Shareholders' Equity Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Pretax
Net		$ 174	$ 883	$ (230)	$ 170
Income Tax Benefit (Expense)
Income Tax Benefit (Expense)		(31)	(194)	61	(38)
Net of Tax
Total other comprehensive income (loss), net of tax		143	689	(169)	132
Net Unrealized Gains (Losses) on Securities
Pretax
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	[1]	(1)	(4)	(51)	4
Net		172	891	(268)	212
Income Tax Benefit (Expense)
Reclassification to net income	[1]		1	11	(1)
Income Tax Benefit (Expense)		(31)	(194)	(69)	39
Net of Tax
Arising during the period		142	700	(159)	170
Reclassification to net income	[1]	(1)	(3)	(40)	3
Total other comprehensive income (loss), net of tax		141	697	(199)	173
Net unrealized gains (losses) on securities, excluding insurance related impact
Pretax
Arising during the period	[2]	336	1,532	(354)	337
Income Tax Benefit (Expense)
Arising during the period	[2]	(65)	(329)	87	(65)
Net of Tax
Arising during the period	[2]	271	1,203	(267)	272
Impact of DAC, DSIC, unearned revenue, benefit reserves and reinsurance recoverables
Pretax
Arising during the period		(163)	(637)	137	(129)
Income Tax Benefit (Expense)
Arising during the period		34	134	(29)	27
Net of Tax
Arising during the period		(129)	(503)	108	(102)
Defined Benefit Plans
Pretax
Net				37
Income Tax Benefit (Expense)
Income Tax Benefit (Expense)				(8)
Net of Tax
Arising during the period				29
Total other comprehensive income (loss), net of tax		0	0	29	0
Foreign Currency Translation
Pretax
Net		2	(8)	1	(42)
Income Tax Benefit (Expense)
Income Tax Benefit (Expense)					(1)
Net of Tax
Arising during the period		2	(8)	1	(41)
Total other comprehensive income (loss), net of tax		$ 2	$ (8)	$ 1	$ (41)

[1] Reclassification amounts are recorded in net investment income.

[2] Includes impairments on Available-for-Sale securities related to factors other than credit that were recognized in OCI during the period.