Liabilities For Outstanding Claims, Losses And Loss Adjustment Expenses (Tables)

12 Months Ended

Dec. 31, 2018

Insurance [Abstract]

Schedule of Liability for Unpaid Losses and Loss Adjustment Expenses

The table below provides a reconciliation of the gross beginning and ending reserve for unpaid losses and loss adjustment expenses.

YEARS ENDED DECEMBER 31	2018			2017			2016
(in millions)
Gross loss and LAE reserves, beginning of year	$	5,058.5		$	4,660.0		$	4,201.9
Reinsurance recoverable on unpaid losses		1,455.0			1,349.2			1,295.3
Net loss and LAE reserves, beginning of year		3,603.5			3,310.8			2,906.6
Net incurred losses and LAE in respect of losses    occurring in:
Current year		2,733.5			2,579.8			2,307.8
Prior years		(8.9	)		(0.2	)		238.2
Total incurred losses and LAE		2,724.6			2,579.6			2,546.0
Net payments of losses and LAE in respect of losses    occurring in:
Current year		1,232.3			1,203.8			1,063.0
Prior years		1,264.3			1,083.1			1,078.8
Total payments		2,496.6			2,286.9			2,141.8
Net reserve for losses and LAE, end of year		3,831.5			3,603.5			3,310.8
Reinsurance recoverable on unpaid losses		1,472.6			1,455.0			1,349.2
Gross reserve for losses and LAE, end of year	$	5,304.1		$	5,058.5		$	4,660.0

Schedule of (Favorable)/Unfavorable Loss and LAE Reserve Development

YEARS ENDED DECEMBER 31	2018			2017			2016
(in millions)
Commercial multiple peril	$	(4.0	)	$	2.9		$	68.8
Workers’ compensation		(31.0	)		(9.1	)		(46.7	)
Commercial automobile		23.2			2.3			27.5
Other commercial lines:
AIX program business		17.0			(1.9	)		75.1
General liability		(21.1	)		(1.9	)		56.0
Surety		(9.0	)		0.1			35.3
Umbrella		2.3			0.9			(8.9	)
Other lines		(18.3	)		(4.1	)		12.2
Total other commercial lines		(29.1	)		(6.9	)		169.7
Total Commercial Lines		(40.9	)		(10.8	)		219.3
Personal automobile		14.3			3.4			4.8
Homeowners and other personal lines		16.5			6.0			5.8
Total Personal Lines		30.8			9.4			10.6
Total Other Segment		1.2			1.2			8.3
Total loss and LAE reserve development, including    catastrophes	$	(8.9	)	$	(0.2	)	$	238.2

Schedule of Carried Reserves

YEARS ENDED DECEMBER 31,	2018							2017
(in millions)	Gross		Ceded			Net		Gross		Ceded			Net
Commercial multiple peril	$	1,206.5	$	(110.8	)	$	1,095.7	$	1,104.9	$	(108.9	)	$	996.0
Workers’ compensation		775.9		(183.0	)		592.9		757.8		(180.8	)		577.0
Commercial automobile liability		433.5		(25.5	)		408.0		428.1		(27.6	)		400.5
General liability and umbrella - occurrence		534.1		(133.5	)		400.6		508.5		(126.2	)		382.3
General liability - claims made		245.9		(16.2	)		229.7		231.6		(17.9	)		213.7
Other lines		400.6		(78.4	)		322.2		408.3		(108.8	)		299.5
Total Commercial Lines and other		3,596.5		(547.4	)		3,049.1		3,439.2		(570.2	)		2,869.0
Personal automobile liability		1,514.0		(917.3	)		596.7		1,453.8		(878.8	)		575.0
Homeowners		158.2		(6.0	)		152.2		133.5		(4.4	)		129.1
Other personal lines		35.4		(1.9	)		33.5		32.0		(1.6	)		30.4
Total Personal Lines		1,707.6		(925.2	)		782.4		1,619.3		(884.8	)		734.5
Total loss and LAE reserves	$	5,304.1	$	(1,472.6	)	$	3,831.5	$	5,058.5	$	(1,455.0	)	$	3,603.5

Schedule of Incurred Claims Development

Commercial multiple peril
(in millions)															As of
Incurred Losses and ALAE, Net of Reinsurance															December 31, 2018
YEARS ENDED DECEMBER 31,																	Cumulative
																	Incurred
Accident	2012		2013		2014		2015										Claim
Year	Unaudited		Unaudited		Unaudited		Unaudited		2016		2017		2018		IBNR		Count
2012	$	480.0	$	462.8	$	456.2	$	459.7	$	475.6	$	474.9	$	476.6	$	8.8		16,983
2013				380.0		362.5		367.9		391.8		392.1		393.0		10.2		14,830
2014						443.9		439.6		464.8		459.4		449.1		22.6		15,922
2015								446.0		456.3		463.7		467.4		33.0		15,731
2016										447.1		449.6		448.7		55.5		15,981
2017												538.7		544.8		122.2		16,674
2018														578.2		228.3		16,716
Total													$	3,357.8
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2012		2013		2014		2015
Year	Unaudited		Unaudited		Unaudited		Unaudited		2016		2017		2018
2012	$	175.8	$	307.5	$	350.8	$	389.3	$	424.2	$	442.8	$	454.9
2013				137.6		221.5		262.3		306.4		334.6		355.9
2014						171.7		267.8		316.0		363.4		395.2
2015								161.9		260.1		315.6		363.2
2016										140.3		237.9		290.2
2017												170.9		296.4
2018														178.8
Total													$	2,334.6
Total reserves for 2012 – 2018 accident years (incurred - paid)														1,023.2
Total reserves for 2011 and prior accident years														53.2
Unallocated loss adjustment expense														19.3
Net reserves at December 31, 2018													$	1,095.7

Workers' compensation
(in millions)																					As of
Incurred Losses and ALAE, Net of Reinsurance																					December 31, 2018
YEARS ENDED DECEMBER 31,																							Cumulative
																							Incurred
Accident	2009		2010		2011		2012		2013		2014		2015										Claim
Year	Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		2016		2017		2018		IBNR		Count
2009	$	93.8	$	87.6	$	82.5	$	80.3	$	79.4	$	79.2	$	77.5	$	77.5	$	77.9	$	78.7	$	1.9		8,032
2010				115.5		116.9		115.8		115.9		116.3		114.9		114.7		115.9		116.5		3.3		10,174
2011						141.4		144.2		144.3		145.5		143.8		146.7		148.3		147.9		7.1		12,465
2012								176.3		171.1		165.2		157.2		162.9		163.7		163.7		10.2		13,042
2013										179.3		167.4		160.1		154.4		155.3		155.4		12.3		11,683
2014												182.1		172.9		154.7		152.1		150.3		15.2		10,880
2015														189.6		164.2		157.5		150.3		22.5		11,417
2016																189.6		180.5		164.6		24.5		15,790
2017																		186.1		172.1		35.4		16,405
2018																				187.2		69.4		15,711
Total																			$	1,486.7
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2009		2010		2011		2012		2013		2014		2015
Year	Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		2016		2017		2018
2009	$	19.2	$	41.2	$	54.6	$	61.6	$	65.4	$	68.6	$	69.8	$	70.8	$	72.4	$	73.1
2010				22.1		57.2		76.9		89.5		96.5		101.0		104.2		106.3		107.2
2011						30.0		71.3		97.3		114.0		122.9		128.0		130.9		132.8
2012								30.4		74.8		102.6		120.1		130.7		136.0		141.4
2013										30.9		74.6		101.2		114.0		122.8		127.4
2014												30.6		70.5		92.3		105.6		112.5
2015														28.0		65.7		87.2		99.4
2016																33.9		78.1		99.5
2017																		32.8		73.0
2018																				35.6
Total																			$	1,001.9
Total reserves for 2009 – 2018 accident years (incurred - paid)																				484.8
Total reserves for 2008 and prior accident years																				91.1
Unallocated loss adjustment expense and other																				17.0
Net reserves at December 31, 2018																			$	592.9

Commercial automobile liability
(in millions)													As of
Incurred Losses and ALAE, Net of Reinsurance													December 31, 2018
YEARS ENDED DECEMBER 31,															Cumulative
															Incurred
Accident	2013		2014		2015										Claim
Year	Unaudited		Unaudited		Unaudited		2016		2017		2018		IBNR		Count
2013	$	177.7	$	179.4	$	205.3	$	227.5	$	225.6	$	231.0	$	1.4		15,274
2014				168.5		163.3		177.3		181.7		185.1		6.4		13,477
2015						163.4		168.3		166.9		167.8		10.0		12,838
2016								157.0		157.7		163.0		16.4		11,629
2017										159.5		170.1		43.4		11,343
2018												182.8		110.7		10,338
Total											$	1,099.8
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2013		2014		2015
Year	Unaudited		Unaudited		Unaudited		2016		2017		2018
2013	$	35.9	$	89.6	$	137.6	$	176.3	$	200.6	$	214.9
2014				33.1		70.8		102.7		137.1		168.2
2015						32.2		63.8		96.4		129.3
2016								27.8		60.7		98.3
2017										26.9		71.2
2018												29.2
Total											$	711.1
Total reserves for 2013 – 2018 accident years (incurred - paid)												388.7
Total reserves for 2012 and prior accident years												14.4
Unallocated loss adjustment expense												4.9
Net reserves at December 31, 2018											$	408.0

General liability and umbrella - occurrence
(in millions)																	As of
Incurred Losses and ALAE, Net of Reinsurance																	December 31, 2018
YEARS ENDED DECEMBER 31,																			Cumulative
																			Incurred
Accident	2011		2012		2013		2014		2015										Claim
Year	Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		2016		2017		2018		IBNR		Count
2011	$	47.6	$	43.8	$	38.2	$	42.2	$	51.0	$	55.6	$	55.4	$	57.5	$	3.3		1,398
2012				77.2		59.3		62.2		64.3		71.1		74.2		69.1		3.7		1,779
2013						84.1		67.4		71.5		88.6		84.4		81.2		8.2		2,031
2014								100.9		82.3		98.6		101.4		98.3		10.6		2,133
2015										104.2		99.3		99.6		97.0		21.3		2,550
2016												95.6		100.7		101.5		33.9		2,015
2017														97.7		107.6		54.2		1,844
2018																99.8		74.4		1,917
Total															$	712.0
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2011		2012		2013		2014		2015
Year	Unaudited		Unaudited		Unaudited		Unaudited		Unaudited		2016		2017		2018
2011	$	1.6	$	6.7	$	19.4	$	31.1	$	39.8	$	45.8	$	47.8	$	50.6
2012				2.2		12.6		29.8		43.8		52.1		60.6		63.0
2013						2.4		11.0		26.8		43.1		56.1		63.5
2014								3.1		14.5		31.4		52.8		70.4
2015										3.3		15.2		30.8		48.5
2016												3.1		15.0		31.6
2017														4.4		17.0
2018																4.1
Total															$	348.7
Total reserves for 2011 – 2018 accident years (incurred - paid)																363.3
Total reserves for 2010 and prior accident years																25.8
Unallocated loss adjustment expense and other																11.5
Net reserves at December 31, 2018															$	400.6

General liability - claims made
(in millions)													As of
Incurred Losses and ALAE, Net of Reinsurance													December 31, 2018
YEARS ENDED DECEMBER 31,															Cumulative
															Incurred
Accident	2013		2014		2015										Claim
Year	Unaudited		Unaudited		Unaudited		2016		2017		2018		IBNR		Count
2013	$	54.9	$	55.4	$	60.6	$	71.4	$	69.2	$	68.4	$	0.9		645
2014				61.7		69.9		83.9		86.2		82.5		2.9		907
2015						93.2		98.8		98.4		90.2		4.9		1,035
2016								103.6		101.7		97.1		18.4		1,082
2017										103.3		104.6		35.5		1,310
2018												120.9		59.5		2,586
Total											$	563.7
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2013		2014		2015
Year	Unaudited		Unaudited		Unaudited		2016		2017		2018
2013	$	9.3	$	36.2	$	53.7	$	61.1	$	64.5	$	65.7
2014				11.0		38.8		59.1		71.5		75.4
2015						10.0		43.6		64.2		76.0
2016								11.1		42.9		66.1
2017										12.3		42.3
2018												17.3
Total											$	342.8
Total reserves for 2013– 2018 accident years (incurred - paid)												220.9
Total reserves for 2012 and prior accident years												4.0
Unallocated loss adjustment expense												4.8
Net reserves at December 31, 2018											$	229.7

Personal automobile liability
(in millions)											As of
Incurred Losses and ALAE, Net of Reinsurance											December 31, 2018
YEARS ENDED DECEMBER 31,													Cumulative
													Incurred
Accident	2014		2015										Claim
Year	Unaudited		Unaudited		2016		2017		2018		IBNR		Count
2014	$	323.1	$	304.1	$	308.8	$	310.2	$	312.5	$	4.7		43,356
2015				327.4		334.1		328.6		332.4		5.6		42,358
2016						337.9		344.5		355.3		11.5		42,214
2017								363.6		362.3		35.0		42,200
2018										394.2		151.7		39,164
Total									$	1,756.7
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2014		2015
Year	Unaudited		Unaudited		2016		2017		2018
2014	$	107.2	$	188.6	$	241.1	$	279.4	$	298.4
2015				112.9		205.4		261.5		301.9
2016						112.8		213.1		288.0
2017								115.0		229.2
2018										121.7
Total									$	1,239.2
Total reserves for 2014 – 2018 accident years (incurred - paid)										517.5
Total reserves for 2013 and prior accident years										65.4
Unallocated loss adjustment expense										13.8
Net reserves at December 31, 2018									$	596.7

Homeowners
(in millions)									As of
Incurred Losses and ALAE, Net of Reinsurance									December 31, 2018
YEARS ENDED DECEMBER 31,											Cumulative
											Incurred
Accident	2015										Claim
Year	Unaudited		2016		2017		2018		IBNR		Count
2015	$	267.1	$	272.0	$	272.0	$	274.2		1.7		30,436
2016				222.1		226.5		231.4		3.2		25,456
2017						291.4		296.5		3.4		33,394
2018								312.9		46.0		30,487
Total							$	1,115.0
Cumulative Paid Losses and ALAE, Net of Reinsurance
YEARS ENDED DECEMBER 31,
Accident	2015
Year	Unaudited		2016		2017		2018
2015	$	199.9	$	253.8	$	260.6	$	267.5
2016				154.3		207.9		218.2
2017						204.5		271.6
2018								213.7
Total							$	971.0
Total reserves for 2015 – 2018 accident years (incurred - paid)								144.0
Total reserves for 2014 and prior accident years								4.8
Unallocated loss adjustment expense								3.4
Net reserves at December 31, 2018							$	152.2

Computation of Historical Claims on Paid and Incurred Claims Data, Net of Reinsurance

Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance:
Unaudited
	1			2			3			4			5			6			7			8			9			10
Commercial multiple peril		34.0	%		22.7	%		10.7	%		10.0	%		7.2	%		4.7	%		2.5	%
Workers' compensation		20.0	%		27.0	%		15.9	%		9.6	%		5.6	%		3.5	%		2.4	%		1.4	%		1.4	%		0.8	%
Commercial automobile liability		16.9	%		21.7	%		20.1	%		18.3	%		13.7	%		6.2	%
General liability and umbrella    - occurrence		3.4	%		11.7	%		19.4	%		20.1	%		15.3	%		10.6	%		3.5	%		4.9	%
General liability - claims made		12.6	%		34.4	%		24.3	%		12.9	%		4.8	%		1.7	%
Personal automobile liability		32.5	%		28.4	%		18.3	%		12.2	%		6.1	%
Homeowners		69.2	%		21.8	%		3.4	%		2.5	%