Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Balance, Beginning of Period		$ (369)	$ (1,871)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		1,687	522
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		390	141
Other Comprehensive Income (Loss), Tax		436	125
Balance, End of Period		1,272	(1,333)
Accumulated Translation Adjustment [Member]
Balance, Beginning of Period		69	(116)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		50	116
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(11)	(33)
Balance, End of Period		108	(33)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Balance, Beginning of Period	[1]	(3,668)	(5,496)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	[1]	696	(1,652)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	389	140
Other Comprehensive Income (Loss), Tax	[1]	217	(349)
Balance, End of Period	[1]	(2,800)	(6,659)
Accumulated Defined Benefit Plans Adjustment [Member]
Balance, Beginning of Period		(29)	(27)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(1)	16
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		1	1
Other Comprehensive Income (Loss), Tax		0	(4)
Balance, End of Period		(29)	(14)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent
Balance, Beginning of Period		3	13
Other Comprehensive Income (Loss), before Reclassifications, before Tax		4	(8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(1)	2
Balance, End of Period		6	7
AOCI, Liability for Future Policy Benefit, Parent
Balance, Beginning of Period		3,256	3,755
Other Comprehensive Income (Loss), before Reclassifications, before Tax		938	2,050
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		207	439
Balance, End of Period		$ 3,987	$ 5,366

[1] Includes cash flow hedges of $(229) and $(218) as of September 30, 2024 and December 31, 2023, respectively, and $(351) and $(205) as of September 30, 2023 and December 31, 2022, respectively. See Note 11 – “Derivative Instruments” for additional information on cash flow hedges.