Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v3.5.0.2
Marketable Securities (Details) - USD ($)
$ in Millions
Jun. 26, 2016
Sep. 27, 2015
Schedule of Marketable Securities [Line Items]    
Total marketable securities - Current $ 11,225 $ 9,761
Total marketable securities - Noncurrent 13,922 13,626
Ending balance of the credit loss portion of other-than-temporary impairments on debt securities 61  
Trading Securities [Abstract]    
Trading - Current 0 0
Trading - Noncurrent 0 618
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 11,225 9,761
Available-for-sale - Noncurrent 13,922 12,228
U.S. Treasury securities and government-related securities [Member]    
Trading Securities [Abstract]    
Trading - Current 0 0
Trading - Noncurrent 0 12
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 217 156
Available-for-sale - Noncurrent 1,931 691
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 9,381 7,926
Available-for-sale - Noncurrent 7,778 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 1,521 1,302
Available-for-sale - Noncurrent 538 263
Equity and preferred securities and equity funds [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 106 377
Available-for-sale - Noncurrent 1,459 1,253
Debt funds [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 0 0
Available-for-sale - Noncurrent 2,216 2,909
Fair Value Option [Abstract]    
Fair value option - Current 0 0
Fair value option - Noncurrent $ 0 $ 780