Shareholders' Equity - Changes in AOCI by Component (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 5,064
Other comprehensive income (loss) before reclassifications	92	$ (384)
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(2)	3
Interest expense	21	20
Income (loss) before income taxes	120	93
Tax (provision) benefit	(23)	(18)
Other comprehensive income (loss)	95	(378)
Ending balance	5,220
Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(2)	(6)
Fair value gains (losses) on FG VIEs	(1)	(1)
Income (loss) before income taxes	(3)	(7)
Tax (provision) benefit	0	1
Total amount reclassified from AOCI, net of tax	(3)	(6)
Total AOCI
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(515)	300
Less: Amounts reclassified from AOCI to:
Ending balance	(420)	(78)
No Credit Impairment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(343)	375
Other comprehensive income (loss) before reclassifications	91	(339)
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	89	(338)
Ending balance	(254)	37
No Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	3	(1)
Fair value gains (losses) on FG VIEs	0	0
Income (loss) before income taxes	3	(1)
Tax (provision) benefit	(1)	0
Total amount reclassified from AOCI, net of tax	2	(1)
Credit Impairment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(110)	(24)
Other comprehensive income (loss) before reclassifications	1	(43)
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	5	(39)
Ending balance	(105)	(63)
Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(5)	(5)
Fair value gains (losses) on FG VIEs	0	0
Income (loss) before income taxes	(5)	(5)
Tax (provision) benefit	1	1
Total amount reclassified from AOCI, net of tax	(4)	(4)
ISCR on FG VIEs’ Liabilities with Recourse
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(23)	(21)
Other comprehensive income (loss) before reclassifications	(2)	(1)
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	(1)	0
Ending balance	(24)	(21)
ISCR on FG VIEs’ Liabilities with Recourse | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	0	0
Fair value gains (losses) on FG VIEs	(1)	(1)
Income (loss) before income taxes	(1)	(1)
Tax (provision) benefit	0	0
Total amount reclassified from AOCI, net of tax	(1)	(1)
Cumulative Translation Adjustment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(45)	(36)
Other comprehensive income (loss) before reclassifications	2	(1)
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	2	(1)
Ending balance	(43)	(37)
Cumulative Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	0	0
Fair value gains (losses) on FG VIEs	0	0
Income (loss) before income taxes	0	0
Tax (provision) benefit	0	0
Total amount reclassified from AOCI, net of tax	0	0
Cash Flow  Hedge
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	6	6
Other comprehensive income (loss) before reclassifications	0	0
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	0	0
Ending balance	6	6
Cash Flow  Hedge | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	0	0
Fair value gains (losses) on FG VIEs	0	0
Income (loss) before income taxes	0	0
Tax (provision) benefit	0	0
Total amount reclassified from AOCI, net of tax	$ 0	$ 0