Annual report pursuant to Section 13 and 15(d)

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

v2.3.0.15
Fair Value Measurements Activity Between Levels of the Fair Value Hierarchy (Details) (USD $)
In Millions
12 Months Ended
Sep. 25, 2011
Sep. 26, 2010
Auction Rate Securities [Member]
   
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 $ 126 $ 174
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, Sales, Issuances, Settlements [Abstract]    
Included in investment income, net 0 0
Included in other comprehensive income 2 7
Purchases 4 0
Issuances 0 0
Settlements (8) (55)
Transfers into Level 3 0 0
Ending balance of Level 3 124 126
Other Marketable Securities [Member]
   
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 18 31
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, Sales, Issuances, Settlements [Abstract]    
Included in investment income, net 2 5
Included in other comprehensive income (1) (1)
Purchases 6 0
Issuances 0 0
Settlements (6) (21)
Transfers into Level 3 8 4
Ending balance of Level 3 27 18
Other Liabilities [Member]
   
Activity for Marketable Securities Classified Within Level 3 of the Valuation Hierarchy [Roll Forward]    
Beginning balance of Level 3 0  
Total Realized and Unrealized Gains (Losses):    
Included in investment income (loss), net (1)  
Included in other comprehensive income 0  
Purchases 0  
Issuances 8  
Settlements 0  
Transfers into Level 3 0  
Ending balance of Level 3 $ 7