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Equity - Additional Information (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Jun. 29, 2013
Jun. 30, 2012
Stockholders Equity Note [Line Items]        
Dividend declared     $ 1,300,000,000  
Dividend declared, per share     $ 0.75  
Dividend, declaration date     Nov. 28, 2012  
Dividend, record date     Dec. 10, 2012  
Dividend, payment date     Dec. 28, 2012  
Dividend paid     1,324,000,000 1,076,000,000
Dividend paid, per share       $ 0.60
Common stock repurchases $ 800,000,000 $ 373,000,000 $ 2,694,000,000 $ 2,042,000,000
Common stock repurchases, shares     49  
Remaining shares authorized for repurchase 183   183