Equity (Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 21,324
Income tax benefit (expense)	12,063	$ 2,314	$ (1,252)
Ending balance	(19,827)	21,324
Foreign  Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,150)	52	(536)
Change in OCI before reclassification	(1,198)	(1,058)	455
Amounts reclassified from AOCI	15	(65)	57
Income tax benefit (expense)	(49)	(79)	76
Ending balance	(2,382)	(1,150)	52
Net Unrealized Investment Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	24,987	34,065	28,112
Change in OCI before reclassification	(53,253)	(9,226)	8,112
Amounts reclassified from AOCI	586	(2,486)	(883)
Income tax benefit (expense)	12,262	2,634	(1,276)
Ending balance	(15,418)	24,987	34,065
Pension and Postretirement Unrecognized Net Periodic Benefit (Cost)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,513)	(3,379)	(3,537)
Change in OCI before reclassification	479	843	(70)
Amounts reclassified from AOCI	157	264	280
Income tax benefit (expense)	(150)	(241)	(52)
Ending balance	(2,027)	(2,513)	(3,379)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	21,324	30,738	24,039
Change in OCI before reclassification	(53,972)	(9,441)	8,497
Amounts reclassified from AOCI	758	(2,287)	(546)
Income tax benefit (expense)	12,063	2,314	(1,252)
Ending balance	(19,827)	21,324	30,738
Cash flow hedges | Net Unrealized Investment Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	1,019	(168)
Ending balance	2,616	1,019	(168)
Fair value hedges | Net Unrealized Investment Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(35)	0
Ending balance	$ (54)	$ (35)	$ 0