Derivatives (Credit Risk on Freestanding Derivatives) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Credit Derivatives [Line Items]
Collateral Amount Not Provided Due to Downgrade Threshold	$ 15
Estimated fair value of derivatives in a net liability position (1)	1,595	$ 1,185
Derivative assets	10,466	11,866
Derivative liabilities	3,852	4,229
Fixed maturity securities AFS
Credit Derivatives [Line Items]
Estimated fair value of collateral provided:	1,591	1,224
Accrued Liabilities [Member]
Credit Derivatives [Line Items]
Derivative assets	130	92
Derivative liabilities	(23)	(58)
Derivatives Subject to Credit-Contingent Provisions
Credit Derivatives [Line Items]
Estimated fair value of derivatives in a net liability position (1)	1,386	1,182
Derivatives Subject to Credit-Contingent Provisions | Fixed maturity securities AFS
Credit Derivatives [Line Items]
Estimated fair value of collateral provided:	1,370	1,222
Derivatives Not Subject to Credit-Contingent Provisions
Credit Derivatives [Line Items]
Estimated fair value of derivatives in a net liability position (1)	209	3
Derivatives Not Subject to Credit-Contingent Provisions | Fixed maturity securities AFS
Credit Derivatives [Line Items]
Estimated fair value of collateral provided:	$ 221	$ 2