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Acquistions (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Oct. 28, 2012
Jul. 29, 2012
Jul. 28, 2013
Jul. 29, 2012
Jul. 31, 2011
Apr. 28, 2013
Bolthouse Farms [Member]
Jul. 28, 2013
Bolthouse Farms [Member]
Aug. 06, 2012
Bolthouse Farms [Member]
Aug. 06, 2012
Bolthouse Farms [Member]
Customer Relationships [Member]
Jul. 28, 2013
Plum Organics [Member]
Jun. 13, 2013
Plum Organics [Member]
Jun. 13, 2013
Plum Organics [Member]
Customer Relationships [Member]
Jun. 13, 2013
Plum Organics [Member]
Trade Names [Member]
Business Acquisition [Line Items]                          
Business Acquisition, Cost of Acquired Entity, Purchase Price               $ 1,550          
Business Combination, Initial Purchase Price Adjustment               20          
Business Combination, Purchase Price Adjustment           11              
Business Combination, Acquisition Related Costs 10 5 10 5 0                
Business Combination, Acquisition Related After Tax Costs 7 3                      
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual             756     14      
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual             18     (2)      
Business Acquisition, Purchase Price Allocation, Goodwill Amount             692 692   128 128    
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount             284            
Business Acquisition, Cost of Acquired Entity, Purchase Price               1,561     249    
Business Acquisition, Purchase Price Allocation, Intangible Assets Not Amortizable                         115
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets                 $ 132     $ 18  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life                 20 years     15 years