Derivative Instruments Derivative Instruments (Hedged Item Offset By Derivatives Achieving Fair Value Hedge Accounting) (Details) (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Derivative [Line Items]
Fixed Maturities, available-for-sale, at fair value	[1]	$ 316,321	$ 307,719
Commercial mortgage and other loans	[1]	59,305	56,745
Policyholders’ account balances		(147,018)	(135,624)	[2]
Future policy benefits		(273,281)	(261,773)		$ (324,942)
Carrying Amount of the Hedged Assets (Liabilities)
Derivative [Line Items]
Fixed Maturities, available-for-sale, at fair value		224	297
Policyholders’ account balances		(810)	(966)
Future policy benefits		(2,441)	(2,354)
Cumulative Adjustment Included in Carrying Amount
Derivative [Line Items]
Fixed Maturities, available-for-sale, at fair value		19	27
Policyholders’ account balances		219	217
Future policy benefits		$ 298	$ 391

[1] See Note 4 for details of balances associated with variable interest entities.

[2] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.