Annual report pursuant to Section 13 and 15(d)

Document and Entity Information Document

Document and Entity Information Document (USD $)
12 Months Ended
Sep. 30, 2012
Nov. 05, 2012
Mar. 25, 2012
Document Information [Line Items]      
Entity Registrant Name QUALCOMM INC/DE    
Entity Central Index Key 0000804328    
Current Fiscal Year End Date --09-30    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Sep. 30, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   1,704,029,150  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 113,918,365,564