Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	$ 5,661	$ 5,205	$ 10,546	$ 10,641
Net investment gains (losses)	(273)	(421)	(660)	(796)
Gain (Loss) on Derivative Instruments, Net, Pretax	796	508	364	1,487
Policyholder Benefits and Claims Incurred, Net	(10,767)	(11,485)	(22,573)	(21,559)
Interest credited to PABs	2,400	2,000	4,047	4,290
Operating Expenses	3,319	3,180	6,669	6,397
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	28	(11)	(11)	36
Derivative, Gain (Loss) on Derivative, Net	899	715	564	1,926
Operating Expenses	0	0	0	0
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	1	0	(1)	2
Net investment gains (losses)	0	(7)	(1)	(11)
Policyholder Benefits and Claims Incurred, Net	(6)	(7)	(10)	(13)
Interest credited to PABs	1	2	1	1
Operating Expenses	0	0	0	0
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	7	7	26	16
Net investment gains (losses)	4	(12)	6	(27)
Derivative, Gain (Loss) on Derivative, Net	0	0	0	0
Interest credited to PABs	0	0	0	0
Operating Expenses	0	0	0	0
Other Comprehensive Income (Loss), before Tax	(2,138)	(157)	(2,283)	(141)
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment gains (losses)	0	0	0	0
Other Comprehensive Income (Loss), before Tax	(80)	201	(166)	381
Foreign Exchange Forward [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax				344
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment gains (losses)	0	0	0	0
Other Comprehensive Income (Loss), before Tax	(71)	184	(143)
Interest rate contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	6	5	23	13
Net investment gains (losses)	9	(3)	9	(1)
Derivative, Gain (Loss) on Derivative, Net	0	0	0	0
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Interest credited to PABs	0	0	0	0
Operating Expenses	0	0	0	0
Other Comprehensive Income (Loss), before Tax	(15)	(2)	(32)	(12)
Credit forwards [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Net investment gains (losses)	0	1	0	1
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Policyholder Benefits and Claims Incurred, Net	0	0	0
Interest credited to PABs	0	0	0
Operating Expenses	0	0	0
Other Comprehensive Income (Loss), before Tax	0	(1)	0	(1)
Currency Swap [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	1	2	3	3
Net investment gains (losses)	1,086	(8)	1,446	(376)
Derivative, Gain (Loss) on Derivative, Net	0	0	0	0
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Interest credited to PABs	0	0	0	0
Operating Expenses	0	0	0	0
Other Comprehensive Income (Loss), before Tax	(1,087)	6	(1,449)	373
Derivative [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Net investment gains (losses)	(1)	0	(4)	4
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Interest credited to PABs	0	0	0	0
Operating Expenses	0	0	0	0
Derivative [Member] | Interest rate swaps | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	1	0
Net investment gains (losses)	0	0	0	0
Policyholder Benefits and Claims Incurred, Net	(2)	41	(77)	150
Interest credited to PABs	11	15	53	58
Operating Expenses	0	0	0	0
Derivative [Member] | Currency Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	18	(2)	28	2
Net investment gains (losses)	5	(26)	13	(57)
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Interest credited to PABs	87	7	123	31
Operating Expenses	0	0	0	0
Debt Securities [Member] | Interest rate swaps | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	1	0
Net investment gains (losses)	0	0	0	0
Policyholder Benefits and Claims Incurred, Net	(8)	34	(87)	137
Interest credited to PABs	12	13	52	55
Operating Expenses	0	0	0	0
Debt Securities [Member] | Currency Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	17	(2)	27	0
Net investment gains (losses)	(4)	19	(10)	42
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Interest credited to PABs	87	7	123	35
Operating Expenses	0	0	0	0
Non-derivative [Domain] [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	(9)	17	(23)	37
Foreign Currency Gain (Loss) [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Net investment gains (losses)	(1,091)	(2)	(1,449)	349
Derivative, Gain (Loss) on Derivative, Net	0	0	0	0
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Interest credited to PABs	0	0	0	0
Operating Expenses	0	0	0	0
Other Comprehensive Income (Loss), before Tax	0	0	0	0
Accumulated Other Comprehensive Income (Loss) | Credit forwards [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	0	0	0	0
Accumulated Other Comprehensive Income (Loss) | Currency Swap [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	(801)	104	(680)	(19)
Accumulated Other Comprehensive Income (Loss) | Interest rate swaps | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	(235)	(264)	(122)	(482)
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Derivative, Gain (Loss) on Derivative, Net	317	564	72	1,270
Credit derivatives — purchased | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Derivative, Gain (Loss) on Derivative, Net	6	(9)	15	(2)
Credit derivatives — written | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Derivative, Gain (Loss) on Derivative, Net	(38)	12	(11)	(22)
Equity Market Risk [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	28	(11)	(11)	36
Derivative, Gain (Loss) on Derivative, Net	441	108	382	450
Interest Rate Risk [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Derivative, Gain (Loss) on Derivative, Net	272	218	174	571
Foreign Currency Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	0	0	0	0
Derivative, Gain (Loss) on Derivative, Net	(99)	(178)	(68)	(341)
Net Derivative Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	(9)	53	86	83
Net investment gains (losses)	0	0	0	0
Gain (Loss) on Derivative Instruments, Net, Pretax	(106)	(180)	(216)	(361)
Policyholder Benefits and Claims Incurred, Net	(2)	2	(4)	6
Interest credited to PABs	34	44	74	93
Other Comprehensive Income (Loss), before Tax	0	0	0	0
Net Embedded Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	22	8	57	(40)
Synthetic GICs [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(21)	(19)	(40)	(38)
Embedded derivatives - other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(2)		(1)
Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income (1)	(31)	49	100	65
Net investment gains (losses)	4	(19)	5	(38)
Derivative, Gain (Loss) on Derivative, Net	796	508	364
Gain (Loss) on Derivative Instruments, Net, Pretax				1,487
Policyholder Benefits and Claims Incurred, Net	4	9	6	19
Interest credited to PABs	(35)	(46)	(73)	(92)
Operating Expenses	0	0	0	0
Other Comprehensive Income (Loss), before Tax	$ (2,218)	$ 44	$ (2,449)	$ 240