Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v3.3.1.900
Marketable Securities (Details) - USD ($)
$ in Millions
Mar. 27, 2016
Sep. 27, 2015
Schedule of Marketable Securities [Line Items]    
Total marketable securities - Current $ 10,627 $ 9,761
Total marketable securities - Noncurrent 13,582 13,626
Ending balance of the credit loss portion of other-than-temporary impairments on debt securities 52  
Trading Securities [Abstract]    
Trading - Current 0 0
Trading - Noncurrent 23 618
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 10,627 9,761
Available-for-sale - Noncurrent 13,559 12,228
U.S. Treasury securities and government-related securities [Member]    
Trading Securities [Abstract]    
Trading - Current 0 0
Trading - Noncurrent 23 12
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 238 156
Available-for-sale - Noncurrent 861 691
Corporate bonds and notes [Member]    
Trading Securities [Abstract]    
Trading - Current 0 0
Trading - Noncurrent 0 364
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 8,770 7,926
Available-for-sale - Noncurrent 7,926 7,112
Mortgage- and asset-backed and auction rate securities [Member]    
Trading Securities [Abstract]    
Trading - Current 0 0
Trading - Noncurrent 0 242
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 1,505 1,302
Available-for-sale - Noncurrent 461 263
Equity and preferred securities and equity funds [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 114 377
Available-for-sale - Noncurrent 1,377 1,253
Debt funds [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 0 0
Available-for-sale - Noncurrent 2,934 2,909
Fair Value Option [Abstract]    
Fair value option - Current 0 0
Fair value option - Noncurrent $ 0 $ 780