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Company Participation in Multi Employer Plan (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jul. 03, 2010
Multiemployer Plans [Line Items]      
Contributions $ 2 $ 3 $ 4
Bakery And Confectionery Union And Industry International Pension Fund
     
Multiemployer Plans [Line Items]      
EIN Number 526118572    
Pension Plan Number 001    
PPA Zone Status Red Green  
FIP/RP Status Pending/Implemented Pending    
Contributions 2 2 3
Surcharge Imposed 5.00%    
Expiration Date of Collective Bargaining Agreement Oct. 31, 2014    
All Other Multiemployer Plans
     
Multiemployer Plans [Line Items]      
Contributions   $ 1 $ 1