Derivatives (Derivatives Pertaining to Hedged Items) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	$ (1,789)	$ (3,688)	$ (3,920)
Net Derivative Gains (Losses) Recognized for Hedged Items	11	(19)	(6)
Net investment income	5,139	5,100	4,560
Policyholder Benefits and Claims	4	8	0
Amount of Gains (Losses) Deferred in AOCI	(235)	134	(273)
Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	11	(9)	2
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	(10)	(8)
Policyholder Benefits and Claims	4	8	0
Amount of Gains (Losses) Deferred in AOCI	(235)	134	(273)
Net Derivative Gains (Losses) Recognized for Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(1,800)	(3,669)	(3,914)
Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(1,803)	(3,684)	(3,922)
Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	3	15	8
Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	45	53	54
Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	0	0	0
Net Investment Income | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	45	53	54
Interest rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Interest rate | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Policyholder Benefits and Claims	4	8	0
Amount of Gains (Losses) Deferred in AOCI	(12)	9	(1)
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(181)	(1,690)	(384)
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	3	2	1
Interest rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	0	0	0
Interest rate | Net Investment Income | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	3	3	3
Foreign currency exchange rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	11	(9)	2
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Foreign currency exchange rate | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	(10)	(8)
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	(223)	125	(272)
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(60)	48	(40)
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	0	13	7
Foreign currency exchange rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	0	0	0
Foreign currency exchange rate | Net Investment Income | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	42	50	51
Credit | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Credit | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	11	14	32
Credit | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	0	0	0
Equity market | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Equity market | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	1,515	1,894	570
Equity market | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	0	0	0
Embedded | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Policyholder Benefits and Claims	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Embedded | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(3,088)	(3,950)	(4,100)
Embedded | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	$ 0	$ 0	$ 0