Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities Marketable Securities Table (Details)

v2.4.0.6
Marketable Securities Marketable Securities Table (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 30, 2012
Dec. 25, 2011
Sep. 30, 2012
Schedule of Marketable Securities [Line Items]      
Total marketable securities - Current $ 8,982   $ 8,567
Total marketable securities - Noncurrent 15,096   14,463
Trading Securities [Abstract]      
Trading - Current 504   479
Trading - Noncurrent 431   550
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 8,478   8,088
Available-for-sale - Noncurrent 14,134   13,393
Contractual maturities of available-for-sale debt securities [Abstract]      
Years to Maturity - Less Than One Year 536    
Years to Maturity - One to Five Years 7,597    
Years to Maturity - Five to Ten Years 4,072    
Years to Maturity - Greater Than Ten Years 1,362    
Years to Maturity - No Single Maturity Date 5,829    
Total 19,396    
Realized Gains and Losses on Sales of Available-for-sale Securities [Abstract]      
Gross Realized Gains 84 36  
Gross Realized Losses (5) (2)  
Net Realized Gains 79 34  
Available-for-sale Securities [Abstract]      
Cost 21,443   20,313
Unrealized Gains 1,205   1,201
Unrealized Losses (36)   (33)
Fair Value 22,612   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 3,282   1,035
Less than 12 months - Unrealized Losses (26)   (18)
More than 12 months - Fair Value 306   423
More than 12 months - Unrealized Losses (10)   (15)
Activity for Credit Loss Portion of Other-than-temporary Impairments on Debt Securities [Roll Forward]      
Beginning balance of credit losses 31 46  
Additional credit losses recognized on securities previously impaired 0 1  
Reductions in credit losses related to securities sold (12) (1)  
Ending balance of credit losses 19 46  
U.S. Treasury securities and government-related securities [Member]
     
Trading Securities [Abstract]      
Trading - Current 181   196
Trading - Noncurrent 124   254
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 406   362
Available-for-sale - Noncurrent 625   592
Corporate bonds and notes [Member]
     
Trading Securities [Abstract]      
Trading - Current 323   283
Trading - Noncurrent 190   176
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 4,539   4,554
Available-for-sale - Noncurrent 7,997   7,570
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 1,501   723
Less than 12 months - Unrealized Losses (11)   (8)
More than 12 months - Fair Value 165   256
More than 12 months - Unrealized Losses (6)   (9)
Mortgage- and asset-backed securities [Member]
     
Trading Securities [Abstract]      
Trading - Current 0   0
Trading - Noncurrent 117   120
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 1,169   1,157
Available-for-sale - Noncurrent 291   241
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 177   143
Less than 12 months - Unrealized Losses (1)   (1)
More than 12 months - Fair Value 5   7
More than 12 months - Unrealized Losses 0   0
Auction rate securities [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 0   0
Available-for-sale - Noncurrent 85   118
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
Less than 12 months - Unrealized Losses 0   0
More than 12 months - Fair Value 85   115
More than 12 months - Unrealized Losses (1)   (1)
Common and preferred stock [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 51   57
Available-for-sale - Noncurrent 2,178   2,030
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 165   105
Less than 12 months - Unrealized Losses (9)   (5)
More than 12 months - Fair Value 10   9
More than 12 months - Unrealized Losses (1)   0
Equity funds [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 0   0
Available-for-sale - Noncurrent 987   1,126
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 57   64
Less than 12 months - Unrealized Losses (2)   (4)
More than 12 months - Fair Value 37   36
More than 12 months - Unrealized Losses (2)   (5)
Debt funds [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 2,313   1,958
Available-for-sale - Noncurrent 1,971   1,716
Fair Value Option [Abstract]      
Fair value option - Current 0   0
Fair value option - Noncurrent 531   520
Investments Classified as Available-for-sale in a Continuous Unrealized Loss Position Deemed to be Temporary [Abstract]      
Less than 12 months - Fair Value 1,382    
Less than 12 months - Unrealized Losses (3)    
More than 12 months - Fair Value 4    
More than 12 months - Unrealized Losses 0    
Equity securities [Member]
     
Available-for-sale Securities [Abstract]      
Cost 2,619   2,599
Unrealized Gains 611   628
Unrealized Losses (14)   (14)
Fair Value 3,216   3,213
Debt securities (including debt funds) [Member]
     
Available-for-sale Securities [Abstract]      
Cost 18,824   17,714
Unrealized Gains 594   573
Unrealized Losses (22)   (19)
Fair Value $ 19,396   $ 18,268