Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Credit Derivative, Purchased Credit Protection	$ 150	$ 2
Credit Risk Derivatives, at Fair Value, Net Asset (Liability) (less than)	14	0
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	11
Credit Default Swap, Selling Protection
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	157	0
Credit Risk Derivatives, at Fair Value, Net Asset (Liability) (less than)	11	0
Credit Default Swap, Selling Protection | NAIC 6
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	100
Credit Default Swap, Selling Protection | NAIC 3
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	57
Future policy benefits
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net Liability	(9,048)	(13,228)
Reinsurance recoverables
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net Liability	931	13,240
Policyholders' account balances
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net Liability	(3,246)	(1,155)
Other assets
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net Liability	73	0
Other Liabilities
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net Liability	$ (13)	$ 0