Annual report pursuant to Section 13 and 15(d)

Cover Page

v3.20.2
Cover Page - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Sep. 27, 2020
Nov. 02, 2020
Mar. 27, 2020
Cover [Abstract]      
Entity Registrant Name QUALCOMM INC/DE    
Entity Central Index Key 0000804328    
Current Fiscal Year End Date --09-27    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Sep. 27, 2020    
Document Transition Report false    
Entity File Number 0-19528    
Entity Registrant State of Incorporation DE    
Entity Employer ID 95-3685934    
Entity Address 5775 Morehouse Dr.,    
Entity City San Diego,    
Entity State CA    
Entity Zip Code 92121-1714    
City Area Code 858    
Entity Phone Number 587-1121    
Title of 12(b) Security Common stock, $0.0001 par value    
Trading Symbol QCOM    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 74,900
Entity Common Stock, Shares Outstanding   1,131