THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of operations ANGI Homeservices Inc. connects quality home service pros across 500 different categories, from repairing and remodeling to cleaning and landscaping, with consumers. Over 250,000 service professionals find work through ANGI Homeservices, and consumers turn to at least one of our brands to find a pro for more than 20 million projects each year. We’ve established category-transforming products with brands such as HomeAdvisor®, Angie’s List® and Handy. At March 31, 2019, IAC owned 83.3% and 98.0% of the economic and voting interest, respectively, of ANGI Homeservices. The Company has two operating segments (i) North America (United States and Canada), which includes HomeAdvisor, Angie's List, Handy, mHelpDesk, HomeStars, Fixd Repair, LLC and Fixd Services LLC (collectively, "Fixd Repair") and Felix, for periods prior to its sale on December 31, 2018, and (ii) Europe, which includes Travaux, MyHammer, My Builder, Werkspot and Instapro. As used herein, "ANGI Homeservices," the "Company," "ANGI," "we," "our" or "us" and similar terms refer to ANGI Homeservices Inc and its subsidiaries (unless the context requires otherwise).
Basis of Consolidation	Basis of Presentation and Consolidation The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”). The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated. For the purpose of these financial statements, income taxes have been computed as if ANGI Homeservices filed on a standalone, separate tax return basis.
Basis of Presentation	Basis of Presentation and Consolidation The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”). The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated. For the purpose of these financial statements, income taxes have been computed as if ANGI Homeservices filed on a standalone, separate tax return basis.
Accounting Estimates	Accounting Estimates Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its consolidated financial statements in accordance with GAAP. These estimates, judgments and assumptions impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of contingent assets and liabilities. Actual results could differ from these estimates. On an ongoing basis, the Company evaluates its estimates and judgments, including those related to: the recoverability of goodwill and indefinite-lived intangible assets; the useful lives and recoverability of definite-lived intangible assets and property and equipment; the fair values of cash equivalents and marketable debt securities; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; unrecognized tax benefits; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that the Company considers relevant.
Adoption of ASU No. 2016-02, Leases (Topic 842)	Adoption of ASU No. 2016-02, Leases (Topic 842) The Company adopted Accounting Standards Update 2016-02, Leases (Topic 842) ("ASC 842") effective January 1, 2019. ASC 842 superseded previously existing guidance on accounting for leases and generally requires all leases to be recognized in the statement of financial position. The adoption of ASC 842 resulted in the recognition of $69.4 million of right of use assets ("ROU assets") and related lease liabilities as of January 1, 2019, with no cumulative effect adjustment. The adoption of ASC 842 had no impact on the Company’s consolidated statement of operations and consolidated statement of cash flows. In addition, the adoption of ASC 842 did not impact the leverage calculation set forth in the agreement governing the Company's outstanding debt and revolving credit facility because, in each circumstance, the leverage calculation is not affected by the lease liabilities that were recorded upon adoption of ASC 842. The Company adopted ASC 842 prospectively and, therefore, did not revise comparative period information or disclosure. In addition, the Company elected the package of practical expedients permitted under ASC 842. See "Note 3—Leases" for additional information on the adoption of ASC 842.
Reclassifications	ReclassificationsCertain prior year amounts have been reclassified to conform to the current year presentation.
General Revenue Recognition	General Revenue Recognition Revenue is recognized when control of the promised services or goods is transferred to our customers, and in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services or goods. The Company's disaggregated revenue disclosures are presented in "Note 10—Segment Information." Deferred Revenue Deferred revenue consists of payments that are received or are contractually due in advance of the Company's performance. The Company’s deferred revenue is reported on a contract by contract basis at the end of each reporting period. The Company classifies deferred revenue as current when the term of the applicable subscription period or expected completion of our performance obligation is one year or less. The current and non-current deferred revenue balances at December 31, 2018 are $61.4 million and $0.5 million, respectively. During the three months ended March 31, 2019, the Company recognized $36.4 million of revenue that was included in the deferred revenue balance as of December 31, 2018. The current and non-current deferred revenue balances at March 31, 2019 are $62.9 million and $0.4 million, respectively. Non-current deferred revenue is included in “Other long-term liabilities” in the accompanying consolidated balance sheet. Practical Expedients and Exemptions As permitted under the practical expedient available under ASU No. 2014-09, Revenue from Contracts with Customers, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance, and (iii) contracts for which the Company recognizes revenue at the amount which we have the right to invoice for services performed. For sales incentive programs where the customer relationship period is one year or less, the Company has elected the practical expedient to expense the costs as incurred. The amount of capitalized sales commissions where the customer relationship period is greater than one year is $40.3 million and $38.8 million at March 31, 2019 and December 31, 2018, respectively.

THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of operations

ANGI Homeservices Inc. connects quality home service pros across 500 different categories, from repairing and remodeling to cleaning and landscaping, with consumers. Over 250,000 service professionals find work through ANGI Homeservices, and consumers turn to at least one of our brands to find a pro for more than 20 million projects each year. We’ve established category-transforming products with brands such as HomeAdvisor®, Angie’s List® and Handy.

At March 31, 2019, IAC owned 83.3% and 98.0% of the economic and voting interest, respectively, of ANGI Homeservices.

The Company has two operating segments (i) North America (United States and Canada), which includes HomeAdvisor, Angie's List, Handy, mHelpDesk, HomeStars, Fixd Repair, LLC and Fixd Services LLC (collectively, "Fixd Repair") and Felix, for periods prior to its sale on December 31, 2018, and (ii) Europe, which includes Travaux, MyHammer, My Builder, Werkspot and Instapro.

As used herein, "ANGI Homeservices," the "Company," "ANGI," "we," "our" or "us" and similar terms refer to ANGI Homeservices Inc and its subsidiaries (unless the context requires otherwise).

Basis of Consolidation

Basis of Presentation and Consolidation

The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”).

The consolidated financial statements include the accounts of the Company, all entities that are wholly-owned by the Company and all entities in which the Company has a controlling financial interest. Intercompany transactions and accounts have been eliminated.

For the purpose of these financial statements, income taxes have been computed as if ANGI Homeservices filed on a standalone, separate tax return basis.

Basis of Presentation

Basis of Presentation and Consolidation

The Company prepares its consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”).

For the purpose of these financial statements, income taxes have been computed as if ANGI Homeservices filed on a standalone, separate tax return basis.

Accounting Estimates

Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its consolidated financial statements in accordance with GAAP. These estimates, judgments and assumptions impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of contingent assets and liabilities. Actual results could differ from these estimates.

On an ongoing basis, the Company evaluates its estimates and judgments, including those related to: the recoverability of goodwill and indefinite-lived intangible assets; the useful lives and recoverability of definite-lived intangible assets and property and equipment; the fair values of cash equivalents and marketable debt securities; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; unrecognized tax benefits; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that the Company considers relevant.

Adoption of ASU No. 2016-02, Leases (Topic 842)

The Company adopted Accounting Standards Update 2016-02, Leases (Topic 842) ("ASC 842") effective January 1, 2019. ASC 842 superseded previously existing guidance on accounting for leases and generally requires all leases to be recognized in the statement of financial position.

The adoption of ASC 842 resulted in the recognition of $69.4 million of right of use assets ("ROU assets") and related lease liabilities as of January 1, 2019, with no cumulative effect adjustment. The adoption of ASC 842 had no impact on the Company’s consolidated statement of operations and consolidated statement of cash flows. In addition, the adoption of ASC 842 did not impact the leverage calculation set forth in the agreement governing the Company's outstanding debt and revolving credit facility because, in each circumstance, the leverage calculation is not affected by the lease liabilities that were recorded upon adoption of ASC 842.

The Company adopted ASC 842 prospectively and, therefore, did not revise comparative period information or disclosure. In addition, the Company elected the package of practical expedients permitted under ASC 842.

See "Note 3—Leases" for additional information on the adoption of ASC 842.

Reclassifications

ReclassificationsCertain prior year amounts have been reclassified to conform to the current year presentation.

General Revenue Recognition

Revenue is recognized when control of the promised services or goods is transferred to our customers, and in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services or goods.

The Company's disaggregated revenue disclosures are presented in "Note 10—Segment Information."

Deferred Revenue

Deferred revenue consists of payments that are received or are contractually due in advance of the Company's performance. The Company’s deferred revenue is reported on a contract by contract basis at the end of each reporting period. The Company classifies deferred revenue as current when the term of the applicable subscription period or expected completion of our performance obligation is one year or less. The current and non-current deferred revenue balances at December 31, 2018 are $61.4 million and $0.5 million, respectively. During the three months ended March 31, 2019, the Company recognized $36.4 million of revenue that was included in the deferred revenue balance as of December 31, 2018. The current and non-current deferred revenue balances at March 31, 2019 are $62.9 million and $0.4 million, respectively. Non-current deferred revenue is included in “Other long-term liabilities” in the accompanying consolidated balance sheet.

Practical Expedients and Exemptions

As permitted under the practical expedient available under ASU No. 2014-09, Revenue from Contracts with Customers, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, (ii) contracts with variable consideration that is allocated entirely to unsatisfied performance obligations or to a wholly unsatisfied promise accounted for under the series guidance, and (iii) contracts for which the Company recognizes revenue at the amount which we have the right to invoice for services performed.

For sales incentive programs where the customer relationship period is one year or less, the Company has elected the practical expedient to expense the costs as incurred. The amount of capitalized sales commissions where the customer relationship period is greater than one year is $40.3 million and $38.8 million at March 31, 2019 and December 31, 2018, respectively.