Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v3.8.0.1
Marketable Securities (Details) - USD ($)
$ in Millions
Dec. 24, 2017
Sep. 24, 2017
Schedule of Marketable Securities [Line Items]    
Available-for-sale - Current $ 2,038 $ 2,275
Available-for-sale - Noncurrent 4,447 1,270
Total marketable securities - Current 2,041 2,279
Total marketable securities - Noncurrent 4,447 1,270
U.S. Treasury securities and government-related securities [Member]    
Schedule of Marketable Securities [Line Items]    
Available-for-sale - Current 14 23
Available-for-sale - Noncurrent 4,409 959
Corporate bonds and notes [Member]    
Schedule of Marketable Securities [Line Items]    
Available-for-sale - Current 1,775 2,014
Available-for-sale - Noncurrent 0 271
Mortgage- and asset-backed and auction rate securities [Member]    
Schedule of Marketable Securities [Line Items]    
Available-for-sale - Current 95 93
Available-for-sale - Noncurrent 38 40
Equity and preferred securities and equity funds [Member]    
Schedule of Marketable Securities [Line Items]    
Available-for-sale - Current 42 36
Available-for-sale - Noncurrent 0 0
Debt funds [Member]    
Schedule of Marketable Securities [Line Items]    
Available-for-sale - Current 112 109
Available-for-sale - Noncurrent 0 0
Bank Time Deposits [Member]    
Schedule of Marketable Securities [Line Items]    
Other Marketable Securities, Current 3 4
Other Marketable Securities, Noncurrent $ 0 $ 0