Basis of Presentation	12 Months Ended
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Wayfair Inc. (the “Company”) is an e-commerce business offering visually inspiring browsing, compelling merchandising, easy product discovery and attractive prices for over seven million products from over 7,000 suppliers across five distinct brands— Wayfair.com, Joss & Main, AllModern, DwellStudio, and Birch Lane. In addition to generating net revenue through Direct Retail sales, which includes all sales generated primarily through the Company’s websites, mobile optimized websites, and mobile applications (“sites”), net revenue is also generated through sites operated by third parties and through third party advertising distribution providers that pay the Company based on the number of advertisement related clicks, actions, or impressions for advertisements placed on the Company’s sites. The consolidated financial statements and other disclosures contained in this Annual Report on Form 10-K are those of the Company. The Company was incorporated as a Delaware corporation on August 8, 2014. Prior to the effectiveness of Wayfair Inc.'s registration statement on Form S-1 related to its initial public offering ("IPO") in October 2014, Wayfair LLC was the principal operating entity. In connection with the IPO of the Company, Wayfair LLC completed a corporate reorganization pursuant to which Wayfair LLC became a wholly-owned subsidiary of the Company, and the holders of equity interests in Wayfair LLC became stockholders of the Company. The Company accounted for this restructuring in accordance with the guidance provided for entities under common ownership because the holders of the equity interests in Wayfair LLC held the same ownership interests in Wayfair Inc. as they did in Wayfair LLC immediately prior to the corporate reorganization. SK Retail, Inc. was the only holder of equity interest in Wayfair LLC with operations. Accordingly, the historical financial statements of SK Retail, Inc. have been combined with the historical financial statements of Wayfair LLC for the periods presented. In addition, all of our outstanding common units of Wayfair LLC were exchanged for, and all of our incentive units converted into, shares of Class B common stock. In addition, all of outstanding preferred units were exchanged for shares of Series A and Series B convertible preferred stock. Immediately prior to the completion of the IPO, all of our outstanding shares of Series A and Series B convertible preferred stock converted into shares of Class B common stock. In connection with this the Company also reclassified members' deficit of $306.2 million, accumulated under Wayfair LLC, to additional paid in capital. The consolidated statements of operations, comprehensive loss, and cash flows for the year ended December 31, 2015 are not necessarily indicative of the results of operations and cash flows that may be expected for the year ending December 31, 2016, or for any other period.

Basis of Presentation

Wayfair Inc. (the “Company”) is an e-commerce business offering visually inspiring browsing, compelling merchandising, easy product discovery and attractive prices for over seven million products from over 7,000 suppliers across five distinct brands— Wayfair.com, Joss & Main, AllModern, DwellStudio, and Birch Lane. In addition to generating net revenue through Direct Retail sales, which includes all sales generated primarily through the Company’s websites, mobile optimized websites, and mobile applications (“sites”), net revenue is also generated through sites operated by third parties and through third party advertising distribution providers that pay the Company based on the number of advertisement related clicks, actions, or impressions for advertisements placed on the Company’s sites.

The consolidated financial statements and other disclosures contained in this Annual Report on Form 10-K are those of the Company. The Company was incorporated as a Delaware corporation on August 8, 2014. Prior to the effectiveness of Wayfair Inc.'s registration statement on Form S-1 related to its initial public offering ("IPO") in October 2014, Wayfair LLC was the principal operating entity. In connection with the IPO of the Company, Wayfair LLC completed a corporate reorganization pursuant to which Wayfair LLC became a wholly-owned subsidiary of the Company, and the holders of equity interests in Wayfair LLC became stockholders of the Company. The Company accounted for this restructuring in accordance with the guidance provided for entities under common ownership because the holders of the equity interests in Wayfair LLC held the same ownership interests in Wayfair Inc. as they did in Wayfair LLC immediately prior to the corporate reorganization. SK Retail, Inc. was the only holder of equity interest in Wayfair LLC with operations. Accordingly, the historical financial statements of SK Retail, Inc. have been combined with the historical financial statements of Wayfair LLC for the periods presented. In addition, all of our outstanding common units of Wayfair LLC were exchanged for, and all of our incentive units converted into, shares of Class B common stock. In addition, all of outstanding preferred units were exchanged for shares of Series A and Series B convertible preferred stock. Immediately prior to the completion of the IPO, all of our outstanding shares of Series A and Series B convertible preferred stock converted into shares of Class B common stock. In connection with this the Company also reclassified members' deficit of $306.2 million, accumulated under Wayfair LLC, to additional paid in capital.

The consolidated statements of operations, comprehensive loss, and cash flows for the year ended December 31, 2015 are not necessarily indicative of the results of operations and cash flows that may be expected for the year ending December 31, 2016, or for any other period.