Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities Available-for-sale Securities (Details)

v2.4.0.8
Marketable Securities Available-for-sale Securities (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 24, 2012
Jun. 30, 2013
Jun. 24, 2012
Sep. 30, 2012
Contractual maturities of available-for-sale debt securities [Abstract]          
Years to Maturity - Less Than One Year $ 2,403   $ 2,403    
Years to Maturity - One to Five Years 8,024   8,024    
Years to Maturity - Five to Ten Years 3,900   3,900    
Years to Maturity - Greater Than Ten Years 1,341   1,341    
Years to Maturity - No Single Maturity Date 6,721   6,721    
Total 22,389   22,389    
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]          
Gross Realized Gains 52 76 204 177  
Gross Realized Losses (5) (7) (14) (14)  
Net Realized Gains 47 69 190 163  
Available-for-sale Securities [Abstract]          
Cost 25,213   25,213   20,313
Unrealized Gains 1,245   1,245   1,201
Unrealized Losses (355)   (355)   (33)
Fair Value 26,103   26,103   21,481
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 11,462   11,462   1,035
Less than 12 months - Unrealized Losses (352)   (352)   (18)
More than 12 months - Fair Value 154   154   423
More than 12 months - Unrealized Losses (3)   (3)   (15)
Equity Securities [Member]
          
Available-for-sale Securities [Abstract]          
Cost 2,929   2,929   2,599
Unrealized Gains 821   821   628
Unrealized Losses (36)   (36)   (14)
Fair Value 3,714   3,714   3,213
Debt Securities [Member]
          
Available-for-sale Securities [Abstract]          
Cost 22,284   22,284   17,714
Unrealized Gains 424   424   573
Unrealized Losses (319)   (319)   (19)
Fair Value 22,389   22,389   18,268
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 418   418    
Less than 12 months - Unrealized Losses (24)   (24)    
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 6,311   6,311   723
Less than 12 months - Unrealized Losses (140)   (140)   (8)
More than 12 months - Fair Value 49   49   256
More than 12 months - Unrealized Losses (1)   (1)   (9)
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 577   577   143
Less than 12 months - Unrealized Losses (10)   (10)   (1)
More than 12 months - Fair Value 9   9   7
More than 12 months - Unrealized Losses 0   0   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   0
Less than 12 months - Unrealized Losses 0   0   0
More than 12 months - Fair Value 83   83   115
More than 12 months - Unrealized Losses (1)   (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 337   337   105
Less than 12 months - Unrealized Losses (24)   (24)   (5)
More than 12 months - Fair Value 9   9   9
More than 12 months - Unrealized Losses (1)   (1)   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 3,580   3,580    
Less than 12 months - Unrealized Losses (143)   (143)    
More than 12 months - Fair Value 4   4    
More than 12 months - Unrealized Losses 0   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 239   239   64
Less than 12 months - Unrealized Losses (11)   (11)   (4)
More than 12 months - Fair Value 0   0   36
More than 12 months - Unrealized Losses $ 0   $ 0   $ (5)