Run-off Lines (Tables)

12 Months Ended

Dec. 31, 2022

Discontinued Operations and Disposal Groups [Abstract]

Disposal Groups, Including Discontinued Operations

The table below reflects the carrying amounts of assets and liabilities held-for-sale related to the pending disposition described above:

(in millions)	December 31, 2022
Assets
Investments:
Fixed maturities available-for-sale, at fair value	$	490.6
Other investments	81.6
Short-term investments, at fair value	114.1
Total investments	686.4
Cash	70.8
Accrued investment income	2.1
Premiums receivable	331.9
Reinsurance recoverables	733.1
Current income taxes receivable, net	6.3
Deferred tax asset, net	28.1
Deferred acquisition costs, net	69.4
Ceded unearned premiums	76.1
Other assets	62.0
Total assets	$	2,066.2
Liabilities
Reserves for losses and loss adjustment expenses	993.4
Unearned premiums	335.6
Accrued underwriting expenses and other liabilities	34.4
Ceded reinsurance payable, net	323.5
Funds held	172.9
Other indebtedness	54.7
Total liabilities	$	1,914.5

The following table presents our gross reserves for Run-off Lines:

	December 31,
(in millions)	2022		2021
Asbestos and Environmental:
Reinsurance assumed	$	31.1	$	29.6
Other	34.4		34.2
Total Asbestos and Environmental	65.5		63.8
Risk-management	144.6		162.6
Run-off reinsurance lines	0.4		0.5
Other run-off lines	22.6		34.3
Gross reserves - Run-off Lines	$	233.1	$	261.2

Total Gross Reserves for Asbestos Exposure

The following table represents the total gross reserves for our asbestos exposure:

	December 31,
(in millions)	2022		2021		2020
Direct written
Case reserves	$	3.2	$	3.0	$	3.1
Unallocated loss adjustment expense ("ULAE")	0.5		0.5		0.5
Incurred but not reported ("IBNR")	17.4		19.9		20.2
Total direct written reserves	21.1		23.4		23.8
Assumed domestic
Case reserves	6.8		7.4		8.4
ULAE	0.8		0.8		0.8
IBNR	13.0		11.9		12.8
Total assumed domestic reserves	20.6		20.1		22.0
Assumed London
Case reserves	2.4		2.1		1.4
IBNR	2.6		2.3		1.6
Total assumed London reserves	5.0		4.4		3.0
Total asbestos reserves	$	46.7	$	47.9	$	48.8

Underwriting Losses for Run-Off Lines

The following table presents our underwriting losses for Run-off Lines: 

	For the Years Ended December 31,
(in millions)	2022		2021		2020
Asbestos and Environmental:
Reinsurance assumed	$	3.5	$	4.7	$	5.7
Other	7.0		10.0		11.7
Total Asbestos and Environmental	10.5		14.7		17.4
Risk-management	1.4		9.9		(7.6)
Run-off reinsurance lines	—		—		(0.4)
Other run-off lines	(8.3)		20.1		3.4
Total underwriting loss - Run-off Lines	$	3.6	$	44.7	$	12.8