Segment Information (Tables)

9 Months Ended

Sep. 30, 2020

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 September 30,
	2020						2019
	Property & Casualty		Other		Total		Property & Casualty		Other		Total
	(Amounts in millions)
Net premiums earned	$	892.0	$	7.3	$	899.3	$	907.9	$	7.1	$	915.0
Less:
Losses and loss adjustment expenses	614.9		3.8		618.7		677.3		3.6		680.9
Underwriting expenses	225.4		3.7		229.1		217.8		3.5		221.3
Underwriting gain (loss)	51.7		(0.2)		51.5		12.8		—		12.8
Investment income					32.1						36.4
Net realized investment gains					64.4						33.3
Other income					2.9						2.6
Interest expense					(4.3)						(4.3)
Pre-tax income					$	146.6					$	80.8
Net income					$	118.9					$	69.3

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 September 30,
	2020						2019
	Property & Casualty		Other		Total		Property & Casualty		Other		Total
	(Amounts in millions)
Private passenger automobile	$	653.0	$	—	$	653.0	$	698.2	$	—	$	698.2
Homeowners	151.2		—		151.2		133.5		—		133.5
Commercial automobile	57.8		—		57.8		53.5		—		53.5
Other	30.0		7.3		37.3		22.7		7.1		29.8
Net premiums earned	$	892.0	$	7.3	$	899.3	$	907.9	$	7.1	$	915.0
Private passenger automobile	$	667.4	$	—	$	667.4	$	743.9	$	—	$	743.9
Homeowners	183.7		—		183.7		162.9		—		162.9
Commercial automobile	62.0		—		62.0		55.2		—		55.2
Other	35.9		8.0		43.9		25.8		9.2		35.0
Direct premiums written	$	949.0	$	8.0	$	957.0	$	987.8	$	9.2	$	997.0