v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 05, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-41379  
Entity Registrant Name DRAFTKINGS INC.  
Entity Incorporation, State or Country Code NV  
Entity Tax Identification Number 87-2764212  
Entity Address, Address Line One 222 Berkeley Street  
Entity Address, Address Line Two 5th Floor  
Entity Address, City or Town Boston  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02116  
City Area Code 617  
Local Phone Number 986-6744  
Title of 12(b) Security Class A Common Stock, $0.0001 par value  
Trading Symbol DKNG  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001883685  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Class A Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   496,470,071
Class B Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   393,013,951