Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity Changes in Stockholders' Equity (Details)

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Stockholders' Equity Changes in Stockholders' Equity (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Mar. 31, 2013
Dec. 30, 2012
Mar. 25, 2012
Dec. 25, 2011
Mar. 31, 2013
Mar. 25, 2012
Balance at beginning of period   $ 33,545     $ 33,545  
Net income (loss) 1,863   2,199   3,766 3,594
Other comprehensive income 141   315   155 455
Common stock issued under employee benefit plans and the related tax benefits, net of shares withheld for taxes         725  
Share-based compensation         562  
Dividends (439) (435) (377) (368) (874) (745)
Stock repurchases         (250)  
Other         (1)  
Balance at end of period 37,628       37,628  
Qualcomm Stockholders' Equity [Member]
            
Balance at beginning of period   33,523     33,523  
Net income (loss)         3,772  
Other comprehensive income         155  
Common stock issued under employee benefit plans and the related tax benefits, net of shares withheld for taxes         725  
Share-based compensation         562  
Dividends         (874)  
Stock repurchases         (250)  
Other         (2)  
Balance at end of period 37,611       37,611  
Noncontrolling Interests [Member]
            
Balance at beginning of period   22     22  
Net income (loss)         (6)  
Other comprehensive income         0  
Common stock issued under employee benefit plans and the related tax benefits, net of shares withheld for taxes         0  
Share-based compensation         0  
Dividends         0  
Stock repurchases         0  
Other         1  
Balance at end of period $ 17       $ 17