Discontinued Operations - Summarized Operating Results of the Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale and liquidation of subsidiaries			$ (159.9)	$ (39.3)
(Loss) income from discontinued operations	$ (200.3)	$ 8.2	(149.9)	(55.4)
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0.0	146.8	1.7	478.4
Life, accident and health earned premiums, net	0.0	28.6	55.7	86.8
Net investment income	0.0	46.7	92.4	147.1
Realized/unrealized gains (losses) on investments	0.0	0.7	5.1	(18.8)
Total revenue	0.0	222.8	154.9	693.5
Cost of revenue	0.0	139.9	0.8	457.5
Policy benefits, changes in reserves, and commissions	0.0	59.6	126.0	195.0
Selling, general and administrative	0.0	11.3	21.1	50.4
Depreciation and amortization	0.0	(2.0)	(11.0)	(5.3)
Income (loss) from operations	0.0	14.0	18.0	(4.1)
Interest expense	0.0	(1.9)	(0.5)	(9.8)
Loss on sale and liquidation of subsidiaries	(200.3)	0.0		(39.3)
Income from equity investees	0.0	0.0	0.0	0.5
Other loss	0.0	(3.8)	(3.1)	(2.0)
Pre-tax (loss) income from discontinued operations	(200.3)	8.3	(145.5)	(54.7)
Income tax expense	0.0	(0.1)	(4.4)	(0.7)
(Loss) income from discontinued operations	$ (200.3)	$ 8.2	$ (149.9)	$ (55.4)