DEI Document (USD $) In Millions, except Share data in Thousands	12 Months Ended
	Sep. 25, 2011	Oct. 31, 2011	Mar. 27, 2011
Document Information [Line Items]
Entity Registrant Name	QUALCOMM INC/DE
Entity Central Index Key	0000804328
Current Fiscal Year End Date	--09-25
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Sep. 25, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		1,680,984,426
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 86,665,135,824