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Investments (Tables)
12 Months Ended
Dec. 31, 2019
Disclosure of investments accounted for using equity method [text block] [Abstract]  
Disclosure Of Detailed Information About Investments [Table Text Block]
   December 31, 
   2018   2019 
   NIS   NIS 
Current investments        
Investments in marketable securities at fair value through profit and loss and others   396    358 
Bank deposits   1,384    883 
    1,780    1,241