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 9 Months Ended
Jun. 29, 2014
Sep. 29, 2013
Jun. 30, 2013
Jun. 29, 2014
Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]          
Available-for-sale Equity Securities, Amortized Cost Basis $ 2,000 $ 2,570   $ 2,000  
Available-for-sale Equity Securities, Gross Unrealized Gain 692 793      
Available-for-sale Equity Securities, Gross Unrealized Loss 5 44      
Available-for-sale Securities Equity Securities, Fair Value 2,687 3,319   2,687  
Available-for-sale Debt Securities (including debt funds), Amortized Cost Basis 19,741 18,255   19,741  
Available-for-sale Debt Securities Gross Unrealized Gain 423 396      
Available-for-sale Debt Securities, Gross Unrealized Loss 20 162      
Available-for-sale Debt Securities, Fair Value 20,144 18,489   20,144  
Contractual maturities of available-for-sale debt securities [Abstract]          
Years to Maturity - Less Than One Year 2,993     2,993  
Years to Maturity - One to Five Years 10,255     10,255  
Years to Maturity - Five to Ten Years 1,594     1,594  
Years to Maturity - Greater Than Ten Years 660     660  
Years to Maturity - No Single Maturity Date 4,642     4,642  
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]          
Gross Realized Gains 267   52 610 204
Gross Realized Losses 8   5 16 14
Net Realized Gains 259   47 594 190
Available-for-sale Securities [Abstract]          
Cost 21,741 20,825   21,741  
Unrealized Gains 1,115 1,189      
Unrealized Losses 25 206      
Fair Value 22,831 21,808   22,831  
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 2,113 5,642   2,113  
Less than 12 months - Unrealized Losses (6) (204)      
More than 12 months - Fair Value 688 135   688  
More than 12 months - Unrealized Losses (19) (2)      
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   42      
Less than 12 months - Unrealized Losses   (1)      
More than 12 months - Fair Value   0      
More than 12 months - Unrealized Losses   0      
Corporate bonds and notes
         
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 2,033 2,084   2,033  
Less than 12 months - Unrealized Losses (5) (31)      
More than 12 months - Fair Value 96 24   96  
More than 12 months - Unrealized Losses (2) (1)      
Mortgage- and asset-backed securities
         
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value   367      
Less than 12 months - Unrealized Losses   (5)      
More than 12 months - Fair Value   24      
More than 12 months - Unrealized Losses   0      
Auction rate securities
         
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   0  
Less than 12 months - Unrealized Losses 0 0      
More than 12 months - Fair Value 83 83   83  
More than 12 months - Unrealized Losses (1) (1)      
Common and preferred stock
         
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value   291      
Less than 12 months - Unrealized Losses   (41)      
More than 12 months - Fair Value   0      
More than 12 months - Unrealized Losses   0      
Debt funds
         
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 50 2,776   50  
Less than 12 months - Unrealized Losses (1) (123)      
More than 12 months - Fair Value 394 4   394  
More than 12 months - Unrealized Losses (11) 0      
Equity funds
         
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 30 82   30  
Less than 12 months - Unrealized Losses 0 (3)      
More than 12 months - Fair Value 115 0   115  
More than 12 months - Unrealized Losses $ (5) $ 0