Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Notional	$ 487,415	$ 460,804
Assets	14,261	16,257
Liabilities	(27,154)	(26,353)
Embedded Derivative, Fair Value of Embedded Derivative, Net	(8,096)	(2,997)
PRISMIC Embedded Derivative, Fair Value of Embedded Derivative	(508)
Derivatives Designated as Hedge Accounting Instruments:
Derivative [Line Items]
Notional	36,263	34,491
Assets	2,050	3,690
Liabilities	(1,123)	(925)
Derivatives Designated as Hedge Accounting Instruments: | Interest Rate Swaps
Derivative [Line Items]
Notional	3,582	3,627
Assets	55	66
Liabilities	(252)	(245)
Derivatives Designated as Hedge Accounting Instruments: | Interest Rate Forwards
Derivative [Line Items]
Notional	0	398
Assets	0	0
Liabilities	0	(85)
Derivatives Designated as Hedge Accounting Instruments: | Foreign Currency Forwards
Derivative [Line Items]
Notional	4,748	4,830
Assets	43	155
Liabilities	(195)	(262)
Derivatives Designated as Hedge Accounting Instruments: | Foreign Currency Swaps
Derivative [Line Items]
Notional	27,933	25,636
Assets	1,952	3,469
Liabilities	(676)	(333)
Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative [Line Items]
Notional	451,152	426,313
Assets	12,211	12,567
Liabilities	(26,031)	(25,428)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Interest Rate Swaps
Derivative [Line Items]
Notional	224,445	212,934
Assets	8,604	9,097
Liabilities	(21,599)	(21,154)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Interest Rate Forwards
Derivative [Line Items]
Notional	3,678	2,354
Assets	39	21
Liabilities	(14)	(42)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Foreign Currency Forwards
Derivative [Line Items]
Notional	27,686	31,317
Assets	965	1,556
Liabilities	(954)	(1,924)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Foreign Currency Options
Derivative [Line Items]
Notional	0	0
Assets	0	0
Liabilities	0	0
Derivatives Not Qualifying as Hedge Accounting Instruments: | Foreign Currency Swaps
Derivative [Line Items]
Notional	7,771	8,410
Assets	502	813
Liabilities	(164)	(170)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Interest Rate Futures
Derivative [Line Items]
Notional	10,448	18,080
Assets	7	13
Liabilities	(26)	(24)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Interest Rate Options
Derivative [Line Items]
Notional	32,718	9,778
Assets	292	224
Liabilities	(1,095)	(280)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Credit Default Swaps
Derivative [Line Items]
Notional	3,446	6,351
Assets	64	27
Liabilities	0	(57)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Equity Futures
Derivative [Line Items]
Notional	672	1,372
Assets	1	1
Liabilities	(2)	(2)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Equity Options
Derivative [Line Items]
Notional	51,792	38,323
Assets	1,688	708
Liabilities	(1,662)	(1,590)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Total Return Swaps
Derivative [Line Items]
Notional	9,237	11,806
Assets	48	106
Liabilities	(514)	(184)
Derivatives Not Qualifying as Hedge Accounting Instruments: | Other
Derivative [Line Items]
Notional	1,250	1,250
Assets	0	0
Liabilities	0	0
Derivatives Not Qualifying as Hedge Accounting Instruments: | Synthetic GICs
Derivative [Line Items]
Notional	78,009	84,338
Assets	1	1
Liabilities	$ (1)	$ (1)