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The Company and Significant Accounting Policies (Narrative) (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
6 Months Ended
Jun. 14, 2014
Jun. 15, 2013
Mar. 06, 2014
Casa Ley [Member]
Mar. 06, 2014
Albertsons [Member]
Safeway [Member]
Mar. 24, 2014
Common Class B [Member]
Blackhawk Network Holdings, Inc. [Member]
Business Acquisition [Line Items]          
Stockholders' right to receive cash per share of outstanding Safeway stock       $ 32.50  
Ownership interest     49.00%    
Increase per day of stockholders' right to receive cash per share of outstanding Safeway stock       $ 0.005342  
Subsidiary shares owned         37.8
Restricted cash $ 40,000,000        
LIFO expense 0 0      
Cash surrender value of life insurance policy 58,900,000        
Policy loan balance 41,900,000        
Net cash surrender value of life insurance policy $ 17,000,000