CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue
Net earned premium	$ 50.6	$ 21.5	$ 109.2	$ 51.6
Ceding commission income	16.9	12.3	46.4	31.9
Net investment income	2.6	0.6	4.7	1.0
Commission and other income	3.9	1.3	8.0	2.9
Total revenue	74.0	35.7	168.3	87.4
Expense
Loss and loss adjustment expense, net	53.3	17.5	105.8	47.0
Other insurance expense	12.1	6.3	30.9	16.3
Sales and marketing	35.8	42.2	111.1	104.4
Technology development	21.4	14.3	56.1	35.4
General and administrative	40.5	19.6	91.1	49.5
Total expense	163.1	99.9	395.0	252.6
Loss before income taxes	(89.1)	(64.2)	(226.7)	(165.2)
Income tax expense	2.3	2.2	7.4	5.8
Net loss	(91.4)	(66.4)	(234.1)	(171.0)
Other comprehensive loss, net of tax
Unrealized loss on investments in fixed maturities	(5.0)	(0.8)	(23.8)	(1.2)
Foreign currency translation adjustment	(1.5)	0.0	(8.1)	(0.5)
Comprehensive loss	$ (97.9)	$ (67.2)	$ (266.0)	$ (172.7)
Per share data:
Net loss per share attributable to common stockholders—basic (usd per share)	$ (1.37)	$ (1.08)	$ (3.69)	$ (2.80)
Net loss per share attributable to common stockholders—diluted (usd per share)	$ (1.37)	$ (1.08)	$ (3.69)	$ (2.80)
Weighted average common shares outstanding—basic (in shares)	66,877,100	61,580,145	63,482,945	61,086,238
Weighted average common shares outstanding—diluted (in shares)	66,877,100	61,580,145	63,482,945	61,086,238