Segment Information (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

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

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

	Successor		Predecessor
(in millions)	Three Months Ended March 31, 2024		Three Months Ended March 31, 2023
Revenue:
Net earned premiums
U.S. Operations	$	286.7	$	325.6
International Operations	26.9		64.3
Run-off Lines	0.1		—
Total net earned premiums	313.7		389.9
Net investment income
U.S. Operations	50.0		24.4
International Operations	7.2		4.6
Run-off Lines	1.6		0.7
Total net investment income	58.8		29.7
Net investment and other gains (losses)	6.2		(17.9)
Total revenue	$	378.7	$	401.7

	Successor		Predecessor
(in millions)	Three Months Ended March 31, 2024		Three Months Ended March 31, 2023
Income (loss) before income taxes
U.S. Operations	$	32.2	$	(4.6)
International Operations	(7.8)		2.4
Run-off Lines	(0.2)		(0.7)
Total segment income (loss) before income taxes	24.2		(2.9)
Corporate and Other	(5.2)		(18.8)
Net investment and other gains (losses)	6.2		(17.9)
Foreign currency exchange gains (losses)	2.0		(2.7)
Total income (loss) before income taxes	$	27.2	$	(42.3)

Schedule of Earned Premiums by Geographic Location

The table below presents net earned premiums by geographic location for the three months ended March 31, 2024 and 2023. 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.

	Successor		Predecessor
(in millions)	Three Months Ended March 31, 2024		Three Months Ended March 31, 2023
United States	$	286.8	$	325.6
United Kingdom	—		48.3
Bermuda	26.9		13.2
All other jurisdictions	—		2.8
Total earned premiums	$	313.7	$	389.9

Identifiable Assets

The following table represents identifiable assets:

	As of
(in millions)	March 31, 2024		December 31, 2023
U.S. Operations	$	6,678.5	$	6,279.0
International Operations	1,635.2		1,888.9
Run-off Lines	231.6		221.4
Corporate and Other	101.8		113.8
Total assets	$	8,647.1	$	8,503.1