Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Balance, Beginning of Period		$ (1,871)	$ (500)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		424	(490)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		89	37
Other Comprehensive Income (Loss), Tax		103	(95)
Balance, End of Period		(1,461)	(858)
Accumulated Translation Adjustment [Member]
Balance, Beginning of Period		(116)	(13)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		28	27
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax			0
Other Comprehensive Income (Loss), Tax		(6)	(6)
Balance, End of Period		(94)	8
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]	1,316	(4,886)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	88	36
Other Comprehensive Income (Loss), Tax	[1]	301	(1,061)
Balance, End of Period	[1]	(4,393)	(10)
Accumulated Defined Benefit Plans Adjustment [Member]
Balance, Beginning of Period		(27)	(50)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		5	(1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		1	1
Other Comprehensive Income (Loss), Tax		(1)	0
Balance, End of Period		(22)	(50)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent
Balance, Beginning of Period		13	(7)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		2	(5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(1)	1
Balance, End of Period		14	(11)
AOCI, Liability for Future Policy Benefit, Parent
Balance, Beginning of Period		3,755	(4,209)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(927)	4,375
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(206)	961
Balance, End of Period		$ 3,034	$ (795)

[1] Includes cash flow hedges of $(198) and $(205) as of March 31, 2023 and December 31, 2022, respectively, and $(81) and $(22) as of March 31, 2022 and December 31, 2021, respectively. See Note 12 – “Derivative Instruments” for additional information on cash flow hedges.