Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Revenue and Income (Loss) Before Income Taxes for Each Segment

Revenue and income before income taxes for each segment were as follows:

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
(in millions)	2019		2018		2019		2018
Revenue:
Earned premiums
U.S. Operations	$	284.0	$	267.0	$	557.8	$	529.3
International Operations	147.6		150.5		294.3		302.9
Run-off Lines	0.1		0.2		0.1		0.2
Total earned premiums	431.7		417.7		852.2		832.4
Net investment income
U.S. Operations	29.6		20.7		52.7		43.3
International Operations	11.5		8.4		20.6		17.2
Run-off Lines	1.3		2.0		2.7		4.2
Corporate and Other	0.4		2.1		0.7		4.5
Total net investment income	42.8		33.2		76.7		69.2
Fee and other income	2.1		1.9		4.4		3.9
Net realized investment gains (losses)	12.0		10.5		64.5		(5.2		)
Total revenue	$	488.6	$	463.3	$	997.8	$	900.3

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
(in millions)	2019			2018			2019			2018
Income (loss) before income taxes
U.S. Operations	$	53.2		$	42.5		$	96.1		$	76.5
International Operations	(21.0		)	13.2			(4.8		)	36.1
Run-off Lines	(1.1		)	(0.3		)	(0.5		)	(1.0		)
Total segment income before taxes	31.1			55.4			90.8			111.6
Corporate and Other	(11.3		)	(14.3		)	(22.2		)	(24.9		)
Net realized investment and other gains (losses)	12.0			10.5			64.5			(5.2		)
Foreign currency exchange gains	5.3			5.5			4.6			0.6
Other corporate expenses	(7.5		)	—			(8.0		)	—
Total income before income taxes	$	29.6		$	57.1		$	129.7		$	82.1

Schedule of Earned Premiums by Geographic Location

The table below presents earned premiums by geographic location for the three and six months ended June 30, 2019 and 2018. For this disclosure, we determine geographic location by the country of domicile of our subsidiaries that underwrite the business and not by the location of insureds or reinsureds from whom the business was generated.

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
(in millions)	2019		2018		2019		2018
United States	$	283.2	$	265.8	$	555.8	$	527.2
United Kingdom	96.6		102.0		193.7		216.1
Bermuda	19.2		20.9		35.8		41.4
Malta	20.2		15.7		41.0		21.4
All other jurisdictions	12.5		13.3		25.9		26.3
Total earned premiums	$	431.7	$	417.7	$	852.2	$	832.4

Identifiable Assets

The following table represents identifiable assets:

(in millions)	June 30, 2019		December 31, 2018
U.S. Operations	$	5,234.6	$	4,707.8
International Operations	4,380.0		3,984.7
Run-off Lines	367.3		444.8
Corporate and Other	184.8		420.9
Total	$	10,166.7	$	9,558.2