Shareholders' Equity - OCI Components (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pretax
Total other comprehensive income (loss)	$ (1,172)	$ 174	$ (2,325)	$ (230)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	272	(31)	527	61
Net of Tax
Arising during the period	(912)	144	(1,794)	(129)
Reclassification to net income	12	(1)	(4)	(40)
Total other comprehensive income (loss), net of tax	(900)	143	(1,798)	(169)
Net unrealized gains (losses) on securities
Pretax
Total other comprehensive income (loss)	(1,015)	172	(2,111)	(268)
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	239	(31)	482	69
Net of Tax
Arising during the period	(788)	142	(1,625)	(159)
Reclassification to net income	12	(1)	(4)	(40)
Total other comprehensive income (loss), net of tax	(776)	141	(1,629)	(199)
Net unrealized gains (losses) on securities arising during the period
Pretax
Arising during the period	(1,440)	336	(3,032)	(354)
Income Tax Benefit (Expense)
Arising during the period	328	(65)	675	87
Net of Tax
Arising during the period	(1,112)	271	(2,357)	(267)
Reclassification of net (gains) losses on securities included in net income
Pretax
Reclassification to net income	15	(1)	(5)	(51)
Income Tax Benefit (Expense)
Reclassification to net income	(3)	0	1	11
Net of Tax
Reclassification to net income	12	(1)	(4)	(40)
Impact of DAC, DSIC, unearned revenue, benefit reserves and reinsurance recoverables
Pretax
Arising during the period	410	(163)	926	137
Income Tax Benefit (Expense)
Arising during the period	(86)	34	(194)	(29)
Net of Tax
Arising during the period	324	(129)	732	108
Net unrealized gains (losses) on derivatives
Pretax
Arising during the period	(2)	0	(1)	0
Total other comprehensive income (loss)	(2)	0	(1)	0
Income Tax Benefit (Expense)
Arising during the period	0	0	0	0
Total other comprehensive income (loss)	0	0	0	0
Net of Tax
Arising during the period	(2)	0	(1)	0
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	(2)	0	(1)	0
Defined benefit plans
Pretax
Arising during the period			0	37
Total other comprehensive income (loss)			0	37
Income Tax Benefit (Expense)
Arising during the period			0	(8)
Total other comprehensive income (loss)			0	(8)
Net of Tax
Arising during the period	0	0	0	29
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	29
Foreign currency translation
Pretax
Total other comprehensive income (loss)	(155)	2	(213)	1
Income Tax Benefit (Expense)
Total other comprehensive income (loss)	33	0	45	0
Net of Tax
Arising during the period	(122)	2	(168)	1
Reclassification to net income	0	0	0	0
Total other comprehensive income (loss), net of tax	$ (122)	$ 2	$ (168)	$ 1