Derivatives (Credit Risk on Freestanding Derivatives) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Credit Derivatives [Line Items]
Estimated fair value of derivatives in a net liability position (1)	$ 1,746	$ 2,049
Derivative, Collateral, Right to Reclaim Cash	103	125
Exchange Traded [Member]
Credit Derivatives [Line Items]
Derivative, Collateral, Right to Reclaim Securities	131	184
Fixed maturity securities AFS
Credit Derivatives [Line Items]
Estimated fair value of collateral provided:	1,923	2,267
Derivatives Subject to Credit- Contingent Provisions
Credit Derivatives [Line Items]
Estimated fair value of derivatives in a net liability position (1)	1,746	2,049
Derivatives Subject to Credit- Contingent Provisions | Fixed maturity securities AFS
Credit Derivatives [Line Items]
Estimated fair value of collateral provided:	1,923	2,267
Derivatives Not Subject to Credit- Contingent Provisions
Credit Derivatives [Line Items]
Estimated fair value of derivatives in a net liability position (1)	0	0
Derivatives Not Subject to Credit- Contingent Provisions | Fixed maturity securities AFS
Credit Derivatives [Line Items]
Estimated fair value of collateral provided:	$ 0	$ 0