Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
Fair Value Measurements Activity Between Levels of the Fair Value Hierarchy, Assets (Details) - USD ($)
$ in Millions
 9 Months Ended
Jun. 28, 2015
Jun. 29, 2014
Auction Rate Securities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 $ 83 $ 83
Total realized and unrealized gains or losses included in investment income, net 0 0
Total realized and unrealized gains or losses included in other comprehensive income 0 0
Purchases 0 0
Sales 0 0
Settlements (37) 0
Transfers out of Level 3 0 0
Ending balance of Level 3 46 83
Mortgage- and asset-backed securities [Member]    
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 186 239
Total realized and unrealized gains or losses included in investment income, net 3 10
Total realized and unrealized gains or losses included in other comprehensive income (4) (4)
Purchases 62 86
Sales (46) (124)
Settlements (20) (28)
Transfers out of Level 3 0 (2)
Ending balance of Level 3 $ 181 $ 177