SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Protective Life Insurance Company (the “Company”), a stock life insurance company, was founded in 1907. The Company is a wholly owned subsidiary of Protective Life Corporation (“PLC”), an insurance holding company. On February 1, 2015, PLC became a wholly owned subsidiary of The Dai-ichi Life Insurance Company, Limited, a kabushiki kaisha organized under the laws of Japan (now known as Dai-ichi Life Holdings, Inc., “Dai-ichi Life”), when DL Investment (Delaware), Inc., a wholly owned subsidiary of Dai-ichi Life, merged with and into PLC (the “Merger”). The Company markets individual life insurance, credit life and disability insurance, guaranteed investment contracts, guaranteed funding agreements, fixed and variable annuities, and extended service contracts throughout the United States. The Company also maintains a separate segment devoted to the acquisition of insurance policies from other companies. PLC is a holding company with subsidiaries that provide financial services through the production, distribution, and administration of insurance and investment products. These consolidated condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for the interim periods presented herein. In the opinion of management, the accompanying consolidated condensed financial statements reflect all adjustments (consisting only of normal recurring items) necessary for a fair presentation of the results for the interim periods presented. Operating results for the three months ended March 31, 2021, are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2021. The year-end consolidated condensed financial data included herein was derived from audited financial statements but this report does not include all disclosures required by GAAP. For further information, refer to the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. The operating results of companies in the insurance industry have historically been subject to significant fluctuations due to changing competition, economic conditions, interest rates, investment performance, insurance ratings, claims, persistency, and other factors. Shades Creek Captive Insurance Company (“Shades Creek”) was a direct wholly owned insurance subsidiary of PLC through December 31, 2020. On January 1, 2021, Shades Creek was merged with and into the Company, with the Company being the surviving entity. The Company accounted for the transaction pursuant to Accounting Standards Codification (“ASC”) 805-50 “Transactions between Entities under Common Control”. The transferred assets and liabilities of Shades Creek were recorded by the Company at their carrying value at the date of transfer. In accordance with ASC 805-50, all prior financial information has been recast to reflect this transaction as of the earliest period presented under common control, January 1, 2020. Beginning in the first quarter of 2020, the outbreak of COVID-19 created significant economic and social disruption and impacted various operational and financial aspects of the Company’s business. Since the initial declines at the beginning of the pandemic, equity markets have largely recovered. However, the pandemic continues to impact the Company’s earnings based on, amongst other factors, the volume and severity of claims related to COVID-19 and the financial disruption caused by the pandemic, which could impact the Company’s investment portfolio.
Entities Included	Entities Included The consolidated condensed financial statements in this report include the accounts of Protective Life Insurance Company and affiliate companies in which the Company holds a majority voting or economic interest. Intercompany balances and transactions have been eliminated.
Accounting Pronouncements Recently Adopted and Not Yet Adopted	Accounting Pronouncements Recently Adopted Accounting Standards Update (“ASU” or “Update”) No. 2019-12 – Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in this Update remove certain exceptions to the general principles in Topic 740 related to intraperiod tax allocations, interim tax calculations, and outside basis differences. The amendments also clarify and amend guidance in certain other areas of Topic 740 in order to eliminate diversity in practice. The amendments in this Update are effective for public business entities in fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. The adoption of this Update did not have a material impact on the Company’s operations and financial results. Accounting Pronouncements Not Yet Adopted ASU No. 2018-12 - Financial Services - Insurance (Topic 944): Targeted Improvements to Accounting for Long-Duration Contracts. The amendments in this Update are designed to make improvements to the existing recognition, measurement, presentation, and disclosure requirements for certain long-duration contracts issued by an insurance company. The new amendments require insurance entities to provide a more current measure of the liability for future policy benefits for traditional and limited-payment contracts by regularly refining the liability for actual past experience and updated future assumptions. This differs from current requirements where assumptions are locked-in at contract issuance for these contract types. In addition, the updated liability will be discounted using an upper-medium grade (low-credit-risk) fixed income instrument yield that reflects the characteristics of the liability which differs from currently used rates based on the invested assets supporting the liability. In addition, the amendments introduce new requirements to assess market-based insurance contract options and guarantees for Market Risk Benefits and measure them at fair value. This Update also requires insurance entities to amortize deferred acquisition costs on a constant-level basis over the expected life of the contract. Finally, this Update requires new disclosures including liability rollforwards and information about significant inputs, judgments, assumptions, and methods used in the measurement. In November 2020, FASB issued ASU No. 2020-11 - Financial Services - Insurance (Topic 944); Effective Date and Early Application which deferred the effective date to periods beginning after December 15, 2022. The Company is currently reviewing its policies, processes, and applicable systems to determine the impact this standard will have on its operations and financial results.

PROTECTIVE LIFE INSURANCE CO 10-Q