Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

v2.4.0.6
Employee Benefit Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 25, 2011
Sep. 26, 2010
Qualcomm Equity Compensation Plan [Abstract]      
Percentage of eligible employee compensation that can be contributed to 401(k) plan 100.00%    
Company's contribution expense to 401(k) plan $ 60 $ 52 $ 46
Restricted Stock Units [Member]
     
Qualcomm Equity Compensation Plan [Abstract]      
Maximum vesting period 3 years 0 months 0 days    
Restricted Stock Units, Additional Disclosures [Abstract]      
Total vest-date fair value of restricted stock units that vested during the period 352 43 1
Number of shares withheld upon vesting of restricted stock units to satisfy statutory filing requirements 1,965,000 243,000  
Total payments for employees' tax obligations to taxing authorities $ 131 $ 14