Segment Information (Tables)

6 Months Ended

Jun. 30, 2016

Segment Information [Abstract]

Financial Information with Respect to Business Segments

		Three Months Ended				Six Months Ended
		June 30,				June 30,
(in millions)		2016		2015		2016		2015
Operating revenues:
Commercial Lines	$	616.1	$	598.8	$	1,228.8	$	1,185.5
Personal Lines		384.5		377.7		763.3		751.7
Chaucer		219.8		306.3		452.9		632.8
Other		2.3		1.7		3.8		3.8
Total		1,222.7		1,284.5		2,448.8		2,573.8
Net realized investment gains		(0.7)		12.6		0.8		22.0
Total revenues	$	1,222.0	$	1,297.1	$	2,449.6	$	2,595.8
Operating income (loss) before interest expense and income taxes:
Commercial Lines:
Underwriting income	$	5.1	$	8.5	$	8.8	$	2.6
Net investment income		39.1		39.4		78.5		78.0
Other (expenses) income		(0.2)		0.3		(0.6)		(1.2)
Commercial Lines operating income		44.0		48.2		86.7		79.4
Personal Lines:
Underwriting income		29.3		13.0		57.9		16.4
Net investment income		17.1		18.3		34.5		36.2
Other income		1.0		0.8		2.1		1.8
Personal Lines operating income		47.4		32.1		94.5		54.4
Chaucer:
Underwriting (loss) income		(6.5)		27.5		16.0		63.1
Net investment income		11.3		12.0		22.0		24.3
Other income		0.7		2.5		1.2		3.8
Chaucer operating income		5.5		42.0		39.2		91.2
Other:
Underwriting loss		(0.6)		(0.7)		(1.3)		(1.4)
Net investment income		1.6		1.0		2.4		2.3
Other net expenses		(3.2)		(3.1)		(6.4)		(6.0)
Other operating loss		(2.2)		(2.8)		(5.3)		(5.1)
Operating income before interest expense and income taxes		94.7		119.5		215.1		219.9
Interest on debt		(15.6)		(15.0)		(30.3)		(31.1)
Operating income before income taxes		79.1		104.5		184.8		188.8
Non-operating income items:
Net realized investment (losses) gains		(0.7)		12.6		0.8		22.0
Net gain on disposal of U.K. motor business		0.4		37.7		1.2		37.7
Net loss from repayment of debt		(86.1)		(1.8)		(86.1)		(18.5)
Other non-operating items		0.2		(0.4)		0.3		(0.4)
Income (loss) before income taxes	$	(7.1)	$	152.6	$	101.0	$	229.6

Identifiable Assets by Business Segment

	June 30, 2016		December 31, 2015
(in millions)	Identifiable Assets
U.S. Companies	$	9,907.6	$	9,616.0
Chaucer		4,175.8		4,082.2
Discontinued operations		80.2		83.0
Total	$	14,163.6	$	13,781.2