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Fair Value Measurements Fair Value Measurement (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended 1 Months Ended 3 Months Ended
Jun. 28, 2014
Common Stock and Warrants [Member]
Jun. 28, 2014
Facility Closing [Member]
Prepared Foods [Member]
Jun. 28, 2014
Operating Segments [Member]
Facility Closing [Member]
Prepared Foods [Member]
Jun. 28, 2014
Operating Segments [Member]
Facility Closing [Member]
Prepared Foods [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities $ 6      
Asset Impairment Charges   $ 49 [1] $ 49 $ 49
[1] Includes $49 million impairment charge related to the planned closure of three Prepared Foods plants.