Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.8.0.1
Document and Entity Information - USD ($)
shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2017
Feb. 16, 2018
Jun. 30, 2017
Document and Entity Information [Abstract]      
Entity Registrant Name Pandora Media, Inc.    
Entity Central Index Key 0001230276    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   254,884  
Entity Voluntary Filers No    
Entity Well Known Seasoned Issuer Yes    
Entity Public Float     $ 1,189