Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities Available-for-sale Securities (Details)

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Marketable Securities Available-for-sale Securities (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Sep. 29, 2013
Contractual maturities of available-for-sale debt securities [Abstract]      
Years to Maturity - Less Than One Year $ 2,086    
Years to Maturity - One to Five Years 7,100    
Years to Maturity - Five to Ten Years 2,300    
Years to Maturity - Greater Than Ten Years 1,302    
Years to Maturity - No Single Maturity Date 5,755    
Total 18,543    
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]      
Gross Realized Gains 116 84  
Gross Realized Losses (3) (5)  
Net Realized Gains 113 79  
Available-for-sale Securities [Abstract]      
Cost 20,844   20,825
Unrealized Gains 1,229   1,189
Unrealized Losses (209)   (206)
Fair Value 21,864   21,808
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 4,539   5,642
Less than 12 months - Unrealized Losses (206)   (204)
More than 12 months - Fair Value 463   135
More than 12 months - Unrealized Losses (3)   (2)
Equity Securities [Member]
      
Available-for-sale Securities [Abstract]      
Cost 2,564   2,570
Unrealized Gains 809   793
Unrealized Losses (52)   (44)
Fair Value 3,321   3,319
Debt Securities (including debt funds) [Member]
      
Available-for-sale Securities [Abstract]      
Cost 18,280   18,255
Unrealized Gains 420   396
Unrealized Losses (157)   (162)
Fair Value 18,543   18,489
U.S. Treasury securities and government-related securities [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 155   42
Less than 12 months - Unrealized Losses (2)   (1)
More than 12 months - Fair Value 0   0
More than 12 months - Unrealized Losses 0   0
Corporate bonds and notes [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 2,335   2,084
Less than 12 months - Unrealized Losses (24)   (31)
More than 12 months - Fair Value 17   24
More than 12 months - Unrealized Losses 0   (1)
Mortgage- and asset-backed securities [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 374   367
Less than 12 months - Unrealized Losses (3)   (5)
More than 12 months - Fair Value 26   24
More than 12 months - Unrealized Losses (1)   0
Auction rate securities [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 0   0
Less than 12 months - Unrealized Losses 0   0
More than 12 months - Fair Value 83   83
More than 12 months - Unrealized Losses (1)   (1)
Common and preferred stock [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 347   291
Less than 12 months - Unrealized Losses (49)   (41)
More than 12 months - Fair Value 1   0
More than 12 months - Unrealized Losses 0   0
Debt funds [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 1,288   2,776
Less than 12 months - Unrealized Losses (125)   (123)
More than 12 months - Fair Value 336   4
More than 12 months - Unrealized Losses (1)   0
Equity funds [Member]
      
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 40   82
Less than 12 months - Unrealized Losses (3)   (3)
More than 12 months - Fair Value 0   0
More than 12 months - Unrealized Losses $ 0   $ 0