Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities Available-for-sale Securities (Details)

v3.5.0.2
Marketable Securities Available-for-sale Securities (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 26, 2016
Jun. 28, 2015
Jun. 26, 2016
Jun. 28, 2015
Sep. 27, 2015
Contractual maturities of available-for-sale debt securities [Abstract]          
Years to Maturity - Less Than One Year $ 3,987   $ 3,987    
Years to Maturity - One to Five Years 12,341   12,341    
Years to Maturity - Five to Ten Years 2,103   2,103    
Years to Maturity - Greater Than Ten Years 788   788    
Years to Maturity - No Single Maturity Date 4,363   4,363    
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]          
Gross Realized Gains 62 $ 126 146 $ 434  
Gross Realized Losses (8) (10) (30) (48)  
Net Realized Gains 54 $ 116 116 $ 386  
Available-for-sale Securities [Abstract]          
Available-for-sale Equity Securities, Cost 1,355   1,355   $ 1,394
Available-for-sale Equity Securities, Unrealized Gains 254   254   264
Available-for-sale Equity Securities, Unrealized Losses (44)   (44)   (28)
Available-for-sale Securities Equity Securities, Fair Value 1,565   1,565   1,630
Available-for-sale Debt Securities (including debt funds), Cost 23,461   23,461   20,459
Available-for-sale Debt Securities (including debt funds), Unrealized Gains 292   292   185
Available-for-sale Debt Securities (including debt funds), Unrealized Losses (171)   (171)   (285)
Available-for-sale Debt Securities, Fair Value 23,582   23,582   20,359
Available-for-sale Securities, Cost 24,816   24,816   21,853
Available-for-sale Securities, Unrealized Gains 546   546   449
Available-for-sale Securities, Unrealized Losses (215)   (215)   (313)
Fair Value 25,147   25,147   21,989
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]          
Less than 12 months - Fair Value 4,777   4,777   11,006
More than 12 months - Fair Value 2,656   2,656   617
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized losses (90)   (90)   (245)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized losses (125)   (125)   (68)
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 421   421   304
More than 12 months - Fair Value 35   35   0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized losses (2)   (2)   (4)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized losses (1)   (1)   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 3,054   3,054   7,656
More than 12 months - Fair Value 1,488   1,488   368
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized losses (36)   (36)   (93)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized losses (82)   (82)   (62)
Mortgage- and asset-backed and 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 537   537   862
More than 12 months - Fair Value 265   265   108
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized losses (5)   (5)   (3)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized losses (2)   (2)   (1)
Equity and preferred securities and 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 447   447   392
More than 12 months - Fair Value 5   5   17
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized losses (43)   (43)   (28)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, 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 318   318   1,792
More than 12 months - Fair Value 863   863   124
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized losses (4)   (4)   (117)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Unrealized losses $ (39)   $ (39)   $ (5)