Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details)

v3.10.0.1
Acquisitions (Details)
$ in Millions
3 Months Ended 12 Months Ended 30 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 24, 2017
USD ($)
businesses
Sep. 25, 2016
USD ($)
businesses
Aug. 03, 2019
USD ($)
Feb. 03, 2017
USD ($)
Business Acquisition [Line Items]            
Long-term debt, Principal amount $ 15,500 $ 15,500 $ 21,000      
Goodwill 6,498 [1] $ 6,498 [1] $ 6,623 [1] $ 5,679    
Weighted-average amortization period (years)   10 years 10 years      
QCT [Member]            
Business Acquisition [Line Items]            
Goodwill 5,587 [1] $ 5,587 [1] $ 5,581 [1] 4,674    
QTL [Member]            
Business Acquisition [Line Items]            
Goodwill 718 [1] 718 [1] 741 [1] 718    
Nonreportable Segments [Member]            
Business Acquisition [Line Items]            
Goodwill $ 193 [1] $ 193 [1] $ 301 [1] 287    
Technology-based [Member]            
Business Acquisition [Line Items]            
Weighted-average amortization period (years)   10 years 10 years      
Customer-related [Member]            
Business Acquisition [Line Items]            
Weighted-average amortization period (years)   10 years 9 years      
Marketing-related [Member]            
Business Acquisition [Line Items]            
Weighted-average amortization period (years)   5 years 4 years      
Series of Individually Immaterial Business Acquisitions [Member]            
Business Acquisition [Line Items]            
Maximum amount of contingent consideration     $ 94      
Goodwill     47 172    
Business Acquisition, Goodwill, Expected Tax Deductible Amount     $ 12 $ 24    
Number of businesses acquired | businesses     3 4    
Payments to Acquire Businesses, Net of Cash Acquired     $ 35 $ 392    
Series of Individually Immaterial Business Acquisitions [Member] | QCT [Member]            
Business Acquisition [Line Items]            
Goodwill     12      
Series of Individually Immaterial Business Acquisitions [Member] | QTL [Member]            
Business Acquisition [Line Items]            
Goodwill     23      
Series of Individually Immaterial Business Acquisitions [Member] | Nonreportable Segments [Member]            
Business Acquisition [Line Items]            
Goodwill     11      
Series of Individually Immaterial Business Acquisitions [Member] | Technology-based [Member]            
Business Acquisition [Line Items]            
Intangible assets subject to amortization:       $ 257    
Weighted-average amortization period (years)       4 years    
RF360 Holdings [Member]            
Business Acquisition [Line Items]            
Business Acquisition, Percentage of Voting Interested Acquired 51.00% 51.00%        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 49.00% 49.00%        
Time period after which option becomes exercisable   in August 2019        
Maximum amount of contingent consideration $ 200 $ 200        
Cash Consideration   1,463        
Fair value of Put and Call Option to acquire remaining interest 1,112 1,112        
Fair value of contingent consideration and deferred payments 496 496        
Total purchase price   $ 3,071        
Cash and cash equivalents           $ 306
Accounts receivable           303
Inventories           260
Property, plant and equipment           821
Goodwill           843
Other assets           31
Total assets           3,472
Liabilities           (401)
Business Acquisition, Goodwill, Expected Tax Deductible Amount           366
Pro Forma Revenue     22,806 $ 24,731    
Pro Forma Net income attributable to Qualcomm     $ 2,614 $ 5,791    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net           3,071
Business Acquisition, Date of Acquisition Agreement   Feb. 03, 2017        
Liabilities, fair value adjustment   $ (23)        
RF360 Holdings [Member] | In-process research and development (IPR&D) [Member]            
Business Acquisition [Line Items]            
In-process research and development (IPR&D)           75
In-Process Research and Development Estimated Useful Life Upon Completion   6 years        
RF360 Holdings [Member] | Technology-based [Member]            
Business Acquisition [Line Items]            
Intangible assets subject to amortization:           738
Weighted-average amortization period (years)   7 years        
RF360 Holdings [Member] | Customer-related [Member]            
Business Acquisition [Line Items]            
Intangible assets subject to amortization:           87
Weighted-average amortization period (years)   9 years        
RF360 Holdings [Member] | Marketing-related [Member]            
Business Acquisition [Line Items]            
Intangible assets subject to amortization:           $ 8
Weighted-average amortization period (years)   1 year        
NXP [Member]            
Business Acquisition [Line Items]            
NXP termination fee $ 2,000          
Scenario, Forecast [Member] | RF360 Holdings [Member]            
Business Acquisition [Line Items]            
Agreed exercise price of option to purchase/sell ownership interest         $ 1,150  
[1] Cumulative goodwill impairments were $666 million and $537 million at September 30, 2018 and September 24, 2017, respectively.