Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Balance, Beginning of Period		$ (1,871)	$ (500)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		490	(1,317)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		99	109
Other Comprehensive Income (Loss), Tax		116	(224)
Balance, End of Period		(1,398)	(1,484)
Accumulated Translation Adjustment [Member]
Balance, Beginning of Period		(116)	(13)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		169	47
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(27)	(31)
Balance, End of Period		26	3
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Balance, Beginning of Period	[1]	(5,496)	3,779
Other Comprehensive Income (Loss), before Reclassifications, before Tax	[1]	687	(9,458)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	99	107
Other Comprehensive Income (Loss), Tax	[1]	169	(2,023)
Balance, End of Period	[1]	(4,879)	(3,549)
Accumulated Defined Benefit Plans Adjustment [Member]
Balance, Beginning of Period		(27)	(50)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		11	(3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	2
Other Comprehensive Income (Loss), Tax		(2)	0
Balance, End of Period		(18)	(51)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent
Balance, Beginning of Period		13	(7)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		0	(3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		0	1
Balance, End of Period		13	(9)
AOCI, Liability for Future Policy Benefit, Parent
Balance, Beginning of Period		3,755	(4,209)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(377)	8,100
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(82)	1,769
Balance, End of Period		$ 3,460	$ 2,122

[1] Includes cash flow hedges of $(228) and $(205) as of June 30, 2023 and December 31, 2022, respectively, and $(206) and $(22) as of June 30, 2022 and December 31, 2021, respectively. See Note 12 – “Derivative Instruments” for additional information on cash flow hedges.