Insurance Claim Reserves (Tables)

12 Months Ended

Dec. 31, 2021

Insurance Loss Reserves [Abstract]

Claims and claim adjustment expense reserves [Table Text Block]

Claims and claim adjustment expense reserves were as follows:

(at December 31, in millions)	2021		2020
Property-casualty	$	56,897	$	54,510
Accident and health	10		11
Total	$	56,907	$	54,521

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

The following table presents a reconciliation of beginning and ending property casualty reserve balances for claims and claim adjustment expenses:

(at and for the year ended December 31, in millions)	2021		2020		2019
Claims and claim adjustment expense reserves at beginning of year	$	54,510	$	51,836	$	50,653
Less reinsurance recoverables on unpaid losses	8,153		8,035		8,182
Cumulative effect of adoption of updated accounting guidance for credit losses at January 1, 2020	—		53		—
Net reserves at beginning of year	46,357		43,854		42,471
Estimated claims and claim adjustment expenses for claims arising in the current year	20,698		19,285		18,854
Estimated increase (decrease) in claims and claim adjustment expenses for claims arising in prior years	(484)		(267)		164
Total increases	20,214		19,018		19,018
Claims and claim adjustment expense payments for claims arising in:
Current year	8,401		7,497		7,734
Prior years	9,470		9,092		10,060
Total payments	17,871		16,589		17,794
Unrealized foreign exchange loss (gain)	(12)		74		106
Net reserves at end of year	48,688		46,357		43,801
Plus reinsurance recoverables on unpaid losses	8,209		8,153		8,035
Claims and claim adjustment expense reserves at end of year	$	56,897	$	54,510	$	51,836

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

The following is a summary of claims and claim adjustment expense reserves, including certain components, for the Company’s major product lines by reporting segment at December 31, 2021.

(at December 31, 2021, 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	$	8,893	$	(139)	$	8,754	$	978	$	9,732
Commercial property	997		—		997		513		1,510
Commercial multi-peril	4,427		—		4,427		225		4,652
Commercial automobile	3,740		—		3,740		303		4,043
Workers’ compensation (1)	16,623		(948)		15,675		665		16,340
Bond & Specialty Insurance
General liability	2,297		—		2,297		173		2,470
Fidelity and surety	527		—		527		6		533
Personal Insurance
Automobile	3,155		—		3,155		442		3,597
Homeowners (excluding Other)	1,661		—		1,661		210		1,871
International - Canada	745		—		745		21		766
Subtotal — claims and allocated claim adjustment expenses for the products presented in the development tables below	43,065		(1,087)		41,978		3,536		45,514
Other insurance contracts (2)	4,231		(4)		4,227		1,825		6,052
Unallocated loss adjustment expense reserves	2,383		—		2,383		15		2,398
Structured settlements (3)	—		—		—		2,856		2,856
Other	100		—		100		(23)		77
Total property-casualty	49,779		(1,091)		48,688		8,209		56,897
Accident and health	—		—		—		10		10
Total	$	49,779	$	(1,091)	$	48,688	$	8,219	$	56,907

___________________________________________

(1)Net discount amount includes discount of $55 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, 2021 were $8.45 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,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves Dec 31, 2021		Cumulative Number of Reported Claims
2012	$	989	$	985	$	935	$	913	$	892	$	905	$	917	$	920	$	941	$	927	$	59	25,061
2013			965		975		958		940		927		933		975		975		963		72		22,775
2014					976		989		983		948		956		1,013		988		979		100		22,576
2015							998		956		923		967		1,057		1,087		1,072		113		21,689
2016									1,075		1,058		1,087		1,187		1,204		1,179		189		20,556
2017											1,133		1,143		1,196		1,234		1,226		266		19,262
2018													1,253		1,312		1,344		1,395		407		19,135
2019															1,447		1,486		1,498		682		17,717
2020																	1,467		1,493		1,013		12,141
2021																			1,591		1,365		9,119
																	Total		$	12,323

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	32	$	150	$	295	$	489	$	589	$	699	$	754	$	811	$	831	$	837
2013			35		175		363		498		639		745		816		836		853
2014					37		163		321		515		640		750		805		832
2015							36		137		336		558		740		828		875		Liability for Claims
2016									35		191		421		649		758		858		And Allocated Claim
2017											40		180		378		552		724		Adjustment Expenses,
2018													42		202		441		709		Net of Reinsurance
2019															51		233		482
2020																	61		244		2012 -		Before
2021																			67		2021		2012
																	Total		$	6,481	$	5,842	$	3,051
																			Total net liability				$	8,893

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	3.5	%	12.2	%	17.4	%	18.3	%	13.1	%	10.2	%	5.8	%	3.6	%	2.0	%	0.6	%

Commercial Property

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year											IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2017	$	1,209	$	1,177	$	1,151	$	1,128	$	1,117	$	3	25,143
2018			1,093		1,079		1,070		1,068		20		25,077
2019					1,069		1,034		1,031		(12)		25,376
2020							1,107		1,025		38		25,434
2021									1,236		94		21,996
							Total		$	5,477

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
	Unaudited
											Liability for Claims
Accident Year											And Allocated Claim
2017	$	618	$	1,003	$	1,073	$	1,094	$	1,103	Adjustment Expenses,
2018			561		928		981		1,005		Net of Reinsurance
2019					610		957		1,001
2020							580		857		2017 -		Before
2021									645		2021		2017
							Total		$	4,611	$	866	$	131
									Total net liability				$	997

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	55.2	%	32.4	%	5.2	%	2.0	%	0.8	%

Commercial Multi-Peril

	(dollars in millions)
	For the Years Ended December 31,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2012	$	1,885	$	1,883	$	1,903	$	1,888	$	1,888	$	1,867	$	1,859	$	1,854	$	1,853	$	1,851	$	21	105,054
2013			1,615		1,623		1,620		1,609		1,591		1,600		1,599		1,598		1,593		26		83,991
2014					1,663		1,627		1,625		1,617		1,626		1,627		1,627		1,622		32		78,465
2015							1,568		1,625		1,593		1,597		1,606		1,593		1,584		46		71,922
2016									1,662		1,623		1,598		1,590		1,601		1,587		63		69,368
2017											1,872		1,928		1,956		1,919		1,935		104		72,318
2018													1,976		2,114		2,092		2,112		163		72,853
2019															2,017		2,087		2,089		294		66,484
2020																	2,142		2,141		575		67,796
2021																			2,164		892		47,190
																	Total		$	18,678

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	795	$	1,246	$	1,424	$	1,590	$	1,699	$	1,752	$	1,780	$	1,804	$	1,811	$	1,818
2013			644		987		1,167		1,304		1,410		1,475		1,516		1,532		1,544
2014					628		956		1,154		1,328		1,448		1,512		1,544		1,560
2015							595		970		1,144		1,310		1,409		1,452		1,489		Liability for Claims
2016									585		950		1,133		1,278		1,373		1,437		And Allocated Claim
2017											716		1,199		1,388		1,531		1,674		Adjustment Expenses,
2018													792		1,302		1,500		1,669		Net of Reinsurance
2019															707		1,187		1,423
2020																	791		1,180		2012 -		Before
2021																			744		2021		2012
																	Total		$	14,538	$	4,140	$	287
																			Total net liability				$	4,427

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	37.6	%	22.6	%	10.8	%	9.0	%	6.6	%	3.5	%	2.1	%	1.1	%	0.6	%	0.4	%

Commercial Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
	Unaudited
Accident Year											IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2017	$	1,386	$	1,501	$	1,524	$	1,522	$	1,533	$	53	192,155
2018			1,645		1,742		1,745		1,761		130		204,588
2019					1,835		1,951		1,976		321		206,533
2020							1,788		1,677		640		141,722
2021									1,741		941		132,893
							Total		$	8,688

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
	Unaudited
											Liability for Claims
Accident Year											And Allocated Claim
2017	$	456	$	746	$	1,027	$	1,226	$	1,361	Adjustment Expenses,
2018			515		848		1,159		1,404		Net of Reinsurance
2019					539		934		1,269
2020							437		696		2017 -		Before
2021									453		2021		2017
							Total		$	5,183	$	3,505	$	235
									Total net liability				$	3,740

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	27.6	%	18.3	%	17.6	%	13.4	%	8.8	%

Workers’ Compensation

	(dollars in millions)
	For the Years Ended December 31,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2012	$	2,447	$	2,456	$	2,457	$	2,456	$	2,445	$	2,453	$	2,416	$	2,387	$	2,377	$	2,375	$	347	138,454
2013			2,553		2,545		2,540		2,506		2,463		2,423		2,354		2,321		2,304		344		134,573
2014					2,554		2,553		2,547		2,476		2,430		2,393		2,352		2,336		393		131,465
2015							2,644		2,585		2,505		2,441		2,372		2,279		2,220		462		130,920
2016									2,768		2,690		2,569		2,473		2,372		2,300		456		130,036
2017											2,779		2,681		2,584		2,483		2,439		638		122,110
2018													2,744		2,687		2,599		2,503		737		122,931
2019															2,680		2,714		2,699		844		119,678
2020																	2,559		2,530		1,249		95,611
2021																			2,356		1,420		83,546
																	Total		$	24,062

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	443	$	940	$	1,217	$	1,394	$	1,536	$	1,629	$	1,689	$	1,735	$	1,768	$	1,793
2013			458		954		1,237		1,413		1,525		1,604		1,659		1,700		1,729
2014					455		944		1,224		1,399		1,505		1,581		1,634		1,672
2015							430		893		1,154		1,310		1,411		1,470		1,520		Liability for Claims
2016									421		873		1,118		1,272		1,367		1,433		And Allocated Claim
2017											433		890		1,154		1,314		1,418		Adjustment Expenses,
2018													440		919		1,169		1,330		Net of Reinsurance
2019															466		951		1,229
2020																	389		794		2012 -		Before
2021																			427		2021		2012
																	Total		$	13,345	$	10,717	$	5,906
																			Total net liability				$	16,623

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	18.2	%	19.5	%	11.2	%	7.0	%	4.7	%	3.2	%	2.4	%	1.8	%	1.3	%	1.1	%

Bond & Specialty Insurance

General Liability

	(dollars in millions)
	For the Years Ended December 31,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2012	$	538	$	591	$	614	$	605	$	601	$	599	$	605	$	593	$	581	$	605	$	14	4,872
2013			510		565		606		630		654		607		586		575		564		(4)		4,467
2014					549		571		563		518		473		452		450		449		15		4,375
2015							528		524		486		437		395		414		413		21		4,226
2016									512		511		504		520		514		510		34		4,398
2017											534		517		526		493		524		65		4,585
2018													530		548		585		595		99		4,795
2019															588		653		665		214		5,290
2020																	772		753		399		5,004
2021																			812		613		3,847
																	Total		$	5,890

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	38	$	160	$	255	$	342	$	383	$	419	$	436	$	453	$	459	$	493
2013			34		154		252		352		400		434		451		462		482
2014					38		150		239		312		367		407		418		426
2015							38		141		234		310		338		348		381		Liability for Claims
2016									30		141		233		313		378		446		And Allocated Claim
2017											38		155		262		340		404		Adjustment Expenses,
2018													49		182		290		383		Net of Reinsurance
2019															51		189		323
2020																	52		210		2012 -		Before
2021																			78		2021		2012
																	Total		$	3,626	$	2,264	$	33
																			Total net liability				$	2,297

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	7.5	%	22.1	%	19.0	%	16.1	%	9.9	%	7.3	%	4.1	%	2.2	%	2.2	%	5.6	%

Fidelity and Surety

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021		IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
Accident Year	Unaudited
2017	$	244	$	271	$	240	$	241	$	226	$	1	940
2018			220		235		220		220		2		907
2019					203		193		200		37		871
2020							274		203		93		754
2021									284		253		421
							Total		$	1,133

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited										Liability for Claims
											And Allocated Claim
2017	$	70	$	166	$	194	$	205	$	210	Adjustment Expenses,
2018			64		171		202		206		Net of Reinsurance
2019					49		121		147
2020							50		79		2017 -		Before
2021									25		2021		2017
							Total		$	667	$	466	$	61
									Total net liability				$	527

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	23.6	%	35.4	%	13.2	%	3.4	%	2.1	%

Personal Insurance

Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021		IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
Accident Year	Unaudited
2017	$	3,323	$	3,256	$	3,221	$	3,206	$	3,199	$	24	1,062,811
2018			3,281		3,269		3,233		3,220		60		1,051,415
2019					3,362		3,361		3,333		153		1,032,740
2020							2,829		2,764		353		808,338
2021									3,716		1,028		894,499
							Total		$	16,232

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited										Liability for Claims
											And Allocated Claim
2017	$	1,912	$	2,575	$	2,887	$	3,046	$	3,121	Adjustment Expenses,
2018			1,889		2,582		2,880		3,040		Net of Reinsurance
2019					1,933		2,650		2,958
2020							1,571		2,126		2017 -		Before
2021									2,062		2021		2017
							Total		$	13,307	$	2,925	$	230
									Total net liability				$	3,155

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	57.8	%	21.0	%	9.4	%	5.0	%	2.4	%

Homeowners (excluding Other)

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021		IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
Accident Year	Unaudited
2017	$	2,312	$	2,340	$	2,343	$	2,170	$	2,160	$	14	170,198
2018			2,610		2,574		2,381		2,325		21		187,306
2019					2,297		2,344		2,343		26		181,209
2020							3,019		2,967		170		219,786
2021									3,463		774		203,280
							Total		$	13,258

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited										Liability for Claims
											And Allocated Claim
2017	$	1,471	$	2,059	$	2,197	$	2,089	$	2,103	Adjustment Expenses,
2018			1,657		2,298		2,255		2,239		Net of Reinsurance
2019					1,613		2,179		2,269
2020							2,019		2,673		2017 -		Before
2021									2,334		2021		2017
							Total		$	11,618	$	1,640	$	21
									Total net liability				$	1,661

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	68.7	%	25.2	%	2.8	%	(2.8)	%	0.7	%

International - Canada

	(dollars in millions)
	For the Years Ended December 31,																				IBNR Reserves December 31, 2021		Cumulative
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021				Number of
Accident	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance																						Reported
Year	Unaudited																						Claims
2012	$	446	$	423	$	425	$	408	$	407	$	390	$	383	$	371	$	372	$	372	$	—	51,245
2013			497		490		481		469		456		454		444		439		436		(7)		54,268
2014					440		456		456		444		437		434		433		430		(10)		52,300
2015							370		369		369		366		367		366		361		(2)		45,220
2016									370		419		420		429		429		428		2		45,764
2017											355		391		414		414		413		5		46,825
2018													451		474		475		480		17		50,599
2019															456		451		473		53		48,179
2020																	356		342		88		30,098
2021																			357		136		26,606
																	Total		$	4,092

Accident	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Year	Unaudited
2012	$	170	$	237	$	268	$	295	$	324	$	342	$	351	$	356	$	362		$	365
2013			199		278		311		345		378		397		415		423			430
2014					194		272		309		339		371		394		411			426
2015							166		232		260		290		315		330			344		Liability for Claims
2016									217		291		317		352		377			395		And Allocated Claim
2017											187		263		304		328			356		Adjustment Expenses,
2018													224		312		349			389		Net of Reinsurance
2019															221		296			333
2020																	148			199		2012 -		Before
2021																				131		2021		2012
																	Total			$	3,368	$	724	$	21
																			Total net liability					$	745

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	45.1	%	17.5	%	8.0	%	7.5	%	7.1	%	4.6	%	3.6	%	2.3	%	1.6	%	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,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves Dec 31, 2021		Cumulative Number of Reported Claims
2012	$	989	$	985	$	935	$	913	$	892	$	905	$	917	$	920	$	941	$	927	$	59	25,061
2013			965		975		958		940		927		933		975		975		963		72		22,775
2014					976		989		983		948		956		1,013		988		979		100		22,576
2015							998		956		923		967		1,057		1,087		1,072		113		21,689
2016									1,075		1,058		1,087		1,187		1,204		1,179		189		20,556
2017											1,133		1,143		1,196		1,234		1,226		266		19,262
2018													1,253		1,312		1,344		1,395		407		19,135
2019															1,447		1,486		1,498		682		17,717
2020																	1,467		1,493		1,013		12,141
2021																			1,591		1,365		9,119
																	Total		$	12,323

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	32	$	150	$	295	$	489	$	589	$	699	$	754	$	811	$	831	$	837
2013			35		175		363		498		639		745		816		836		853
2014					37		163		321		515		640		750		805		832
2015							36		137		336		558		740		828		875		Liability for Claims
2016									35		191		421		649		758		858		And Allocated Claim
2017											40		180		378		552		724		Adjustment Expenses,
2018													42		202		441		709		Net of Reinsurance
2019															51		233		482
2020																	61		244		2012 -		Before
2021																			67		2021		2012
																	Total		$	6,481	$	5,842	$	3,051
																			Total net liability				$	8,893

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	3.5	%	12.2	%	17.4	%	18.3	%	13.1	%	10.2	%	5.8	%	3.6	%	2.0	%	0.6	%

Commercial Property

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year											IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2017	$	1,209	$	1,177	$	1,151	$	1,128	$	1,117	$	3	25,143
2018			1,093		1,079		1,070		1,068		20		25,077
2019					1,069		1,034		1,031		(12)		25,376
2020							1,107		1,025		38		25,434
2021									1,236		94		21,996
							Total		$	5,477

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
	Unaudited
											Liability for Claims
Accident Year											And Allocated Claim
2017	$	618	$	1,003	$	1,073	$	1,094	$	1,103	Adjustment Expenses,
2018			561		928		981		1,005		Net of Reinsurance
2019					610		957		1,001
2020							580		857		2017 -		Before
2021									645		2021		2017
							Total		$	4,611	$	866	$	131
									Total net liability				$	997

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	55.2	%	32.4	%	5.2	%	2.0	%	0.8	%

Commercial Multi-Peril

	(dollars in millions)
	For the Years Ended December 31,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2012	$	1,885	$	1,883	$	1,903	$	1,888	$	1,888	$	1,867	$	1,859	$	1,854	$	1,853	$	1,851	$	21	105,054
2013			1,615		1,623		1,620		1,609		1,591		1,600		1,599		1,598		1,593		26		83,991
2014					1,663		1,627		1,625		1,617		1,626		1,627		1,627		1,622		32		78,465
2015							1,568		1,625		1,593		1,597		1,606		1,593		1,584		46		71,922
2016									1,662		1,623		1,598		1,590		1,601		1,587		63		69,368
2017											1,872		1,928		1,956		1,919		1,935		104		72,318
2018													1,976		2,114		2,092		2,112		163		72,853
2019															2,017		2,087		2,089		294		66,484
2020																	2,142		2,141		575		67,796
2021																			2,164		892		47,190
																	Total		$	18,678

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	795	$	1,246	$	1,424	$	1,590	$	1,699	$	1,752	$	1,780	$	1,804	$	1,811	$	1,818
2013			644		987		1,167		1,304		1,410		1,475		1,516		1,532		1,544
2014					628		956		1,154		1,328		1,448		1,512		1,544		1,560
2015							595		970		1,144		1,310		1,409		1,452		1,489		Liability for Claims
2016									585		950		1,133		1,278		1,373		1,437		And Allocated Claim
2017											716		1,199		1,388		1,531		1,674		Adjustment Expenses,
2018													792		1,302		1,500		1,669		Net of Reinsurance
2019															707		1,187		1,423
2020																	791		1,180		2012 -		Before
2021																			744		2021		2012
																	Total		$	14,538	$	4,140	$	287
																			Total net liability				$	4,427

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	37.6	%	22.6	%	10.8	%	9.0	%	6.6	%	3.5	%	2.1	%	1.1	%	0.6	%	0.4	%

Commercial Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
	Unaudited
Accident Year											IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2017	$	1,386	$	1,501	$	1,524	$	1,522	$	1,533	$	53	192,155
2018			1,645		1,742		1,745		1,761		130		204,588
2019					1,835		1,951		1,976		321		206,533
2020							1,788		1,677		640		141,722
2021									1,741		941		132,893
							Total		$	8,688

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
	Unaudited
											Liability for Claims
Accident Year											And Allocated Claim
2017	$	456	$	746	$	1,027	$	1,226	$	1,361	Adjustment Expenses,
2018			515		848		1,159		1,404		Net of Reinsurance
2019					539		934		1,269
2020							437		696		2017 -		Before
2021									453		2021		2017
							Total		$	5,183	$	3,505	$	235
									Total net liability				$	3,740

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	27.6	%	18.3	%	17.6	%	13.4	%	8.8	%

Workers’ Compensation

	(dollars in millions)
	For the Years Ended December 31,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2012	$	2,447	$	2,456	$	2,457	$	2,456	$	2,445	$	2,453	$	2,416	$	2,387	$	2,377	$	2,375	$	347	138,454
2013			2,553		2,545		2,540		2,506		2,463		2,423		2,354		2,321		2,304		344		134,573
2014					2,554		2,553		2,547		2,476		2,430		2,393		2,352		2,336		393		131,465
2015							2,644		2,585		2,505		2,441		2,372		2,279		2,220		462		130,920
2016									2,768		2,690		2,569		2,473		2,372		2,300		456		130,036
2017											2,779		2,681		2,584		2,483		2,439		638		122,110
2018													2,744		2,687		2,599		2,503		737		122,931
2019															2,680		2,714		2,699		844		119,678
2020																	2,559		2,530		1,249		95,611
2021																			2,356		1,420		83,546
																	Total		$	24,062

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	443	$	940	$	1,217	$	1,394	$	1,536	$	1,629	$	1,689	$	1,735	$	1,768	$	1,793
2013			458		954		1,237		1,413		1,525		1,604		1,659		1,700		1,729
2014					455		944		1,224		1,399		1,505		1,581		1,634		1,672
2015							430		893		1,154		1,310		1,411		1,470		1,520		Liability for Claims
2016									421		873		1,118		1,272		1,367		1,433		And Allocated Claim
2017											433		890		1,154		1,314		1,418		Adjustment Expenses,
2018													440		919		1,169		1,330		Net of Reinsurance
2019															466		951		1,229
2020																	389		794		2012 -		Before
2021																			427		2021		2012
																	Total		$	13,345	$	10,717	$	5,906
																			Total net liability				$	16,623

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	18.2	%	19.5	%	11.2	%	7.0	%	4.7	%	3.2	%	2.4	%	1.8	%	1.3	%	1.1	%

Bond & Specialty Insurance

General Liability

	(dollars in millions)
	For the Years Ended December 31,
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021
	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
	Unaudited
Accident Year																					IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
2012	$	538	$	591	$	614	$	605	$	601	$	599	$	605	$	593	$	581	$	605	$	14	4,872
2013			510		565		606		630		654		607		586		575		564		(4)		4,467
2014					549		571		563		518		473		452		450		449		15		4,375
2015							528		524		486		437		395		414		413		21		4,226
2016									512		511		504		520		514		510		34		4,398
2017											534		517		526		493		524		65		4,585
2018													530		548		585		595		99		4,795
2019															588		653		665		214		5,290
2020																	772		753		399		5,004
2021																			812		613		3,847
																	Total		$	5,890

	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited
2012	$	38	$	160	$	255	$	342	$	383	$	419	$	436	$	453	$	459	$	493
2013			34		154		252		352		400		434		451		462		482
2014					38		150		239		312		367		407		418		426
2015							38		141		234		310		338		348		381		Liability for Claims
2016									30		141		233		313		378		446		And Allocated Claim
2017											38		155		262		340		404		Adjustment Expenses,
2018													49		182		290		383		Net of Reinsurance
2019															51		189		323
2020																	52		210		2012 -		Before
2021																			78		2021		2012
																	Total		$	3,626	$	2,264	$	33
																			Total net liability				$	2,297

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	7.5	%	22.1	%	19.0	%	16.1	%	9.9	%	7.3	%	4.1	%	2.2	%	2.2	%	5.6	%

Fidelity and Surety

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021		IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
Accident Year	Unaudited
2017	$	244	$	271	$	240	$	241	$	226	$	1	940
2018			220		235		220		220		2		907
2019					203		193		200		37		871
2020							274		203		93		754
2021									284		253		421
							Total		$	1,133

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited										Liability for Claims
											And Allocated Claim
2017	$	70	$	166	$	194	$	205	$	210	Adjustment Expenses,
2018			64		171		202		206		Net of Reinsurance
2019					49		121		147
2020							50		79		2017 -		Before
2021									25		2021		2017
							Total		$	667	$	466	$	61
									Total net liability				$	527

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	23.6	%	35.4	%	13.2	%	3.4	%	2.1	%

Personal Insurance

Automobile

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021		IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
Accident Year	Unaudited
2017	$	3,323	$	3,256	$	3,221	$	3,206	$	3,199	$	24	1,062,811
2018			3,281		3,269		3,233		3,220		60		1,051,415
2019					3,362		3,361		3,333		153		1,032,740
2020							2,829		2,764		353		808,338
2021									3,716		1,028		894,499
							Total		$	16,232

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited										Liability for Claims
											And Allocated Claim
2017	$	1,912	$	2,575	$	2,887	$	3,046	$	3,121	Adjustment Expenses,
2018			1,889		2,582		2,880		3,040		Net of Reinsurance
2019					1,933		2,650		2,958
2020							1,571		2,126		2017 -		Before
2021									2,062		2021		2017
							Total		$	13,307	$	2,925	$	230
									Total net liability				$	3,155

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	57.8	%	21.0	%	9.4	%	5.0	%	2.4	%

Homeowners (excluding Other)

	(dollars in millions)
	For the Years Ended December 31,
	2017		2018		2019		2020		2021		IBNR Reserves December 31, 2021		Cumulative Number of Reported Claims
	Incurred Claims and Allocated Claims Adjustment
	Expenses, Net of Reinsurance
Accident Year	Unaudited
2017	$	2,312	$	2,340	$	2,343	$	2,170	$	2,160	$	14	170,198
2018			2,610		2,574		2,381		2,325		21		187,306
2019					2,297		2,344		2,343		26		181,209
2020							3,019		2,967		170		219,786
2021									3,463		774		203,280
							Total		$	13,258

	Cumulative Paid Claims and Allocated Claim
	Adjustment Expenses, Net of Reinsurance
Accident Year	Unaudited										Liability for Claims
											And Allocated Claim
2017	$	1,471	$	2,059	$	2,197	$	2,089	$	2,103	Adjustment Expenses,
2018			1,657		2,298		2,255		2,239		Net of Reinsurance
2019					1,613		2,179		2,269
2020							2,019		2,673		2017 -		Before
2021									2,334		2021		2017
							Total		$	11,618	$	1,640	$	21
									Total net liability				$	1,661

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5
	68.7	%	25.2	%	2.8	%	(2.8)	%	0.7	%

International - Canada

	(dollars in millions)
	For the Years Ended December 31,																				IBNR Reserves December 31, 2021		Cumulative
	2012		2013		2014		2015		2016		2017		2018		2019		2020		2021				Number of
Accident	Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance																						Reported
Year	Unaudited																						Claims
2012	$	446	$	423	$	425	$	408	$	407	$	390	$	383	$	371	$	372	$	372	$	—	51,245
2013			497		490		481		469		456		454		444		439		436		(7)		54,268
2014					440		456		456		444		437		434		433		430		(10)		52,300
2015							370		369		369		366		367		366		361		(2)		45,220
2016									370		419		420		429		429		428		2		45,764
2017											355		391		414		414		413		5		46,825
2018													451		474		475		480		17		50,599
2019															456		451		473		53		48,179
2020																	356		342		88		30,098
2021																			357		136		26,606
																	Total		$	4,092

Accident	Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
Year	Unaudited
2012	$	170	$	237	$	268	$	295	$	324	$	342	$	351	$	356	$	362		$	365
2013			199		278		311		345		378		397		415		423			430
2014					194		272		309		339		371		394		411			426
2015							166		232		260		290		315		330			344		Liability for Claims
2016									217		291		317		352		377			395		And Allocated Claim
2017											187		263		304		328			356		Adjustment Expenses,
2018													224		312		349			389		Net of Reinsurance
2019															221		296			333
2020																	148			199		2012 -		Before
2021																				131		2021		2012
																	Total			$	3,368	$	724	$	21
																			Total net liability					$	745

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance
	Unaudited
Years	1		2		3		4		5		6		7		8		9		10
	45.1	%	17.5	%	8.0	%	7.5	%	7.1	%	4.6	%	3.6	%	2.3	%	1.6	%	0.7	%