Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v2.4.1.9
Debt (Details) (USD $)
3 Months Ended
Mar. 29, 2015
Sep. 28, 2014
Short-term Debt [Line Items]    
Line of Credit Facility, Initiation Date Feb. 18, 2015  
Line of Credit Facility, Maximum Borrowing Capacity $ 4,000,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity  
Line of Credit Facility, Expiration Date Feb. 18, 2020  
Line of Credit Facility, Interest Rate During Period at the option of the Company, at either LIBOR (determined in accordance with the Revolving Credit Facility) plus a margin of 0.7% per annum or the Base Rate (determined in accordance with the Revolving Credit Facility), plus an initial margin of 0% per annum.  
Line of Credit Facility, Commitment Fee Percentage, per annum 0.05%us-gaap_LineOfCreditFacilityCommitmentFeePercentage  
Line of Credit Facility, Covenant Terms maintain a ratio of consolidated earnings before interest, taxes, depreciation and amortization to consolidated interest expense, as defined in the Revolving Credit Facility, of not less than three to one at the end of each fiscal quarter  
Line of Credit Facility, Covenant Compliance the Company was in compliance with the financial covenant  
Short-term debt 1,096,000,000us-gaap_ShortTermBorrowings 0us-gaap_ShortTermBorrowings
Commercial Paper [Member]    
Short-term Debt [Line Items]    
Short-term debt, Maximum Borrowing Capacity $ 4,000,000,000qcom_ShortTermDebtMaximumBorrowingCapacity
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_CommercialPaperMember
 
Short-term debt, Weighted Average Interest Rate 0.14%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_CommercialPaperMember
 
Minimum [Member] | Commercial Paper [Member]    
Short-term Debt [Line Items]    
Short-term debt Instrument, Term 1 day  
Maximum [Member] | Commercial Paper [Member]    
Short-term Debt [Line Items]    
Short-term debt Instrument, Term 397 days  
Weighted Average [Member] | Commercial Paper [Member]    
Short-term Debt [Line Items]    
Short-term debt Instrument, Remaining Term 58 days