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Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Reconciliation of operating results by reportable segment

The following table presents the Company's operating results by reportable segment:

	Three Months Ended March 31,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Net premiums earned	$	863.1			$	7.1			$	870.2			$	800.3			$	7.8			$	808.1
Less:
Losses and loss adjustment expenses	626.8				3.6				630.4				628.3				3.9				632.2
Underwriting expenses	212.5				3.4				215.9				202.6				3.8				206.4
Underwriting gain (loss)	23.8				0.1				23.9				(30.6		)		0.1				(30.5		)
Investment income									34.2												31.5
Net realized investment gains (losses)									111.1												(58.7		)
Other income									2.3												2.3
Interest expense									(4.3		)										(4.3		)
Pre-tax income (loss)									$	167.2											$	(59.7	)
Net income (loss)									$	135.9											$	(42.6	)

Schedule direct premiums attributable to segment

The following table presents the Company’s net premiums earned and direct premiums written by line of insurance business:

	Three Months Ended March 31,
	2019												2018
	Property & Casualty				Other				Total				Property & Casualty				Other				Total
	(Amounts in millions)
Private passenger automobile	$	672.6			$	—			$	672.6			$	627.0			$	—			$	627.0
Homeowners	119.3				—				119.3				107.8				—				107.8
Commercial automobile	49.6				—				49.6				44.9				—				44.9
Other	21.6				7.1				28.7				20.6				7.8				28.4
Net premiums earned	$	863.1			$	7.1			$	870.2			$	800.3			$	7.8			$	808.1
Private passenger automobile	$	705.3			$	—			$	705.3			$	674.0			$	—			$	674.0
Homeowners	130.9				—				130.9				115.3				—				115.3
Commercial automobile	54.4				—				54.4				49.7				—				49.7
Other	24.7				6.8				31.5				23.6				6.4				30.0
Direct premiums written	$	915.3			$	6.8			$	922.1			$	862.6			$	6.4			$	869.0

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- Definition

Disclosure of direct premium written by line of business.

+ References

No definition available.

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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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