Liability For Future Policy Benefits (Future Policy Benefits) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	[1]	Jun. 30, 2022
Insurance [Abstract]
Benefit reserves, EOP, post-flooring	$ 188,974			$ 187,139
Deferred Profit Liability EOP, post-flooring	14,431			13,563
Additional insurance reserves, including amounts in AOCI, EOP, post-flooring	13,660			12,679
Subtotal of amounts disclosed above	217,065			213,381
Other Future Policy Benefits reserves	51,584			52,709
Future policy benefits	$ 268,649	$ 261,773		$ 266,090

[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.