v3.22.2.2
Cover Page - shares
 6 Months Ended
Sep. 30, 2022
Oct. 31, 2022
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
Document Transition Report false  
Entity File Number 001-38312  
Entity Registrant Name 8x8, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 77-0142404  
Entity Address, Address Line One 675 Creekside Way  
Entity Address, City or Town Campbell  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95008  
City Area Code 408  
Local Phone Number 727-1885  
Title of 12(b) Security COMMON STOCK, PAR VALUE $.001 PER SHARE  
Trading Symbol EGHT  
Security Exchange Name NYSE  
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 Common Stock, Shares Outstanding   111,688,301
Entity Central Index Key 0001023731  
Amendment Flag false  
Current Fiscal Year End Date --03-31  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2023