Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements Activity Between Levels of the Fair Value Hierarchy, Assets (Details)

v3.10.0.1
Fair Value Measurements Activity Between Levels of the Fair Value Hierarchy, Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2018
Sep. 24, 2017
Marketable Securities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 $ 40 $ 43
Total realized and unrealized gains or losses included in other comprehensive (loss) income 0 0
Issuances 0 0
Purchases 0 0
Sales 0 0
Settlements (5) (3)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Ending balance of Level 3 35 40
Other Investments [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 125 37
Total realized and unrealized gains or losses included in other comprehensive (loss) income 7 8
Issuances 0 0
Purchases 7 111
Sales 0 0
Settlements (129) (34)
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Ending balance of Level 3 16 125
Other Liabilities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 196 0
Total realized and unrealized gains or losses included in other comprehensive (loss) income 0 0
Issuances 0 203
Purchases 0 0
Sales 0 0
Settlements (46) 0
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Ending balance of Level 3 86 196
Selling, general and administrative and other expenses [Member] | Marketable Securities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Total realized and unrealized gains or losses included in earnings 0 0
Selling, general and administrative and other expenses [Member] | Other Investments [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Total realized and unrealized gains or losses included in earnings 0 0
Selling, general and administrative and other expenses [Member] | Other Liabilities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Total realized and unrealized gains or losses included in earnings (64) (7)
Investment and other income, net [Member] | Marketable Securities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Total realized and unrealized gains or losses included in earnings 0 0
Investment and other income, net [Member] | Other Investments [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Total realized and unrealized gains or losses included in earnings 6 3
Investment and other income, net [Member] | Other Liabilities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Total realized and unrealized gains or losses included in earnings $ 0 $ 0