Assumed Reinsurance, Deferred Gain (Loss)

No definition available.

Name:	tl_AssumedReinsuranceDeferredGainLoss
Namespace Prefix:	tl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Life insurance recoveries on ceded reinsurance contracts.

+ References

No definition available.

+ Details

Name:	tl_LifeInsuranceRecoveriesOnCededReinsuranceContracts
Namespace Prefix:	tl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payment for Ceded Commissions

+ References

No definition available.

+ Details

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Period Type:	duration

- 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.

+ Details

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- Definition

The carrying amount as of the balance sheet date of the known and estimated amounts owed to insurers under reinsurance treaties or other arrangements.

+ References

No definition available.

+ Details

Name:	us-gaap_ReinsurancePayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) in allowance for credit loss on reinsurance recoverable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(6))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 310
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=99404803&loc=d3e21409-158489

+ Details

Name:	us-gaap_ReinsuranceRecoverables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance for credit loss on reinsurance recoverable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

+ Details

Name:	us-gaap_ReinsuranceRecoverablesAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of risk undertaken originally by insurer ceded to reinsurer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Reinsurance - Narrative (Details) - USD ($) $ in Millions				6 Months Ended		12 Months Ended
Reinsurance - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2022	Nov. 01, 2022	Dec. 30, 2021	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2022	Dec. 31, 2020
Effects of Reinsurance [Line Items]
Reinsurance recoverables	$ 40,400			$ 35,848		$ 40,400
ACL on reinsurance recoverable, decrease						10
Reinsurance recoverable, allowance for credit loss	27			37		27
Life insurance recoveries on ceded reinsurance contracts				782	$ 958	1,648	$ 1,500
Guardian \| Reinsurance Contract [Axis]: GIAC Reinsurance Agreement
Effects of Reinsurance [Line Items]
Reinsurance payable		$ 7,100
Payment for ceded commissions		65
Assumed reinsurance, deferred gain		90
Guardian \| Reinsurance Contract [Axis]: GIAC Reinsurance Agreement \| Separate Account Reserves
Effects of Reinsurance [Line Items]
Reinsurance payable		$ 6,700
Reinsured risk, percentage		100.00%
Allianz \| Reinsurance Contract [Axis]: Allianz Reinsurance Agreement
Effects of Reinsurance [Line Items]
Reinsurance recoverables				244
Allianz \| Reinsurance Contract [Axis]: Inforce Reinsurance Agreement
Effects of Reinsurance [Line Items]
Payment for ceded commissions			$ 866
Assumed reinsurance, deferred gain			25
Commonwealth \| FIA embedded derivative
Effects of Reinsurance [Line Items]
Reinsurance recoverables	8,000			8,700		8,000
Mass Mutual \| Retirement
Effects of Reinsurance [Line Items]
Reinsurance recoverables	6,700			6,800		6,700
Prudential \| Individual Life
Effects of Reinsurance [Line Items]
Reinsurance recoverables	13,500			13,100		13,500
TR Re \| Reinsurance Contract [Axis]: Affiliated Reinsurance Agreement
Effects of Reinsurance [Line Items]
Reinsurance recoverables				6,130
TR Re \| Reinsurance Contract [Axis]: Inforce Agreement and Flow Agreement
Effects of Reinsurance [Line Items]
Assumed reinsurance, deferred gain	137					137
Reinsurance recoverables	$ 5,192					5,192
Reinsured risk, percentage	75.00%
TR Re \| Reinsurance Contract [Axis]: TR Re Reinsurance Agreement
Effects of Reinsurance [Line Items]
Payment for ceded commissions			100
Assumed reinsurance, deferred gain			$ 805
TR Re \| Reinsurance Contract [Axis]: TR Re Reinsurance Agreement \| Variable Annuity and Payout Annuity Blocks
Effects of Reinsurance [Line Items]
Reinsured risk, percentage			50.00%
TR Re \| Reinsurance Contract [Axis]: TR Re Reinsurance Agreement \| Variable Annuity Guarantees and Structured Settlement Contracts
Effects of Reinsurance [Line Items]
Reinsured risk, percentage			100.00%
TR Re \| Individual Life
Effects of Reinsurance [Line Items]
Reinsurance recoverables	$ 11,200			$ 6,100		$ 11,200