Description of Business	6 Months Ended
Description of Business	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business DraftKings Inc. is a digital sports entertainment and gaming company. The Company’s business-to-consumer (“B2C”) segment provides users with sports betting (“Sportsbook”), online casino (“iGaming”) and daily fantasy sports (“DFS”) products, as well as media and other online consumer products. The Company’s business-to-business (“B2B”) segment’s principal activities involve the design and development of sports betting and casino gaming software. As further discussed in the Explanatory Note and Note 3 hereof entitled “Acquisition of Golden Nugget Online Gaming, Inc.,” on May 5, 2022, Old DraftKings consummated the GNOG Transaction pursuant to the Merger Agreement. In connection with the GNOG Transaction, Old DraftKings undertook a holding company reorganization whereby New DraftKings became the going-forward public company and the direct parent company of both Old DraftKings and GNOG. New DraftKings was renamed “DraftKings Inc.” on the Closing Date. Unless otherwise indicated, the terms “DraftKings”, the “Company”, “we”, “us” and “our” refer to (i) Old DraftKings for periods preceding the Closing Date and (ii) New DraftKings for periods on and subsequent to the Closing Date, in each case, together with their respective consolidated subsidiaries. In May 2018, the Supreme Court (the “Court”) struck down on constitutional grounds the Professional and Amateur Sports Protection Act of 1992 (“PASPA”), a law that prohibited most states from authorizing and regulating sports betting. Since the Court’s decision, many states have legalized sports betting. As of June 30, 2022, 29 U.S. states, the District of Columbia and Puerto Rico have legalized some form of sports betting. Of those 31 legal jurisdictions in the United States, 25 have legalized online sports betting. Of those 25 jurisdictions, 20 are live, and DraftKings operates in 17 of them. The jurisdictions in the United States with statutes legalizing iGaming are Connecticut, Delaware, Michigan, New Jersey, Pennsylvania and West Virginia. As of June 30, 2022, the Company operates online Sportsbooks in Arizona, Colorado, Connecticut, Illinois, Indiana, Iowa, Louisiana, Michigan, New Hampshire, New Jersey, New York, Oregon, Pennsylvania, Tennessee, Virginia, West Virginia and Wyoming and has retail Sportsbooks in Colorado, Connecticut, Illinois, Iowa, Louisiana, Mississippi, New Hampshire, New Jersey and New York, as well as Ontario, Canada. As of June 30, 2022, the Company offers iGaming products in Connecticut, Michigan, New Jersey, Pennsylvania and West Virginia, as well as Ontario, Canada. The Company also has arrangements in place with land-based casinos to expand operations into additional states upon the passing of relevant legislation, the issuance of related regulations and the receipt of required licenses. Beginning in 2020 and continuing into 2022, the novel coronavirus (“COVID-19”) pandemic has adversely impacted global commercial activity, disrupted supply chains and contributed to significant volatility in financial markets. The primary impacts of the COVID-19 pandemic on the Company were the suspension, cancellation, rescheduling and shortening of sports seasons and sporting events, particularly between March 2020 and July 2020, when many sports seasons and sporting events, including the MLB regular season, domestic soccer leagues and European Cup competitions, the NBA regular season and playoffs, the NCAA college basketball tournament, the Masters golf tournament, and the NHL regular season and playoffs, were suspended or cancelled. The suspension of sports seasons and sporting events reduced customers’ use of, and spending on, the Company’s Sportsbook and DFS products. Beginning in July 2020, major professional sports leagues started to resume their activities, many of which with shortened seasons, and gradually resumed regular activities. In the six months ended June 30, 2022, sports seasons continued and sporting events were held as planned, including the NFL regular season, the NFL Playoffs and Superbowl LVI, the NBA regular season and playoffs, the NHL regular season and playoffs, the NASCAR Cup Series, various NCAA football bowl games, the NCAA college basketball regular season and tournament, the MLB regular season and several golf tournaments. The continued return of major sports and sporting events generated significant user interest and activity in the Company's Sportsbook and DFS products. However, the possibility remains that sports seasons and sporting events may be suspended, cancelled, rescheduled or shortened due to COVID-19 outbreaks. The Company’s revenue varies based on sports seasons and sporting events amongst other factors, and cancellations, suspensions or alterations resulting from COVID-19 have the potential to adversely affect the Company’s revenue, possibly materially. However, the Company’s products that do not rely on sports seasons and sporting events, such as iGaming, may partially offset this adverse impact on revenue. A significant or prolonged decrease in consumer spending on entertainment or leisure activities would also likely have an adverse effect on demand for the Company’s products, reducing cash flows and revenues, and thereby materially harming the Company’s business, financial condition and results of operations. In addition, a materially disruptive resurgence of COVID-19 cases or the emergence of additional variants or strains of COVID-19 could cause other widespread or more severe impacts depending on where infection rates are highest. As steps taken to mitigate the spread of COVID-19 necessitated a shift away from a traditional office environment for many employees, the Company implemented business continuity programs to ensure that employees were safe and that the business continued to function with minimal disruptions to normal work operations while employees worked remotely. During the second quarter of 2022, our primary offices, including our corporate headquarters in Boston, Massachusetts, re-opened with many of our employees returning to work onsite in various capacities. We will continue to monitor developments relating to disruptions and uncertainties caused by COVID-19.