Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details)

v3.19.3
Acquisitions (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 16, 2019
Aug. 04, 2019
Feb. 03, 2017
Sep. 29, 2019
Sep. 30, 2018
Sep. 24, 2017
Business Acquisition [Line Items]            
Weighted-average amortization period (years)       10 years 10 years  
Technology-based [Member]            
Business Acquisition [Line Items]            
Weighted-average amortization period (years)       10 years 10 years  
RF360 Holdings [Member]            
Business Acquisition [Line Items]            
Business Acquisition, Date of Acquisition Agreement     Feb. 03, 2017      
Business Acquisition, Percentage of Voting Interested Acquired     51.00%      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners     49.00%      
Agreed exercise price of option to purchase/sell ownership interest $ 1,150 $ 1,150        
Total purchase price     $ 3,100      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     833      
Pro Forma Revenue           $ 22,806
Pro Forma Net income attributable to Qualcomm           $ 2,614
RF360 Holdings [Member] | Technology-based [Member]            
Business Acquisition [Line Items]            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     $ 738      
Weighted-average amortization period (years)       7 years