Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative, Net	$ (11,017)	$ (11,968)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	40
Credit Default Swaps Referencing Indices, Sell Protection
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	881	912
Credit Risk Derivatives, at Fair Value, Net Asset	2	$ 10
Credit Default Swaps Referencing Indices, Sell Protection | NAIC 3
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	849
Credit Default Swaps Referencing Indices, Sell Protection | NAIC 6
Derivative [Line Items]
Credit Derivative, Maximum Exposure, Undiscounted	$ 32