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Policyholder Account Balances (Schedule of Policyholder Account Balances) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 114,435	$ 110,227
Ul and Other [Member]
Policyholder Account Balance [Line Items]
Policyholder account balances	37,694	38,200	$ 38,185
Variable Annuities [Member]
Policyholder Account Balance [Line Items]
Policyholder account balances	22,184	19,148	12,145
Fixed Annuity [Member]
Policyholder Account Balance [Line Items]
Policyholder account balances	23,365	22,552	23,168
Retirement Plan Services Segment [Member]
Policyholder Account Balance [Line Items]
Policyholder account balances	25,138	23,579	$ 22,916
Other Operations [Member]
Policyholder Account Balance [Line Items]
Policyholder account balances	6,054	6,748
Reinsurance Agreement [Member] | Other Operations [Member]
Policyholder Account Balance [Line Items]
Policyholder account balances	$ 5,700	$ 6,300

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 7A
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-URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Paragraph 7A
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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