Shareholders' Equity - Changes in AOCI by Component (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 6,292
Other comprehensive income (loss) before reclassifications	$ (294)	$ (70)	(993)	$ (123)
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(14)	3	(39)	4
Interest expense	20	23	60	67
Income (loss) before income taxes	(22)	5	49	145
Tax (provision) benefit	27	15	6	(8)
Other comprehensive income (loss)	(282)	(71)	(952)	(124)
Ending balance	4,929		4,929
Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(14)	2	(48)	3
Fair value gains (losses) on FG VIEs	0	(1)	(2)	(3)
Interest expense		1		1
Income (loss) before income taxes	(14)	2	(50)	1
Tax (provision) benefit	2	(1)	9	0
Total amount reclassified from AOCI, net of tax	(12)	1	(41)	1
Total AOCI
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(370)	445	300	498
Less: Amounts reclassified from AOCI to:
Ending balance	(652)	374	(652)	374
No Credit Impairment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(205)	509	375	577
Other comprehensive income (loss) before reclassifications	(286)	(69)	(886)	(134)
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	(277)	(66)	(857)	(134)
Ending balance	(482)	443	(482)	443
No Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(11)	(3)	(35)	1
Fair value gains (losses) on FG VIEs	0	0	0	0
Interest expense		0		0
Income (loss) before income taxes	(11)	(3)	(35)	1
Tax (provision) benefit	2	0	6	(1)
Total amount reclassified from AOCI, net of tax	(9)	(3)	(29)	0
Credit Impairment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(107)	(12)	(24)	(30)
Other comprehensive income (loss) before reclassifications	(1)	(2)	(92)	14
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	2	(6)	(81)	12
Ending balance	(105)	(18)	(105)	(18)
Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(3)	5	(13)	2
Fair value gains (losses) on FG VIEs	0	0	0	0
Interest expense		0		0
Income (loss) before income taxes	(3)	5	(13)	2
Tax (provision) benefit	0	(1)	2	0
Total amount reclassified from AOCI, net of tax	(3)	4	(11)	2
ISCR on FG VIEs’ Liabilities with Recourse
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(19)	(23)	(21)	(20)
Other comprehensive income (loss) before reclassifications	(3)	1	(2)	(3)
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	(3)	2	(1)	(1)
Ending balance	(22)	(21)	(22)	(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	0	0
Fair value gains (losses) on FG VIEs	0	(1)	(2)	(3)
Interest expense		0		0
Income (loss) before income taxes	0	(1)	(2)	(3)
Tax (provision) benefit	0	0	1	1
Total amount reclassified from AOCI, net of tax	0	(1)	(1)	(2)
Cumulative Translation Adjustment
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(45)	(36)	(36)	(36)
Other comprehensive income (loss) before reclassifications	(4)	0	(13)	0
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	(4)	0	(13)	0
Ending balance	(49)	(36)	(49)	(36)
Cumulative Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Less: Amounts reclassified from AOCI to:
Net realized investment gains (losses)	0	0	0	0
Fair value gains (losses) on FG VIEs	0	0	0	0
Interest expense		0		0
Income (loss) before income taxes	0	0	0	0
Tax (provision) benefit	0	0	0	0
Total amount reclassified from AOCI, net of tax	0	0	0	0
Cash Flow  Hedge
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	6	7	6	7
Other comprehensive income (loss) before reclassifications	0	0	0	0
Less: Amounts reclassified from AOCI to:
Other comprehensive income (loss)	0	(1)	0	(1)
Ending balance	6	6	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	0	0
Fair value gains (losses) on FG VIEs	0	0	0	0
Interest expense		1		1
Income (loss) before income taxes	0	1	0	1
Tax (provision) benefit	0	0	0	0
Total amount reclassified from AOCI, net of tax	$ 0	$ 1	$ 0	$ 1