Segment Information (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Financial Information with Respect to Business Segments

Summarized below is financial information with respect to the Company’s business segments.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(in millions)	2021			2020			2021			2020
Operating revenues:
Commercial Lines	$	758.0		$	698.9		$	1,506.3		$	1,423.6
Personal Lines		500.4			456.3			993.7			944.8
Other		3.9			5.4			8.1			10.0
Total		1,262.3			1,160.6			2,508.1			2,378.4
Net realized and unrealized investment gains (losses)		31.1			63.7			68.6			(97.9	)
Total revenues	$	1,293.4		$	1,224.3		$	2,576.7		$	2,280.5
Operating income (loss) before interest expense and income taxes:
Commercial Lines:
Underwriting income	$	53.8		$	21.3		$	4.5		$	31.7
Net investment income		51.0			37.9			102.8			84.3
Other expense		(0.4	)		(3.9	)		(0.7	)		(6.1	)
Commercial Lines operating income		104.4			55.3			106.6			109.9
Personal Lines:
Underwriting income		9.5			17.4			68.4			61.5
Net investment income		21.8			16.5			43.9			36.8
Other income (expense)		0.9			(1.3	)		1.7			(0.8	)
Personal Lines operating income		32.2			32.6			114.0			97.5
Other:
Underwriting loss		(0.3	)		(0.4	)		(0.6	)		(3.7	)
Net investment income		2.8			3.3			5.7			6.2
Other expense		(1.8	)		(1.9	)		(3.3	)		(3.9	)
Other operating income (loss)		0.7			1.0			1.8			(1.4	)
Operating income before interest expense and income taxes		137.3			88.9			222.4			206.0
Interest on debt		(8.5	)		(9.4	)		(17.0	)		(18.8	)
Operating income before income taxes		128.8			79.5			205.4			187.2
Non-operating items:
Net realized and unrealized investment gains (losses)		31.1			63.7			68.6			(97.9	)
Other non-operating		—			(0.1	)		—			(0.1	)
Income from continuing operations before income taxes	$	159.9		$	143.1		$	274.0		$	89.2

Identifiable Assets by Business Segment

The following table provides identifiable assets for the Company’s business segments and discontinued operations:

(in millions)	June 30, 2021		December 31, 2020
Property and Casualty Insurance Companies	$	13,618.6	$	13,333.5
Assets of discontinued businesses		109.5		110.2
Total	$	13,728.1	$	13,443.7