Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Investments:
Fixed maturities available-for-sale, at fair value (amortized cost: 2022 - $4,131.5, 2021 - $4,203.2; allowance for expected credit losses: 2022 - $3.3, 2021 - $2.5)	$ 3,730.3	$ 4,223.3
Commercial mortgage loans (cost: 2022 - $158.8; allowance for expected credit losses: 2022 - $0.2)	158.6	0.0
Equity securities, at fair value (cost: 2022 - $55.3; 2021 - $70.3)	43.9	56.3
Other investments (cost: 2022 - $401.6; 2021 - $387.0)	401.6	387.2
Short-term investments, at fair value (amortized cost: 2022 - $570.2; 2021 - $655.4)	570.7	655.8
Total investments	4,905.1	5,322.6
Cash	99.4	146.1
Accrued investment income	23.1	20.9
Premiums receivable	656.5	648.6
Reinsurance recoverables	3,015.8	2,966.4
Goodwill	136.1	147.3
Intangible assets, net of accumulated amortization	0.0	17.3
Current income taxes receivable, net	2.8	7.3
Deferred tax asset, net	151.8	73.6
Deferred acquisition costs, net	183.4	168.0
Ceded unearned premiums	450.8	506.7
Operating lease right-of-use assets	60.3	81.4
Other assets	173.6	211.6
Total assets	9,858.7	10,317.8
Liabilities and Shareholders' Equity
Reserves for losses and loss adjustment expenses	5,731.4	5,595.0
Unearned premiums	1,404.9	1,466.8
Accrued underwriting expenses and other liabilities	120.3	166.6
Ceded reinsurance payable, net	503.1	724.4
Funds held	253.7	76.6
Senior unsecured fixed rate notes	140.5	140.3
Other indebtedness	52.5	57.0
Junior subordinated debentures	258.5	258.2
Operating lease liabilities	68.9	97.7
Total liabilities	8,533.8	8,582.6
Commitments and contingencies (Note 14)
Shareholders' equity:
Preferred shares and additional paid-in capital - $1.00 par, 30,000,000 shares authorized; 6,000 shares issued at September 30, 2022 and December 31, 2021, respectively; liquidation preference $25,000	144.0	144.0
Common shares - $1.00 par, 500,000,000 shares authorized; 46,339,696 and 46,192,867 shares issued at September 30, 2022 and December 31, 2021, respectively	46.3	46.2
Additional paid-in capital	1,392.6	1,386.4
Treasury shares (11,318,339 shares at September 30, 2022 and December 31, 2021, respectively)	(455.1)	(455.1)
Retained earnings	530.0	636.4
Accumulated other comprehensive loss, net of taxes	(332.9)	(22.7)
Total shareholders' equity	1,324.9	1,735.2
Total liabilities and shareholders' equity	$ 9,858.7	$ 10,317.8