Income Taxes (Reconciliation between the Company's federal income tax (expense) benefit at statutory rates and the recorded income tax (expense) benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax expense at statutory rates	$ (319)	$ (172)		$ (308)
Tax benefit from tax exempt income	30	41		51
Foreign taxes and credits	(5)	15		(3)
State income tax expense	(13)	(10)		(13)
Other tax expense	(6)	(6)		(5)
Income tax expense	$ (313)	$ (132)	[1]	$ (278)	[1]

[1] As of January 1, 2023, the Company adopted ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12) using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Consolidated Financial Statements for additional information.