Maximum borrowing capacity under the credit facility which can be granted upon request by the entity.

No definition available.

Name:	plico_LineOfCreditFacilityMaximumBorrowingCapacityGrantedUponRequest
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Non-Recourse Funding Obligation, Excess Of Loss Asset In Excess Of Statutory And Economic Reserve Liability

+ References

No definition available.

+ Details

Name:	plico_NonRecourseFundingObligationExcessOfLossAssetInExcessOfStatutoryAndEconomicReserveLiability
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Non Recourse Funding Obligations, Term

+ References

No definition available.

+ Details

Name:	plico_NonRecourseFundingObligationsTerm
Namespace Prefix:	plico_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Reinsurance Financing Agreement Capacity

+ References

No definition available.

+ Details

Name:	plico_ReinsuranceFinancingAgreementCapacity
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the average daily balance of reverse repurchase liability.

+ References

No definition available.

+ Details

Name:	plico_ReverseRepurchaseAverageDailyBalance
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the average borrowing rate of average daily balance of the repurchase obligation.

+ References

No definition available.

+ Details

Name:	plico_ReverseRepurchaseAverageDailyBalanceAtAverageInterestRate
Namespace Prefix:	plico_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents proceeds from reverse repurchase liability for the balance sheet date.

+ References

No definition available.

+ Details

Name:	plico_ReverseRepurchaseLiability
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the average borrowing rate of repurchase obligation.

+ References

No definition available.

+ Details

Name:	plico_ReverseRepurchaseLiabilityAverageInterestRate
Namespace Prefix:	plico_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the maximum outstanding balance of reverse repurchase liability.

+ References

No definition available.

+ Details

Name:	plico_ReverseRepurchaseMaximumBalanceOutstanding
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Secured Borrowings, Percent Of Initial Collateral Required

+ References

No definition available.

+ Details

Name:	plico_SecuredBorrowingsPercentOfInitialCollateralRequired
Namespace Prefix:	plico_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

The fair value, as of the date of each statement of financial position presented, of securities which are owned but transferred to serve as collateral for the payment of repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

+ References

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-Publisher FASB
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-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

+ Details

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

- Definition

Amount of obligation to return securities collateral under master netting arrangements that have not been offset against securities borrowed.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

+ Details

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

- Definition

Fair value of the securities received as collateral against securities borrowed.

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-Topic 210
-SubTopic 20
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-Paragraph 12
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before effects of master netting arrangements, of financial assets loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and financial assets transferred other than securities that qualify as secured borrowings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=plico_RepurchaseProgramBorrowingsMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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Name:	us-gaap_DebtInstrumentAxis=plico_AmendedLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dei_LegalEntityAxis=plico_ProtectiveLifeCorporationMember
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DEBT AND OTHER OBLIGATIONS - Additional Information (Details) - USD ($)			3 Months Ended	12 Months Ended
	Oct. 01, 2020	May 03, 2018	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Initial collateral required (as a percent)			102.00%
Securities lending transactions			$ 129,000,000	$ 57,000,000
Fair value of collateral			133,000,000	59,000,000
Obligation to return collateral			133,000,000	59,000,000
Repurchase Program Borrowings
Debt Instrument [Line Items]
Fair value of securities pledged under the repurchase program			917,000,000	452,000,000
Maximum outstanding balance			1,077,000,000	825,000,000
Average daily balance			347,000,000	143,000,000
Secured financing liabilities			$ 854,000,000	$ 437,000,000
Average borrowing rate (as a percent)			0.15%	0.15%
Average borrowing rate (as a percent)			0.17%	0.33%
Repurchase Program Borrowings \| Maximum
Debt Instrument [Line Items]
Term of financing agreement			90 days
Credit Facility
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity		$ 1,000,000,000
Line of credit, maximum borrowing capacity to be granted upon entity's request		$ 2,000,000,000
Facility fee percentage		0.125%
Credit Facility \| Protective Life Corporation
Debt Instrument [Line Items]
Line of credit, amount outstanding			$ 385,000,000	$ 190,000,000
Credit Facility \| Federal Funds rate
Debt Instrument [Line Items]
Interest rate added to the base rate (as a percent)		0.50%
Credit Facility \| One Month LIBOR
Debt Instrument [Line Items]
Interest rate added to the base rate (as a percent)		1.00%
Financing Agreement With Golden Gate Captive Insurance Company
Debt Instrument [Line Items]
Financing capacity under the agreement	$ 5,000,000,000
XOL asset backing difference in statutory and economic reserve liabilities			$ 4,492,000,000
Financing Agreement With Golden Gate Captive Insurance Company \| Minimum
Debt Instrument [Line Items]
Reserve funding agreement, term	20 years
Financing Agreement With Golden Gate Captive Insurance Company \| Maximum
Debt Instrument [Line Items]
Reserve funding agreement, term	25 years