Shareholders' Equity - OCI Components (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pretax
Total other comprehensive income (loss)	$ 717	$ (774)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(156)	174
Net of Tax
Arising during the period	563	(584)
Reclassification to net income	(2)	(16)
Total other comprehensive income (loss), net of tax	561	(600)	[1]
Net unrealized gains (losses) on securities
Pretax
Total other comprehensive income (loss)	551	(1,562)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(121)	342
Net of Tax
Arising during the period	432	(1,204)
Reclassification to net income	(2)	(16)
Total other comprehensive income (loss), net of tax	430	(1,220)
Net unrealized gains (losses) on securities arising during the period
Pretax
Arising during the period	566	(1,592)
Income Tax Benefit (Expense)
Arising during the period	(124)	347
Net of Tax
Arising during the period	442	(1,245)
Reclassification of net (gains) losses on securities included in net income
Pretax
Reclassification to net income	(3)	(20)
Income Tax Benefit (Expense)
Reclassification to net income	1	4
Net of Tax
Reclassification to net income	(2)	(16)
Impact of benefit reserves and reinsurance recoverables
Pretax
Arising during the period	(12)	50
Income Tax Benefit (Expense)
Arising during the period	2	(9)
Net of Tax
Arising during the period	(10)	41
Net unrealized gains (losses) on derivatives
Pretax
Arising during the period	3	1
Total other comprehensive income (loss)	3	1
Income Tax Benefit (Expense)
Arising during the period	(1)	0
Total other comprehensive income (loss)	(1)	0
Net of Tax
Arising during the period	2	1
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	2	1
Effect of changes in discount rate assumptions on certain long-duration contracts
Pretax
Total other comprehensive income (loss)	(83)	460
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	18	(98)
Net of Tax
Arising during the period	(65)	362
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	(65)	362
Effect of changes in instrument-specific credit risk on MRBs
Pretax
Total other comprehensive income (loss)	204	385
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(43)	(82)
Net of Tax
Arising during the period	161	303
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	161	303
Foreign currency translation
Pretax
Total other comprehensive income (loss)	42	(58)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	(9)	12
Net of Tax
Arising during the period	33	(46)
Reclassification to net income	0	0
Total other comprehensive income (loss), net of tax	$ 33	$ (46)

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