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Retirement Plans (Details 3) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Amounts recognized in the Consolidated Balance Sheets consist of:    
Non current liabilities $ (593) $ (516)
U.S. Pension Plans
   
Amounts recognized in the Consolidated Balance Sheets consist of:    
Current liabilities (3) (3)
Non current liabilities (305) (287)
Net amount recognized (308) (290)
Amounts recognized in accumulated other comprehensive loss (before income taxes) consist of:    
Net actuarial (loss) gain (435) (393)
Total loss recognized (435) (393)
Weighted average assumptions used to determine benefit obligations at year end:    
Discount rate (as a percent) 3.60% 4.50%
Accumulated benefit obligation and fair value of plan assets    
Accumulated benefit obligation 931 819
Accumulated benefit obligation and fair value of plan assets for plans with accumulated benefit obligations in excess of plan assets:    
Accumulated benefit obligation, plans with accumulated benefit obligations in excess of plan assets 931 819
Fair value of plan assets with accumulated benefit obligations in excess of plan assets 623 529
Aggregate benefit obligation and fair value of plan assets for plans with benefit obligations in excess of plan assets:    
Aggregate benefit obligation, plans with benefit obligations in excess of plan assets 931 819
Fair value of plan assets with benefit obligations in excess of plan assets 623 529
Target weighted-average asset allocation    
Target asset allocation, equity securities (as a percent) 60.00%  
Target asset allocation, debt securities (as a percent) 40.00%  
Weighted-average asset allocations    
Weighted-average asset allocation, equity securities (as a percent) 59.00% 55.00%
Weighted-average asset allocation, debt securities (as a percent) 39.00% 44.00%
Weighted-average asset allocation, cash and cash equivalents (as a percent) 2.00% 1.00%
Total (as a percent) 100.00% 100.00%
Non-U.S. Pension Plans
   
Amounts recognized in the Consolidated Balance Sheets consist of:    
Non-current assets   7
Current liabilities (13) (11)
Non current liabilities (225) (183)
Net amount recognized (238) (187)
Amounts recognized in accumulated other comprehensive loss (before income taxes) consist of:    
Transition asset 3 3
Net actuarial (loss) gain (390) (293)
Total loss recognized (387) (290)
Weighted average assumptions used to determine benefit obligations at year end:    
Discount rate (as a percent) 4.20% 5.20%
Rate of compensation increase (as a percent) 3.60% 3.40%
Accumulated benefit obligation and fair value of plan assets    
Accumulated benefit obligation 1,235 1,050
Accumulated benefit obligation and fair value of plan assets for plans with accumulated benefit obligations in excess of plan assets:    
Accumulated benefit obligation, plans with accumulated benefit obligations in excess of plan assets 1,224 1,034
Fair value of plan assets with accumulated benefit obligations in excess of plan assets 1,003 852
Aggregate benefit obligation and fair value of plan assets for plans with benefit obligations in excess of plan assets:    
Aggregate benefit obligation, plans with benefit obligations in excess of plan assets 1,254 1,047
Fair value of plan assets with benefit obligations in excess of plan assets 1,016 852
Target weighted-average asset allocation    
Target asset allocation, equity securities (as a percent) 48.00%  
Target asset allocation, debt securities (as a percent) 48.00%  
Target asset allocation, other asset classes (as a percent) 4.00%  
Weighted-average asset allocations    
Weighted-average asset allocation, equity securities (as a percent) 50.00% 46.00%
Weighted-average asset allocation, debt securities (as a percent) 50.00% 52.00%
Weighted-average asset allocation, cash and cash equivalents (as a percent)   2.00%
Total (as a percent) 100.00% 100.00%
Postretirement Benefit Plans
   
Amounts recognized in the Consolidated Balance Sheets consist of:    
Net amount recognized $ 40 $ 38