Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		$ (369)	$ (1,871)	$ (500)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		978	1,566	(1,871)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		684	(241)	(229)
Other Comprehensive Income (Loss), Tax		444	305	(271)
Balance, end of year		849	(369)	(1,871)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		69	(115)	(13)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(56)	206	(67)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	0	0
Other Comprehensive Income (Loss), Tax		32	(22)	35
Balance, end of year		(19)	69	(115)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year	[1]	(3,668)	(5,497)	3,779
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	[1]	(1,718)	2,037	(12,045)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1]	684	241	227
Other Comprehensive Income (Loss), Tax	[1]	176	449	(2,542)
Balance, end of year	[1]	(4,526)	(3,668)	(5,497)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		(29)	(27)	(50)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		11	(4)	28
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	0	2
Other Comprehensive Income (Loss), Tax		2	(2)	7
Balance, end of year		(20)	(29)	(27)
AOCI, Liability for Future Policy Benefit, Parent
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		3,256	3,755	(4,209)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		2,742	(660)	10,188
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	0	0
Other Comprehensive Income (Loss), Tax		(586)	161	(2,224)
Balance, end of year		5,412	3,256	3,755
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		3	13	(7)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(1)	(13)	25
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	0	0
Other Comprehensive Income (Loss), Tax		0	(3)	5
Balance, end of year		$ 2	$ 3	$ 13

[1] Includes cash flow hedges of $(495), $(218) and $(205) as of December 31, 2024, 2023 and 2022, respectively. See Note 12 for additional information on cash flow hedges.