Summary of Significant Accounting Policies - Adjusted Cash Flows to Apply Adopted Guidance (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ 1,691	$ 3,079	$ 1,604	$ 7,639
Noncash revenues, expenses, gains and losses included in income (loss):
Unrealized (gains) losses in earnings - net			531	(1,332)
Change in the fair value of market risk benefits in earnings, net			(363)	(541)
Depreciation and other amortization			2,274	2,190
Changes in operating assets and liabilities:
Insurance reserves			3,573	378
Premiums and other receivables and payables - net			(940)	(7,666)
Reinsurance assets, net			(2,234)	831
Capitalization of deferred policy acquisition costs			(3,024)	(2,577)
Current and deferred income taxes - net			(339)	1,733
Other, net			(744)	(888)
Total adjustments			(493)	(7,042)
Net cash provided by operating activities			1,111	598
Cash flows from financing activities:
Policyholder contract deposits			15,920	12,491
Policyholder contract withdrawals			(12,801)	(9,467)
Net cash used in financing activities			$ (115)	(2,759)
As Previously Reported
Cash flows from operating activities:
Net income (loss)		3,392		8,048
Noncash revenues, expenses, gains and losses included in income (loss):
Unrealized (gains) losses in earnings - net				(3,238)
Change in the fair value of market risk benefits in earnings, net				0
Depreciation and other amortization				2,698
Changes in operating assets and liabilities:
Insurance reserves				1,402
Premiums and other receivables and payables - net				(7,646)
Reinsurance assets, net				20
Capitalization of deferred policy acquisition costs				(2,543)
Current and deferred income taxes - net				1,842
Other, net				(783)
Total adjustments				(7,418)
Net cash provided by operating activities				631
Cash flows from financing activities:
Policyholder contract deposits				12,457
Net cash used in financing activities				(2,793)
Effect of Change
Cash flows from operating activities:
Net income (loss)		$ (313)		(409)
Noncash revenues, expenses, gains and losses included in income (loss):
Unrealized (gains) losses in earnings - net				1,906
Change in the fair value of market risk benefits in earnings, net				(541)
Depreciation and other amortization				(508)
Changes in operating assets and liabilities:
Insurance reserves				(1,024)
Premiums and other receivables and payables - net				(20)
Reinsurance assets, net				811
Capitalization of deferred policy acquisition costs				(34)
Current and deferred income taxes - net				(109)
Other, net				(105)
Total adjustments				376
Net cash provided by operating activities				(33)
Cash flows from financing activities:
Policyholder contract deposits				34
Net cash used in financing activities				$ 34