Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v2.4.0.8
Marketable Securities (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Sep. 29, 2013
Schedule of Marketable Securities [Line Items]      
Total marketable securities - Current $ 8,988   $ 8,824
Total marketable securities - Noncurrent 14,330   14,440
Trading Securities [Abstract]      
Trading - Current 509   510
Trading - Noncurrent 402   409
Net gains (losses) recognized on debt securities classified as trading that are still held at the end of the period 0 0  
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 8,479   8,314
Available-for-sale - Noncurrent 13,385   13,494
Fair Value Option [Abstract]      
Effective ownership interest in debt fund (fair value option) 20.00%    
U.S. Treasury securities and government-related securities [Member]
     
Trading Securities [Abstract]      
Trading - Current 289   241
Trading - Noncurrent 21   49
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 968   721
Available-for-sale - Noncurrent 73   71
Corporate bonds and notes [Member]
     
Trading Securities [Abstract]      
Trading - Current 220   269
Trading - Noncurrent 260   256
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 4,858   4,533
Available-for-sale - Noncurrent 6,889   6,812
Mortgage- and asset-backed securities [Member]
     
Trading Securities [Abstract]      
Trading - Current 0   0
Trading - Noncurrent 121   104
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 719   745
Available-for-sale - Noncurrent 327   328
Auction rate securities [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 0   0
Available-for-sale - Noncurrent 83   83
Common and preferred stock [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 49   8
Available-for-sale - Noncurrent 2,480   2,351
Debt funds [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 1,732   2,307
Available-for-sale - Noncurrent 2,894   2,889
Fair Value Option [Abstract]      
Fair value option - Current 0   0
Fair value option - Noncurrent 543   537
Increase in fair value recognized in investment income 13 10  
Equity funds [Member]
     
Available-for-sale Securities [Abstract]      
Available-for-sale - Current 153   0
Available-for-sale - Noncurrent $ 639   $ 960