Insurance Claim Reserves (tables)

12 Months Ended

Dec. 31, 2017

Insurance Claim Reserves disclosure

Claims and claim adjustment expense reserves [Table Text Block]

(at December 31, in millions)	2017		2016
Property-casualty	$	49,633	$	47,929
Accident and health		17		20
Total	$	49,650	$	47,949

Reconciliation of beginning and ending property casualty reserve balances for claims and claim adjustment expenses [Table Text Block]

(at and for the year ended December 31, in millions)	2017			2016			2015
Claims and claim adjustment expense reserves at beginning of year	$	47,929		$	48,272		$	49,824
Less reinsurance recoverables on unpaid losses		7,981			8,449			8,788
Net reserves at beginning of year		39,948			39,823			41,036
Estimated claims and claim adjustment expenses for claims arising in the current year		17,846			15,675			14,471
Estimated decrease in claims and claim adjustment expenses for claims arising in prior years		(458	)		(680	)		(817	)
Total increases		17,388			14,995			13,654
Claims and claim adjustment expense payments for claims arising in:
Current year		7,335			6,220			5,725
Prior years		8,708			8,576			8,749
Total payments		16,043			14,796			14,474
Acquisition(1)		—			—			2
Unrealized foreign exchange loss (gain)		217			(74	)		(395	)
Net reserves at end of year		41,510			39,948			39,823
Plus reinsurance recoverables on unpaid losses		8,123			7,981			8,449
Claims and claim adjustment expense reserves at end of year	$	49,633		$	47,929		$	48,272

(1)

Amount represents acquired net claims and claim adjustment expense reserves of Travelers Participações em Seguros Brasil S.A. at October 1, 2015.

Summary of claims and claim adjustment expense reserves, including certain components, for the Company's major product lines by reporting segment [Table Text Block]

(at December 31, 2017, in millions)	Net Undiscounted Claims and Claim Adjustment Expense Reserves		Discount (Net of Reinsurance)			Subtotal: Net Claims and Claim Adjustment Expense Reserves		Reinsurance Recoverables on Unpaid Losses(4)		Claims and Claim Adjustment Expense Reserves
Business Insurance
General liability	$	6,852	$	(163	)	$	6,689	$	748	$	7,437
Commercial property		1,040		—			1,040		358		1,398
Commercial multi-peril		3,487		—			3,487		131		3,618
Commercial automobile		2,406		—			2,406		269		2,675
Workers' compensation(1)		15,812		(862	)		14,950		703		15,653
Bond & Specialty Insurance
General liability		1,995		—			1,995		130		2,125
Fidelity and surety		460		—			460		19		479
Personal Insurance
Automobile		2,647		—			2,647		450		3,097
Homeowners (excluding Other)		1,125		—			1,125		2		1,127
International—Canada		760		—			760		27		787
Subtotal—claims and allocated claim adjustment expenses for the products presented in the development tables below		36,584		(1,025	)		35,559		2,837		38,396
Other insurance contracts(2)		3,858		(5	)		3,853		2,130		5,983
Unallocated loss adjustment expense reserves		2,042		—			2,042		36		2,078
Structured settlements(3)		—		—			—		3,106		3,106
Other		56		—			56		14		70
Total property-casualty		42,540		(1,030	)		41,510		8,123		49,633
Accident and health		—		—			—		17		17
Total	$	42,540	$	(1,030	)	$	41,510	$	8,140	$	49,650

(1)

Net discount amount includes discount of $72 million on reinsurance recoverables for long-term disability and annuity claim payments.

(2)

Primarily includes residual market, international (other than operations in Canada within the Personal Insurance segment) and runoff assumed reinsurance business.

(3)

Includes structured settlements in cases where the Company did not receive a release from the claimant.

(4)

Total reinsurance recoverables (on paid and unpaid losses) at December 31, 2017 were $8.31 billion.

Allocated claim adjustment expense, by accident year, on a historical basis for incurred and paid claims on an undiscounted, net of reinsurance basis [Table Text Block]

Business Insurance

General Liability

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	1,143	$	1,209	$	1,222	$	1,079	$	1,041	$	994	$	946	$	931	$	935	$	936	$	81		25,462
2009				1,060		1,071		1,028		960		869		837		809		796		783		71		25,551
2010						1,028		1,031		1,021		959		927		912		918		908		90		27,810
2011								1,004		1,074		1,065		998		972		935		913		93		27,327
2012										989		985		935		913		892		905		111		24,632
2013												965		975		958		940		927		166		22,200
2014														976		989		983		948		255		21,703
2015																998		956		923		361		20,236
2016																		1,075		1,058		655		17,680
2017																				1,133		968		12,538
																Total			$	9,434
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	35	$	154	$	359	$	497	$	615	$	694	$	734	$	759	$	799	$	817
2009				35		167		314		446		543		613		643		667		689
2010						35		139		324		487		629		702		756		781
2011								47		187		355		539		660		725		762		Liability for Claims
2012										32		150		295		489		589		699		And Allocated Claim
2013												35		175		363		498		639		Adjustment Expenses,
2014														37		163		321		515		Net of Reinsurance
2015																36		137		336
2016																		35		191		2008 -		Before
2017																				40		2017		2008
																Total			$	5,469	$	3,965	$	2,887
																				Total net liability			$	6,852

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		3.9	%		13.7	%		19.3	%		18.0	%		13.4	%		8.9	%		4.6	%		2.8	%		3.6	%		1.9	%

Commercial Property

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	789	$	755	$	737	$	731	$	729	$	6		22,165
2014				936		860		836		835		10		21,548
2015						786		750		741		15		20,069
2016								896		863		53		22,055
2017										1,209		166		21,686
Total									$	4,377
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	389	$	610	$	683	$	703	$	713		Adjustment Expenses,
2014				464		710		775		803		Net of Reinsurance
2015						376		615		681
2016								441		685		2013 -		Before
2017										618		2017		2013
Total									$	3,500	$	877	$	163
										Total net liability			$	1,040

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		52.3	%		30.1	%		8.8	%		3.0	%		1.5	%

Commercial Multi-Peril

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	1,725	$	1,674	$	1,683	$	1,688	$	1,674	$	1,684	$	1,674	$	1,688	$	1,681	$	1,680	$	45		108,522
2009				1,484		1,506		1,501		1,498		1,511		1,514		1,514		1,509		1,500		30		103,307
2010						1,711		1,826		1,832		1,861		1,895		1,892		1,898		1,885		40		111,756
2011								2,235		2,244		2,269		2,286		2,296		2,287		2,283		52		125,522
2012										1,885		1,883		1,903		1,888		1,888		1,867		58		104,646
2013												1,615		1,623		1,620		1,609		1,591		68		83,371
2014														1,663		1,627		1,625		1,617		99		77,731
2015																1,568		1,625		1,593		191		70,291
2016																		1,662		1,623		358		65,985
2017																				1,872		617		59,838
																Total			$	17,511
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	712	$	1,103	$	1,264	$	1,396	$	1,490	$	1,551	$	1,581	$	1,602	$	1,617	$	1,625
2009				603		958		1,121		1,264		1,360		1,408		1,436		1,449		1,457
2010						709		1,180		1,395		1,579		1,698		1,763		1,798		1,819
2011								1,060		1,573		1,803		1,979		2,088		2,156		2,193		Liability for Claims
2012										795		1,246		1,424		1,590		1,699		1,752		And Allocated Claim
2013												644		987		1,167		1,304		1,410		Adjustment Expenses,
2014														628		956		1,154		1,328		Net of Reinsurance
2015																595		970		1,144
2016																		585		950		2008 -		Before
2017																				716		2017		2008
Total																			$	14,394	$	3,117	$	370
																				Total net liability			$	3,487

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		40.0	%		22.9	%		10.7	%		9.0	%		5.9	%		3.2	%		1.8	%		1.1	%		0.7	%		0.5	%

Commercial Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	1,235	$	1,236	$	1,240	$	1,245	$	1,254	$	27		197,224
2014				1,165		1,166		1,168		1,184		62		184,476
2015						1,198		1,215		1,248		126		181,269
2016								1,290		1,319		293		190,036
2017										1,399		588		178,825
Total									$	6,404
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	435	$	675	$	884	$	1,039	$	1,154		Adjustment Expenses,
2014				397		618		821		987		Net of Reinsurance
2015						409		658		896
2016								416		698		2013 -		Before
2017										460		2017		2013
Total									$	4,195	$	2,209	$	197
										Total net liability			$	2,406

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		33.1	%		19.8	%		17.6	%		13.2	%		9.2	%

Workers' Compensation

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	1,714	$	1,745	$	1,734	$	1,683	$	1,639	$	1,634	$	1,621	$	1,617		1,617	$	1,607	$	219		107,851
2009				1,799		1,778		1,746		1,753		1,753		1,766		1,775		1,750		1,736		241		104,348
2010						1,886		2,042		2,035		2,056		2,049		2,052		2,055		2,021		298		116,911
2011								2,284		2,303		2,347		2,350		2,379		2,385		2,363		380		136,325
2012										2,447		2,456		2,457		2,456		2,445		2,453		474		136,451
2013												2,553		2,545		2,540		2,506		2,463		558		128,957
2014														2,554		2,553		2,547		2,476		681		123,713
2015																2,644		2,585		2,505		906		121,855
2016																		2,768		2,690		1,128		121,455
2017																				2,779		1,747		107,131
																Total			$	23,093
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	274	$	571	$	752	$	875	$	961	$	1,036	$	1,088	$	1,130	$	1,162	$	1,189
2009				288		623		828		961		1,065		1,137		1,193		1,235		1,274
2010						341		750		978		1,133		1,246		1,321		1,385		1,430
2011								420		911		1,185		1,365		1,487		1,583		1,652		Liability for Claims
2012										443		940		1,217		1,394		1,536		1,629		And Allocated Claim
2013												458		954		1,237		1,413		1,525		Adjustment Expenses,
2014														455		944		1,224		1,399		Net of Reinsurance
2015																430		893		1,154
2016																		421		873		2008 -		Before
2017																				433		2017		2018
Total																			$	12,558	$	10,535	$	5,277
																				Total net liability			$	15,812

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		17.2	%		19.3	%		11.3	%		7.4	%		5.4	%		4.1	%		3.1	%		2.4	%		2.1	%		1.7	%

Bond & Specialty Insurance

General Liability

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	579	$	769	$	743	$	697	$	716	$	712	$	672	$	643	$	631	$	637	$	18		6,468
2009				592		624		665		686		680		660		655		641		631		16		6,290
2010						571		612		679		679		661		668		653		653		16		5,667
2011								565		596		639		632		601		545		520		3		5,207
2012										538		591		614		605		601		599		126		4,838
2013												510		565		606		630		654		200		4,418
2014														549		571		563		518		123		4,290
2015																528		524		486		170		4,060
2016																		512		511		250		3,976
2017																				534		415		2,811
																Total			$	5,743
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	47	$	157	$	281	$	387	$	471	$	529	$	562	$	579	$	590	$	593
2009				36		167		310		390		460		497		563		592		595
2010						33		152		291		396		482		565		597		623
2011								33		143		249		324		414		447		476		Liability for Claims
2012										38		160		255		342		383		419		And Allocated Claim
2013												34		154		252		352		400		Adjustment Expenses,
2014														38		150		239		312		Net of Reinsurance
2015																38		141		234
2016																		30		141		2008 -		Before
2017																				38		2017		2008
																Total			$	3,831	$	1,912	$	83
																				Total net liability			$	1,995

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		6.4	%		20.1	%		18.9	%		14.8	%		11.5	%		8.0	%		6.6	%		3.8	%		1.1	%		0.4	%

Fidelity and Surety

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	240	$	246	$	199	$	146	$	141	$	—		1,014
2014				223		212		165		136		3		1,042
2015						217		191		179		60		810
2016								226		239		45		823
2017										244		132		611
Total									$	939
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	37	$	113	$	128	$	131	$	135		Adjustment Expenses,
2014				58		96		111		127		Net of Reinsurance
2015						32		75		87
2016								54		121		2013 -		Before
2017										70		2017		2013
Total									$	540	$	399	$	61
										Total net liability			$	460

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		27.5	%		33.6	%		9.2	%		7.5	%		2.6	%

Personal Insurance

Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	2,108	$	2,095	$	2,049	$	2,044	$	2,039	$	16		694,733
2014				2,014		1,994		1,981		1,985		33		670,329
2015						2,186		2,244		2,236		101		757,333
2016								2,779		2,791		279		919,301
2017										3,323		844		970,143
Total									$	12,374
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	1,251	$	1,628	$	1,814	$	1,935	$	1,992		Adjustment Expenses,
2014				1,193		1,564		1,763		1,879		Net of Reinsurance
2015						1,319		1,768		1,985
2016								1,610		2,203		2013 -		Before
2017										1,912		2017		2013
Total									$	9,971	$	2,403	$	244
										Total net liability			$	2,647

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		59.1	%		19.6	%		9.6	%		5.9	%		2.8	%

Homeowners (excluding Other)

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	1,488	$	1,397	$	1,365	$	1,375	$	1,376	$	3		149,430
2014				1,515		1,450		1,453		1,457		6		151,664
2015						1,438		1,454		1,461		17		144,930
2016								1,556		1,547		69		143,163
2017										2,312		457		152,146
		Total							$	8,153
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	994	$	1,269	$	1,317	$	1,344	$	1,360		Adjustment Expenses,
2014				1,053		1,338		1,402		1,425		Net of Reinsurance
2015						994		1,333		1,395
2016								1,049		1,392		2013 -		Before
2017										1,471		2017		2013
Total									$	7,043	$	1,110	$	15
										Total net liability			$	1,125

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		68.8	%		21.2	%		4.0	%		1.8	%		1.2	%

International—Canada

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	429	$	433	$	421	$	422	$	428	$	434	$	428	$	423	$	424	$	424	$	—		54,281
2009				494		481		490		496		505		496		488		489		481		4		55,162
2010						503		505		516		531		519		510		506		499		7		54,924
2011								475		453		461		457		449		442		436		13		55,788
2012										450		427		429		412		410		393		23		51,215
2013												501		494		485		473		459		24		54,248
2014														443		459		460		448		30		52,263
2015																373		373		372		43		45,182
2016																		373		423		55		45,500
2017																				358		44		43,885
																Total			$	4,293
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	184	$	281	$	315	$	340	$	363	$	386	$	401	$	409	$	413	$	416
2009				205		308		351		380		412		438		456		468		471
2010						198		302		341		382		413		445		463		475
2011								182		258		290		325		361		384		403		Liability for Claims
2012										171		239		271		298		327		345		And Allocated Claim
2013												200		281		314		348		382		Adjustment Expenses,
2014														196		274		312		342		Net of Reinsurance
2015																167		234		262
2016																		218		293		2008 -		Before
2017																				188		2017		2008
Total																			$	3,577	$	716	$	44
																				Total net liability			$	760

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		44.7	%		18.9	%		7.9	%		7.0	%		6.9	%		5.4	%		3.7	%		2.2	%		0.8	%		0.7	%

Historical average annual percentage payout of incurred claims by age of accident year [Table Text Block]

Business Insurance

General Liability

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	1,143	$	1,209	$	1,222	$	1,079	$	1,041	$	994	$	946	$	931	$	935	$	936	$	81		25,462
2009				1,060		1,071		1,028		960		869		837		809		796		783		71		25,551
2010						1,028		1,031		1,021		959		927		912		918		908		90		27,810
2011								1,004		1,074		1,065		998		972		935		913		93		27,327
2012										989		985		935		913		892		905		111		24,632
2013												965		975		958		940		927		166		22,200
2014														976		989		983		948		255		21,703
2015																998		956		923		361		20,236
2016																		1,075		1,058		655		17,680
2017																				1,133		968		12,538
																Total			$	9,434
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	35	$	154	$	359	$	497	$	615	$	694	$	734	$	759	$	799	$	817
2009				35		167		314		446		543		613		643		667		689
2010						35		139		324		487		629		702		756		781
2011								47		187		355		539		660		725		762		Liability for Claims
2012										32		150		295		489		589		699		And Allocated Claim
2013												35		175		363		498		639		Adjustment Expenses,
2014														37		163		321		515		Net of Reinsurance
2015																36		137		336
2016																		35		191		2008 -		Before
2017																				40		2017		2008
																Total			$	5,469	$	3,965	$	2,887
																				Total net liability			$	6,852

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		3.9	%		13.7	%		19.3	%		18.0	%		13.4	%		8.9	%		4.6	%		2.8	%		3.6	%		1.9	%

Commercial Property

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	789	$	755	$	737	$	731	$	729	$	6		22,165
2014				936		860		836		835		10		21,548
2015						786		750		741		15		20,069
2016								896		863		53		22,055
2017										1,209		166		21,686
Total									$	4,377
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	389	$	610	$	683	$	703	$	713		Adjustment Expenses,
2014				464		710		775		803		Net of Reinsurance
2015						376		615		681
2016								441		685		2013 -		Before
2017										618		2017		2013
Total									$	3,500	$	877	$	163
										Total net liability			$	1,040

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		52.3	%		30.1	%		8.8	%		3.0	%		1.5	%

Commercial Multi-Peril

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	1,725	$	1,674	$	1,683	$	1,688	$	1,674	$	1,684	$	1,674	$	1,688	$	1,681	$	1,680	$	45		108,522
2009				1,484		1,506		1,501		1,498		1,511		1,514		1,514		1,509		1,500		30		103,307
2010						1,711		1,826		1,832		1,861		1,895		1,892		1,898		1,885		40		111,756
2011								2,235		2,244		2,269		2,286		2,296		2,287		2,283		52		125,522
2012										1,885		1,883		1,903		1,888		1,888		1,867		58		104,646
2013												1,615		1,623		1,620		1,609		1,591		68		83,371
2014														1,663		1,627		1,625		1,617		99		77,731
2015																1,568		1,625		1,593		191		70,291
2016																		1,662		1,623		358		65,985
2017																				1,872		617		59,838
																Total			$	17,511
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	712	$	1,103	$	1,264	$	1,396	$	1,490	$	1,551	$	1,581	$	1,602	$	1,617	$	1,625
2009				603		958		1,121		1,264		1,360		1,408		1,436		1,449		1,457
2010						709		1,180		1,395		1,579		1,698		1,763		1,798		1,819
2011								1,060		1,573		1,803		1,979		2,088		2,156		2,193		Liability for Claims
2012										795		1,246		1,424		1,590		1,699		1,752		And Allocated Claim
2013												644		987		1,167		1,304		1,410		Adjustment Expenses,
2014														628		956		1,154		1,328		Net of Reinsurance
2015																595		970		1,144
2016																		585		950		2008 -		Before
2017																				716		2017		2008
Total																			$	14,394	$	3,117	$	370
																				Total net liability			$	3,487

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		40.0	%		22.9	%		10.7	%		9.0	%		5.9	%		3.2	%		1.8	%		1.1	%		0.7	%		0.5	%

Commercial Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	1,235	$	1,236	$	1,240	$	1,245	$	1,254	$	27		197,224
2014				1,165		1,166		1,168		1,184		62		184,476
2015						1,198		1,215		1,248		126		181,269
2016								1,290		1,319		293		190,036
2017										1,399		588		178,825
Total									$	6,404
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	435	$	675	$	884	$	1,039	$	1,154		Adjustment Expenses,
2014				397		618		821		987		Net of Reinsurance
2015						409		658		896
2016								416		698		2013 -		Before
2017										460		2017		2013
Total									$	4,195	$	2,209	$	197
										Total net liability			$	2,406

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		33.1	%		19.8	%		17.6	%		13.2	%		9.2	%

Workers' Compensation

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	1,714	$	1,745	$	1,734	$	1,683	$	1,639	$	1,634	$	1,621	$	1,617		1,617	$	1,607	$	219		107,851
2009				1,799		1,778		1,746		1,753		1,753		1,766		1,775		1,750		1,736		241		104,348
2010						1,886		2,042		2,035		2,056		2,049		2,052		2,055		2,021		298		116,911
2011								2,284		2,303		2,347		2,350		2,379		2,385		2,363		380		136,325
2012										2,447		2,456		2,457		2,456		2,445		2,453		474		136,451
2013												2,553		2,545		2,540		2,506		2,463		558		128,957
2014														2,554		2,553		2,547		2,476		681		123,713
2015																2,644		2,585		2,505		906		121,855
2016																		2,768		2,690		1,128		121,455
2017																				2,779		1,747		107,131
																Total			$	23,093
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	274	$	571	$	752	$	875	$	961	$	1,036	$	1,088	$	1,130	$	1,162	$	1,189
2009				288		623		828		961		1,065		1,137		1,193		1,235		1,274
2010						341		750		978		1,133		1,246		1,321		1,385		1,430
2011								420		911		1,185		1,365		1,487		1,583		1,652		Liability for Claims
2012										443		940		1,217		1,394		1,536		1,629		And Allocated Claim
2013												458		954		1,237		1,413		1,525		Adjustment Expenses,
2014														455		944		1,224		1,399		Net of Reinsurance
2015																430		893		1,154
2016																		421		873		2008 -		Before
2017																				433		2017		2018
Total																			$	12,558	$	10,535	$	5,277
																				Total net liability			$	15,812

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		17.2	%		19.3	%		11.3	%		7.4	%		5.4	%		4.1	%		3.1	%		2.4	%		2.1	%		1.7	%

Bond & Specialty Insurance

General Liability

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	579	$	769	$	743	$	697	$	716	$	712	$	672	$	643	$	631	$	637	$	18		6,468
2009				592		624		665		686		680		660		655		641		631		16		6,290
2010						571		612		679		679		661		668		653		653		16		5,667
2011								565		596		639		632		601		545		520		3		5,207
2012										538		591		614		605		601		599		126		4,838
2013												510		565		606		630		654		200		4,418
2014														549		571		563		518		123		4,290
2015																528		524		486		170		4,060
2016																		512		511		250		3,976
2017																				534		415		2,811
																Total			$	5,743
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	47	$	157	$	281	$	387	$	471	$	529	$	562	$	579	$	590	$	593
2009				36		167		310		390		460		497		563		592		595
2010						33		152		291		396		482		565		597		623
2011								33		143		249		324		414		447		476		Liability for Claims
2012										38		160		255		342		383		419		And Allocated Claim
2013												34		154		252		352		400		Adjustment Expenses,
2014														38		150		239		312		Net of Reinsurance
2015																38		141		234
2016																		30		141		2008 -		Before
2017																				38		2017		2008
																Total			$	3,831	$	1,912	$	83
																				Total net liability			$	1,995

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		6.4	%		20.1	%		18.9	%		14.8	%		11.5	%		8.0	%		6.6	%		3.8	%		1.1	%		0.4	%

Fidelity and Surety

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	240	$	246	$	199	$	146	$	141	$	—		1,014
2014				223		212		165		136		3		1,042
2015						217		191		179		60		810
2016								226		239		45		823
2017										244		132		611
Total									$	939
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	37	$	113	$	128	$	131	$	135		Adjustment Expenses,
2014				58		96		111		127		Net of Reinsurance
2015						32		75		87
2016								54		121		2013 -		Before
2017										70		2017		2013
Total									$	540	$	399	$	61
										Total net liability			$	460

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		27.5	%		33.6	%		9.2	%		7.5	%		2.6	%

Personal Insurance

Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	2,108	$	2,095	$	2,049	$	2,044	$	2,039	$	16		694,733
2014				2,014		1,994		1,981		1,985		33		670,329
2015						2,186		2,244		2,236		101		757,333
2016								2,779		2,791		279		919,301
2017										3,323		844		970,143
Total									$	12,374
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	1,251	$	1,628	$	1,814	$	1,935	$	1,992		Adjustment Expenses,
2014				1,193		1,564		1,763		1,879		Net of Reinsurance
2015						1,319		1,768		1,985
2016								1,610		2,203		2013 -		Before
2017										1,912		2017		2013
Total									$	9,971	$	2,403	$	244
										Total net liability			$	2,647

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		59.1	%		19.6	%		9.6	%		5.9	%		2.8	%

Homeowners (excluding Other)

	(dollars in millions)
	For the Years Ended December 31,
	2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
		Unaudited
												IBNR		Cumulative
												Reserves		Number of
												Dec. 31,		Reported
Accident Year												2017		Claims
2013	$	1,488	$	1,397	$	1,365	$	1,375	$	1,376	$	3		149,430
2014				1,515		1,450		1,453		1,457		6		151,664
2015						1,438		1,454		1,461		17		144,930
2016								1,556		1,547		69		143,163
2017										2,312		457		152,146
		Total							$	8,153
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year												Liability for Claims And Allocated Claim
2013	$	994	$	1,269	$	1,317	$	1,344	$	1,360		Adjustment Expenses,
2014				1,053		1,338		1,402		1,425		Net of Reinsurance
2015						994		1,333		1,395
2016								1,049		1,392		2013 -		Before
2017										1,471		2017		2013
Total									$	7,043	$	1,110	$	15
										Total net liability			$	1,125

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5
		68.8	%		21.2	%		4.0	%		1.8	%		1.2	%

International—Canada

	(dollars in millions)
	For the Years Ended December 31,
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
																						IBNR		Cumulative
																						Reserves		Number of
																						Dec. 31,		Reported
Accident Year																						2017		Claims
2008	$	429	$	433	$	421	$	422	$	428	$	434	$	428	$	423	$	424	$	424	$	—		54,281
2009				494		481		490		496		505		496		488		489		481		4		55,162
2010						503		505		516		531		519		510		506		499		7		54,924
2011								475		453		461		457		449		442		436		13		55,788
2012										450		427		429		412		410		393		23		51,215
2013												501		494		485		473		459		24		54,248
2014														443		459		460		448		30		52,263
2015																373		373		372		43		45,182
2016																		373		423		55		45,500
2017																				358		44		43,885
																Total			$	4,293
	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
		Unaudited
Accident Year
2008	$	184	$	281	$	315	$	340	$	363	$	386	$	401	$	409	$	413	$	416
2009				205		308		351		380		412		438		456		468		471
2010						198		302		341		382		413		445		463		475
2011								182		258		290		325		361		384		403		Liability for Claims
2012										171		239		271		298		327		345		And Allocated Claim
2013												200		281		314		348		382		Adjustment Expenses,
2014														196		274		312		342		Net of Reinsurance
2015																167		234		262
2016																		218		293		2008 -		Before
2017																				188		2017		2008
Total																			$	3,577	$	716	$	44
																				Total net liability			$	760

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1			2			3			4			5			6			7			8			9			10
		44.7	%		18.9	%		7.9	%		7.0	%		6.9	%		5.4	%		3.7	%		2.2	%		0.8	%		0.7	%