Summary of Significant Accounting Policies - Adjusted Cash Flows to Apply Adopted Guidance (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ 2,747	$ 3,087	$ 4,351	$ 10,726
Noncash revenues, expenses, gains and losses included in income (loss):
Unrealized (gains) losses in earnings - net			795	(171)
Change in the fair value of market risk benefits in earnings, net			(1,056)	(1,032)
Depreciation and other amortization			3,245	3,321
Changes in operating assets and liabilities:
Insurance reserves			2,908	434
Premiums and other receivables and payables - net			(1,606)	(8,953)
Reinsurance assets, net			(1,001)	1,317
Capitalization of deferred policy acquisition costs			(4,260)	(3,756)
Current and deferred income taxes - net			380	2,327
Other, net			67	(1,091)
Total adjustments			270	(6,760)
Net cash provided by operating activities			4,621	3,967
Cash flows from financing activities:
Policyholder contract deposits			24,550	19,831
Policyholder contract withdrawals			(20,409)	(14,736)
Net cash used in financing activities			$ (239)	(1,519)
As Previously Reported
Cash flows from operating activities:
Net income (loss)		3,041		11,089
Noncash revenues, expenses, gains and losses included in income (loss):
Unrealized (gains) losses in earnings - net				(2,738)
Change in the fair value of market risk benefits in earnings, net				0
Depreciation and other amortization				3,918
Changes in operating assets and liabilities:
Insurance reserves				1,720
Premiums and other receivables and payables - net				(8,914)
Reinsurance assets, net				200
Capitalization of deferred policy acquisition costs				(3,704)
Current and deferred income taxes - net				2,424
Other, net				(822)
Total adjustments				(7,072)
Net cash provided by operating activities				4,018
Cash flows from financing activities:
Policyholder contract deposits				19,779
Net cash used in financing activities				(1,571)
Effect of Change
Cash flows from operating activities:
Net income (loss)		$ 46		(363)
Noncash revenues, expenses, gains and losses included in income (loss):
Unrealized (gains) losses in earnings - net				2,567
Change in the fair value of market risk benefits in earnings, net				(1,032)
Depreciation and other amortization				(597)
Changes in operating assets and liabilities:
Insurance reserves				(1,286)
Premiums and other receivables and payables - net				(39)
Reinsurance assets, net				1,117
Capitalization of deferred policy acquisition costs				(52)
Current and deferred income taxes - net				(97)
Other, net				(269)
Total adjustments				312
Net cash provided by operating activities				(51)
Cash flows from financing activities:
Policyholder contract deposits				52
Net cash used in financing activities				$ 52