Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities Available-for-sale Securities (Details)

v3.2.0.727
Marketable Securities Available-for-sale Securities (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 28, 2015
Jun. 29, 2014
Jun. 28, 2015
Jun. 29, 2014
Sep. 28, 2014
Contractual maturities of available-for-sale debt securities [Abstract]          
Years to Maturity - Less Than One Year $ 3,750   $ 3,750    
Years to Maturity - One to Five Years 11,156   11,156    
Years to Maturity - Five to Ten Years 1,005   1,005    
Years to Maturity - Greater Than Ten Years 641   641    
Years to Maturity - No Single Maturity Date 4,812   4,812    
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]          
Gross Realized Gains 126 $ 267 434 $ 610  
Gross Realized Losses (10) (8) (48) (16)  
Net Realized Gains 116 $ 259 386 $ 594  
Available-for-sale Securities [Abstract]          
Available-for-sale Equity Securities, Amortized Cost Basis 1,543   1,543   $ 1,769
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax 391   391   575
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (2)   (2)   (6)
Available-for-sale Securities Equity Securities, Fair Value 1,932   1,932   2,338
Available-for-sale Debt Securities (including debt funds), Amortized Cost Basis 21,203   21,203   19,582
Available-for-sale Debt Securities (including debt funds), Accumulated Gross Unrealized Gain, before Tax 253   253   312
Available-for-sale Debt Securities (including debt funds), Accumulated Gross Unrealized Loss, before Tax (92)   (92)   (60)
Available-for-sale Debt Securities, Fair Value 21,364   21,364   19,834
Cost 22,746   22,746   21,351
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 644   644   887
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (94)   (94)   (66)
Fair Value 23,296   23,296   22,172
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 9,689   9,689   5,906
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (83)   (83)   (38)
More than 12 months - Fair Value 269   269   675
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (11)   (11)   (28)
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 313   313   279
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2)   (2)   (2)
More than 12 months - Fair Value 0   0   0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0   0   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 7,413   7,413   4,924
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (59)   (59)   (31)
More than 12 months - Fair Value 142   142   104
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (9)   (9)   (4)
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 874   874   484
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2)   (2)   (1)
More than 12 months - Fair Value 16   16   52
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0   0   (1)
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
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 0   0   0
More than 12 months - Fair Value 46   46   83
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (1)   (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 155   155   86
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (2)   (2)   (3)
More than 12 months - Fair Value 18   18   52
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 0   0   (3)
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 934   934   133
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (18)   (18)   (1)
More than 12 months - Fair Value 47   47   384
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (1)   $ (1)   $ (19)