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Borrowings Interest income/(expense) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Interest income/(expense) [Abstract]    
Interest Expense, Net of Capitalized Interest $ (81) $ (92)
Interest and Investment Income, Net 130 20
Available-for-sale Securities, Realized Gains, net 59  
Cost-method Investments, Realized Gains, net $ 46