(438		)	(1,531		)	1,587			(1,531		)
	Comprehensive income	$	907		$	337		$	1,154		$	(1,244	)	$	1,154
	(1)      The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (Unaudited)
	For the nine months ended September 30, 2012
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Net income	$	1,610		$	704		$	2,169		$	(2,314	)	$	2,169
	Other comprehensive income:
	Changes in net unrealized gains on investment securities:
	Having no credit losses recognized in the consolidated statement of income	451			147			11			—			609
	Having credit losses recognized in the consolidated statement of income	49			22			—			—			71
	Net changes in benefit plan assets and obligations	1			—			63			—			64
Net changes in unrealized foreign currency translation	(20		)	63			—			—			43
Other comprehensive income before income taxes and other comprehensive income of subsidiaries	481			232			74			—			787
Income tax expense	165			65			26			—			256
Other comprehensive income, net of taxes, before other comprehensive income of subsidiaries	316			167			48			—			531
Other comprehensive income of subsidiaries	—			—			483			(483		)	—
Other comprehensive income	316			167			531			(483		)	531
Comprehensive income	$	1,926		$	871		$	2,700		$	(2,797	)	$	2,700
(1)         The Travelers Companies, Inc., excluding its subsidiaries.
Consolidating Balance Sheet (Unaudited) [Table Text Block]	CONSOLIDATING BALANCE SHEET (Unaudited)
	At September 30, 2013
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Assets
	Fixed maturities, available for sale, at fair value (amortized cost $59,960)	$	42,493		$	19,572		$	37		$	—		$	62,102
	Equity securities, available for sale, at fair value (cost $470)	159			428			121			—			708
	Real estate investments	32			885			—			—			917
	Short-term securities	2,750			833			1,796			—			5,379
	Other investments	2,437			987			1			—			3,425
	Total investments	47,871			22,705			1,955			—			72,531
	Cash	130			163			2			—			295
	Investment income accrued	457			210			6			—			673
	Premiums receivable	4,107			2,006			—			—			6,113
	Reinsurance recoverables	6,153			3,391			—			—			9,544
	Ceded unearned premiums	858			157			—			—			1,015
	Deferred acquisition costs	1,578			224			—			—			1,802
	Deferred taxes	159			55			107			—			321
	Contractholder receivables	3,253			1,197			—			—			4,450
	Goodwill	2,411			954			—			—			3,365
	Other intangible assets	245			102			—			—			347
	Investment in subsidiaries	—			—			28,835			(28,835		)	—
	Other assets	1,882			327			20			—			2,229
	Total assets	$	69,104		$	31,491		$	30,925		$	(28,835	)	$	102,685
	Liabilities
	Claims and claim adjustment expense reserves	$	32,232		$	16,921		$	—		$	—		$	49,153
	Unearned premium reserves	8,136			3,580			—			—			11,716
	Contractholder payables	3,253			1,197			—			—			4,450
	Payables for reinsurance premiums	219			219			—			—			438
	Debt	692			—			5,654			—			6,346
	Other liabilities	4,106			1,195			470			—			5,771
	Total liabilities	48,638			23,112			6,124			—			77,874
	Shareholders’ equity
	Common stock (1,750.0 shares authorized; 364.1 shares issued and outstanding)	—			390			21,425			(390		)	21,425
	Additional paid-in capital	11,635			6,501			—			(18,136		)	—
	Retained earnings	7,873			1,003			23,475			(8,866		)	23,485
	Accumulated other comprehensive income	958			485			705			(1,443		)	705
	Treasury stock, at cost (390.1 shares)	—			—			(20,804		)	—			(20,804		)
	Total shareholders’ equity	20,466			8,379			24,801			(28,835		)	24,811
	Total liabilities and shareholders’ equity	$	69,104		$	31,491		$	30,925		$	(28,835	)	$	102,685
	(1)      The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING BALANCE SHEET (Unaudited)
	At December 31, 2012
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Assets
	Fixed maturities, available for sale, at fair value (amortized cost $60,829)	$	44,336		$	21,019		$	38		$	—		$	65,393
	Equity securities, available for sale, at fair value (cost $462)	153			386			106			—			645
	Real estate investments	33			850			—			—			883
	Short-term securities	1,187			338			1,958			—			3,483
	Other investments	2,443			990			1			—			3,434
	Total investments	48,152			23,583			2,103			—			73,838
	Cash	177			151			2			—			330
	Investment income accrued	507			240			5			—			752
	Premiums receivable	3,944			1,928			—			—			5,872
	Reinsurance recoverables	7,112			3,600			—			—			10,712
	Ceded unearned premiums	698			158			—			—			856
	Deferred acquisition costs	1,560			232			—			—			1,792
	Contractholder receivables	3,540			1,266			—			—			4,806
	Goodwill	2,411			954			—			—			3,365
	Other intangible assets	268			113			—			—			381
	Investment in subsidiaries	—			—			28,562			(28,562		)	—
	Other assets	1,930			286			18			—			2,234
	Total assets	$	70,299		$	32,511		$	30,690		$	(28,562	)	$	104,938
Liabilities
Claims and claim adjustment expense reserves	$	33,598		$	17,324		$	—		$	—		$	50,922
Unearned premium reserves	7,751			3,490			—			—			11,241
Contractholder payables	3,540			1,266			—			—			4,806
Payables for reinsurance premiums	151			195			—			—			346
Deferred taxes	316			123			(101		)	—			338
Debt	1,191			—			5,159			—			6,350
Other liabilities	4,107			1,186			237			—			5,530
Total liabilities	50,654			23,584			5,295			—			79,533
Shareholders’ equity
Common stock (1,750.0 shares authorized; 377.4 shares issued and outstanding)	—			390			21,161			(390		)	21,161
Additional paid-in capital	11,135			6,501			—			(17,636		)	—
Retained earnings	6,404			1,113			21,342			(7,507		)	21,352
Accumulated other comprehensive income	2,106			923			2,236			(3,029		)	2,236
Treasury stock, at cost (372.3 shares)	—			—			(19,344		)	—			(19,344		)
Total shareholders’ equity	19,645			8,927			25,395			(28,562		)	25,405
Total liabilities and shareholders’ equity	$	70,299		$	32,511		$	30,690		$	(28,562	)	$	104,938
(1)      The Travelers Companies, Inc., excluding its subsidiaries.
Consolidating Statement of Cash Flows (Unaudited) [Table Text Block]	CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited)
	For the nine months ended September 30, 2013
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Cash flows from operating activities
	Net income	$	2,056		$	775		$	2,685		$	(2,831	)	$	2,685
	Net adjustments to reconcile net income to net cash provided by operating activities	(348		)	224			(1,531		)	1,859			204
	Net cash provided by operating activities	1,708			999			1,154			(972		)	2,889
	Cash flows from investing activities
	Proceeds from maturities of fixed maturities	4,096			1,820			1			—			5,917
	Proceeds from sales of investments:
	Fixed maturities	590			565			5			—			1,160
	Equity securities	21			36			—			—			57
	Other investments	337			208			—			—			545
	Purchases of investments:
	Fixed maturities	(4,339		)	(2,146		)	(7		)	—			(6,492		)
	Equity securities	(20		)	(29		)	(1		)	—			(50		)
	Real estate investments	—			(65		)	—			—			(65		)
	Other investments	(222		)	(90		)	—			—			(312		)
	Net sales (purchases) of short-term securities	(1,563		)	(492		)	162			—			(1,893		)
	Securities transactions in course of settlement	182			98			—			—			280
	Other	(250		)	(4		)	—			—			(254		)
	Net cash provided by (used in) investing activities	(1,168		)	(99		)	160			—			(1,107		)
	Cash flows from financing activities
	Payment of debt	(500		)	—			—			—			(500		)
	Issuance of debt	—			—			494			—			494
	Dividends paid to shareholders	—			—			(549		)	—			(549		)
	Issuance of common stock — employee share options	—			—			158			—			158
	Treasury stock acquired — share repurchase authorization	—			—			(1,400		)	—			(1,400		)
	Treasury stock acquired — net employee share-based compensation	—			—			(60		)	—			(60		)
	Excess tax benefits from share-based payment arrangements	—			—			43			—			43
	Capital contributions	500			—			—			(500		)	—
	Dividends paid to parent company	(587		)	(885		)	—			1,472			—
	Net cash used in financing activities	(587		)	(885		)	(1,314		)	972			(1,814		)
	Effect of exchange rate changes on cash	—			(3		)	—			—			(3		)
	Net increase (decrease) in cash	(47		)	12			—			—			(35		)
	Cash at beginning of year	177			151			2			—			330
	Cash at end of period	$	130		$	163		$	2		$	—		$	295
	Supplemental disclosure of cash flow information
	Income taxes paid (received)	$	691		$	236		$	(203	)	$	—		$	724
	Interest paid	$	52		$	—		$	154		$	—		$	206
	(1)      The Travelers Companies, Inc., excluding its subsidiaries.
	CONSOLIDATING STATEMENT OF CASH FLOWS (Unaudited)
	For the nine months ended September 30, 2012
	(in millions)	TPC			Other			Travelers (1)			Eliminations			Consolidated
					Subsidiaries
	Cash flows from operating activities
	Net income	$	1,610		$	704		$	2,169		$	(2,314	)	$	2,169
	Net adjustments to reconcile net income to net cash provided by operating activities	552			(136		)	(921		)	1,102			597
	Net cash provided by operating activities	2,162			568			1,248			(1,212		)	2,766
	Cash flows from investing activities
	Proceeds from maturities of fixed maturities	4,123			1,731			1			—			5,855
	Proceeds from sales of investments:
	Fixed maturities	494			228			2			—			724
	Equity securities	18			13			—			—			31
	Real estate investments	—			3			—			—			3
	Other investments	389			127			—			—			516
	Purchases of investments:
	Fixed maturities	(5,645		)	(2,023		)	(9		)	—			(7,677		)
	Equity securities	(1		)	(37		)	(1		)	—			(39		)
	Real estate investments	—			(62		)	—			—			(62		)
	Other investments	(187		)	(105		)	—			—			(292		)
	Net sales (purchases) of short-term securities	(306		)	(99		)	364			—			(41		)
	Securities transactions in course of settlement	46			7			—			—			53
Other	(235		)	6			—			—			(229		)
Net cash provided by (used in) investing activities	(1,304		)	(211		)	357			—			(1,158		)
Cash flows from financing activities
Payment of debt	—			—			(258		)	—			(258		)
Dividends paid to shareholders	—			—			(519		)	—			(519		)
Issuance of common stock — employee share options	—			—			247			—			247
Treasury stock acquired — share repurchase authorization	—			—			(1,056		)	—			(1,056		)
Treasury stock acquired — net employee share-based compensation	—			—			(52		)	—			(52		)
Excess tax benefits from share-based payment arrangements	—			—			32			—			32
Dividends paid to parent company	(854		)	(358		)	—			1,212			—
Net cash used in financing activities	(854		)	(358		)	(1,606		)	1,212			(1,606		)
Effect of exchange rate changes on cash	—			4			—			—			4
Net increase (decrease) in cash	4			3			(1		)	—			6
Cash at beginning of year	114			98			2			—			214
Cash at end of period	$	118		$	101		$	1		$	—		$	220
Supplemental disclosure of cash flow information
Income taxes paid (received)	$	343		$	110		$	(143	)	$	—		$	310
Interest paid	$	65		$	—		$	161		$	—		$	226
(1)      The Travelers Companies, Inc., excluding its subsidiaries.

Basis_of_Presentation_and_Acco2

Basis of Presentation and Accounting Policies (details)	9 Months Ended
	Sep. 30, 2013
	item
Basis of Presentation and Accounting Policies disclosure
Number of reportable business segments	3
Number of groups comprising Business Insurance Core	6
Percent of common stock owned, J. Malucelli - Brazilian joint venture	49.50%

Basis_of_Presentation_and_Acco3

Basis of Presentation and Accounting Policies (details) - Acquisitions (The Dominion of Canada General Insurance Company [Member])	Sep. 30, 2013	Sep. 30, 2013	Jun. 10, 2013
In Millions, unless otherwise specified	US Dollars [Member]	Canadian Dollars [Member]	Canadian Dollars [Member]
	USD ($)	CAD	CAD
Business acquisitions
Approximate cash purchase price in agreement to acquire all of the issued and outstanding shares of a foreign entity, subject to adjustment upon final closing of transaction	$1,092	1,125	1,125

Segment_Information_details

Segment Information (details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment reporting information
Premiums	$5,666		$5,666		$16,786		$16,718
Net investment income	657		722		2,014		2,200
Fee income	107		92		286		233
Other revenues	44		34		213		100
Operating income	883		867		2,586		2,163
Net realized investment gains (losses)	-22	[1]	-2	[1]	155	[1]	12	[1]
Total revenues	6,452		6,512		19,454		19,263
Net realized investment gains (losses), net of tax	-19		-3		99		6
Net income	864		864		2,685		2,169
Reportable Segments [Member]
Segment reporting information
Premiums	5,666		5,666		16,786		16,718
Net investment income	657		722		2,014		2,200
Fee income	107		92		286		233
Other revenues	47		34		217		104
Total operating revenues	6,477		6,514		19,303		19,255
Operating income	948		929		2,773		2,359
Reportable Segments [Member] | Business Insurance [Member]
Segment reporting information
Premiums	3,046		2,982		9,006		8,718
Net investment income	479		524		1,468		1,592
Fee income	106		92		285		232
Other revenues	8		9		135		31
Total operating revenues	3,639		3,607		10,894		10,573
Operating income	526		543		1,695		1,517
Reportable Segments [Member] | Business Insurance [Member] | Workers' compensation [Member]
Segment reporting information
Premiums	896		841		2,640		2,378
Reportable Segments [Member] | Business Insurance [Member] | Automobile [Member]
Segment reporting information
Premiums	476		488		1,425		1,462
Reportable Segments [Member] | Business Insurance [Member] | Commercial Property [Member]
Segment reporting information
Premiums	432		414		1,259		1,207
Reportable Segments [Member] | Business Insurance [Member] | General Liability [Member]
Segment reporting information
Premiums	452		444		1,333		1,313
Reportable Segments [Member] | Business Insurance [Member] | Commercial multi-peril [Member]
Segment reporting information
Premiums	779		785		2,320		2,333
Reportable Segments [Member] | Business Insurance [Member] | Other [Member]
Segment reporting information
Premiums	11		10		29		25
Reportable Segments [Member] | Financial, Professional & International Insurance [Member]
Segment reporting information
Premiums	785		772		2,271		2,275
Net investment income	88		97		271		300
Fee income	1				1		1
Other revenues	5		8		15		21
Total operating revenues	879		877		2,558		2,597
Operating income	160		180		477		511
Reportable Segments [Member] | Financial, Professional & International Insurance [Member] | General Liability [Member]
Segment reporting information
Premiums	227		216		661		633
Reportable Segments [Member] | Financial, Professional & International Insurance [Member] | Other [Member]
Segment reporting information
Premiums	44		42		132		125
Reportable Segments [Member] | Financial, Professional & International Insurance [Member] | Fidelity and surety [Member]
Segment reporting information
Premiums	235		240		683		699
Reportable Segments [Member] | Financial, Professional & International Insurance [Member] | International [Member]
Segment reporting information
Premiums	279		274		795		818
Reportable Segments [Member] | Personal Insurance [Member]
Segment reporting information
Premiums	1,835		1,912		5,509		5,725
Net investment income	90		101		275		308
Other revenues	34		17		67		52
Total operating revenues	1,959		2,030		5,851		6,085
Operating income	262		206		601		331
Reportable Segments [Member] | Personal Insurance [Member] | Automobile [Member]
Segment reporting information
Premiums	855		916		2,591		2,762
Reportable Segments [Member] | Personal Insurance [Member] | Homeowners and other [Member]
Segment reporting information
Premiums	980		996		2,918		2,963
Interest Expense & Other [Member]
Segment reporting information
Other revenues	-3				-4		-4
Operating income	-65		-62		-187		-196
After-tax interest expense	$59		$60		$175		$185
[1]	Total other-than-temporary impairment (OTTI) gains (losses) were $0 million and $17 million for the three months ended September 30, 2013 and 2012, respectively, and $(1) million and $28 million for the nine months ended September 30, 2013 and 2012, respectively. Of total OTTI, credit losses of $(3) million for each of the three months ended September 30, 2013 and 2012, and $(10) million and $(11) million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in net realized investment gains (losses). In addition, unrealized gains from other changes in total OTTI of $3 million and $20 million for the three months ended September 30, 2013 and 2012, respectively, and $9 million and $39 million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in other comprehensive income (loss) as part of change in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.

Segment_Information_details_As

Segment Information (details) - Assets by Segment (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Assets by segment
Total assets	$102,685	$104,938
Reportable Segments [Member]
Assets by segment
Total assets	102,188	104,619
Reportable Segments [Member] | Business Insurance [Member]
Assets by segment
Total assets	74,931	76,972
Reportable Segments [Member] | Financial, Professional & International Insurance [Member]
Assets by segment
Total assets	14,084	13,452
Reportable Segments [Member] | Personal Insurance [Member]
Assets by segment
Total assets	13,173	14,195
Interest Expense & Other [Member]
Assets by segment
Total assets	$497	$319

Investments_details

Investments (details)	9 Months Ended
	Sep. 30, 2013
Investments disclosure
Unrealized investment losses for securities for which fair value is less than 80% of amortized cost, as a percentage of the combined fixed maturity and equity security portfolios on a pretax basis	less than 1%
Unrealized investment losses for securities for which fair value is less than 80% of amortized cost, as a percentage of shareholders' equity on an after-tax basis	less than 1%

Investments_details_Investment

Investments (details) - Investment Information (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Investment disclosure details
Fixed maturities, amortized cost	$59,960	$60,829
Fixed maturities, at fair value	62,102	65,393
Equity securities, cost	470	462
Equity securities, at fair value	708	645
Continuous unrealized loss position less than 12 months, fair value	11,492	2,606
Continuous unrealized loss position less than 12 months, gross unrealized losses	587	27
Continuous unrealized loss position 12 months or longer, fair value	140	172
Continuous unrealized loss position 12 months or longer, gross unrealized losses	17	11
Continuous unrealized loss position, total, fair value	11,632	2,778
Continuous unrealized loss position, total, gross unrealized losses	604	38
Available-for-sale securities for which fair value is less than 80% of amortized cost, 3 months or less	6
Available-for-sale securities for which fair value is less than 80% of amortized cost, greater than 3 months, 6 months or less	2
Available-for-sale securities for which fair value is less than 80% of amortized cost, greater than 12 months	4
Available-for-sale securities for which fair value is less than 80% of amortized cost, total	12
Fixed maturities [Member]
Investment disclosure details
Fixed maturities, amortized cost	59,960	60,829
Gross unrealized gains	2,744	4,598
Gross unrealized losses	602	34
Fixed maturities, at fair value	62,102	65,393
Continuous unrealized loss position less than 12 months, fair value	11,427	2,553
Continuous unrealized loss position less than 12 months, gross unrealized losses	585	23
Continuous unrealized loss position 12 months or longer, fair value	140	172
Continuous unrealized loss position 12 months or longer, gross unrealized losses	17	11
Continuous unrealized loss position, total, fair value	11,567	2,725
Continuous unrealized loss position, total, gross unrealized losses	602	34
Available-for-sale securities for which fair value is less than 80% of amortized cost, 3 months or less	5
Available-for-sale securities for which fair value is less than 80% of amortized cost, greater than 3 months, 6 months or less	2
Available-for-sale securities for which fair value is less than 80% of amortized cost, greater than 12 months	4
Available-for-sale securities for which fair value is less than 80% of amortized cost, total	11
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities [Member]
Investment disclosure details
Fixed maturities, amortized cost	2,069	2,148
Gross unrealized gains	48	75
Gross unrealized losses	8	1
Fixed maturities, at fair value	2,109	2,222
Continuous unrealized loss position less than 12 months, fair value	238	589
Continuous unrealized loss position less than 12 months, gross unrealized losses	8	1
Continuous unrealized loss position, total, fair value	238	589
Continuous unrealized loss position, total, gross unrealized losses	8	1
Obligations of states, municipalities and political subdivisions [Member]
Investment disclosure details
Fixed maturities, amortized cost	34,958	35,863
Gross unrealized gains	1,626	2,829
Gross unrealized losses	334	11
Fixed maturities, at fair value	36,250	38,681
Continuous unrealized loss position less than 12 months, fair value	4,852	611
Continuous unrealized loss position less than 12 months, gross unrealized losses	333	9
Continuous unrealized loss position 12 months or longer, fair value	11	45
Continuous unrealized loss position 12 months or longer, gross unrealized losses	1	2
Continuous unrealized loss position, total, fair value	4,863	656
Continuous unrealized loss position, total, gross unrealized losses	334	11
Obligations of states, municipalities and political subdivisions, pre-refunded [Member]
Investment disclosure details
Fixed maturities, amortized cost	9,141	8,458
Gross unrealized gains	489	567
Gross unrealized losses	1
Fixed maturities, at fair value	9,629	9,025
Obligations of states, municipalities and political subdivisions, all other (not pre-refunded) [Member]
Investment disclosure details
Fixed maturities, amortized cost	25,817	27,405
Gross unrealized gains	1,137	2,262
Gross unrealized losses	333	11
Fixed maturities, at fair value	26,621	29,656
Debt securities issued by foreign governments [Member]
Investment disclosure details
Fixed maturities, amortized cost	1,937	2,185
Gross unrealized gains	40	72
Gross unrealized losses	3
Fixed maturities, at fair value	1,974	2,257
Continuous unrealized loss position less than 12 months, fair value	420	186
Continuous unrealized loss position less than 12 months, gross unrealized losses	3
Continuous unrealized loss position 12 months or longer, fair value		2
Continuous unrealized loss position, total, fair value	420	188
Continuous unrealized loss position, total, gross unrealized losses	3
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member]
Investment disclosure details
Fixed maturities, amortized cost	2,337	2,744
Gross unrealized gains	191	255
Gross unrealized losses	12	2
Fixed maturities, at fair value	2,516	2,997
Continuous unrealized loss position less than 12 months, fair value	436	70
Continuous unrealized loss position less than 12 months, gross unrealized losses	10
Continuous unrealized loss position 12 months or longer, fair value	22	36
Continuous unrealized loss position 12 months or longer, gross unrealized losses	2	2
Continuous unrealized loss position, total, fair value	458	106
Continuous unrealized loss position, total, gross unrealized losses	12	2
All other corporate bonds [Member]
Investment disclosure details
Fixed maturities, amortized cost	18,633	17,863
Gross unrealized gains	833	1,360
Gross unrealized losses	245	20
Fixed maturities, at fair value	19,221	19,203
Continuous unrealized loss position less than 12 months, fair value	5,481	1,097
Continuous unrealized loss position less than 12 months, gross unrealized losses	231	13
Continuous unrealized loss position 12 months or longer, fair value	107	89
Continuous unrealized loss position 12 months or longer, gross unrealized losses	14	7
Continuous unrealized loss position, total, fair value	5,588	1,186
Continuous unrealized loss position, total, gross unrealized losses	245	20
Other fixed maturities [Member]
Investment disclosure details
Available-for-sale securities for which fair value is less than 80% of amortized cost, 3 months or less	5
Available-for-sale securities for which fair value is less than 80% of amortized cost, greater than 3 months, 6 months or less	2
Available-for-sale securities for which fair value is less than 80% of amortized cost, greater than 12 months	4
Available-for-sale securities for which fair value is less than 80% of amortized cost, total	11
Redeemable preferred stock [Member]
Investment disclosure details
Fixed maturities, amortized cost	26	26
Gross unrealized gains	6	7
Fixed maturities, at fair value	32	33
Equity securities [Member]
Investment disclosure details
Equity securities, cost	470	462
Gross unrealized gains	240	187
Gross unrealized losses	2	4
Equity securities, at fair value	708	645
Continuous unrealized loss position less than 12 months, fair value	65	53
Continuous unrealized loss position less than 12 months, gross unrealized losses	2	4
Continuous unrealized loss position, total, fair value	65	53
Continuous unrealized loss position, total, gross unrealized losses	2	4
Available-for-sale securities for which fair value is less than 80% of amortized cost, 3 months or less	1
Available-for-sale securities for which fair value is less than 80% of amortized cost, total	1
Equity securities, common stock [Member]
Investment disclosure details
Equity securities, cost	380	366
Gross unrealized gains	205	148
Gross unrealized losses	1	4
Equity securities, at fair value	584	510
Continuous unrealized loss position less than 12 months, fair value	37	40
Continuous unrealized loss position less than 12 months, gross unrealized losses	1	4
Continuous unrealized loss position, total, fair value	37	40
Continuous unrealized loss position, total, gross unrealized losses	1	4
Equity securities, non-redeemable preferred stock [Member]
Investment disclosure details
Equity securities, cost	90	96
Gross unrealized gains	35	39
Gross unrealized losses	1
Equity securities, at fair value	124	135
Continuous unrealized loss position less than 12 months, fair value	28	13
Continuous unrealized loss position less than 12 months, gross unrealized losses	1
Continuous unrealized loss position, total, fair value	28	13
Continuous unrealized loss position, total, gross unrealized losses	$1

Investments_details_Impairment

Investments (details) - Impairment Charges (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Impairment charges
Impairment charges	$3	$3	$10	$11
Fixed maturities [Member]
Impairment charges
Impairment charges		1	2	7
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member]
Impairment charges
Impairment charges			2	3
All other corporate bonds [Member]
Impairment charges
Impairment charges		1		4
Equity securities [Member]
Impairment charges
Impairment charges	2	2	3	2
Equity securities, common stock [Member]
Impairment charges
Impairment charges	2	1	3	1
Equity securities, non-redeemable preferred stock [Member]
Impairment charges
Impairment charges		1		1
Other investments [Member]
Impairment charges
Impairment charges	$1		$5	$2

Investments_details_OTTI_Rollf

Investments (details) - OTTI Rollforward (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Roll-forward of the credit component of other-than-temporary impairments on fixed maturities recognized in the consolidated statement of income for which a portion of the other-than-temporary impairment was recognized in other comprehensive income [Roll Forward]
Cumulative OTTI credit losses recognized for securities held, beginning of period	$171	$160	$165	$152
Additions for OTTI securities where credit losses have been previously recognized		1	2	7
Reductions due to sales/defaults of credit-impaired securities		-1		-1
Adjustments to book value of credit-impaired securities due to changes in cash flows	3	2	7	4
Cumulative OTTI credit losses recognized for securities still held, end of period	174	162	174	162
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member]
Roll-forward of the credit component of other-than-temporary impairments on fixed maturities recognized in the consolidated statement of income for which a portion of the other-than-temporary impairment was recognized in other comprehensive income [Roll Forward]
Cumulative OTTI credit losses recognized for securities held, beginning of period	67	61	63	58
Additions for OTTI securities where credit losses have been previously recognized			2	3
Reductions due to sales/defaults of credit-impaired securities		-1		-1
Adjustments to book value of credit-impaired securities due to changes in cash flows	2	1	4	1
Cumulative OTTI credit losses recognized for securities still held, end of period	69	61	69	61
All other corporate bonds [Member]
Roll-forward of the credit component of other-than-temporary impairments on fixed maturities recognized in the consolidated statement of income for which a portion of the other-than-temporary impairment was recognized in other comprehensive income [Roll Forward]
Cumulative OTTI credit losses recognized for securities held, beginning of period	104	99	102	94
Additions for OTTI securities where credit losses have been previously recognized		1		4
Adjustments to book value of credit-impaired securities due to changes in cash flows	1	1	3	3
Cumulative OTTI credit losses recognized for securities still held, end of period	$105	$101	$105	$101

Investments_details_Derivative

Investments (details) - Derivatives (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Derivative
Net realized investment gain (loss)	($22,000,000)	[1]	($2,000,000)	[1]	$155,000,000	[1]	$12,000,000	[1]
Futures [Member] | U.S. Treasury notes contracts [Member]
Derivative
Notional value of open contracts	0				0				800,000,000
Net realized investment gain (loss)	$0		($8,000,000)		$115,000,000		($15,000,000)
[1]	Total other-than-temporary impairment (OTTI) gains (losses) were $0 million and $17 million for the three months ended September 30, 2013 and 2012, respectively, and $(1) million and $28 million for the nine months ended September 30, 2013 and 2012, respectively. Of total OTTI, credit losses of $(3) million for each of the three months ended September 30, 2013 and 2012, and $(10) million and $(11) million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in net realized investment gains (losses). In addition, unrealized gains from other changes in total OTTI of $3 million and $20 million for the three months ended September 30, 2013 and 2012, respectively, and $9 million and $39 million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in other comprehensive income (loss) as part of change in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.

Fair_Value_Measurements_detail

Fair Value Measurements (details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Fair Value Measurements disclosure
Percent of fixed maturities for which a pricing service estimates fair value	98.00%	98.00%
Fair value of the fixed maturities for which the Company used an internal pricing matrix	$103	$102
Fair value of the fixed maturities for which the Company received a broker quote	150	128
Convertible bonds held containing embedded conversion options that are valued separately from the host bond contract and disclosed in Level 2	$20	$21
Percent of short-term securities for which a pricing service estimates fair value	98.00%	95.00%
Percent of debt, including commercial paper, for which a pricing service estimates fair value	100.00%	100.00%

Fair_Value_Measurements_detail1

Fair Value Measurements (details) - Fair Value Hierarchy (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	$62,860	$66,138
Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2,720	2,885
Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	59,855	62,969
Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	285	284
Fixed maturities [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	62,102	65,393
Fixed maturities [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2,094	2,237
Fixed maturities [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	59,755	62,926
Fixed maturities [Member] | Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	253	230
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2,109	2,222
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2,092	2,205
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	17	17
Obligations of states, municipalities and political subdivisions [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	36,250	38,681
Obligations of states, municipalities and political subdivisions [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2
Obligations of states, municipalities and political subdivisions [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	36,224	38,653
Obligations of states, municipalities and political subdivisions [Member] | Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	24	28
Debt securities issued by foreign governments [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	1,974	2,257
Debt securities issued by foreign governments [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	1,974	2,257
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2,516	2,997
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	2,484	2,992
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities [Member] | Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	32	5
All other corporate bonds [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	19,221	19,203
All other corporate bonds [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	19,024	19,006
All other corporate bonds [Member] | Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	197	197
Redeemable preferred stock [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	32	33
Transfers from Level 1 to Level 2	32
Redeemable preferred stock [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis		32
Redeemable preferred stock [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	32	1
Equity securities [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	708	645
Equity securities [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	608	602
Equity securities [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	100	43
Equity securities, common stock [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	584	510
Equity securities, common stock [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	584	510
Equity securities, non-redeemable preferred stock [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	124	135
Transfers from Level 1 to Level 2	59	4
Transfers from Level 2 to Level 1	3
Equity securities, non-redeemable preferred stock [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	24	92
Equity securities, non-redeemable preferred stock [Member] | Level 2 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	100	43
Other investments [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	50	100
Other investments [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	18	46
Other investments [Member] | Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	32	54
Investments in various publicly-traded securities, including securities in the Company's trading portfolio, mutual funds and other small holdings disclosed in Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	18	46
Investments in various publicly-traded securities, including securities in the Company's trading portfolio, mutual funds and other small holdings disclosed in Level 1 [Member] | Level 1 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	18	46
Investment in non-public common and preferred equity securities where the fair value estimate is determined either internally or by an external fund manager and therefore disclosed in Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	32	54
Investment in non-public common and preferred equity securities where the fair value estimate is determined either internally or by an external fund manager and therefore disclosed in Level 3 [Member] | Level 3 [Member]
Level within the fair value hierarchy at which the Company's financial assets are measured
Total invested assets measured on a recurring basis	$32	$54

Fair_Value_Measurements_detail2

Fair Value Measurements (details) - Changes in Level 3 (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Changes in Level 3 fair value category [Roll Forward]
Level 3 fair value category, beginning balance	$258	$284	$294
Level 3 fair value category, total realized and unrealized investment gains (losses) reported in net realized investment gains		15	9
Level 3 fair value category, total unrealized investment gains (losses) reported in increases (decreases) in other comprehensive income	2	-1	7
Level 3 fair value category purchases	42	119	82
Level 3 fair value category sales	-1	-58
Level 3 fair value category settlements/maturities	-11	-58	-94
Gross transfers into Level 3	2	15	10
Gross transfers out of Level 3	-7	-31	-24
Level 3 fair value category, ending balance	285	285	284
Fixed maturities [Member]
Changes in Level 3 fair value category [Roll Forward]
Level 3 fair value category, beginning balance	225	230	250
Level 3 fair value category, total realized and unrealized investment gains (losses) reported in net realized investment gains	1	3	4
Level 3 fair value category, total unrealized investment gains (losses) reported in increases (decreases) in other comprehensive income	2		5
Level 3 fair value category purchases	42	119	79
Level 3 fair value category sales	-1	-25
Level 3 fair value category settlements/maturities	-11	-58	-94
Gross transfers into Level 3	2	15	10
Gross transfers out of Level 3	-7	-31	-24
Level 3 fair value category, ending balance	253	253	230
Other investments [Member]
Changes in Level 3 fair value category [Roll Forward]
Level 3 fair value category, beginning balance	33	54	44
Level 3 fair value category, total realized and unrealized investment gains (losses) reported in net realized investment gains	-1	12	5
Level 3 fair value category, total unrealized investment gains (losses) reported in increases (decreases) in other comprehensive income		-1	2
Level 3 fair value category purchases			3
Level 3 fair value category sales		-33
Level 3 fair value category, ending balance	$32	$32	$54

Fair_Value_Measurements_Footno

Fair Value Measurements Footnote (details) - Financial Instruments (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Financial Instruments
Short-term securities	$5,379	$3,483
Fair Value [Member]
Financial Instruments
Short-term securities	5,379	3,483
Debt	7,239	7,715
Commercial paper	100	100
Fair Value [Member] | Level 1 [Member]
Financial Instruments
Short-term securities	1,995	1,448
Fair Value [Member] | Level 2 [Member]
Financial Instruments
Short-term securities	3,323	1,957
Debt	7,239	7,715
Commercial paper	100	100
Fair Value [Member] | Level 3 [Member]
Financial Instruments
Short-term securities	61	78
Carrying Value [Member]
Financial Instruments
Short-term securities	5,379	3,483
Debt	6,246	6,250
Commercial paper	$100	$100

Goodwill_details

Goodwill (details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Goodwill and Other Intangible Assets disclosure
Intangible assets not subject to amortization	$216	$216
Total other intangible assets, gross carrying amount	862	862
Total other intangible assets, accumulated amortization	515	481
Total other intangible assets, net	347	381
Estimated intangible asset amortization expense, remainder of 2013	11
Estimated intangible asset amortization expense, 2014	43
Estimated intangible asset amortization expense, 2015	23
Estimated intangible asset amortization expense, 2016	9
Estimated intangible asset amortization expense, 2017	$8

Goodwill_details_Goodwill_by_S

Goodwill (details) - Goodwill by Segment (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Goodwill by segment
Goodwill	$3,365	$3,365
Reportable Segments [Member] | Business Insurance [Member]
Goodwill by segment
Goodwill	2,168	2,168
Reportable Segments [Member] | Financial, Professional & International Insurance [Member]
Goodwill by segment
Goodwill	557	557
Reportable Segments [Member] | Personal Insurance [Member]
Goodwill by segment
Goodwill	613	613
Other [Member]
Goodwill by segment
Goodwill	$27	$27

Goodwill_details_Other_Intangi

Goodwill (details) - Other Intangible Assets (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Other intangible assets by major asset class
Intangible assets subject to amortization, gross carrying amount	$646		$646		$646
Intangible assets subject to amortization, accumulated amortization	515		515		481
Intangible assets subject to amortization, net	131		131		165
Amortization expense for other intangible assets	11	12	34	40
Customer-related [Member]
Other intangible assets by major asset class
Intangible assets subject to amortization, gross carrying amount	455		455		455
Intangible assets subject to amortization, accumulated amortization	406		406		383
Intangible assets subject to amortization, net	49		49		72
Amortization expense for other intangible assets	8	8	23	26
Fair value adjustment on claims and claim adjustment expense reserves and reinsurance recoverables [Member]
Other intangible assets by major asset class
Intangible assets subject to amortization, gross carrying amount	191		191		191
Intangible assets subject to amortization, accumulated amortization	109		109		98
Intangible assets subject to amortization, net	82		82		93
Amortization expense for other intangible assets	$3	$4	$11	$14

Other_Comprehensive_Income_and2

Other Comprehensive Income and Accumulated Other Comprehensive Income (details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated other comprehensive income [Roll Forward]
Accumulated other comprehensive income, net of tax, balance, beginning of year			$2,236	$2,005
Other comprehensive income (loss) before reclassifications			-1,555
Amounts reclassified from accumulated other comprehensive income			24
Other comprehensive income (loss), net of taxes	-15	406	-1,531	531
Accumulated other comprehensive income, net of tax, balance, end of period	705	2,536	705	2,536
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	-204	470	-2,370	609
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	-2	41	2	71
Net changes in benefit plan assets and obligations	24	22	78	64
Net changes in unrealized foreign currency translation	112	65	-57	43
Other comprehensive income (loss) before income taxes	-70	598	-2,347	787
Income tax expense (benefit), other comprehensive income (loss)	-55	192	-816	256
Changes in Net Unrealized Gains on Investment Securities Having No Credit Losses Recognized in the Consolidated Statement of Income [Member]
Accumulated other comprehensive income [Roll Forward]
Accumulated other comprehensive income, net of tax, balance, beginning of year			2,908
Other comprehensive income (loss) before reclassifications			-1,510
Amounts reclassified from accumulated other comprehensive income			-36
Other comprehensive income (loss), net of taxes	-132	308	-1,546	397
Accumulated other comprehensive income, net of tax, balance, end of period	1,362		1,362
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	-204	470	-2,370	609
Income tax expense (benefit), other comprehensive income (loss)	-72	162	-824	212
Changes in Net Unrealized Gains on Investment Securities Having Credit Losses Recognized in the Consolidated Statement of Income [Member]
Accumulated other comprehensive income [Roll Forward]
Accumulated other comprehensive income, net of tax, balance, beginning of year			195
Other comprehensive income (loss) before reclassifications			1
Amounts reclassified from accumulated other comprehensive income			1
Other comprehensive income (loss), net of taxes	-1	26	2	46
Accumulated other comprehensive income, net of tax, balance, end of period	197		197
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	-2	41	2	71
Income tax expense (benefit), other comprehensive income (loss)	-1	15		25
Net Benefit Plan Assets and Obligations Recognized in Shareholders' Equity [Member]
Accumulated other comprehensive income [Roll Forward]
Accumulated other comprehensive income, net of tax, balance, beginning of year			-857
Other comprehensive income (loss) before reclassifications			-1
Amounts reclassified from accumulated other comprehensive income			51
Other comprehensive income (loss), net of taxes	15	15	50	42
Accumulated other comprehensive income, net of tax, balance, end of period	-807		-807
Net changes in benefit plan assets and obligations	24	22	78	64
Income tax expense (benefit), other comprehensive income (loss)	9	7	28	22
Net Unrealized Foreign Currency Translation [Member]
Accumulated other comprehensive income [Roll Forward]
Accumulated other comprehensive income, net of tax, balance, beginning of year			-10
Other comprehensive income (loss) before reclassifications			-45
Amounts reclassified from accumulated other comprehensive income			8
Other comprehensive income (loss), net of taxes	103	57	-37	46
Accumulated other comprehensive income, net of tax, balance, end of period	-47		-47
Net changes in unrealized foreign currency translation	112	65	-57	43
Income tax expense (benefit), other comprehensive income (loss)	$9	$8	($20)	($3)

Other_Comprehensive_Income_and3

Other Comprehensive Income and Accumulated Other Comprehensive Income (details) - Reclassifications (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Income tax (expense) benefit	$313	$306	$889	$686
Amounts reclassified from accumulated other comprehensive income, net of taxes			24
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, before tax	33		33
Income tax (expense) benefit	8		9
Amounts reclassified from accumulated other comprehensive income, net of taxes	25		24
Changes in Net Unrealized Gains on Investment Securities Having No Credit Losses Recognized in the Consolidated Statement of Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, net of taxes			-36
Changes in Net Unrealized Gains on Investment Securities Having No Credit Losses Recognized in the Consolidated Statement of Income [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, before tax	-4		-55
Income tax (expense) benefit	-1		-19
Amounts reclassified from accumulated other comprehensive income, net of taxes	-3		-36
Changes in Net Unrealized Gains on Investment Securities Having Credit Losses Recognized in the Consolidated Statement of Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, net of taxes			1
Changes in Net Unrealized Gains on Investment Securities Having Credit Losses Recognized in the Consolidated Statement of Income [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, before tax			2
Income tax (expense) benefit			1
Amounts reclassified from accumulated other comprehensive income, net of taxes			1
Net Benefit Plan Assets and Obligations Recognized in Shareholders' Equity [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, net of taxes			51
Net Benefit Plan Assets and Obligations Recognized in Shareholders' Equity [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, before tax	26		78
Income tax (expense) benefit	9		27
Amounts reclassified from accumulated other comprehensive income, net of taxes	17		51
Net Unrealized Foreign Currency Translation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, net of taxes			8
Net Unrealized Foreign Currency Translation [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amounts reclassified from accumulated other comprehensive income, before tax	11		8
Amounts reclassified from accumulated other comprehensive income, net of taxes	$11		$8

Debt_details

Debt (details) (USD $)	0 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Jul. 25, 2013	Sep. 30, 2013
Debt Instrument
Net proceeds of issuance, after original issuance discount and deduction of underwriting expenses and commissions and other expenses		494
4.60% Senior notes due August 1, 2043 [Member]
Debt Instrument
Debt, principal amount	500
Interest rate (percent)	4.60%
Net proceeds of issuance, after original issuance discount and deduction of underwriting expenses and commissions and other expenses	$494
Debt instrument, redemption option, description		The senior notes are redeemable in whole at any time or in part from time to time, at the Company's option, at a redemption price equal to the greater of (a) 100% of the principal amount of senior notes to be redeemed or (b) the sum of the present value of the remaining scheduled payments of principal and interest on the senior notes to be redeemed (exclusive of interest accrued to the date of redemption) discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the then current treasury rate (as defined) plus 15 basis points.
Percentage of principal amount at which redemption price may be set	100.00%
Basis points added to current treasury rate used in calculaiton of alternative redemption price	0.15%

Debt_details_Payment

Debt (details) - Payment (5.00% Senior notes due March 15, 2013 [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Mar. 15, 2013
5.00% Senior notes due March 15, 2013 [Member]
Debt repayment
Debt, principal amount repaid	$500
Interest rate (percent)	5.00%

Debt_details_Line_of_Credit

Debt (details) - Line of Credit (USD $)	0 Months Ended	9 Months Ended		9 Months Ended			0 Months Ended
In Billions, unless otherwise specified	Jun. 07, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Jun. 10, 2013
	Line of credit [Member]	Line of credit [Member]	Line of credit [Member]	Line of credit [Member]	Line of credit [Member]	Line of credit [Member]	Expired line of credit agreement [Member]
			Minimum [Member]	LIBOR [Member]	LIBOR [Member]	LIBOR [Member]
					Maxiumum [Member]	Minimum [Member]
Line of credit
Credit agreement, term (in years)	5 years						3 years
Credit agreement, maximum borrowing capacity	$1						$1
Credit agreement, covenant terms		Pursuant to the credit agreement covenants, the Company must maintain a minimum consolidated net worth, defined as shareholders' equity determined in accordance with GAAP plus (a) trust preferred securities (not to exceed 15% of total capital) and (b) mandatorily convertible securities (combined with trust preferred securities, not to exceed 25% of total capital) less goodwill and other intangible assets. That threshold is adjusted downward by an amount equal to 70% of the aggregate amount of common stock repurchased by the Company after March 31, 2013, up to a maximum deduction of $1.75 billion. The threshold was $14.71 billion at September 30, 2013 and could decline to a minimum of $13.73 billion during the term of the credit agreement, subject to the Company repurchasing an additional $1.40 billion of its common stock. In addition, the credit agreement contains other customary restrictive covenants as well as certain customary events of default, including with respect to a change in control, which is defined to include the acquisition of 35% or more of the Company's voting stock and certain changes in the composition of the Company's board of directors.
Maximum percentage of trust preferred securities relative to total capital in determining consolidated net worth		15.00%
Maximum percentage of trust preferred securities and mandatorily convertible securities relative to total capital in determining consolidated net worth		25.00%
Percentage of aggregate amount of common stock repurchased by the Company after March 31, 2013 by which the threshold is adjusted downward		70.00%
Maximum downward adjustment to threshold relative to common stock repurchases		1.75
Credit agreement, threshold of consolidated net worth		14.71	13.73
Common stock repurchases required during the term of the credit agreement to reduce threshold net worth to minimum amount reported		$1.40
Percentage of Company's voting stock acquired by outside entity that would be considered a change in control		35.00%
Credit agreement, compliance		At September 30, 2013, the Company was in compliance with these covenants.
Credit agreement, cost of borrowing, basis points above LIBOR				1.13%	1.50%	0.88%

Shareholders_Equity_details

Shareholders' Equity (details)	22-May-13
In Millions, unless otherwise specified
Shareholders' Equity disclosure
Number of preferred stock shares the shareholders voted to amend the Company's Articles of Incorporation to provide authority to issue	5

Shareholders_Equity_details_Re

Shareholders' Equity (details) - Repurchases (Board of Directors Approved Repurchase Authorizations [Member], USD $)	3 Months Ended	9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Board of Directors Approved Repurchase Authorizations [Member]
Repurchase activity
Number of shares repurchased (in shares)	9.7	17
Cost of shares repurchased	$800	$1,400
Average cost per share	$82.21	$82.12
Remaining capacity under share repurchase authorization		$759

Shareholders_Equity_details_Ad

Shareholders' Equity (details) - Additional Repurchase Authorization (Subsequent Event [Member], USD $)	0 Months Ended
In Billions, unless otherwise specified	Oct. 22, 2013
Subsequent Event [Member]
Subsequent Event
Additional share repurchase authorization	$5

Earnings_per_Share_details

Earnings per Share (details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings per Share disclosure
Net income	$864	$864	$2,685	$2,169
Participating share-based awards - allocated income	-6	-6	-20	-17
Net income available to common shareholders -- basic	858	858	2,665	2,152
Net income available to common shareholders -- diluted	$858	$858	$2,665	$2,152
Weighted average shares outstanding, basic	368.9	384	374.1	388
Weighted average effects of dilutive securities, stock options and performance shares (in shares)	4	3.9	4	3.5
Weighted average shares outstanding, diluted	372.9	387.9	378.1	391.5
Net income per common share, basic	$2.33	$2.23	$7.12	$5.55
Net income per common share, diluted	$2.30	$2.21	$7.05	$5.50

ShareBased_Incentive_Compensat2

Share-Based Incentive Compensation (details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Share-Based Incentive Compensation disclosure
Stock options vested at end of period, number (in shares)	8,470,852		8,470,852
Stock options vested at end of period, weighted average exercise price (per share)	$52.85		$52.85
Stock options vested at end of period, weighted average contractual life remaining (in years)			5 years 8 months 12 days
Stock options vested at end of period, aggregate intrinsic value	$270		$270
Stock options exercisable at end of period, number (in shares)	5,594,322		5,594,322
Stock options exercisable at end of period, weighted average exercise price (per share)	$47.06		$47.06
Stock options exercisable at end of period, weighted average contractual life remaining (in years)			4 years 4 months 24 days
Stock options exercisable at end of period, aggregate intrinsic value	211		211
Total compensation cost recognized in earnings for all share-based incentive compensation awards	29	26	99	92
Tax benefits recognized in earnings related to compensation costs	10	9	34	32
Total unrecognized compensation cost related to all nonvested share-based incentive compensation awards	$142		$142		$112
Weighted-average period of recognition for unrecognized compensation cost (in years)			1 year 9 months 18 days		1 year 8 months 12 days

Pension_Plans_Retirement_Benef2

Pension Plans, Retirement Benefits and Savings Plans (details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Plans [Member]
Defined benefit plan disclosure
Service cost	$30	$28	$89	$85
Interest cost on benefit obligation	33	34	99	103
Expected return on plan assets	-52	-46	-156	-140
Amortization of unrecognized net actuarial loss	27	22	80	67
Net periodic benefit cost, net benefit expense	38	38	112	115
Postretirement Benefit Plans [Member]
Defined benefit plan disclosure
Interest cost on benefit obligation	3	3	7	9
Expected return on plan assets				-1
Amortization of unrecognized prior service benefit	-1		-2
Net periodic benefit cost, net benefit expense	$2	$3	$5	$8

Contingencies_Commitments_and_1

Contingencies, Commitments and Guarantees (details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Billions, unless otherwise specified
Contingencies and Commitments disclosure
Unfunded commitments to private equity limited partnerships and real estate partnerships	$1.48	$1.27

Contingencies_Commitments_and_2

Contingencies, Commitments and Guarantees (details) - Loss Contingencies (USD $)	7 Months Ended		1 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2002	Mar. 22, 2010	Nov. 30, 2003	31-May-04
	item	item	Statutory and Hawaii Actions [Member]	Common Law Claims [Member]
			Maxiumum [Member]	Maxiumum [Member]
Loss Contingencies
Number of purported class action suits filed against TPC and other insurers in state court in West Virginia relative to asbestos direct action litigation	2
Lump-sum payment included in settlement			$412	$90
Number of remaining objectors to which the notice of the 1986 Orders were deemed insufficient to bar contribution claims against TPC		1

Contingencies_Commitments_and_3

Contingencies, Commitments and Guarantees (details) - Gain Contingencies (USD $)	0 Months Ended	35 Months Ended		0 Months Ended
In Millions, unless otherwise specified	Oct. 25, 2010	Sep. 30, 2013	Feb. 07, 2013	Jun. 26, 2013	Mar. 27, 2012	Jul. 26, 2011
	United States Fidelity & Guaranty Company v. American Re-Insurance Company, et al. [Member]	United States Fidelity & Guaranty Company v. American Re-Insurance Company, et al. [Member]	United States Fidelity & Guaranty Company v. American Re-Insurance Company, et al. [Member]	Safeco Insurance Company of America, et al v American International Group, Inc, et al [Member]	Safeco Insurance Company of America, et al v American International Group, Inc, et al [Member]	Safeco Insurance Company of America, et al v American International Group, Inc, et al [Member]
	item		item		item
Gain Contingencies
Number of other reinsurers beside American Re against which judgment was entered in a reinsurance dispute	3
Total settlement amount	$420	$487
Interest amount included in settlement award	169	236
Initial settement amount	251	251
Interest rate accruing on judgment not yet paid	9.00%	9.00%
Number of discrete issues modified in part by the summary judgment in reinsurance dispute			2
Number of parties who objected to the settlement and filed notices of appeal in workers' compensation matter					3
Preliminary class settlement amount approved by court in workers' compensation matter, amount payable by defendants						450
Payment received from settlement fund				91
Percentage of Company's allocated settlement received in workers' compensation matter				98.00%
Approximate amount anticipated for receipt from settlement				$2
Percentage of Company's allocated settlement still to be paid in workers' compensation matter				2.00%

Contingencies_Commitments_and_4

Contingencies, Commitments and Guarantees (details) - Guarantees (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Guarantees of certain investments and third-party loans [Member]
Guarantor obligations
Maximum amount of contingent obligation	$129
Amount indemnified by a third party	63
Guarantees of certain insurance policy obligations [Member]
Guarantor obligations
Maximum amount of contingent obligation	480
Amount indemnified by a third party	480
Indemnifications related to the sale of businesses [Member]
Guarantor obligations
Period range for term of indemnification provisions arising from sales of business entities, minimum (in months)	18 months
Maximum amount of contingent obligation	474
Amount recognized on balance sheet for contingent obligation	$9

Consolidating_Financial_Statem2

Consolidating Financial Statements (Unaudited) (details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Consolidating Financial Statements of The Travelers Companies, Inc. and Subsidiaries (Unaudited) disclosure
Amount of certain debt obligations of TPC that are unconditionally guaranteed by The Travelers Companies, Inc.	$700

Consolidating_Financial_Statem3

Consolidating Financial Statements (details) - Consolidating Statement of Income (Unaudited) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Consolidating Statement of Income
Premiums	$5,666		$5,666		$16,786		$16,718
Net investment income	657		722		2,014		2,200
Fee income	107		92		286		233
Net realized investment gains (losses)	-22	[1]	-2	[1]	155	[1]	12	[1]
Other revenues	44		34		213		100
Total revenues	6,452		6,512		19,454		19,263
Claims and claim adjustment expenses	3,297		3,359		9,980		10,509
Amortization of deferred acquisition costs	953		986		2,851		2,933
General and administrative expenses	934		904		2,780		2,681
Interest expense	91		93		269		285
Total claims and expenses	5,275		5,342		15,880		16,408
Income before income taxes	1,177		1,170		3,574		2,855
Income tax expense (benefit)	313		306		889		686
Net income	864		864		2,685		2,169
Total other-than-temporary impairment gains (losses)	0		17		-1		28
Other-than-temporary impairment losses recognized in net realized investment gains (losses)	-3		-3		-10		-11
Other-than-temporary impairment gains recognized in other comprehensive income	3		20		9		39
Reportable Legal Entities [Member] | TPC [Member]
Consolidating Statement of Income
Premiums	3,839		3,845		11,384		11,333
Net investment income	438		443		1,350		1,444
Fee income	106		92		284		232
Net realized investment gains (losses)	3		2		120		17
Other revenues	38		21		170		70
Total revenues	4,424		4,403		13,308		13,096
Claims and claim adjustment expenses	2,214		2,292		6,684		7,113
Amortization of deferred acquisition costs	640		660		1,912		1,953
General and administrative expenses	646		622		1,915		1,829
Interest expense	12		19		41		55
Total claims and expenses	3,512		3,593		10,552		10,950
Income before income taxes	912		810		2,756		2,146
Income tax expense (benefit)	248		212		700		536
Net income	664		598		2,056		1,610
Total other-than-temporary impairment gains (losses)	1		15		-3		15
Other-than-temporary impairment losses recognized in net realized investment gains (losses)	-2		-2		-7		-8
Other-than-temporary impairment gains recognized in other comprehensive income	3		17		4		23
Reportable Legal Entities [Member] | Other Subsidiaries [Member]
Consolidating Statement of Income
Premiums	1,827		1,821		5,402		5,385
Net investment income	217		277		659		750
Fee income	1				2		1
Net realized investment gains (losses)	-25		-4		34		-5
Other revenues	6		13		43		30
Total revenues	2,026		2,107		6,140		6,161
Claims and claim adjustment expenses	1,083		1,067		3,296		3,396
Amortization of deferred acquisition costs	313		326		939		980
General and administrative expenses	286		284		861		850
Total claims and expenses	1,682		1,677		5,096		5,226
Income before income taxes	344		430		1,044		935
Income tax expense (benefit)	93		120		269		231
Net income	251		310		775		704
Total other-than-temporary impairment gains (losses)	-1		2		2		13
Other-than-temporary impairment losses recognized in net realized investment gains (losses)	-1		-1		-3		-3
Other-than-temporary impairment gains recognized in other comprehensive income			3		5		16
Reportable Legal Entities [Member] | Travelers [Member]
Consolidating Statement of Income
Net investment income	2		2		5		6
Net realized investment gains (losses)					1
Total revenues	2		2		6		6
General and administrative expenses	2		-2		4		2
Interest expense	79		74		228		230
Total claims and expenses	81		72		232		232
Income before income taxes	-79		-70		-226		-226
Income tax expense (benefit)	-28		-26		-80		-81
Net income of subsidiaries	915		908		2,831		2,314
Net income	864		864		2,685		2,169
Eliminations [Member]
Consolidating Statement of Income
Net income of subsidiaries	-915		-908		-2,831		-2,314
Net income	($915)		($908)		($2,831)		($2,314)
[1]	Total other-than-temporary impairment (OTTI) gains (losses) were $0 million and $17 million for the three months ended September 30, 2013 and 2012, respectively, and $(1) million and $28 million for the nine months ended September 30, 2013 and 2012, respectively. Of total OTTI, credit losses of $(3) million for each of the three months ended September 30, 2013 and 2012, and $(10) million and $(11) million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in net realized investment gains (losses). In addition, unrealized gains from other changes in total OTTI of $3 million and $20 million for the three months ended September 30, 2013 and 2012, respectively, and $9 million and $39 million for the nine months ended September 30, 2013 and 2012, respectively, were recognized in other comprehensive income (loss) as part of change in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.

Consolidating_Financial_Statem4

Consolidating Financial Statements (details) - Consolidated Statement of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidating Statement of Comprehensive Income
Net income	$864	$864	$2,685	$2,169
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	-204	470	-2,370	609
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	-2	41	2	71
Net changes in benefit plan assets and obligations	24	22	78	64
Net changes in unrealized foreign currency translation	112	65	-57	43
Other comprehensive income (loss) before income taxes	-70	598	-2,347	787
Income tax expense (benefit)	-55	192	-816	256
Other comprehensive income (loss), net of taxes, before other comprehensive income (loss) of subsidiaries	-15	406	-1,531	531
Other comprehensive income (loss), net of taxes	-15	406	-1,531	531
Comprehensive income	849	1,270	1,154	2,700
Reportable Legal Entities [Member] | TPC [Member]
Consolidating Statement of Comprehensive Income
Net income	664	598	2,056	1,610
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	-138	338	-1,735	451
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	-1	28	4	49
Net changes in benefit plan assets and obligations		1	1	1
Net changes in unrealized foreign currency translation	26	13	-35	-20
Other comprehensive income (loss) before income taxes	-113	380	-1,765	481
Income tax expense (benefit)	-46	129	-616	165
Other comprehensive income (loss), net of taxes, before other comprehensive income (loss) of subsidiaries	-67	251	-1,149	316
Other comprehensive income (loss), net of taxes	-67	251	-1,149	316
Comprehensive income	597	849	907	1,926
Reportable Legal Entities [Member] | Other Subsidiaries [Member]
Consolidating Statement of Comprehensive Income
Net income	251	310	775	704
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	-71	127	-647	147
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	-1	13	-2	22
Net changes in benefit plan assets and obligations	-1		2
Net changes in unrealized foreign currency translation	86	52	-22	63
Other comprehensive income (loss) before income taxes	13	192	-669	232
Income tax expense (benefit)	-20	54	-231	65
Other comprehensive income (loss), net of taxes, before other comprehensive income (loss) of subsidiaries	33	138	-438	167
Other comprehensive income (loss), net of taxes	33	138	-438	167
Comprehensive income	284	448	337	871
Reportable Legal Entities [Member] | Travelers [Member]
Consolidating Statement of Comprehensive Income
Net income	864	864	2,685	2,169
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	5	5	12	11
Net changes in benefit plan assets and obligations	25	21	75	63
Other comprehensive income (loss) before income taxes	30	26	87	74
Income tax expense (benefit)	11	9	31	26
Other comprehensive income (loss), net of taxes, before other comprehensive income (loss) of subsidiaries	19	17	56	48
Other comprehensive income (loss) of subsidiaries	-34	389	-1,587	483
Other comprehensive income (loss), net of taxes	-15	406	-1,531	531
Comprehensive income	849	1,270	1,154	2,700
Eliminations [Member]
Consolidating Statement of Comprehensive Income
Net income	-915	-908	-2,831	-2,314
Other comprehensive income (loss) of subsidiaries	34	-389	1,587	-483
Other comprehensive income (loss), net of taxes	34	-389	1,587	-483
Comprehensive income	($881)	($1,297)	($1,244)	($2,797)

Consolidating_Financial_Statem5

Consolidating Financial Statements (details) - Consolidating Balance Sheet (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Consolidating Balance Sheet
Fixed maturities, available for sale, at fair value	$62,102	$65,393
Equity securities, available for sale, at fair value	708	645
Real estate investments	917	883
Short-term securities	5,379	3,483
Other investments	3,425	3,434
Total investments	72,531	73,838
Cash	295	330	220	214
Investment income accrued	673	752
Premiums receivable	6,113	5,872
Reinsurance recoverables	9,544	10,712
Ceded unearned premiums	1,015	856
Deferred acquisition costs	1,802	1,792
Deferred taxes	321
Contractholder receivables	4,450	4,806
Goodwill	3,365	3,365
Other intangible assets	347	381
Other assets	2,229	2,234
Total assets	102,685	104,938
Claims and claim adjustment expense reserves	49,153	50,922
Unearned premium reserves	11,716	11,241
Contractholder payables	4,450	4,806
Payables for reinsurance premiums	438	346
Deferred taxes		338
Debt	6,346	6,350
Other liabilities	5,771	5,530
Total liabilities	77,874	79,533
Common stock	21,425	21,161	21,085	20,732
Retained earnings	23,485	21,352	21,226	19,579
Accumulated other comprehensive income	705	2,236	2,536	2,005
Treasury stock, at cost	-20,804	-19,344	-18,942	-17,839
Total shareholders' equity	24,811	25,405	25,905
Total liabilities and shareholders' equity	102,685	104,938
Fixed maturities, available for sale, amortized cost	59,960	60,829
Equity securities, available for sale, cost	470	462
Common stock, shares authorized	1,750	1,750
Common stock, shares issued	364.1	377.4
Common stock, shares outstanding	364.1	377.4	382	392.8
Treasury stock, at cost, shares	390.1	372.3
Reportable Legal Entities [Member] | TPC [Member]
Consolidating Balance Sheet
Fixed maturities, available for sale, at fair value	42,493	44,336
Equity securities, available for sale, at fair value	159	153
Real estate investments	32	33
Short-term securities	2,750	1,187
Other investments	2,437	2,443
Total investments	47,871	48,152
Cash	130	177	118	114
Investment income accrued	457	507
Premiums receivable	4,107	3,944
Reinsurance recoverables	6,153	7,112
Ceded unearned premiums	858	698
Deferred acquisition costs	1,578	1,560
Deferred taxes	159
Contractholder receivables	3,253	3,540
Goodwill	2,411	2,411
Other intangible assets	245	268
Other assets	1,882	1,930
Total assets	69,104	70,299
Claims and claim adjustment expense reserves	32,232	33,598
Unearned premium reserves	8,136	7,751
Contractholder payables	3,253	3,540
Payables for reinsurance premiums	219	151
Deferred taxes		316
Debt	692	1,191
Other liabilities	4,106	4,107
Total liabilities	48,638	50,654
Additional paid-in capital	11,635	11,135
Retained earnings	7,873	6,404
Accumulated other comprehensive income	958	2,106
Total shareholders' equity	20,466	19,645
Total liabilities and shareholders' equity	69,104	70,299
Reportable Legal Entities [Member] | Other Subsidiaries [Member]
Consolidating Balance Sheet
Fixed maturities, available for sale, at fair value	19,572	21,019
Equity securities, available for sale, at fair value	428	386
Real estate investments	885	850
Short-term securities	833	338
Other investments	987	990
Total investments	22,705	23,583
Cash	163	151	101	98
Investment income accrued	210	240
Premiums receivable	2,006	1,928
Reinsurance recoverables	3,391	3,600
Ceded unearned premiums	157	158
Deferred acquisition costs	224	232
Deferred taxes	55
Contractholder receivables	1,197	1,266
Goodwill	954	954
Other intangible assets	102	113
Other assets	327	286
Total assets	31,491	32,511
Claims and claim adjustment expense reserves	16,921	17,324
Unearned premium reserves	3,580	3,490
Contractholder payables	1,197	1,266
Payables for reinsurance premiums	219	195
Deferred taxes		123
Other liabilities	1,195	1,186
Total liabilities	23,112	23,584
Common stock	390	390
Additional paid-in capital	6,501	6,501
Retained earnings	1,003	1,113
Accumulated other comprehensive income	485	923
Total shareholders' equity	8,379	8,927
Total liabilities and shareholders' equity	31,491	32,511
Reportable Legal Entities [Member] | Travelers [Member]
Consolidating Balance Sheet
Fixed maturities, available for sale, at fair value	37	38
Equity securities, available for sale, at fair value	121	106
Short-term securities	1,796	1,958
Other investments	1	1
Total investments	1,955	2,103
Cash	2	2	1	2
Investment income accrued	6	5
Deferred taxes	107
Investment in subsidiaries	28,835	28,562
Other assets	20	18
Total assets	30,925	30,690
Deferred taxes		-101
Debt	5,654	5,159
Other liabilities	470	237
Total liabilities	6,124	5,295
Common stock	21,425	21,161
Retained earnings	23,475	21,342
Accumulated other comprehensive income	705	2,236
Treasury stock, at cost	-20,804	-19,344
Total shareholders' equity	24,801	25,395
Total liabilities and shareholders' equity	30,925	30,690
Eliminations [Member]
Consolidating Balance Sheet
Investment in subsidiaries	-28,835	-28,562
Total assets	-28,835	-28,562
Common stock	-390	-390
Additional paid-in capital	-18,136	-17,636
Retained earnings	-8,866	-7,507
Accumulated other comprehensive income	-1,443	-3,029
Total shareholders' equity	-28,835	-28,562
Total liabilities and shareholders' equity	($28,835)	($28,562)

Consolidating_Financial_Statem6

Consolidating Financial Statements (details) - Consolidating Statement of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Consolidating Statement of Cash Flows
Net income	$2,685	$2,169
Net adjustments to reconcile net income to net cash provided by operating activities	204	597
Net cash provided by operating activities	2,889	2,766
Proceeds from maturities of fixed maturities	5,917	5,855
Proceeds from sales of investments, fixed maturities	1,160	724
Proceeds from sales of investments, equity securities	57	31
Proceeds from sales of investments, real estate investments		3
Proceeds from sales of investments, other investments	545	516
Purchases of investments, fixed maturities	-6,492	-7,677
Purchases of investments, equity securities	-50	-39
Purchases of investments, real estate investments	-65	-62
Purchases of investments, other investments	-312	-292
Net sales (purchases) of short-term securities	-1,893	-41
Securities transactions in course of settlement	280	53
Other investing activities	-254	-229
Net cash used in investing activities	-1,107	-1,158
Payment of debt	-500	-258
Issuance of debt	494
Dividends paid to shareholders	-549	-519
Issuance of common stock - employee share options	158	247
Treasury stock acquired - share repurchase authorization	-1,400	-1,056
Treasury stock acquired - net employee share-based compensation	-60	-52
Excess tax benefits from share-based payment arrangements	43	32
Net cash used in financing activities	-1,814	-1,606
Effect of exchange rate changes on cash	-3	4
Net increase (decrease) in cash	-35	6
Cash at beginning of year	330	214
Cash at end of period	295	220
Income taxes paid (received)	724	310
Interest paid	206	226
Reportable Legal Entities [Member] | TPC [Member]
Consolidating Statement of Cash Flows
Net income	2,056	1,610
Net adjustments to reconcile net income to net cash provided by operating activities	-348	552
Net cash provided by operating activities	1,708	2,162
Proceeds from maturities of fixed maturities	4,096	4,123
Proceeds from sales of investments, fixed maturities	590	494
Proceeds from sales of investments, equity securities	21	18
Proceeds from sales of investments, other investments	337	389
Purchases of investments, fixed maturities	-4,339	-5,645
Purchases of investments, equity securities	-20	-1
Purchases of investments, other investments	-222	-187
Net sales (purchases) of short-term securities	-1,563	-306
Securities transactions in course of settlement	182	46
Other investing activities	-250	-235
Net cash used in investing activities	-1,168	-1,304
Payment of debt	-500
Capital contributions	500
Dividends paid to parent company	-587	-854
Net cash used in financing activities	-587	-854
Net increase (decrease) in cash	-47	4
Cash at beginning of year	177	114
Cash at end of period	130	118
Income taxes paid (received)	691	343
Interest paid	52	65
Reportable Legal Entities [Member] | Other Subsidiaries [Member]
Consolidating Statement of Cash Flows
Net income	775	704
Net adjustments to reconcile net income to net cash provided by operating activities	224	-136
Net cash provided by operating activities	999	568
Proceeds from maturities of fixed maturities	1,820	1,731
Proceeds from sales of investments, fixed maturities	565	228
Proceeds from sales of investments, equity securities	36	13
Proceeds from sales of investments, real estate investments		3
Proceeds from sales of investments, other investments	208	127
Purchases of investments, fixed maturities	-2,146	-2,023
Purchases of investments, equity securities	-29	-37
Purchases of investments, real estate investments	-65	-62
Purchases of investments, other investments	-90	-105
Net sales (purchases) of short-term securities	-492	-99
Securities transactions in course of settlement	98	7
Other investing activities	-4	6
Net cash used in investing activities	-99	-211
Dividends paid to parent company	-885	-358
Net cash used in financing activities	-885	-358
Effect of exchange rate changes on cash	-3	4
Net increase (decrease) in cash	12	3
Cash at beginning of year	151	98
Cash at end of period	163	101
Income taxes paid (received)	236	110
Reportable Legal Entities [Member] | Travelers [Member]
Consolidating Statement of Cash Flows
Net income	2,685	2,169
Net adjustments to reconcile net income to net cash provided by operating activities	-1,531	-921
Net cash provided by operating activities	1,154	1,248
Proceeds from maturities of fixed maturities	1	1
Proceeds from sales of investments, fixed maturities	5	2
Purchases of investments, fixed maturities	-7	-9
Purchases of investments, equity securities	-1	-1
Net sales (purchases) of short-term securities	162	364
Net cash used in investing activities	160	357
Payment of debt		-258
Issuance of debt	494
Dividends paid to shareholders	-549	-519
Issuance of common stock - employee share options	158	247
Treasury stock acquired - share repurchase authorization	-1,400	-1,056
Treasury stock acquired - net employee share-based compensation	-60	-52
Excess tax benefits from share-based payment arrangements	43	32
Net cash used in financing activities	-1,314	-1,606
Net increase (decrease) in cash		-1
Cash at beginning of year	2	2
Cash at end of period	2	1
Income taxes paid (received)	-203	-143
Interest paid	154	161
Eliminations [Member]
Consolidating Statement of Cash Flows
Net income	-2,831	-2,314
Net adjustments to reconcile net income to net cash provided by operating activities	1,859	1,102
Net cash provided by operating activities	-972	-1,212
Capital contributions	-500
Dividends paid to parent company	1,472	1,212
Net cash used in financing activities	$972	$1,212