Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Investments:
Fixed maturities available-for-sale, at fair value (cost: 2023 - $2,521.5, 2022 - $3,016.4; allowance for expected credit losses: 2023 - $0.2, 2022 - $2.8)	$ 2,585.4	$ 2,675.5
Commercial mortgage loans (cost: 2023 - $144.8, 2022 - $159.9; allowance for expected credit losses: 2023 - $0.2, 2022 - $0.2)	144.6	159.7
Equity securities, at fair value (cost: 2023 - $11.7; 2022 - $54.7)	10.7	43.9
Other investments (cost: 2023 - $311.0; 2022 - $323.2)	311.0	323.2
Short-term investments, at fair value (cost: 2023 - $429.0; 2022 - $449.4)	429.5	449.6
Investments	3,481.2	3,651.9
Cash, restricted cash and cash equivalents	791.6	50.2
Accrued investment income	20.4	18.6
Premiums receivable	230.7	292.0
Reinsurance recoverables	2,959.3	3,029.1
Goodwill	0.0	118.6
Other intangible assets, net of accumulated amortization	180.6	0.0
Current income taxes receivable, net	53.1	44.9
Deferred tax assets, net	39.1	101.2
Deferred acquisition costs, net	7.2	107.0
Ceded unearned premiums	356.0	375.5
Operating lease right-of-use assets	51.2	57.7
Other assets	189.1	121.5
Value of business acquired, net of accumulated amortization	143.6	0.0
Assets held-for-sale	0.0	2,066.2
Total assets	8,503.1	10,034.4
Liabilities and Stockholders' Equity
Reserves for losses and loss adjustment expenses	5,544.5	5,051.6
Unearned premiums	916.6	1,039.9
Accrued underwriting expenses and other liabilities	73.9	121.3
Ceded reinsurance payable, net	192.7	158.7
Funds held	57.3	50.0
Senior unsecured fixed rate notes	128.0	140.5
Junior subordinated debentures	241.2	258.6
Operating lease liabilities	51.4	66.4
Liabilities held-for-sale	0.0	1,914.5
Total liabilities	7,205.6	8,801.5
Commitments and contingencies
Stockholders' equity:
Series A Preferred stock and additional paid-in capital - $1.00 par, 30,000,000 shares authorized; 6,000 and 6,000 shares issued at December 31, 2023 and December 31, 2022, respectively; liquidation preference $25,000	137.1	144.0
Common stock - $1.00 par, 2,000,000,000 and 500,000,000 shares authorized at December 31, 2023 and December 31, 2022, respectively; 1,056,638,730 and 46,379,297 shares issued at December 31, 2023 and December 31, 2022, respectively	1,056.6	46.4
Additional paid-in capital	51.1	1,395.4
Treasury shares (0 and 11,318,339 shares at December 31, 2023 and December 31, 2022, respectively)	0.0	(455.1)
Retained earnings	0.9	407.3
Accumulated other comprehensive gain (loss), net of taxes	51.8	(305.1)
Total stockholders' equity	1,297.5	1,232.9
Total liabilities and stockholders' equity	$ 8,503.1	$ 10,034.4