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Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Reconciliation of operating results by reportable segment

The following tables present the Company's operating results by reportable segment:

	Three Months Ended June 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Net premiums earned	$	881.8			$	7.0			$	888.8			$	826.2			$	7.8			$	834.0
Less:
Losses and loss adjustment expenses	653.3				3.3				656.6				601.5				4.0				605.5
Underwriting expenses	213.5				3.5				217.0				198.7				3.8				202.5
Underwriting gain	15.0				0.2				15.2				26.0				—				26.0
Investment income									35.0												34.8
Net realized investment gains									53.3												14.3
Other income									2.4												2.4
Interest expense									(4.3		)										(4.3		)
Pre-tax income									$	101.6											$	73.2
Net income									$	83.3											$	60.2

	Six Months Ended June 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Net premiums earned	$	1,744.9			$	14.1			$	1,759.0			$	1,626.4			$	15.6			$	1,642.0
Less:
Losses and loss adjustment expenses	1,280.1				6.9				1,287.0				1,229.9				7.9				1,237.8
Underwriting expenses	426.0				6.9				432.9				401.2				7.6				408.8
Underwriting gain (loss)	38.8				0.3				39.1				(4.7		)		0.1				(4.6		)
Investment income									69.2												66.3
Net realized investment gains (losses)									164.4												(44.4		)
Other income									4.6												4.7
Interest expense									(8.5		)										(8.5		)
Pre-tax income									$	268.8											$	13.5
Net income									$	219.1											$	17.6

Schedule direct premiums attributable to segment

The following tables present the Company’s net premiums earned and direct premiums written by reportable segment and line of insurance business:

	Three Months Ended June 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Private passenger automobile	$	684.3			$	—			$	684.3			$	645.6			$	—			$	645.6
Homeowners	123.9				—				123.9				112.7				—				112.7
Commercial automobile	51.4				—				51.4				46.7				—				46.7
Other	22.2				7.0				29.2				21.2				7.8				29.0
Net premiums earned	$	881.8			$	7.0			$	888.8			$	826.2			$	7.8			$	834.0
Private passenger automobile	$	697.6			$	—			$	697.6			$	666.0			$	—			$	666.0
Homeowners	159.0				—				159.0				138.0				—				138.0
Commercial automobile	55.8				—				55.8				49.9				—				49.9
Other	25.7				8.0				33.7				25.5				7.2				32.7
Direct premiums written	$	938.1			$	8.0			$	946.1			$	879.4			$	7.2			$	886.6

	Six Months Ended June 30,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Private passenger automobile	$	1,356.9			$	—			$	1,356.9			$	1,272.5			$	—			$	1,272.5
Homeowners	243.2				—				243.2				220.5				—				220.5
Commercial automobile	101.0				—				101.0				91.6				—				91.6
Other	43.8				14.1				57.9				41.8				15.6				57.4
Net premiums earned	$	1,744.9			$	14.1			$	1,759.0			$	1,626.4			$	15.6			$	1,642.0
Private passenger automobile	$	1,402.9			$	—			$	1,402.9			$	1,340.0			$	—			$	1,340.0
Homeowners	289.9				—				289.9				253.3				—				253.3
Commercial automobile	110.2				—				110.2				99.6				—				99.6
Other	50.4				14.8				65.2				49.1				13.6				62.7
Direct premiums written	$	1,853.4			$	14.8			$	1,868.2			$	1,742.0			$	13.6			$	1,755.6

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- Definition

Disclosure of direct premium written by line of business.

+ References

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- Definition

Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8924-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599

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