Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Details)

v3.2.0.727
Marketable Securities (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 29, 2014
USD ($)
Jun. 29, 2014
USD ($)
Jul. 21, 2015
USD ($)
Jul. 14, 2015
Jun. 28, 2015
USD ($)
Sep. 28, 2014
USD ($)
Trading Securities [Abstract]            
Trading - Current         $ 516 $ 511
Trading - Noncurrent         637 642
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         10,828 9,147
Available-for-sale - Noncurrent         12,468 13,025
Fair Value Option [Abstract]            
Total marketable securities - Current         11,344 9,658
Total marketable securities - Noncurrent         13,894 14,457
Restricted Cash and Cash Equivalents, Current         $ 47  
Effective ownership interest in debt fund (fair value option)         25.00%  
Net increases in fair value recognized in investment income $ 12 $ 30        
U.S. Treasury securities and government-related securities [Member]            
Trading Securities [Abstract]            
Trading - Current         $ 329 320
Trading - Noncurrent         6 38
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         138 805
Available-for-sale - Noncurrent         708 392
Fair Value Option [Abstract]            
Restricted Marketable Securities         79  
Corporate bonds and notes            
Trading Securities [Abstract]            
Trading - Current         187 191
Trading - Noncurrent         379 367
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         8,628 6,274
Available-for-sale - Noncurrent         7,078 7,649
Fair Value Option [Abstract]            
Restricted Marketable Securities         2,900  
Mortgage- and asset-backed securities [Member]            
Trading Securities [Abstract]            
Trading - Current         0 0
Trading - Noncurrent         252 237
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         1,297 1,063
Available-for-sale - Noncurrent         216 195
Fair Value Option [Abstract]            
Restricted Marketable Securities         790  
Auction rate securities            
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         0 0
Available-for-sale - Noncurrent         46 83
Common and preferred stock            
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         550 192
Available-for-sale - Noncurrent         886 1,605
Equity funds            
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         0 0
Available-for-sale - Noncurrent         496 541
Debt funds            
Available-for-sale Securities [Abstract]            
Available-for-sale - Current         215 813
Available-for-sale - Noncurrent         3,038 2,560
Fair Value Option [Abstract]            
Fair value option - Current         0 0
Fair value option - Noncurrent         $ 789 $ 790
Subsequent Event [Member]            
Fair Value Option [Abstract]            
Foreign Currency Exchange Rate, Remeasurement       1.5634    
Subsequent Event [Member] | United Kingdom, Pounds            
Fair Value Option [Abstract]            
Threshold To Set Aside Marketable Securities     $ 1,900      
Subsequent Event [Member] | United States of America, Dollars            
Fair Value Option [Abstract]            
Threshold To Set Aside Marketable Securities     $ 2,900