Background and Basis of Presentation (Policies)	6 Months Ended
Background and Basis of Presentation (Policies)	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. The condensed consolidated financial statements include the results of Chegg, Inc. and its wholly-owned subsidiaries. Significant intercompany balances and transactions have been eliminated. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, including normal recurring adjustments, necessary to present fairly our financial position as of June 30, 2022, our results of operations, results of comprehensive (loss) income, and stockholders' equity for the three and six months ended June 30, 2022 and 2021 and cash flows for the six months ended June 30, 2022 and 2021. Our results of operations, results of comprehensive (loss) income, stockholders' equity, and cash flows for the six months ended June 30, 2022 are not necessarily indicative of the results to be expected for the full year. We have a single operating and reportable segment and operating unit structure. The condensed consolidated financial statements and related financial information should be read in conjunction with the audited consolidated financial statements and the related notes thereto that are included in our Annual Report on Form 10-K for the year ended December 31, 2021 (the Annual Report on Form 10-K) filed with the SEC. There have been no material changes to our significant accounting policies as compared to the significant accounting policies described in our Annual Report on Form 10-K.
Use of Estimates	Use of EstimatesThe preparation of financial statements in conformity with GAAP requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities; the disclosure of contingent liabilities at the date of the financial statements; and the reported amounts of revenues and expenses during the reporting periods. We base our estimates on historical experience, knowledge of current business conditions, and various other factors we believe to be reasonable under the circumstances. These estimates are based on management’s knowledge about current events and expectations about actions we may undertake in the future. Actual results could differ from these estimates, and such differences could be material to our financial position and results of operations.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Issued Accounting Pronouncements Not Yet Adopted There were no accounting pronouncements issued during the six months ended June 30, 2022 that would have an impact on our financial statements. Recently Adopted Accounting Pronouncements In October 2021, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2021-08, Business Combinations-Accounting for Contract Assets and Contract Liabilities from Contracts with Customers (Topic 805). The new guidance requires contract assets and contract liabilities acquired in a business combination to be recognized in accordance with Accounting Standards Codification (ASC) Topic 606 as if the acquirer had originated the contracts. The standard is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, and early adoption is permitted. We early adopted ASU 2021-08 on January 1, 2022 and applied it to our acquisition of Busuu. The most significant impacts were an increase in contract liabilities, contained within deferred revenue, and goodwill. In May 2021, the FASB issued ASU 2021-04, Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options. ASU 2021-04 aims to clarify and reduce diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options that remain equity classified after modification or exchange based on the economic substance of the modification or exchange. Early adoption is permitted and the guidance must be applied prospectively to all modifications or exchanges that occur on or after the date of adoption. The guidance is effective for annual periods beginning after December 15, 2021. We adopted ASU 2021-04 on January 1, 2022 under the prospective method of adoption and there was no impact to our results of operations as we did not modify or exchange any freestanding equity-classified written call options.