SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
Mar. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements included herein have been prepared by Alliance Data Systems Corporation (“ADSC” or, including its consolidated subsidiaries and variable interest entities (“VIEs”), the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, filed with the SEC on February 28, 2020. The unaudited condensed consolidated financial statements included herein reflect all adjustments (consisting of normal, recurring adjustments) which are, in the opinion of management, necessary to state fairly the results for the interim periods presented. The results of operations for the interim periods presented are not necessarily indicative of the operating results to be expected for any subsequent interim period or for the fiscal year. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect (1) the reported amounts of assets; (2) liabilities and disclosure of contingent assets and liabilities at the date of the financial statements; and (3) the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. For purposes of comparability, certain prior period amounts have been reclassified to conform to the current year presentation in accordance with GAAP. Effective March 31, 2019, the Company’s divested Epsilon segment met the criteria set forth in Accounting Standards Codification (“ASC”) 205-20, “Presentation of Financial Statements — Discontinued Operations,” and was subsequently sold on July 1, 2019. The Company’s products and services are reported under two segments—LoyaltyOne^® and Card Services.
Recently Issued and Adopted Accounting Standards	Recently Issued Accounting Standards In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Simplifying the Accounting for Income Taxes.” ASU 2019-12 eliminates certain exceptions within ASC 740, “Income Taxes,” and clarifies certain aspects of ASC 740 to promote consistency among reporting entities. ASU 2019-12 is effective for interim and annual reporting periods beginning after December 15, 2020, with early adoption permitted. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company does not expect the adoption of ASU 2019-12 to have a material impact on its consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This ASU provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU apply only to contracts and hedging relationships that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued due to reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. This ASU is elective and is effective upon issuance for all entities. The Company is evaluating the impact that adoption of ASU 2020-04 will have on its consolidated financial statements. Recently Adopted Accounting Standards In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments,” or ASC 326. This standard, referred to as Current Expected Credit Loss (“CECL”), required entities to utilize a financial instrument impairment model to establish an allowance based on expected losses over the life of the exposure rather than a model based on an incurred loss approach. Estimates of expected credit losses under the CECL model are based on relevant information about past events, current conditions, and reasonable and supportable forward-looking forecasts regarding the collectability of the loan portfolio. The Company adopted CECL on January 1, 2020 and recorded an increase in its allowance for loan loss at adoption of $644.0 million, which was recorded through a cumulative-effect adjustment to retained earnings, net of taxes. CECL also expanded the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating its allowance for loan loss. See Note 6, “Credit Card and Loan Receivables,” for the Company’s CECL disclosures. In addition, CECL modified the impairment model for available-for-sale debt securities and provided for a simplified accounting model for purchased financial assets with credit deterioration since their origination. CECL impacts the Company’s valuation of its accounts receivable and available-for-sale debt securities, with respect to which the Company’s adoption did not have a material impact on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, “Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 modifies the disclosure requirements on fair value measurements from Accounting Standards Codification (“ASC”) 820, “Fair Value Measurement.” ASU 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The Company’s adoption of this standard on January 1, 2020 did not have a material impact on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” ASU 2018-15 requires customers in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40, “Intangibles—Goodwill and Other—Internal-Use Software,” to determine which implementation costs may be capitalized. ASU 2018-15 is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The amendments in ASU 2018-15 can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company adopted ASU 2018-15 on January 1, 2020 on a prospective basis and the adoption did not have a material impact on its consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2020

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The unaudited condensed consolidated financial statements included herein have been prepared by Alliance Data Systems Corporation (“ADSC” or, including its consolidated subsidiaries and variable interest entities (“VIEs”), the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, filed with the SEC on February 28, 2020.

The unaudited condensed consolidated financial statements included herein reflect all adjustments (consisting of normal, recurring adjustments) which are, in the opinion of management, necessary to state fairly the results for the interim periods presented. The results of operations for the interim periods presented are not necessarily indicative of the operating results to be expected for any subsequent interim period or for the fiscal year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect (1) the reported amounts of assets; (2) liabilities and disclosure of contingent assets and liabilities at the date of the financial statements; and (3) the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. For purposes of comparability, certain prior period amounts have been reclassified to conform to the current year presentation in accordance with GAAP. Effective March 31, 2019, the Company’s divested Epsilon segment met the criteria set forth in Accounting Standards Codification (“ASC”) 205-20, “Presentation of Financial Statements — Discontinued Operations,” and was subsequently sold on July 1, 2019. The Company’s products and services are reported under two segments—LoyaltyOne^® and Card Services.

Recently Issued and Adopted Accounting Standards

Recently Issued Accounting Standards

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Simplifying the Accounting for Income Taxes.” ASU 2019-12 eliminates certain exceptions within ASC 740, “Income Taxes,” and clarifies certain aspects of ASC 740 to promote consistency among reporting entities. ASU 2019-12 is effective for interim and annual reporting periods beginning after December 15, 2020, with early adoption permitted. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company does not expect the adoption of ASU 2019-12 to have a material impact on its consolidated financial statements.

In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This ASU provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU apply only to contracts and hedging relationships that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued due to reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. This ASU is elective and is effective upon issuance for all entities. The Company is evaluating the impact that adoption of ASU 2020-04 will have on its consolidated financial statements.

Recently Adopted Accounting Standards

In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments,” or ASC 326. This standard, referred to as Current Expected Credit Loss (“CECL”), required entities to utilize a financial instrument impairment model to establish an allowance based on expected losses over the life of the exposure rather than a model based on an incurred loss approach. Estimates of expected credit losses under the CECL model are based on relevant information about past events, current conditions, and reasonable and supportable forward-looking forecasts regarding the collectability of the loan portfolio.

The Company adopted CECL on January 1, 2020 and recorded an increase in its allowance for loan loss at adoption of $644.0 million, which was recorded through a cumulative-effect adjustment to retained earnings, net of taxes. CECL also expanded the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating its allowance for loan loss. See Note 6, “Credit Card and Loan Receivables,” for the Company’s CECL disclosures.

In addition, CECL modified the impairment model for available-for-sale debt securities and provided for a simplified accounting model for purchased financial assets with credit deterioration since their origination. CECL impacts the Company’s valuation of its accounts receivable and available-for-sale debt securities, with respect to which the Company’s adoption did not have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, “Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 modifies the disclosure requirements on fair value measurements from Accounting Standards Codification (“ASC”) 820, “Fair Value Measurement.” ASU 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The Company’s adoption of this standard on January 1, 2020 did not have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” ASU 2018-15 requires customers in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40, “Intangibles—Goodwill and Other—Internal-Use Software,” to determine which implementation costs may be capitalized. ASU 2018-15 is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted. The amendments in ASU 2018-15 can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company adopted ASU 2018-15 on January 1, 2020 on a prospective basis and the adoption did not have a material impact on its consolidated financial statements.