Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v2.4.0.6
Document And Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Jan. 31, 2012
Mar. 12, 2012
Jul. 29, 2011
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 31, 2012    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2012    
Entity Registrant Name Pandora Media, Inc.    
Entity Central Index Key 0001230276    
Current Fiscal Year End Date --01-31    
Entity Filer Category Non-accelerated Filer    
Entity Common Stock, Shares Outstanding   164,958,154  
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 955
Entity Current Reporting Status Yes    
Entity Voluntary Filers No