Reserves for Insurance Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross reserves for insurance losses and loss adjustment expenses, beginning balance			$ 119	$ 122
Less: Reinsurance recoverable			72	81
Net reserves for insurance losses and loss adjustment expenses	$ 80	$ 50	80	50	$ 47	$ 41
Current year			218	151
Prior years			4	(4)
Total net insurance losses and loss adjustment expenses incurred	134	89	222	147
Current year			(154)	(114)
Prior years			(35)	(24)
Total net insurance losses and loss adjustment expenses paid or payable			(189)	(138)
Plus: Reinsurance recoverable	72	81	72	81
Gross reserves for insurance losses and loss adjustment expenses, ending balance	$ 152	$ 131	$ 152	$ 131