Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net Liability	$ (7,402)	$ (3,351)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	19
Credit Default Swap, Selling Protection
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	643	47
Credit Risk Derivatives, at Fair Value, Net Asset (Liability) (less than)	8	$ 0
Credit Default Swap, Selling Protection | NAIC 3
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	542
Credit Default Swap, Selling Protection | NAIC 6
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	$ 101