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 6 Months Ended
Mar. 30, 2014
Sep. 29, 2013
Mar. 31, 2013
Mar. 30, 2014
Mar. 31, 2013
Schedule of Available-for-sale Securities [Line Items]          
Available-for-sale Equity Securities, Amortized Cost Basis $ 2,340 $ 2,570   $ 2,340  
Available-for-sale Equity Securities, Gross Unrealized Gain 743 793      
Available-for-sale Equity Securities, Gross Unrealized Loss (12) (44)      
Available-for-sale Securities Equity Securities, Fair Value 3,071 3,319   3,071  
Available-for-sale Debt Securities, Amortized Cost Basis 20,849 18,255   20,849  
Available-for-sale Debt Securities Gross Unrealized Gain 386 396      
Available-for-sale Debt Securities, Gross Unrealized Loss (63) (162)      
Available-for-sale Debt Securities, Fair Value 21,172 18,489   21,172  
Contractual maturities of available-for-sale debt securities [Abstract]          
Years to Maturity - Less Than One Year 1,975     1,975  
Years to Maturity - One to Five Years 10,327     10,327  
Years to Maturity - Five to Ten Years 1,815     1,815  
Years to Maturity - Greater Than Ten Years 977     977  
Years to Maturity - No Single Maturity Date 6,078     6,078  
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]          
Gross Realized Gains 227   69 343 153
Gross Realized Losses (5)   (4) (8) (9)
Net Realized Gains 222   65 335 144
Available-for-sale Securities [Abstract]          
Cost 23,189 20,825   23,189  
Available-for-sale Securities, Gross Unrealized Gain 1,129 1,189      
Available-for-sale Securities, Gross Unrealized Loss (75) (206)      
Fair Value 24,243 21,808   24,243  
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 5,147 5,642   5,147  
Less than 12 months - Unrealized Losses (72) (204)      
More than 12 months - Fair Value 248 135   248  
More than 12 months - Unrealized Losses (3) (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 236 42   236  
Less than 12 months - Unrealized Losses (3) (1)      
More than 12 months - Fair Value 5 0   5  
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 3,724 2,084   3,724  
Less than 12 months - Unrealized Losses (21) (31)      
More than 12 months - Fair Value 26 24   26  
More than 12 months - Unrealized Losses (1) (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 313 367   313  
Less than 12 months - Unrealized Losses (2) (5)      
More than 12 months - Fair Value 41 24   41  
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   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 [Member]
          
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 [Member]
          
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 672 2,776   672  
Less than 12 months - Unrealized Losses (34) (123)      
More than 12 months - Fair Value 88 4   88  
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 202 82   202  
Less than 12 months - Unrealized Losses (12) (3)      
More than 12 months - Fair Value 5 0   5  
More than 12 months - Unrealized Losses $ 0 $ 0