Segment Information (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

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

Revenue and (loss) 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)	2020		2019		2020		2019
Revenue:
Earned premiums
U.S. Operations	$	301.6	$	284.0	$	604.1	$	557.8
International Operations	131.8		147.6		264.1		294.3
Run-off Lines	—		0.1		0.2		0.1
Total earned premiums	433.4		431.7		868.4		852.2
Net investment income
U.S. Operations	0.8		29.6		26.0		52.7
International Operations	0.5		11.5		9.1		20.6
Run-off Lines	0.1		1.3		1.3		2.7
Corporate and Other	0.1		0.4		0.6		0.7
Total net investment income	1.5		42.8		37.0		76.7
Fee and other income	2.0		2.1		4.1		4.4
Net realized investment gains (losses)	20.1		12.0		(16.0)		64.5
Total revenue	$	457.0	$	488.6	$	893.5	$	997.8

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
(in millions)	2020		2019		2020		2019
Income (loss) before income taxes
U.S. Operations	$	31.2	$	53.2	$	68.1	$	96.1
International Operations	(27.5)		(21.0)		(39.8)		(4.8)
Run-off Lines	(1.3)		(1.1)		(0.8)		(0.5)
Total segment income before taxes	2.4		31.1		27.5		90.8
Corporate and Other	(7.9)		(11.3)		(18.2)		(22.2)
Net realized investment and other gains (losses)	20.1		12.0		(16.0)		64.5
Foreign currency exchange (losses) gains	(6.4)		5.3		(3.4)		4.6
Other corporate expenses	(2.5)		(7.5)		(5.8)		(8.0)
Total income (loss) before income taxes	$	5.7	$	29.6	$	(15.9)	$	129.7

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, 2020 and 2019. 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)	2020		2019		2020		2019
United States	$	301.4	$	283.2	$	601.1	$	555.8
United Kingdom	75.5		96.6		162.2		193.7
Bermuda	25.3		19.2		46.5		35.8
Malta	18.5		20.2		30.3		41.0
All other jurisdictions	12.7		12.5		28.3		25.9
Total earned premiums	$	433.4	$	431.7	$	868.4	$	852.2

Identifiable Assets

The following table represents identifiable assets:

(in millions)	June 30, 2020		December 31, 2019
U.S. Operations	$	5,744.9	$	5,009.0
International Operations	4,132.2		5,002.4
Run-off Lines	331.1		356.9
Corporate and Other	188.5		146.2
Total	$	10,396.7	$	10,514.5