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Related Parties (Narrative) (Details) - ILS (₪)
₪ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2001
Disclosure of transactions between related parties [line items]          
Percentage of group insurance policy 30.00%        
Equity ₪ 1,880 ₪ 1,887 ₪ 1,677 ₪ 1,405 ₪ 486
Revenues 3,676 3,708 ₪ 3,688    
Related parties [Member]          
Disclosure of transactions between related parties [line items]          
Debentures balance held 17 10      
IBC [Member]          
Disclosure of transactions between related parties [line items]          
Proceeds from sale of independent fiber-optic infrastructure in residential areas   ₪ 181      
Revenues ₪ 23