Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Premiums and other revenue:
Earned premiums	$ 455.0	$ 487.5	$ 1,389.9	$ 1,423.9
Net investment income	34.0	46.1	100.9	143.2
Net investment and other gains (losses):
Net realized investment and other gains (losses)	(42.3)	0.6	(119.2)	3.3
Change in fair value recognized	(1.1)	(5.1)	2.5	30.7
Change in allowance for credit losses on fixed maturity securities	(1.3)	(0.8)	(2.9)	(1.5)
Total net investment and other gains (losses)	(44.7)	(5.3)	(119.6)	32.5
Total revenue	444.3	528.3	1,371.2	1,599.6
Expenses:
Losses and loss adjustment expenses	298.8	311.7	858.4	890.9
Underwriting, acquisition and insurance expenses	161.0	177.1	494.9	530.8
Non-operating expenses	11.0	8.2	33.9	20.9
Interest expense	6.8	5.5	18.7	16.3
Fee and other (income) expense, net	0.1	(1.1)	(1.8)	(1.8)
Foreign currency exchange (gains) losses	(9.1)	(1.3)	(16.5)	4.4
Impairment of goodwill and intangibles	28.5	0.0	28.5	0.0
Total expenses	497.1	500.1	1,416.1	1,461.5
Income (loss) before income taxes	(52.8)	28.2	(44.9)	138.1
Income tax provision (benefit)	(4.0)	5.8	21.1	16.1
Net income (loss)	(48.8)	22.4	(66.0)	122.0
Dividends on preferred shares	2.6	2.6	7.9	7.9
Net income (loss) attributable to common shareholders	(51.4)	19.8	(73.9)	114.1
Net Loss attributable to common shareholders, basic	$ (51.4)	$ 19.8	$ (73.9)	$ 114.1
Net income (loss) attributable to common shareholders per common share:
Basic (in dollars per share)	$ (1.47)	$ 0.57	$ (2.11)	$ 3.28
Diluted (in dollars per share)	(1.47)	0.56	(2.11)	3.26
Dividend declared per common share (in dollars per share)	$ 0.31	$ 0.31	$ 0.93	$ 0.93
Weighted average common shares:
Basic (in shares)	35,014,182	34,852,274	34,955,787	34,794,078
Diluted (in shares)	35,014,182	35,034,250	34,955,787	35,059,966