General (Effects of Adoption ASU 2018-12, Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)	$ 258	$ (42)	[1],[2]	$ 838	$ 443	[1],[3]
Deferred income tax expense (benefit)				12	(71)	[3]
Insurance reserves				$ 1,184	1,999	[3]
Prior to Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)		128			646
Deferred income tax expense (benefit)					(18)
Insurance reserves					1,743
Effect of Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)		$ (170)			(203)
Deferred income tax expense (benefit)					(53)
Insurance reserves					$ 256

[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 Condensed Consolidated Financial Statements for additional information.

[2] As of January 1, 2023, the Company adopted 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 Condensed Consolidated Financial Statements for additional information.

[3] As of January 1, 2023, the Company adopted 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 Condensed Consolidated Financial Statements for additional information.