Segment Information (Tables)

9 Months Ended

Sep. 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						Nine Months Ended
	September 30,						September 30,
(in millions)	2021			2020			2021			2020
Operating revenues:
Commercial Lines	$	755.5		$	713.3		$	2,261.8		$	2,136.9
Personal Lines		512.6			493.3			1,506.3			1,438.1
Other		4.3			5.5			12.4			15.5
Total		1,272.4			1,212.1			3,780.5			3,590.5
Net realized and unrealized investment gains (losses)		4.0			37.7			72.6			(60.2	)
Total revenues	$	1,276.4		$	1,249.8		$	3,853.1		$	3,530.3
Operating income (loss) before interest expense and income taxes:
Commercial Lines:
Underwriting (loss) income	$	(10.2	)	$	18.7		$	(5.7	)	$	50.4
Net investment income		52.9			44.4			155.7			128.7
Other expense		(0.3	)		(0.8	)		(1.0	)		(6.9	)
Commercial Lines operating income		42.4			62.3			149.0			172.2
Personal Lines:
Underwriting (loss) income		(20.3	)		43.0			48.1			104.5
Net investment income		22.6			19.5			66.5			56.3
Other income		1.3			1.7			3.0			0.9
Personal Lines operating income		3.6			64.2			117.6			161.7
Other:
Underwriting loss		(0.4	)		(0.3	)		(1.0	)		(4.0	)
Net investment income		3.3			3.7			9.0			9.9
Other expense		(1.9	)		(1.5	)		(5.2	)		(5.4	)
Other operating income		1.0			1.9			2.8			0.5
Operating income before interest expense and income taxes		47.0			128.4			269.4			334.4
Interest on debt		(8.5	)		(9.8	)		(25.5	)		(28.6	)
Operating income before income taxes		38.5			118.6			243.9			305.8
Non-operating items:
Net realized and unrealized investment gains (losses)		4.0			37.7			72.6			(60.2	)
Loss from repayment of debt		—			(6.1	)		—			(6.2	)
Other non-operating		—			(1.6	)		—			(1.6	)
Income from continuing operations before income taxes	$	42.5		$	148.6		$	316.5		$	237.8

Identifiable Assets by Business Segment

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

(in millions)	September 30, 2021		December 31, 2020
Property and Casualty Insurance Companies	$	13,997.9	$	13,333.5
Assets of discontinued businesses		107.4		110.2
Total	$	14,105.3	$	13,443.7