Separate Account Assets and Liabilities - Separate Account Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Separate Account, Liability [Roll Forward]
Balance, beginning of year	$ 91,005
Balance, end of period	95,173
Life and Retirement
Separate Account, Liability [Roll Forward]
Balance, beginning of year	91,005	$ 84,853
Premiums and deposits	712	846
Policy charges	(439)	(490)
Surrenders and withdrawals	(2,285)	(1,923)
Benefit payments	(400)	(400)
Investment performance	6,622	4,469
Net transfers from (to) general account and other	(42)	2
Balance, end of period	95,173	87,357
Cash surrender value	93,985	86,076
Life and Retirement \| Individual Retirement
Separate Account, Liability [Roll Forward]
Balance, beginning of year	47,893	45,178
Premiums and deposits	294	451
Policy charges	(288)	(344)
Surrenders and withdrawals	(1,193)	(844)
Benefit payments	(239)	(215)
Investment performance	3,451	2,131
Net transfers from (to) general account and other	20	73
Balance, end of period	49,938	46,430
Cash surrender value	48,975	45,388
Life and Retirement \| Group Retirement
Separate Account, Liability [Roll Forward]
Balance, beginning of year	38,188	34,361
Premiums and deposits	340	360
Policy charges	(115)	(110)
Surrenders and withdrawals	(1,052)	(669)
Benefit payments	(154)	(130)
Investment performance	2,934	2,186
Net transfers from (to) general account and other	(76)	(78)
Balance, end of period	40,065	35,920
Cash surrender value	39,865	35,726
Life and Retirement \| Life Insurance
Separate Account, Liability [Roll Forward]
Balance, beginning of year	932	799
Premiums and deposits	9	9
Policy charges	(12)	(12)
Surrenders and withdrawals	(9)	(6)
Benefit payments	(2)	(1)
Investment performance	98	53
Net transfers from (to) general account and other	0	(1)
Balance, end of period	1,016	841
Cash surrender value	995	794
Life and Retirement \| Institutional Markets
Separate Account, Liability [Roll Forward]
Balance, beginning of year	3,992	4,515
Premiums and deposits	69	26
Policy charges	(24)	(24)
Surrenders and withdrawals	(31)	(404)
Benefit payments	(5)	(54)
Investment performance	139	99
Net transfers from (to) general account and other	14	8
Balance, end of period	4,154	4,166
Cash surrender value	$ 4,150	$ 4,168

Transfer To (From) Policyholder Account Balance (To) From General Account

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- Definition

Amount of cash outflow to separate account policyholder from benefit payment.

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- Definition

Amount of separate account liability payable to policyholder upon surrender of contract before maturity.

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- Definition

Amount of increase (decrease) in separate account liability from performance of investment.

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- Definition

Amount of decrease in separate account liability from policy charge.

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- Definition

Amount of cash inflow to separate account liability from premium and deposit from cash received.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of decrease in separate account liability from contract redemption and withdrawal of funds.

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- Definition

Amount of liability for variable contract in which all or portion of contract holder's funds is allocated to specific separate account and supported by assets held in separate account.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480078/944-80-55-18

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480109/944-80-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480141/944-80-45-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(18))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480109/944-80-50-2

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