Equity (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	[1]	$ (6,504)
Income tax benefit (expense)		137	$ 90
Ending balance	[1]	(7,661)
Foreign  Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		(2,686)	(2,274)
Change in OCI before reclassifications		(481)	12
Amounts reclassified from AOCI		(13)	0
Income tax benefit (expense)		(36)	(38)
Ending balance		(3,216)	(2,300)
Total net unrealized investment gains (losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		(11,213)	(16,194)
Change in OCI before reclassifications		(4,602)	8,243
Amounts reclassified from AOCI		(172)	136
Income tax benefit (expense)		1,131	(1,988)
Ending balance		(14,856)	(9,803)
Interest rate remeasurement of Liability for Future Policy Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		8,547	15,242
Change in OCI before reclassifications		4,213	(8,705)
Amounts reclassified from AOCI		0	0
Income tax benefit (expense)		(1,006)	2,160
Ending balance		11,754	8,697
Gains (Losses) from Changes in Non-performance Risk on Market Risk Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		900	1,448
Change in OCI before reclassifications		(252)	186
Amounts reclassified from AOCI		0	0
Income tax benefit (expense)		53	(39)
Ending balance		701	1,595
Pension and Postretirement Unrecognized Net Periodic Benefit (Cost)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		(2,052)	(2,028)
Change in OCI before reclassifications		6	1
Amounts reclassified from AOCI		7	18
Income tax benefit (expense)		(5)	(5)
Ending balance		(2,044)	(2,014)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		(6,504)	(3,806)
Change in OCI before reclassifications		(1,116)	(263)
Amounts reclassified from AOCI		(178)	154
Income tax benefit (expense)		137	90
Ending balance		(7,661)	(3,825)
Cash Flow Hedging | Total net unrealized investment gains (losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		869	2,616
Ending balance		1,199	2,344
Fair value hedges—Currency | Total net unrealized investment gains (losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance		(60)	(54)
Ending balance		$ (51)	$ (74)

[1] See Note 20 for additional information regarding related party transactions.