Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Balance, Beginning of Period		$ (369)	$ (1,871)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		155	490
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		304	99
Other Comprehensive Income (Loss), Tax		110	116
Balance, End of Period		(20)	(1,398)
Accumulated Translation Adjustment [Member]
Balance, Beginning of Period		69	(116)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		39	169
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(21)	(27)
Balance, End of Period		87	26
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]	(1,625)	687
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	304	99
Other Comprehensive Income (Loss), Tax	[1]	(294)	169
Balance, End of Period	[1]	(4,695)	(4,879)
Accumulated Defined Benefit Plans Adjustment [Member]
Balance, Beginning of Period		(29)	(27)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		0	11
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		0	(2)
Balance, End of Period		(29)	(18)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent
Balance, Beginning of Period		3	13
Other Comprehensive Income (Loss), before Reclassifications, before Tax		4	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		(1)	0
Balance, End of Period		6	13
AOCI, Liability for Future Policy Benefit, Parent
Balance, Beginning of Period		3,256	3,755
Other Comprehensive Income (Loss), before Reclassifications, before Tax		1,737	(377)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
Other Comprehensive Income (Loss), Tax		382	(82)
Balance, End of Period		$ 4,611	$ 3,460

[1] Includes cash flow hedges of $(413) and $(218) as of June 30, 2024 and December 31, 2023, respectively, and $(228) and $(205) as of June 30, 2023 and December 31, 2022, respectively. See Note 11 – “Derivative Instruments” for additional information on cash flow hedges.