Annual report pursuant to Section 13 and 15(d)

Marketable Securities Marketable Securities Table (Details)

v2.3.0.15
Marketable Securities Marketable Securities Table (Details) (USD $)
In Millions
12 Months Ended
Sep. 25, 2011
Sep. 26, 2010
Sep. 27, 2009
Available-for-sale Securities [Abstract]      
Available-for-sale - Current $ 6,190 $ 6,332  
Available-for-sale - Noncurrent 8,785 7,656  
Fair Value Option [Abstract]      
Debt mutual fund - Current 0 0  
Debt mutual fund - Noncurrent 476 467  
Time deposits - Current 0 400  
Time deposits - Noncurrent 0 0  
Marketable Securities - Current 6,190 6,732  
Marketable Securities - Noncurrent 9,261 8,123  
Contractual Maturities of Available-for-sale Debt Securities [Abstract]      
Years to Maturity - Less Than One Year 1,084    
Years to Maturity - One to Five Years 4,600    
Years to Maturity - Five to Ten Years 2,450    
Years to Maturity - Greater Than Ten Years 952    
Years to Maturity - No Single Maturity Date 3,255    
Total 12,341    
Realized Gains and Losses on Sales of Available-for-sale Marketable Securities [Abstract]      
Gross Realized Gains 356 415 215
Gross Realized Losses (30) (31) (79)
Net Realized Gains 326 384 136
Available-for-sale Securities [Abstract]      
Cost 14,605 13,104  
Unrealized Gains 572 915  
Unrealized Losses (202) (31)  
Fair Value 14,975 13,988  
Investments in a Continuous Unrealized Loss Position [Abstract]      
Less than 12 months - Fair value 4,482 1,131  
Less than 12 months - Unrealized losses (197) (19)  
More than 12 months - Fair value 185 242  
More than 12 months - Unrealized losses (5) (12)  
Activity for Credit Loss Portion of Other-than-temporary Impairments on Debt Securities [Roll Forward]      
Beginning balance of credit losses 109 170 0
Credit losses remaining in retained earnings upon adoption 0 0 186
Reductions in credit losses related to securities the Company intends to sell (40) 0 (14)
Credit losses recognized on securities previously not impaired 2 1 17
Additional credit losses recognized on securities previously impaired 0 1 2
Reductions in credit losses related to securities sold (20) (39) (21)
Accretion of credit losses due to an increase in cash flows expected to be collected (5) (24) 0
Ending balance of credit losses 46 109 170
U.S. Treasury securities and government-related securities [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 516 650  
Available-for-sale - Noncurrent 6 4  
Corporate bonds and notes [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 3,665 3,504  
Available-for-sale - Noncurrent 2,353 1,495  
Investments in a Continuous Unrealized Loss Position [Abstract]      
Less than 12 months - Fair value 1,862 425  
Less than 12 months - Unrealized losses (41) (1)  
More than 12 months - Fair value 41 23  
More than 12 months - Unrealized losses 0 0  
Mortgage- and asset-backed securities [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 587 629  
Available-for-sale - Noncurrent 91 38  
Auction rate securities [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 0 0  
Available-for-sale - Noncurrent 124 126  
Investments in a Continuous Unrealized Loss Position [Abstract]      
Less than 12 months - Fair value 3 0  
Less than 12 months - Unrealized losses 0 0  
More than 12 months - Fair value 121 126  
More than 12 months - Unrealized losses (2) (4)  
Non-investment-grade debt securities [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 19 21  
Available-for-sale - Noncurrent 3,653 3,344  
Investments in a Continuous Unrealized Loss Position [Abstract]      
Less than 12 months - Fair value 1,867 296  
Less than 12 months - Unrealized losses (86) (7)  
More than 12 months - Fair value 19 90  
More than 12 months - Unrealized losses (3) (8)  
Common and preferred stock [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 76 52  
Available-for-sale - Noncurrent 1,713 1,670  
Investments in a Continuous Unrealized Loss Position [Abstract]      
Less than 12 months - Fair value 750 133  
Less than 12 months - Unrealized losses (70) (10)  
More than 12 months - Fair value 4 3  
More than 12 months - Unrealized losses 0 0  
Equity mutual and exchange-traded funds [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 0 0  
Available-for-sale - Noncurrent 845 979  
Investments in a Continuous Unrealized Loss Position [Abstract]      
Less than 12 months - Fair value   277  
Less than 12 months - Unrealized losses   (1)  
More than 12 months - Fair value   0  
More than 12 months - Unrealized losses   0  
Debt mutual funds [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 1,327 1,476  
Available-for-sale - Noncurrent 0 0  
Equity Securities [Member]
     
Available-for-sale Securities [Abstract]      
Cost 2,426 2,309  
Unrealized Gains 278 403  
Unrealized Losses (70) (11)  
Fair Value 2,634 2,701  
Debt Securities [Member]
     
Available-for-sale Securities [Abstract]      
Cost 12,179 10,795  
Unrealized Gains 294 512  
Unrealized Losses (132) (20)  
Fair Value $ 12,341 $ 11,287