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Pension and Other Benefit Programs - One Percentage Point (ppt) Change on Projected Benefit Obligations (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 28, 2013
Compensation and Retirement Disclosure [Abstract]  
Impact of 1 ppt Discount Rate decrease on Benefit Expense $ 204
Impact of 1 ppt Discount Rate increase on Benefit Expense (192)
Impact of 1 ppt Discount Rate decrease on Projected Benefit Obligations 1,912
Impact of 1 ppt Discount Rate increase on Projected Benefit Obligations (1,629)
Impact of 1 ppt Expected Long-Term Rate of Return on Assets Decrease on Benefit Expense 90
Impact of 1 ppt Expected Long-Term Rate of Return on Assets Increase on Benefit Expense (90)
Impact of 1 ppt Healthcare Cost Trend Rate decrease on Net Periodic Postretirement Medical Cost (24)
Impact of 1 ppt Healthcare Cost Trend Rate increase on Net Periodic Postretirement Medical Cost 34
Impact of 1 ppt Healthcare Cost Trend Rate decrease on Projected Benefit Obligations (171)
Impact of 1 ppt Healthcare Cost Trend Rate increase on Projected Benefit Obligations $ 209