Schedule II - Condensed Financial Information of Registrant (Parent Company Only) - Condensed Statement of Total Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Other income	$ 11	$ 10	$ 1
Net investment gains (losses), including impairments	22	(31)	(7)
Total revenues and other income	269	505	282
General and Administrative Expense	156	141	111
Expenses:
Operating Expenses	155	139	110
Income tax expense (benefit)	(7)	(2)	(18)
Net income (loss) attributable to common stockholders	4	522	(17)
Other comprehensive income, after tax:
Net income	5	522	(16)
Unrealized gains (losses) on securities, net of deferred income taxes of $0	51	(225)	(12)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	40	(85)	(8)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, after Tax	0	0	(1)
Total other comprehensive income (loss), net of income tax	93	(310)	(21)
Total comprehensive income attributable to common stockholders	96	212	(38)
Derivative, Gain (Loss) on Derivative, Net	(1)	129	22
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax	2	(6)	(2)
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	0	0	0
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, Tax	0	0	0
Revenues:
Investment income	9	10	10
Other income	0	0	0
Net investment gains (losses), including impairments	0	14	5
Total revenues and other income	9	(2)	5
General and Administrative Expense	22	17	19
Expenses:
Operating Expenses	22	17	19
Pretax income (loss)	(13)	(20)	(14)
Income tax expense (benefit)	1	0	(2)
Income (loss) before equity pick-up of net income (loss) of subsidiaries	11	19	16
Equity in undistributed net income (loss) of subsidiaries	15	542	(1)
Net income (loss) attributable to common stockholders	4	522	(17)
Other comprehensive income, after tax:
Net income	4	522	(17)
Unrealized gains (losses) on securities, net of deferred income taxes of $0	51	(225)	(12)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	40	(85)	(8)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, after Tax	0	0	(1)
Changes to postretirement benefit, net of tax	2	(1)	(1)
Total other comprehensive income (loss), net of income tax	93	(310)	(21)
Total comprehensive income attributable to common stockholders	96	212	(38)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect	0	0	$ 0
Derivative, Gain (Loss) on Derivative, Net	$ 0	$ 1