Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v3.6.0.2
Marketable Securities (Details) - USD ($)
$ in Millions
Dec. 25, 2016
Sep. 25, 2016
Schedule of Marketable Securities [Line Items]    
Total marketable securities - Current $ 3,927 $ 12,702
Total marketable securities - Noncurrent 18,973 13,702
U.S. Treasury securities and government-related securities [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 251 1,116
Available-for-sale - Noncurrent 1,639 1,099
Corporate bonds and notes [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 3,312 10,159
Available-for-sale - Noncurrent 14,435 8,584
Mortgage- and asset-backed and auction rate securities [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 176 1,363
Available-for-sale - Noncurrent 1,390 534
Equity and preferred securities and equity funds [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 88 64
Available-for-sale - Noncurrent 476 1,682
Debt funds [Member]    
Available-for-sale Securities [Abstract]    
Available-for-sale - Current 100 0
Available-for-sale - Noncurrent $ 1,033 $ 1,803