Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

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
	March 31,
(in millions)	2018			2017
Operating revenues:
Commercial Lines	$	676.6		$	630.5
Personal Lines		434.9			401.8
Chaucer		239.4			224.7
Other		3.4			2.0
Total		1,354.3			1,259.0
Net realized and unrealized investment (losses) gains		(23.4	)		1.9
Total revenues	$	1,330.9		$	1,260.9
Operating income (loss) before interest expense and income taxes:
Commercial Lines:
Underwriting income (loss)	$	16.4		$	(2.7	)
Net investment income		45.3			40.3
Other expense		(0.2	)		(0.2	)
Commercial Lines operating income		61.5			37.4
Personal Lines:
Underwriting income (loss)		14.7			(8.4	)
Net investment income		18.4			17.1
Other income		1.3			1.2
Personal Lines operating income		34.4			9.9
Chaucer:
Underwriting income		6.2			13.8
Net investment income		16.4			12.4
Other income (expense)		0.3			(1.3	)
Chaucer operating income		22.9			24.9
Other:
Underwriting loss		(1.3	)		(0.9	)
Net investment income		2.8			1.3
Other expense		(3.7	)		(3.5	)
Other operating loss		(2.2	)		(3.1	)
Operating income before interest expense and income taxes		116.6			69.1
Interest on debt		(12.4	)		(12.0	)
Operating income before income taxes		104.2			57.1
Non-operating income items:
Net realized and unrealized investment (losses) gains		(23.4	)		1.9
Other non-operating items		(0.2	)		—
Income before income taxes	$	80.6		$	59.0

Identifiable Assets by Business Segment

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

	March 31, 2018		December 31, 2017
(in millions)	Identifiable Assets
U.S. Companies	$	10,820.0	$	10,909.2
Chaucer		4,424.9		4,472.4
Discontinued operations		89.3		88.0
Total	$	15,334.2	$	15,469.6