SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jun. 30, 2019
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”). Prior to February 1, 2015, PLC’s stock was publicly traded on the New York Stock Exchange. Subsequent to the Merger date, PLC and the Company remain as SEC registrants within the United States. 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 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 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 and six months ended June 30, 2019, are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2019. 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, 2018. 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.
Reclassifications	Certain reclassifications have been made in previously reported financial statements and accompanying notes to make prior period amounts comparable to those of the current period. Such reclassifications had no effect on previously reported net income or shareowner’s equity.
Entities Included	Entities Included The consolidated condensed financial statements in this report include the accounts of Protective Life Insurance Company and its 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. 2016-02 - Leases. The amendments in this Update address certain aspects of recognition, measurement, presentation, and disclosure of leases. The most significant change relates to the accounting model used by lessees. The Update requires all leases with terms greater than 12 months to be recorded on the balance sheet in the form of a lease asset and liability. The lease asset and liability are measured at the present value of the minimum lease payments less any upfront payments or fees. The amendments in the Update became effective for annual and interim periods beginning after December 15, 2018 on a modified retrospective basis. The Company recorded a cumulative effect adjustment as of the date of adoption, January 1, 2019, establishing a right of use asset and lease liability of $18.2 million on its consolidated condensed balance sheet reflected in the property and equipment and other liabilities line items, respectively. ASU No. 2017-08 - Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. The amendments in this Update require that premiums on callable debt securities be amortized to the first call date. This is a change from previous guidance, under which premiums are amortized to the maturity date of the security. The amendments became effective for annual and interim periods beginning after December 15, 2018. The Company recorded a cumulative effect adjustment as of the adoption date, January 1, 2019, resulting in a $50.8 million reduction to retained earnings, net of income tax. ASU No. 2017-12 - Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in this Update are designed to permit hedge accounting to be applied to a broader range of hedging strategies as well as to more closely align hedge accounting and risk management objectives. Specific provisions include requiring changes in the fair value of a hedging instrument be recorded in the same income statement line as the hedged item when it affects earnings. In addition, after a hedge has initially qualified as an effective hedge the Update permits the use of a qualitative hedge effectiveness test in subsequent periods. The amendments in this Update became effective for annual and interim periods beginning after December 15, 2018 and early adoption is permitted. At adoption, January 1, 2019, this standard did not have an impact on the Company’s operations or financial results. Accounting Pronouncements Not Yet Adopted ASU No. 2016-13 - Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments. The amendments in this Update introduce a new current expected credit loss (“CECL”) model for certain financial assets, including mortgage loans and reinsurance receivables. The new model will not apply to debt securities classified as available-for-sale. For assets within the scope of the new model, an entity will recognize as an allowance against earnings its estimate of the contractual cash flows not expected to be collected on day one of the asset’s acquisition. The allowance may be reversed through earnings if a security recovers in value. This differs from the current impairment model, which requires recognition of credit losses when they have been incurred and recognizes a security’s subsequent recovery in value in other comprehensive income. The Update also makes targeted changes to the current impairment model for available-for-sale debt securities, which comprise the majority of the Company’s invested assets. Similar to the CECL model, credit loss impairments will be recorded in an allowance against earnings that may be reversed for subsequent recoveries in value. The amendments in this Update, along with related amendments in ASU No. 2018-19 - Codification Improvements to Topic 326, Financial Instruments-Credit Losses, are effective for annual and interim periods beginning after December 15, 2019 on a modified retrospective basis. The Company has completed its scoping and gap analysis with respect to the implementation of the new standard. Based on the results of this analysis, the Company’s implementation efforts are primarily focused on the application of the CECL model to a) its portfolio of commercial mortgage loans and b) amounts recoverable from reinsurers. The Company is currently engaged in a project to implement new processes with respect to the measurement and recognition of the CECL allowance for these assets, along with the additional disclosures required by the Update. The impact of this standard on the Company’s financial results cannot yet be reasonably estimated. 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. The amendments in this Update are currently effective for annual and interim periods beginning after December 31, 2020 with early adoption permitted. However, in July 2019, the Financial Accountings Standards Board (the “FASB”) voted to expose an Accounting Standards Update for public comment which would extend the implementation deadline for public business entities by one year to periods beginning after December 15, 2021. 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.