Liability for Loss and LAE (Tables)

12 Months Ended

Dec. 31, 2017

Activity in Liability for Loss and Loss Adjustment Expense

The following table presents the activity in the liability for loss and LAE in 2017, 2016 and 2015:

	Year Ended December 31,
	2017			2016		2015
				($ in millions)
Reserves as of January 1	$	11,087.2		$	10,799.2	$	11,597.2
Less: reinsurance recoverables(1)		1,236.2			1,169.3		1,289.4
Net reserves as of January 1		9,851.0			9,629.9		10,307.8
Other adjustments		(293.7)	(2)		2.4		(1.9)
Incurred loss and LAE, net of reinsurance, related to:
Current year		3,918.8			3,285.2		2,555.3
Prior years		(298.6)			(368.0)		(215.5)
Total incurred loss and LAE, net of reinsurance		3,620.2			2,917.2		2,339.8
Paid loss and LAE, net of reinsurance, related to:(3)
Current year		853.2			734.3		417.6
Prior years		2,225.2			1,866.5		2,390.4
Total paid loss and LAE, net of reinsurance		3,078.4			2,600.8		2,808.0
Foreign exchange effect		122.1			(97.7)		(207.8)
Net reserves as of December 31		10,221.2			9,851.0		9,629.9
Reinsurance recoverables as of December 31(1)		1,650.1			1,236.2		1,169.3
Reserves as of December 31	$	11,871.3		$	11,087.2	$	10,799.2

(1) Reinsurance recoverables in this table include only ceded loss and LAE reserves.

(2) Primarily represents the impact on net reserves arising from the sale of PacificComp on December 31, 2017.

(3) Includes paid losses, net of reinsurance, related to commutations.

(Favorable) Unfavorable Prior Accident Year Loss Reserve Development

The following table presents (favorable) unfavorable prior accident year loss reserve development for 2017, 2016 and 2015:

	Year Ended December 31,
	2017			2016			2015
				($ in millions)
Reinsurance Segment
Property:
Catastrophe events	$	(22.2)	(1)	$	(14.2	)(2)	$	(28.0)	(3)
Non-catastrophe		(72.3)	(4)		(91.5	)(5)		(48.7)	(6)
Total property		(94.5)			(105.7	)		(76.7)
Casualty & other:
Malpractice Treaties(7)		(5.0)			(10.8	)		(12.1)
Ogden rate impact(8)		24.4			-			-
Commuted A&E Liabilities(9)		-			-			38.2
Other		(174.4)	(10)		(177.0	)(11)		(157.7)	(12)
Total casualty & other		(155.0)			(187.8	)		(131.6)
Total Reinsurance Segment		(249.5)			(293.5	)		(208.3)
Insurance Segment
RSUI:
Casualty		(38.9)	(13)		(35.3	)(14)		(2.9)	(15)
Property and other		(4.3)	(16)		(33.0	)(17)		(9.0)	(18)
Total RSUI		(43.2)			(68.3	)		(11.9)
CapSpecialty:
Ongoing lines of business		(3.4)	(19)		(0.3	)		11.0	(20)
Terminated Program(21)		-			(1.9	)		(6.3)
Asbestos-related illness and environmental impairment liability		-			(2.0	)		-
Total CapSpecialty		(3.4)			(4.2	)		4.7
PacificComp		(2.5)	(22)		(2.0	)(23)		-
Total incurred related to prior years	$	(298.6)		$	(368.0	)	$	(215.5)

(1) Reflects favorable prior accident year loss reserve development from several catastrophes that occurred primarily in the 2016 accident year.

(2) Reflects favorable prior accident year loss reserve development from several catastrophes that occurred in the 2010 through 2015 accident years.

(3) Includes favorable prior accident year loss reserve development of ($27.7) million from Super Storm Sandy in 2012 and various smaller amounts on catastrophes that occurred in the 2010, 2011, 2013 and 2014 accident years, partially offset by unfavorable prior accident year development from the New Zealand earthquake in 2010.

(4) Reflects favorable prior accident year loss reserve development primarily related to the 2011 through 2016 accident years.

(5) Reflects favorable prior accident year loss reserve development primarily related to the 2011 through 2015 accident years.

(6) Reflects favorable prior accident year loss reserve development primarily related to the 2013 and 2014 accident years.

(7) Represents certain medical malpractice treaties pursuant to which the increased underwriting profits created by the favorable prior accident year loss reserve development are largely retained by the cedants. As a result, the favorable prior accident year loss reserve development is largely offset by an increase in profit commission expense incurred when such favorable prior accident year loss reserve development occurs.

(8) Represents unfavorable prior accident year loss reserve development arising from the U.K. Ministry of Justice’s decision to significantly reduce the discount rate, referred to as the Ogden rate, used to calculate lump-sum bodily injury payouts in personal injury insurance claims in the U.K. As of March 20, 2017, the Ogden rate changed from 2.50 percent to negative 0.75 percent.

(9) Represents unfavorable prior accident year loss reserve development related to a commutation and release agreement entered into on November 30, 2015 by TransRe with AIG Property Casualty, Inc., National Indemnity Company and Resolute Management, Inc. with respect to certain reinsurance contracts, including contracts covering asbestos-related illness and environmental impairment liabilities for 1986 and prior years.

(10) Primarily reflects favorable prior accident year loss reserve development in: (i) longer-tailed professional liability and general liability lines of business related to the 2003 through 2012 accident years; and (ii) shorter-tailed casualty lines of business related to the 2010 through 2014 accident years; partially offset by unfavorable prior accident year loss reserve development in shorter-tailed casualty lines of business in the 2015 and 2016 accident years.

(11) Generally reflects favorable prior accident year loss reserve development reserves in a variety of casualty & other lines of business primarily from the 2003 through 2015 accident years.

(12) Generally reflects favorable prior accident year loss reserve development in a variety of casualty & other lines of business primarily from the 2005 through 2014 accident years, including ($30.7) million of favorable prior accident year development related to French medical malpractice loss reserves commuted in the fourth quarter of 2015 with a European cedant, partially offset by unfavorable prior accident year development from the 2004 and prior accident years.

(13) Primarily reflects favorable prior accident year loss reserve development in the umbrella/excess lines of business related to the 2005 through 2011 accident years.

(14) Primarily reflects favorable prior accident year loss reserve development in the umbrella/excess, general liability and professional liability lines of business related to the 2006 through 2012 accident years.

(15) Primarily reflects favorable prior accident year loss reserve development in the umbrella/excess, general liability and professional liability lines of business related to the 2006 through 2011 accident years, partially offset by unfavorable prior accident year loss reserve development in the directors’ and officers’ liability lines of business related to the 2011 through 2014 accident years.

(16) Primarily reflects favorable catastrophe prior accident year loss reserve development related to the 2016 accident year, partially offset by unfavorable prior accident year property loss reserve development in the binding authority lines of business primarily related to the 2015 and 2016 accident years.

(17) Includes favorable prior accident year loss reserve development of ($20.6) million from Super Storm Sandy in 2012 and various other smaller amounts primarily from non-catastrophe property lines of business in recent accident years.

(18) Primarily reflects favorable prior accident year development of ($4.1) million from Super Storm Sandy in 2012, net of reinsurance, and favorable prior accident year loss reserve development related to unallocated LAE reserves.

(19) Primarily reflects favorable prior accident year loss reserve development in the casualty lines of business related to the 2010, 2014, 2015 and 2016 accident years.

(20) Primarily reflects unfavorable prior accident year loss reserve development related to the casualty lines of business from the 2011 through 2013 accident years.

(21) Represents certain specialty lines of business written through a program administrator in connection with a terminated program related to the 2010 and 2009 accident years and reflects (favorable) loss emergence compared with loss emergence patterns assumed in earlier periods for such business.

(22) Primarily reflects favorable prior accident year loss reserve development related to the 2013 and prior accident years.

(23) Primarily reflects favorable prior accident year loss reserve development related to the 2012 and prior accident years.

Loss and LAE Reserve Summary and Reconciliation to Consolidated Balance Sheet

Loss and LAE Reserve Summary and Reconciliation to Consolidated Balance Sheet

	Unpaid loss and LAE as of December 31, 2017(1)
	Gross Loss and LAE Reserves		Reinsurance Recoverables on Unpaid Losses		Net Loss and     LAE Reserves
			($ in millions)
Reinsurance Segment
Property	$	1,758.0	$	(493.7)	$	1,264.3
Casualty & other - Longer-Tailed Lines of Business		4,923.7		(49.5)		4,874.2
Casualty & other - Shorter-Tailed Lines of Business		2,446.3		(201.5)		2,244.8
		9,128.0		(744.7)		8,383.3
Insurance Segment
RSUI - Property		581.5		(225.9)		355.6
RSUI - Casualty		1,933.3		(721.5)		1,211.8
RSUI		2,514.8		(947.4)		1,567.4
CapSpecialty		296.3		(25.8)		270.5
		2,811.1		(973.2)		1,837.9
Eliminations		(67.8)		67.8		-
Total	$	11,871.3	$	(1,650.1)	$	10,221.2

(1) Includes unallocated LAE, which aggregate to 1.3 percent of gross loss and LAE reserves as of December 31, 2017. Net loss and LAE Reserves by component are shown in the preceding tables, and consolidated gross loss and LAE reserves is presented in the Consolidated Balance Sheets.

Average Historical Loss and LAE Duration

The following table presents supplemental information about average historical loss and LAE duration, net of reinsurance, as of December 31, 2017.

	Average Annual Percentage Payout of Loss and LAE Incurred, Net of Reinsurance As of December 31, 2017
Years	1		2		3		4		5		6		7		8		9		10
Reinsurance Segment:
Property		28.8%		36.8%		17.5%		7.6%		3.7%		2.1%		1.4%		0.4%		0.3%		-0.5%
Casualty & other -
Longer-Tailed Lines
of Business		3.9%		7.8%		11.8%		14.3%		12.4%		11.4%		8.8%		5.9%		4.1%		3.1%
Casualty & other -
Shorter-Tailed Lines
of Business		35.5%		27.2%		13.1%		5.6%		3.3%		2.1%		1.8%		1.2%		0.9%		0.5%
Insurance Segment:
RSUI - Property		43.0%		31.0%		9.3%		5.8%		3.3%		1.7%		0.9%		0.2%		0.3%		0.4%
RSUI - Casualty		3.6%		14.7%		20.3%		14.7%		12.4%		6.4%		3.9%		5.8%		3.9%		1.4%
CapSpecialty		24.9%		24.2%		15.9%		13.5%		9.8%		4.9%		2.8%		1.6%		1.1%		0.7%

Reinsurance Segment | Property

Supplemental Information About Incurred and Paid Loss and LAE Development and Reconciliation to Consolidated Balance Sheet

Reinsurance Segment - Property

	Incurred Loss and LAE, Net of Reinsurance																				As of  December 31,  2017
	Year Ended December 31,
Accident  Year	2008  (unaudited)		2009  (unaudited)		2010  (unaudited)		2011  (unaudited)		2012  (unaudited)		2013  (unaudited)		2014  (unaudited)		2015  (unaudited)		2016  (unaudited)		2017		IBNR
	($ in millions)
2008	$	645.0	$	508.0	$	510.9	$	515.9	$	511.9	$	510.9	$	509.4	$	508.7	$	508.8	$	506.3	$	-
2009				489.3		377.4		359.7		358.0		357.1		357.6		355.9		353.7		353.6		0.3
2010						615.6		527.1		528.0		540.4		581.2		606.0		609.9		613.0		22.8
2011								1,351.2		1,342.3		1,269.4		1,240.7		1,235.2		1,217.1		1,210.9		3.2
2012										697.2		579.1		530.3		495.6		478.1		469.4		13.2
2013												501.2		470.6		444.6		422.1		406.8		11.8
2014														496.4		464.8		451.3		435.2		20.2
2015																368.8		332.0		320.6		31.9
2016																		684.1		647.2		92.4
2017																				1,174.6		413.9
Total Incurred Loss and LAE for the 2008 through 2017 accident years																			$	6,137.6
	Paid Loss and LAE, Net of Reinsurance
	Year Ended December 31,
Accident Year	2008 (unaudited)		2009 (unaudited)		2010 (unaudited)		2011 (unaudited)		2012 (unaudited)		2013 (unaudited)		2014 (unaudited)		2015 (unaudited)		2016 (unaudited)		2017
	($ in millions)
2008	$	163.3	$	350.8	$	435.2	$	477.1	$	495.0	$	501.5	$	503.1	$	505.0	$	505.6	$	503.3
2009				114.7		251.7		310.9		332.4		340.6		345.5		347.9		345.7		347.1
2010						169.3		349.0		418.9		472.3		513.5		540.1		563.7		571.5
2011								407.8		796.4		1,014.3		1,129.2		1,171.0		1,187.2		1,195.0
2012										90.3		268.9		377.8		416.7		438.0		448.0
2013												113.1		277.4		361.0		389.8		396.7
2014														109.4		297.6		360.0		382.9
2015																96.0		217.7		278.3
2016																		210.5		429.8
2017																				324.5
Cumulative Paid Loss and LAE for the 2008 through 2017 accident years																			$	4,877.1
Total incurred loss and LAE for the 2008 through 2017 accident years																			$	6,137.6
Cumulative paid loss and LAE for the 2008 through 2017 accident years																				4,877.1
Unpaid loss and LAE, net of reinsurance recoverables, for accident years prior to 2008																				3.8
Unpaid loss and LAE, net of reinsurance recoverables, as of December 31, 2017																			$	1,264.3

Insurance Segment | CapSpecialty Incorporated

Supplemental Information About Incurred and Paid Loss and LAE Development and Reconciliation to Consolidated Balance Sheet

Insurance Segment - CapSpecialty⁽¹⁾

	Incurred Loss and LAE, Net of Reinsurance
	Year Ended December 31,																				As of December 31, 2017
Accident     Year	2008  (unaudited)		2009  (unaudited)		2010  (unaudited)		2011  (unaudited)		2012  (unaudited)		2013  (unaudited)		2014  (unaudited)		2015  (unaudited)		2016  (unaudited)		2017		IBNR		Cumulative Number of Reported     Claims(2)
	($ in millions, except reported claims)
2008	$	102.6	$	97.1	$	93.2	$	90.1	$	89.6	$	94.3	$	94.2	$	96.5	$	96.8	$	94.6	$	0.4		8,765
2009				92.2		93.3		90.4		95.7		98.8		99.0		97.9		98.0		97.9		0.5		8,330
2010						93.2		110.8		117.9		134.8		134.5		129.8		129.5		127.7		2.4		8,170
2011								74.0		71.2		74.4		76.9		79.4		78.4		78.2		1.8		5,655
2012										72.7		71.8		66.2		69.3		69.7		68.7		0.9		5,233
2013												78.7		81.4		85.2		84.4		87.2		3.0		5,103
2014														102.8		102.7		101.0		100.2		8.5		5,810
2015																111.0		111.8		109.2		19.3		5,344
2016																		129.4		132.4		45.5		5,743
2017																				147.3		89.9		4,924
Total Incurred Loss and LAE for the 2008 through 2017 accident years																			$	1,043.4
	Paid Loss and LAE, Net of Reinsurance
	Year Ended December 31,
Accident     Year	2008 (unaudited)		2009 (unaudited)		2010 (unaudited)		2011 (unaudited)		2012 (unaudited)		2013 (unaudited)		2014 (unaudited)		2015 (unaudited)		2016 (unaudited)		2017
	($ in millions)
2008	$	26.3	$	43.8	$	63.9	$	74.6	$	82.4	$	87.2	$	90.3	$	91.7	$	93.1	$	93.7
2009				27.7		50.1		62.5		78.2		87.2		92.7		94.4		95.7		96.4
2010						22.0		56.2		78.4		98.1		111.0		119.2		121.6		123.9
2011								16.3		31.9		44.7		57.7		67.3		69.8		73.8
2012										18.6		38.6		46.9		57.2		63.3		65.0
2013												23.4		48.0		62.0		69.6		78.6
2014														34.0		56.3		71.9		83.1
2015																30.9		57.4		73.5
2016																		30.3		64.0
2017																				30.1
Cumulative Paid Loss and LAE for the 2008 through 2017 accident years																			$	782.1
Total incurred loss and LAE for the 2008 through 2017 accident years																			$	1,043.4
Cumulative paid loss and LAE for the 2008 through 2017 accident years																				782.1
Unpaid loss and LAE, net of reinsurance recoverables, for accident years prior to 2008																				9.2
Unpaid loss and LAE, net of reinsurance recoverables, as of December 31, 2017																			$	270.5

(1) The vast majority of the CapSpecialty’s loss and LAE reserves relate to its casualty lines of business.

(2) Represents claims reported by insured claimants.

Longer Tailed Lines of Business | Reinsurance Segment | Casualty & Other

Supplemental Information About Incurred and Paid Loss and LAE Development and Reconciliation to Consolidated Balance Sheet

Reinsurance Segment - Casualty & Other – Longer-Tailed Lines of Business⁽¹⁾

	Incurred Loss and LAE, Net of Reinsurance																				As of  December 31,  2017
	Year Ended December 31,
Accident  Year	2008  (unaudited)		2009  (unaudited)		2010  (unaudited)		2011  (unaudited)		2012  (unaudited)		2013  (unaudited)		2014  (unaudited)		2015  (unaudited)		2016  (unaudited)		2017		IBNR
	($ in millions)
2008	$	1,105.1	$	1,126.5	$	1,150.6	$	1,180.4	$	1,199.2	$	1,205.4	$	1,209.8	$	1,187.2	$	1,178.7	$	1,173.1	$	119.3
2009				1,059.8		1,074.7		1,091.0		1,101.9		1,094.9		1,107.8		1,129.4		1,123.4		1,119.8		119.0
2010						1,098.6		1,101.9		1,090.7		1,063.5		1,015.5		999.3		977.6		962.9		175.6
2011								996.0		1,009.6		994.6		974.6		959.1		949.9		942.6		189.3
2012										877.5		877.5		875.9		860.8		833.1		829.8		208.1
2013												798.6		802.2		799.2		777.5		776.7		288.3
2014														801.8		791.1		794.3		793.9		365.9
2015																794.8		799.0		797.0		455.8
2016																		776.7		776.8		547.0
2017																				764.4		681.6
Total Incurred Loss and LAE for the 2008 through 2017 accident years																			$	8,937.0
	Paid Loss and LAE, Net of Reinsurance
	Year Ended December 31,
Accident Year	2008 (unaudited)		2009 (unaudited)		2010 (unaudited)		2011 (unaudited)		2012 (unaudited)		2013 (unaudited)		2014 (unaudited)		2015 (unaudited)		2016 (unaudited)		2017
	($ in millions)
2008	$	55.2	$	99.5	$	214.5	$	374.8	$	521.1	$	655.4	$	766.5	$	852.0	$	901.2	$	937.8
2009				24.8		105.0		221.2		366.7		493.3		621.8		749.2		814.4		859.8
2010						33.8		108.4		208.5		322.3		438.7		573.9		644.3		688.9
2011								29.6		89.4		206.4		373.4		501.8		595.1		663.0
2012										46.9		106.8		201.1		316.6		435.7		521.3
2013												22.2		85.1		176.6		296.4		378.0
2014														29.8		107.5		229.6		342.9
2015																32.2		100.4		205.0
2016																		34.8		121.8
2017																				34.0
Cumulative Paid Loss and LAE for the 2008 through 2017 accident years																			$	4,752.5
Total incurred loss and LAE for the 2008 through 2017 accident years																			$	8,937.0
Cumulative paid loss and LAE for the 2008 through 2017 accident years																				4,752.5
Unpaid loss and LAE, net of reinsurance recoverables, for accident years prior to 2008																				689.7
Unpaid loss and LAE, net of reinsurance recoverables, as of December 31, 2017																			$	4,874.2

(1) Represents the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; and medical malpractice.

Shorter Tailed Lines Of Business | Reinsurance Segment | Casualty & Other

Supplemental Information About Incurred and Paid Loss and LAE Development and Reconciliation to Consolidated Balance Sheet

Reinsurance Segment - Casualty & Other – Shorter-Tailed Lines of Business⁽¹⁾

	Incurred Loss and LAE, Net of Reinsurance																				As of  December 31,  2017
	Year Ended December 31,
Accident  Year	2008  (unaudited)		2009  (unaudited)		2010  (unaudited)		2011  (unaudited)		2012  (unaudited)		2013  (unaudited)		2014  (unaudited)		2015  (unaudited)		2016  (unaudited)		2017		IBNR
	($ in millions)
2008	$	1,157.6	$	1,174.6	$	1,161.2	$	1,114.0	$	1,114.1	$	1,117.9	$	1,115.0	$	1,117.2	$	1,114.9	$	1,112.7	$	9.8
2009				1,169.1		1,114.0		1,086.5		1,066.8		1,071.0		1,063.8		1,064.1		1,062.7		1,062.9		13.2
2010						1,024.5		1,007.0		985.9		978.3		967.2		954.0		950.3		943.4		17.9
2011								1,031.2		1,023.6		1,007.6		992.8		973.0		963.7		959.8		28.9
2012										1,022.3		1,059.9		1,056.8		1,005.5		983.9		958.9		45.7
2013												850.8		868.8		838.4		823.4		804.1		53.6
2014														850.4		833.0		808.8		784.3		89.8
2015																763.4		768.6		784.0		110.1
2016																		1,118.0		1,124.4		247.0
2017																				1,095.9		626.4
Total Incurred Loss and LAE for the 2008 through 2017 accident years																			$	9,630.4
	Paid Loss and LAE, Net of Reinsurance
	Year Ended December 31,
Accident Year	2008 (unaudited)		2009 (unaudited)		2010 (unaudited)		2011 (unaudited)		2012 (unaudited)		2013 (unaudited)		2014 (unaudited)		2015 (unaudited)		2016 (unaudited)		2017
	($ in millions)
2008	$	397.5	$	753.8	$	922.6	$	962.4	$	994.2	$	1,020.8	$	1,042.7	$	1,060.0	$	1,071.3	$	1,077.4
2009				457.2		745.2		868.6		918.7		951.9		975.5		1,000.0		1,014.3		1,021.9
2010						404.9		671.3		776.5		832.7		866.7		884.8		897.5		903.7
2011								376.5		606.4		752.7		820.9		858.8		880.2		894.5
2012										354.8		614.5		740.0		792.7		828.3		846.5
2013												265.4		523.5		613.3		663.0		685.5
2014														251.2		421.1		523.3		572.9
2015																218.5		409.1		518.7
2016																		367.2		685.6
2017																				342.8
Cumulative Paid Loss and LAE for the 2008 through 2017 accident years																			$	7,549.5
Total incurred loss and LAE for the 2008 through 2017 accident years																			$	9,630.4
Cumulative paid loss and LAE for the 2008 through 2017 accident years																				7,549.5
Unpaid loss and LAE, net of reinsurance recoverables, for accident years prior to 2008																				163.9
Unpaid loss and LAE, net of reinsurance recoverables, as of December 31, 2017																			$	2,244.8

(1) Primarily represents the following reinsurance lines of business: ocean marine and aviation; auto liability; accident and health; surety; and credit.

Property Insurance | Insurance Segment | RSUI

Supplemental Information About Incurred and Paid Loss and LAE Development and Reconciliation to Consolidated Balance Sheet

Insurance Segment - RSUI - Property

	Incurred Loss and LAE, Net of Reinsurance																				As of December 31, 2017
	Year Ended December 31,
Accident  Year	2008  (unaudited)		2009  (unaudited)		2010  (unaudited)		2011  (unaudited)		2012  (unaudited)		2013  (unaudited)		2014  (unaudited)		2015  (unaudited)		2016  (unaudited)		2017		IBNR		Cumulative  Number of Reported Claims(1)
	($ in millions, except reported claims)
2008	$	176.  0	$	181.3	$	178.2	$	183.8	$	193.3	$	192.8	$	192.2	$	192.4	$	192.5	$	193.2	$	0.8		1,840
2009				78.3		63.1		60.1		62.5		63.1		63.7		64.5		64.7		65.0		1.0		1,315
2010						110.2		101.7		101.8		105.7		104.2		109.8		109.9		109.6		1.0		1,630
2011								168.8		162.0		160.5		159.9		159.0		159.3		159.3		1.2		2,203
2012										270.9		262.5		258.6		256.1		235.1		236.1		9.3		2,310
2013												157.3		157.2		150.4		152.1		152.4		2.7		2,393
2014														170.7		166.2		155.9		153.7		3.9		3,087
2015																140.5		136.1		142.6		8.6		2,993
2016																		181.4		170.5		15.7		3,314
2017																				330.7		119.7		3,305
Total Incurred Loss and LAE for the 2008 through 2017 accident years																			$	1,713.1
	Paid Loss and LAE, Net of Reinsurance
	Year Ended December 31,
Accident Year	2008 (unaudited)		2009 (unaudited)		2010 (unaudited)		2011 (unaudited)		2012 (unaudited)		2013 (unaudited)		2014 (unaudited)		2015 (unaudited)		2016 (unaudited)		2017
	($ in millions)
2008	$	65.3	$	138.8	$	155.3	$	173.1	$	187.6	$	189.0	$	190.6	$	191.2	$	191.6	$	192.3
2009				36.6		51.0		54.3		58.9		61.4		61.9		63.3		63.6		63.9
2010						53.0		83.6		92.4		98.6		100.6		101.1		101.5		101.3
2011								61.0		118.4		144.0		154.3		156.1		157.2		157.6
2012										62.0		157.5		181.9		193.5		202.4		216.2
2013												72.7		118.7		134.0		141.1		144.0
2014														93.2		133.8		145.0		148.8
2015																70.8		106.9		120.0
2016																		72.0		127.1
2017																				88.6
Cumulative Paid Loss and LAE for the 2008 through 2017 accident years																			$	1,359.8
Total incurred loss and LAE for the 2008 through 2017 accident years																			$	1,713.1
Cumulative paid loss and LAE for the 2008 through 2017 accident years																				1,359.8
Unpaid loss and LAE, net of reinsurance recoverables, for accident years prior to 2008																				2.3
Unpaid loss and LAE, net of reinsurance recoverables, as of December 31, 2017																			$	355.6

(1) Represents claims reported by insured claimants.

Casualty Insurance | Insurance Segment | RSUI

Supplemental Information About Incurred and Paid Loss and LAE Development and Reconciliation to Consolidated Balance Sheet

Insurance Segment - RSUI - Casualty

	Incurred Loss and LAE, Net of Reinsurance																				As of December 31, 2017
	Year Ended December 31,
Accident  Year	2008  (unaudited)		2009  (unaudited)		2010  (unaudited)		2011  (unaudited)		2012  (unaudited)		2013  (unaudited)		2014  (unaudited)		2015  (unaudited)		2016  (unaudited)		2017		IBNR		Cumulative  Number of Reported Claims(1)
	($ in millions, except reported claims)
2008	$	255.0	$	255.0	$	260.6	$	254.8	$	245.3	$	237.0	$	230.8	$	220.9	$	216.9	$	208.6	$	17.7		7,144
2009				230.1		233.7		234.4		236.3		236.3		232.2		221.8		212.0		199.4		21.8		6,879
2010						204.1		204.1		204.1		203.4		194.6		178.6		177.0		171.0		19.7		6,891
2011								205.9		205.9		208.3		212.1		211.6		206.8		202.0		41.0		7,493
2012										226.3		226.3		230.3		242.8		238.9		233.8		60.5		7,597
2013												264.8		264.8		277.6		280.1		279.0		75.5		8,609
2014														292.0		322.7		321.1		322.4		101.1		10,101
2015																300.2		300.2		304.2		159.4		9,050
2016																		290.7		293.7		178.7		8,280
2017																				282.5		245.9		7,003
Total Incurred Loss and LAE for the 2008 through 2017 accident years																			$	2,496.6
	Paid Loss and LAE, Net of Reinsurance
	Year Ended December 31,
Accident Year	2008 (unaudited)		2009 (unaudited)		2010 (unaudited)		2011 (unaudited)		2012 (unaudited)		2013 (unaudited)		2014 (unaudited)		2015 (unaudited)		2016 (unaudited)		2017
	($ in millions)
2008	$	9.5	$	35.1	$	89.5	$	124.4	$	145.3	$	157.4	$	164.2	$	171.3	$	179.4	$	182.2
2009				7.2		38.0		73.2		101.9		136.9		149.5		157.5		166.4		174.1
2010						4.7		30.9		70.1		90.1		122.6		128.6		132.9		149.2
2011								6.5		31.9		66.7		100.3		118.4		138.5		150.0
2012										6.8		38.4		96.0		125.5		144.0		159.3
2013												10.1		50.0		103.4		146.2		176.6
2014														13.0		69.5		130.1		179.1
2015																9.0		47.3		96.6
2016																		13.7		69.2
2017																				9.4
Cumulative Paid Loss and LAE for the 2008 through 2017 accident years																			$	1,345.7
Total incurred loss and LAE for the 2008 through 2017 accident years																			$	2,496.6
Cumulative paid loss and LAE for the 2008 through 2017 accident years																				1,345.7
Unpaid loss and LAE, net of reinsurance recoverables, for accident years prior to 2008																				60.9
Unpaid loss and LAE, net of reinsurance recoverables, as of December 31, 2017																			$	1,211.8

(1) Represents claims reported by insured claimants.