Insurance Contracts - Effect of Reinsurance on Premiums Written and Earned (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Written	$ 16	$ (1)	$ 83	$ (6)
Assumed Reinsurance Premiums Written	0	0	0	0
Ceded Reinsurance Premiums Written	17	14	63	29
Premiums written, net of reinsurance	0	15	(21)	36
Direct Premiums Earned	30	15	83	46
Assumed Reinsurance Premiums Earned	0	0	0	0
Ceded Reinsurance Premiums Earned	$ 19	$ 4	$ 43	$ 10