Annual report pursuant to Section 13 and 15(d)

Document and Entity Information Document

Document and Entity Information Document - USD ($)
12 Months Ended
Sep. 24, 2017
Oct. 30, 2017
Mar. 26, 2017
Document Information [Line Items]      
Entity Registrant Name QUALCOMM INC/DE    
Entity Registrant State of Incorporation Delaware    
Entity Address 5775 Morehouse Dr.    
Entity City San Diego    
Entity State California    
Entity Zip Code 92121-1714    
Entity Phone Number (858) 587-1121    
Entity Employer ID 953685934    
Entity Central Index Key 0000804328    
Current Fiscal Year End Date --09-24    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Sep. 24, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   1,474,164,639  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 83,990,231,661