Shareholders' Equity - OCI Components (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022
Pretax
Total other comprehensive income (loss)	$ (471)	$ (671)		$ 246	$ (1,445)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	107	165		(49)	339
Net of Tax
Arising during the period	(359)	(518)		204	(1,102)
Reclassification to net income	(5)	12		(7)	(4)
Total other comprehensive income (loss), net of tax	(364)	(506)	[1]	197	(1,106)	[1]
Net unrealized gains (losses) on securities
Pretax
Total other comprehensive income (loss)	(439)	(1,385)		112	(2,947)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	101	318		(20)	660
Net of Tax
Arising during the period	(333)	(1,079)		99	(2,283)
Reclassification to net income	(5)	12		(7)	(4)
Total other comprehensive income (loss), net of tax	(338)	(1,067)		92	(2,287)
Net unrealized gains (losses) on securities arising during the period
Pretax
Arising during the period	(439)	(1,440)		127	(3,032)
Income Tax Benefit (Expense)
Arising during the period	101	328		(23)	675
Net of Tax
Arising during the period	(338)	(1,112)		104	(2,357)
Reclassification of net (gains) losses on securities included in net income
Pretax
Reclassification to net income	(6)	15		(9)	(5)
Income Tax Benefit (Expense)
Reclassification to net income	1	(3)		2	1
Net of Tax
Reclassification to net income	(5)	12		(7)	(4)
Impact of benefit reserves and reinsurance recoverables
Pretax
Arising during the period	6	40		(6)	90
Income Tax Benefit (Expense)
Arising during the period	(1)	(7)		1	(16)
Net of Tax
Arising during the period	5	33		(5)	74
Net unrealized gains (losses) on derivatives
Pretax
Arising during the period	0	(2)		3	(1)
Total other comprehensive income (loss)	0	(2)		3	(1)
Income Tax Benefit (Expense)
Arising during the period	0	0		(1)	0
Total other comprehensive income (loss)	0	0		(1)	0
Net of Tax
Arising during the period	0	(2)		2	(1)
Reclassification to net income	0	0		0	0
Total other comprehensive income (loss), net of tax	0	(2)		2	(1)
Effect of changes in discount rate assumptions on certain long-duration contracts
Pretax
Total other comprehensive income (loss)	75	417		(8)	877
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(16)	(89)		2	(187)
Net of Tax
Arising during the period	59	328		(6)	690
Reclassification to net income	0	0		0	0
Total other comprehensive income (loss), net of tax	59	328		(6)	690
Effect of changes in instrument-specific credit risk on MRBs
Pretax
Total other comprehensive income (loss)	(159)	454		45	839
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	33	(97)		(10)	(179)
Net of Tax
Arising during the period	(126)	357		35	660
Reclassification to net income	0	0		0	0
Total other comprehensive income (loss), net of tax	(126)	357		35	660
Foreign currency translation
Pretax
Total other comprehensive income (loss)	52	(155)		94	(213)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(11)	33		(20)	45
Net of Tax
Arising during the period	41	(122)		74	(168)
Reclassification to net income	0	0		0	0
Total other comprehensive income (loss), net of tax	$ 41	$ (122)		$ 74	$ (168)

[1] Certain prior period amounts have been restated. See Note 3 for more information.